2504 lines
64 KiB
C#
2504 lines
64 KiB
C#
//
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// constant.cs: Constants.
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//
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// Author:
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// Miguel de Icaza (miguel@ximian.com)
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// Marek Safar (marek.safar@gmail.com)
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//
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// Copyright 2001-2003 Ximian, Inc.
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// Copyright 2003-2008 Novell, Inc.
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// Copyright 2011-2013 Xamarin Inc
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//
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using System;
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using System.Globalization;
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#if STATIC
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using IKVM.Reflection.Emit;
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#else
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using System.Reflection.Emit;
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#endif
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namespace Mono.CSharp {
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/// <summary>
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/// Base class for constants and literals.
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/// </summary>
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public abstract class Constant : Expression
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{
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static readonly NumberFormatInfo nfi = CultureInfo.InvariantCulture.NumberFormat;
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protected Constant (Location loc)
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{
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this.loc = loc;
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}
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override public string ToString ()
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{
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return this.GetType ().Name + " (" + GetValueAsLiteral () + ")";
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}
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/// <summary>
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/// This is used to obtain the actual value of the literal
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/// cast into an object.
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/// </summary>
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public abstract object GetValue ();
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public abstract long GetValueAsLong ();
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public abstract string GetValueAsLiteral ();
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#if !STATIC
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//
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// Returns an object value which is typed to contant type
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//
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public virtual object GetTypedValue ()
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{
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return GetValue ();
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}
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#endif
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public override void Error_ValueCannotBeConverted (ResolveContext ec, TypeSpec target, bool expl)
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{
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if (!expl && IsLiteral && type.BuiltinType != BuiltinTypeSpec.Type.Double &&
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BuiltinTypeSpec.IsPrimitiveTypeOrDecimal (target) &&
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BuiltinTypeSpec.IsPrimitiveTypeOrDecimal (type)) {
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ec.Report.Error (31, loc, "Constant value `{0}' cannot be converted to a `{1}'",
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GetValueAsLiteral (), target.GetSignatureForError ());
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} else {
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base.Error_ValueCannotBeConverted (ec, target, expl);
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}
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}
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public Constant ImplicitConversionRequired (ResolveContext ec, TypeSpec type)
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{
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Constant c = ConvertImplicitly (type);
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if (c == null)
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Error_ValueCannotBeConverted (ec, type, false);
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return c;
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}
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public override bool ContainsEmitWithAwait ()
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{
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return false;
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}
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public virtual Constant ConvertImplicitly (TypeSpec type)
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{
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if (this.type == type)
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return this;
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if (!Convert.ImplicitNumericConversionExists (this.type, type))
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return null;
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bool fail;
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object constant_value = ChangeType (GetValue (), type, out fail);
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if (fail){
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//
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// We should always catch the error before this is ever
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// reached, by calling Convert.ImplicitStandardConversionExists
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//
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throw new InternalErrorException ("Missing constant conversion between `{0}' and `{1}'",
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Type.GetSignatureForError (), type.GetSignatureForError ());
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}
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return CreateConstantFromValue (type, constant_value, loc);
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}
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//
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// Returns a constant instance based on Type
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//
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public static Constant CreateConstantFromValue (TypeSpec t, object v, Location loc)
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{
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switch (t.BuiltinType) {
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case BuiltinTypeSpec.Type.Int:
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return new IntConstant (t, (int) v, loc);
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case BuiltinTypeSpec.Type.String:
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return new StringConstant (t, (string) v, loc);
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case BuiltinTypeSpec.Type.UInt:
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return new UIntConstant (t, (uint) v, loc);
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case BuiltinTypeSpec.Type.Long:
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return new LongConstant (t, (long) v, loc);
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case BuiltinTypeSpec.Type.ULong:
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return new ULongConstant (t, (ulong) v, loc);
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case BuiltinTypeSpec.Type.Float:
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return new FloatConstant (t, (float) v, loc);
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case BuiltinTypeSpec.Type.Double:
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return new DoubleConstant (t, (double) v, loc);
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case BuiltinTypeSpec.Type.Short:
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return new ShortConstant (t, (short) v, loc);
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case BuiltinTypeSpec.Type.UShort:
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return new UShortConstant (t, (ushort) v, loc);
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case BuiltinTypeSpec.Type.SByte:
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return new SByteConstant (t, (sbyte) v, loc);
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case BuiltinTypeSpec.Type.Byte:
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return new ByteConstant (t, (byte) v, loc);
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case BuiltinTypeSpec.Type.Char:
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return new CharConstant (t, (char) v, loc);
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case BuiltinTypeSpec.Type.Bool:
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return new BoolConstant (t, (bool) v, loc);
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case BuiltinTypeSpec.Type.Decimal:
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return new DecimalConstant (t, (decimal) v, loc);
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}
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if (t.IsEnum) {
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var real_type = EnumSpec.GetUnderlyingType (t);
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return new EnumConstant (CreateConstantFromValue (real_type, v, loc), t);
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}
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if (v == null) {
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if (t.IsNullableType)
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return Nullable.LiftedNull.Create (t, loc);
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if (TypeSpec.IsReferenceType (t))
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return new NullConstant (t, loc);
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}
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#if STATIC
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throw new InternalErrorException ("Constant value `{0}' has unexpected underlying type `{1}'", v, t.GetSignatureForError ());
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#else
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return null;
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#endif
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}
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//
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// Returns a constant instance based on value and type. This is probing version of
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// CreateConstantFromValue
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//
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public static Constant ExtractConstantFromValue (TypeSpec t, object v, Location loc)
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{
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switch (t.BuiltinType) {
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case BuiltinTypeSpec.Type.Int:
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if (v is int)
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return new IntConstant (t, (int) v, loc);
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break;
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case BuiltinTypeSpec.Type.String:
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if (v is string)
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return new StringConstant (t, (string) v, loc);
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break;
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case BuiltinTypeSpec.Type.UInt:
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if (v is uint)
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return new UIntConstant (t, (uint) v, loc);
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break;
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case BuiltinTypeSpec.Type.Long:
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if (v is long)
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return new LongConstant (t, (long) v, loc);
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break;
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case BuiltinTypeSpec.Type.ULong:
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if (v is ulong)
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return new ULongConstant (t, (ulong) v, loc);
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break;
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case BuiltinTypeSpec.Type.Float:
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if (v is float)
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return new FloatConstant (t, (float) v, loc);
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break;
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case BuiltinTypeSpec.Type.Double:
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if (v is double)
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return new DoubleConstant (t, (double) v, loc);
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break;
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case BuiltinTypeSpec.Type.Short:
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if (v is short)
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return new ShortConstant (t, (short) v, loc);
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break;
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case BuiltinTypeSpec.Type.UShort:
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if (v is ushort)
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return new UShortConstant (t, (ushort) v, loc);
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break;
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case BuiltinTypeSpec.Type.SByte:
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if (v is sbyte)
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return new SByteConstant (t, (sbyte) v, loc);
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break;
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case BuiltinTypeSpec.Type.Byte:
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if (v is byte)
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return new ByteConstant (t, (byte) v, loc);
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break;
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case BuiltinTypeSpec.Type.Char:
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if (v is char)
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return new CharConstant (t, (char) v, loc);
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break;
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case BuiltinTypeSpec.Type.Bool:
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if (v is bool)
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return new BoolConstant (t, (bool) v, loc);
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break;
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case BuiltinTypeSpec.Type.Decimal:
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if (v is decimal)
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return new DecimalConstant (t, (decimal) v, loc);
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break;
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}
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if (t.IsEnum) {
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var real_type = EnumSpec.GetUnderlyingType (t);
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return new EnumConstant (CreateConstantFromValue (real_type, v, loc), t);
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}
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if (v == null) {
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if (t.IsNullableType)
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return Nullable.LiftedNull.Create (t, loc);
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if (TypeSpec.IsReferenceType (t))
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return new NullConstant (t, loc);
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}
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return null;
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}
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public override Expression CreateExpressionTree (ResolveContext ec)
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{
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Arguments args = new Arguments (2);
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args.Add (new Argument (this));
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args.Add (new Argument (new TypeOf (type, loc)));
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return CreateExpressionFactoryCall (ec, "Constant", args);
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}
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/// <summary>
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/// Maybe ConvertTo name is better. It tries to convert `this' constant to target_type.
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/// It throws OverflowException
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/// </summary>
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// DON'T CALL THIS METHOD DIRECTLY AS IT DOES NOT HANDLE ENUMS
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public abstract Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type);
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// This is a custom version of Convert.ChangeType() which works
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// with the TypeBuilder defined types when compiling corlib.
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static object ChangeType (object value, TypeSpec targetType, out bool error)
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{
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IConvertible convert_value = value as IConvertible;
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if (convert_value == null) {
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error = true;
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return null;
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}
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//
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// We cannot rely on build-in type conversions as they are
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// more limited than what C# supports.
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// See char -> float/decimal/double conversion
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//
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error = false;
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try {
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switch (targetType.BuiltinType) {
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case BuiltinTypeSpec.Type.Bool:
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return convert_value.ToBoolean (nfi);
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case BuiltinTypeSpec.Type.Byte:
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return convert_value.ToByte (nfi);
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case BuiltinTypeSpec.Type.Char:
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return convert_value.ToChar (nfi);
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case BuiltinTypeSpec.Type.Short:
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return convert_value.ToInt16 (nfi);
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case BuiltinTypeSpec.Type.Int:
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return convert_value.ToInt32 (nfi);
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case BuiltinTypeSpec.Type.Long:
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return convert_value.ToInt64 (nfi);
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case BuiltinTypeSpec.Type.SByte:
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return convert_value.ToSByte (nfi);
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case BuiltinTypeSpec.Type.Decimal:
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if (convert_value.GetType () == typeof (char))
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return (decimal) convert_value.ToInt32 (nfi);
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return convert_value.ToDecimal (nfi);
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case BuiltinTypeSpec.Type.Double:
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if (convert_value.GetType () == typeof (char))
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return (double) convert_value.ToInt32 (nfi);
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return convert_value.ToDouble (nfi);
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case BuiltinTypeSpec.Type.Float:
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if (convert_value.GetType () == typeof (char))
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return (float) convert_value.ToInt32 (nfi);
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return convert_value.ToSingle (nfi);
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case BuiltinTypeSpec.Type.String:
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return convert_value.ToString (nfi);
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case BuiltinTypeSpec.Type.UShort:
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return convert_value.ToUInt16 (nfi);
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case BuiltinTypeSpec.Type.UInt:
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return convert_value.ToUInt32 (nfi);
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case BuiltinTypeSpec.Type.ULong:
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return convert_value.ToUInt64 (nfi);
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case BuiltinTypeSpec.Type.Object:
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return value;
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}
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} catch {
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}
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error = true;
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return null;
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}
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protected override Expression DoResolve (ResolveContext rc)
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{
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return this;
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}
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//
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// Attempts to do a compile-time folding of a constant cast and handles
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// error reporting for constant overlows only, on normal conversion
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// errors returns null
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//
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public Constant Reduce (ResolveContext ec, TypeSpec target_type)
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{
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try {
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return TryReduceConstant (ec, target_type);
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} catch (OverflowException) {
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if (ec.ConstantCheckState && Type.BuiltinType != BuiltinTypeSpec.Type.Decimal) {
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ec.Report.Error (221, loc,
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"Constant value `{0}' cannot be converted to a `{1}' (use `unchecked' syntax to override)",
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GetValueAsLiteral (), target_type.GetSignatureForError ());
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} else {
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Error_ValueCannotBeConverted (ec, target_type, false);
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}
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return New.Constantify (target_type, loc);
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}
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}
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public Constant TryReduce (ResolveContext rc, TypeSpec targetType)
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{
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try {
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return TryReduceConstant (rc, targetType);
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} catch (OverflowException) {
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return null;
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}
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}
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Constant TryReduceConstant (ResolveContext ec, TypeSpec target_type)
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{
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if (Type == target_type) {
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//
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// Reducing literal value produces a new constant. Syntactically 10 is not same as (int)10
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//
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if (IsLiteral)
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return CreateConstantFromValue (target_type, GetValue (), loc);
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return this;
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}
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Constant c;
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if (target_type.IsEnum) {
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c = TryReduceConstant (ec, EnumSpec.GetUnderlyingType (target_type));
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if (c == null)
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return null;
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return new EnumConstant (c, target_type);
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}
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return ConvertExplicitly (ec.ConstantCheckState, target_type);
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}
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/// <summary>
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/// Need to pass type as the constant can require a boxing
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/// and in such case no optimization is possible
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/// </summary>
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public bool IsDefaultInitializer (TypeSpec type)
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{
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if (type == Type)
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return IsDefaultValue;
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return this is NullLiteral;
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}
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public abstract bool IsDefaultValue {
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get;
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}
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public abstract bool IsNegative {
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get;
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}
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//
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// When constant is declared as literal
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//
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public virtual bool IsLiteral {
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get { return false; }
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}
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public virtual bool IsOneInteger {
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get { return false; }
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}
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public override bool IsSideEffectFree {
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get {
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return true;
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}
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}
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//
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// Returns true iff 1) the stack type of this is one of Object,
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// int32, int64 and 2) this == 0 or this == null.
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//
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public virtual bool IsZeroInteger {
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get { return false; }
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}
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public override void EmitSideEffect (EmitContext ec)
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{
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// do nothing
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}
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public sealed override Expression Clone (CloneContext clonectx)
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{
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// No cloning is not needed for constants
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return this;
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}
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protected override void CloneTo (CloneContext clonectx, Expression target)
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{
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throw new NotSupportedException ("should not be reached");
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}
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public override System.Linq.Expressions.Expression MakeExpression (BuilderContext ctx)
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{
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#if STATIC
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return base.MakeExpression (ctx);
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#else
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return System.Linq.Expressions.Expression.Constant (GetTypedValue (), type.GetMetaInfo ());
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#endif
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}
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public new bool Resolve (ResolveContext rc)
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{
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// It exists only as hint not to call Resolve on constants
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return true;
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}
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}
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public abstract class IntegralConstant : Constant
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{
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protected IntegralConstant (TypeSpec type, Location loc)
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: base (loc)
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{
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this.type = type;
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eclass = ExprClass.Value;
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}
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public override void Error_ValueCannotBeConverted (ResolveContext ec, TypeSpec target, bool expl)
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{
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try {
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ConvertExplicitly (true, target);
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base.Error_ValueCannotBeConverted (ec, target, expl);
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}
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catch
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{
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ec.Report.Error (31, loc, "Constant value `{0}' cannot be converted to a `{1}'",
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GetValueAsLiteral (), target.GetSignatureForError ());
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}
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}
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public override string GetValueAsLiteral ()
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{
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return GetValue ().ToString ();
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}
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public abstract Constant Increment ();
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}
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public class BoolConstant : Constant {
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public readonly bool Value;
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public BoolConstant (BuiltinTypes types, bool val, Location loc)
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: this (types.Bool, val, loc)
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{
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}
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public BoolConstant (TypeSpec type, bool val, Location loc)
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: base (loc)
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{
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eclass = ExprClass.Value;
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this.type = type;
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Value = val;
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}
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public override object GetValue ()
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{
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return (object) Value;
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}
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public override string GetValueAsLiteral ()
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{
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return Value ? "true" : "false";
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}
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public override long GetValueAsLong ()
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{
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return Value ? 1 : 0;
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}
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public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType, TypeSpec parameterType)
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{
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enc.Encode (Value);
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}
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public override void Emit (EmitContext ec)
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{
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if (Value)
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ec.EmitInt (1);
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else
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ec.EmitInt (0);
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}
|
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public override bool IsDefaultValue {
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get {
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return !Value;
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}
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}
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public override bool IsNegative {
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get {
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return false;
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}
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}
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|
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public override bool IsZeroInteger {
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get { return Value == false; }
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}
|
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|
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public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
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{
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return null;
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}
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}
|
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|
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public class ByteConstant : IntegralConstant
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{
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public readonly byte Value;
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|
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public ByteConstant (BuiltinTypes types, byte v, Location loc)
|
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: this (types.Byte, v, loc)
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{
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}
|
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|
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public ByteConstant (TypeSpec type, byte v, Location loc)
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: base (type, loc)
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{
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Value = v;
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}
|
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|
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public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType, TypeSpec parameterType)
|
|
{
|
|
enc.Encode (Value);
|
|
}
|
|
|
|
public override void Emit (EmitContext ec)
|
|
{
|
|
ec.EmitInt (Value);
|
|
}
|
|
|
|
public override object GetValue ()
|
|
{
|
|
return Value;
|
|
}
|
|
|
|
public override long GetValueAsLong ()
|
|
{
|
|
return Value;
|
|
}
|
|
|
|
public override Constant Increment ()
|
|
{
|
|
return new ByteConstant (type, checked ((byte)(Value + 1)), loc);
|
|
}
|
|
|
|
public override bool IsDefaultValue {
|
|
get {
|
|
return Value == 0;
|
|
}
|
|
}
|
|
|
|
public override bool IsOneInteger {
|
|
get {
|
|
return Value == 1;
|
|
}
|
|
}
|
|
|
|
public override bool IsNegative {
|
|
get {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public override bool IsZeroInteger {
|
|
get { return Value == 0; }
|
|
}
|
|
|
|
public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
|
|
{
|
|
switch (target_type.BuiltinType) {
|
|
case BuiltinTypeSpec.Type.SByte:
|
|
if (in_checked_context){
|
|
if (Value > SByte.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new SByteConstant (target_type, (sbyte) Value, Location);
|
|
case BuiltinTypeSpec.Type.Short:
|
|
return new ShortConstant (target_type, (short) Value, Location);
|
|
case BuiltinTypeSpec.Type.UShort:
|
|
return new UShortConstant (target_type, (ushort) Value, Location);
|
|
case BuiltinTypeSpec.Type.Int:
|
|
return new IntConstant (target_type, (int) Value, Location);
|
|
case BuiltinTypeSpec.Type.UInt:
|
|
return new UIntConstant (target_type, (uint) Value, Location);
|
|
case BuiltinTypeSpec.Type.Long:
|
|
return new LongConstant (target_type, (long) Value, Location);
|
|
case BuiltinTypeSpec.Type.ULong:
|
|
return new ULongConstant (target_type, (ulong) Value, Location);
|
|
case BuiltinTypeSpec.Type.Float:
|
|
return new FloatConstant (target_type, (float) Value, Location);
|
|
case BuiltinTypeSpec.Type.Double:
|
|
return new DoubleConstant (target_type, (double) Value, Location);
|
|
case BuiltinTypeSpec.Type.Char:
|
|
return new CharConstant (target_type, (char) Value, Location);
|
|
case BuiltinTypeSpec.Type.Decimal:
|
|
return new DecimalConstant (target_type, (decimal) Value, Location);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
}
|
|
|
|
public class CharConstant : Constant {
|
|
public readonly char Value;
|
|
|
|
public CharConstant (BuiltinTypes types, char v, Location loc)
|
|
: this (types.Char, v, loc)
|
|
{
|
|
}
|
|
|
|
public CharConstant (TypeSpec type, char v, Location loc)
|
|
: base (loc)
|
|
{
|
|
this.type = type;
|
|
eclass = ExprClass.Value;
|
|
|
|
Value = v;
|
|
}
|
|
|
|
public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType, TypeSpec parameterType)
|
|
{
|
|
enc.Encode ((ushort) Value);
|
|
}
|
|
|
|
public override void Emit (EmitContext ec)
|
|
{
|
|
ec.EmitInt (Value);
|
|
}
|
|
|
|
static string descape (char c)
|
|
{
|
|
switch (c){
|
|
case '\a':
|
|
return "\\a";
|
|
case '\b':
|
|
return "\\b";
|
|
case '\n':
|
|
return "\\n";
|
|
case '\t':
|
|
return "\\t";
|
|
case '\v':
|
|
return "\\v";
|
|
case '\r':
|
|
return "\\r";
|
|
case '\\':
|
|
return "\\\\";
|
|
case '\f':
|
|
return "\\f";
|
|
case '\0':
|
|
return "\\0";
|
|
case '"':
|
|
return "\\\"";
|
|
case '\'':
|
|
return "\\\'";
|
|
}
|
|
return c.ToString ();
|
|
}
|
|
|
|
public override object GetValue ()
|
|
{
|
|
return Value;
|
|
}
|
|
|
|
public override long GetValueAsLong ()
|
|
{
|
|
return Value;
|
|
}
|
|
|
|
public override string GetValueAsLiteral ()
|
|
{
|
|
return "\"" + descape (Value) + "\"";
|
|
}
|
|
|
|
public override bool IsDefaultValue {
|
|
get {
|
|
return Value == 0;
|
|
}
|
|
}
|
|
|
|
public override bool IsNegative {
|
|
get {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public override bool IsZeroInteger {
|
|
get { return Value == '\0'; }
|
|
}
|
|
|
|
public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
|
|
{
|
|
switch (target_type.BuiltinType) {
|
|
case BuiltinTypeSpec.Type.Byte:
|
|
if (in_checked_context) {
|
|
if (Value < Byte.MinValue || Value > Byte.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new ByteConstant (target_type, (byte) Value, Location);
|
|
case BuiltinTypeSpec.Type.SByte:
|
|
if (in_checked_context) {
|
|
if (Value > SByte.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new SByteConstant (target_type, (sbyte) Value, Location);
|
|
|
|
case BuiltinTypeSpec.Type.Short:
|
|
if (in_checked_context) {
|
|
if (Value > Int16.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new ShortConstant (target_type, (short) Value, Location);
|
|
case BuiltinTypeSpec.Type.Int:
|
|
return new IntConstant (target_type, (int) Value, Location);
|
|
case BuiltinTypeSpec.Type.UInt:
|
|
return new UIntConstant (target_type, (uint) Value, Location);
|
|
case BuiltinTypeSpec.Type.Long:
|
|
return new LongConstant (target_type, (long) Value, Location);
|
|
case BuiltinTypeSpec.Type.ULong:
|
|
return new ULongConstant (target_type, (ulong) Value, Location);
|
|
case BuiltinTypeSpec.Type.Float:
|
|
return new FloatConstant (target_type, (float) Value, Location);
|
|
case BuiltinTypeSpec.Type.Double:
|
|
return new DoubleConstant (target_type, (double) Value, Location);
|
|
case BuiltinTypeSpec.Type.Decimal:
|
|
return new DecimalConstant (target_type, (decimal) Value, Location);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
}
|
|
|
|
public class SByteConstant : IntegralConstant
|
|
{
|
|
public readonly sbyte Value;
|
|
|
|
public SByteConstant (BuiltinTypes types, sbyte v, Location loc)
|
|
: this (types.SByte, v, loc)
|
|
{
|
|
}
|
|
|
|
public SByteConstant (TypeSpec type, sbyte v, Location loc)
|
|
: base (type, loc)
|
|
{
|
|
Value = v;
|
|
}
|
|
|
|
public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType, TypeSpec parameterType)
|
|
{
|
|
enc.Encode (Value);
|
|
}
|
|
|
|
public override void Emit (EmitContext ec)
|
|
{
|
|
ec.EmitInt (Value);
|
|
}
|
|
|
|
public override object GetValue ()
|
|
{
|
|
return Value;
|
|
}
|
|
|
|
public override long GetValueAsLong ()
|
|
{
|
|
return Value;
|
|
}
|
|
|
|
public override Constant Increment ()
|
|
{
|
|
return new SByteConstant (type, checked((sbyte)(Value + 1)), loc);
|
|
}
|
|
|
|
public override bool IsDefaultValue {
|
|
get {
|
|
return Value == 0;
|
|
}
|
|
}
|
|
|
|
public override bool IsNegative {
|
|
get {
|
|
return Value < 0;
|
|
}
|
|
}
|
|
|
|
public override bool IsOneInteger {
|
|
get {
|
|
return Value == 1;
|
|
}
|
|
}
|
|
|
|
public override bool IsZeroInteger {
|
|
get { return Value == 0; }
|
|
}
|
|
|
|
public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
|
|
{
|
|
switch (target_type.BuiltinType) {
|
|
case BuiltinTypeSpec.Type.Byte:
|
|
if (in_checked_context && Value < 0)
|
|
throw new OverflowException ();
|
|
return new ByteConstant (target_type, (byte) Value, Location);
|
|
case BuiltinTypeSpec.Type.Short:
|
|
return new ShortConstant (target_type, (short) Value, Location);
|
|
case BuiltinTypeSpec.Type.UShort:
|
|
if (in_checked_context && Value < 0)
|
|
throw new OverflowException ();
|
|
return new UShortConstant (target_type, (ushort) Value, Location);
|
|
case BuiltinTypeSpec.Type.Int:
|
|
return new IntConstant (target_type, (int) Value, Location);
|
|
case BuiltinTypeSpec.Type.UInt:
|
|
if (in_checked_context && Value < 0)
|
|
throw new OverflowException ();
|
|
return new UIntConstant (target_type, (uint) Value, Location);
|
|
case BuiltinTypeSpec.Type.Long:
|
|
return new LongConstant (target_type, (long) Value, Location);
|
|
case BuiltinTypeSpec.Type.ULong:
|
|
if (in_checked_context && Value < 0)
|
|
throw new OverflowException ();
|
|
return new ULongConstant (target_type, (ulong) Value, Location);
|
|
case BuiltinTypeSpec.Type.Float:
|
|
return new FloatConstant (target_type, (float) Value, Location);
|
|
case BuiltinTypeSpec.Type.Double:
|
|
return new DoubleConstant (target_type, (double) Value, Location);
|
|
case BuiltinTypeSpec.Type.Char:
|
|
if (in_checked_context && Value < 0)
|
|
throw new OverflowException ();
|
|
return new CharConstant (target_type, (char) Value, Location);
|
|
case BuiltinTypeSpec.Type.Decimal:
|
|
return new DecimalConstant (target_type, (decimal) Value, Location);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
}
|
|
|
|
public class ShortConstant : IntegralConstant {
|
|
public readonly short Value;
|
|
|
|
public ShortConstant (BuiltinTypes types, short v, Location loc)
|
|
: this (types.Short, v, loc)
|
|
{
|
|
}
|
|
|
|
public ShortConstant (TypeSpec type, short v, Location loc)
|
|
: base (type, loc)
|
|
{
|
|
Value = v;
|
|
}
|
|
|
|
public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType, TypeSpec parameterType)
|
|
{
|
|
enc.Encode (Value);
|
|
}
|
|
|
|
public override void Emit (EmitContext ec)
|
|
{
|
|
ec.EmitInt (Value);
|
|
}
|
|
|
|
public override object GetValue ()
|
|
{
|
|
return Value;
|
|
}
|
|
|
|
public override long GetValueAsLong ()
|
|
{
|
|
return Value;
|
|
}
|
|
|
|
public override Constant Increment ()
|
|
{
|
|
return new ShortConstant (type, checked((short)(Value + 1)), loc);
|
|
}
|
|
|
|
public override bool IsDefaultValue {
|
|
get {
|
|
return Value == 0;
|
|
}
|
|
}
|
|
|
|
public override bool IsZeroInteger {
|
|
get { return Value == 0; }
|
|
}
|
|
|
|
public override bool IsNegative {
|
|
get {
|
|
return Value < 0;
|
|
}
|
|
}
|
|
|
|
public override bool IsOneInteger {
|
|
get {
|
|
return Value == 1;
|
|
}
|
|
}
|
|
|
|
public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
|
|
{
|
|
switch (target_type.BuiltinType) {
|
|
case BuiltinTypeSpec.Type.Byte:
|
|
if (in_checked_context) {
|
|
if (Value < Byte.MinValue || Value > Byte.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new ByteConstant (target_type, (byte) Value, Location);
|
|
case BuiltinTypeSpec.Type.SByte:
|
|
if (in_checked_context) {
|
|
if (Value < SByte.MinValue || Value > SByte.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new SByteConstant (target_type, (sbyte) Value, Location);
|
|
case BuiltinTypeSpec.Type.UShort:
|
|
if (in_checked_context && Value < 0)
|
|
throw new OverflowException ();
|
|
|
|
return new UShortConstant (target_type, (ushort) Value, Location);
|
|
case BuiltinTypeSpec.Type.Int:
|
|
return new IntConstant (target_type, (int) Value, Location);
|
|
case BuiltinTypeSpec.Type.UInt:
|
|
if (in_checked_context && Value < 0)
|
|
throw new OverflowException ();
|
|
return new UIntConstant (target_type, (uint) Value, Location);
|
|
case BuiltinTypeSpec.Type.Long:
|
|
return new LongConstant (target_type, (long) Value, Location);
|
|
case BuiltinTypeSpec.Type.ULong:
|
|
if (in_checked_context && Value < 0)
|
|
throw new OverflowException ();
|
|
return new ULongConstant (target_type, (ulong) Value, Location);
|
|
case BuiltinTypeSpec.Type.Float:
|
|
return new FloatConstant (target_type, (float) Value, Location);
|
|
case BuiltinTypeSpec.Type.Double:
|
|
return new DoubleConstant (target_type, (double) Value, Location);
|
|
case BuiltinTypeSpec.Type.Char:
|
|
if (in_checked_context) {
|
|
if (Value < Char.MinValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new CharConstant (target_type, (char) Value, Location);
|
|
case BuiltinTypeSpec.Type.Decimal:
|
|
return new DecimalConstant (target_type, (decimal) Value, Location);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
}
|
|
|
|
public class UShortConstant : IntegralConstant
|
|
{
|
|
public readonly ushort Value;
|
|
|
|
public UShortConstant (BuiltinTypes types, ushort v, Location loc)
|
|
: this (types.UShort, v, loc)
|
|
{
|
|
}
|
|
|
|
public UShortConstant (TypeSpec type, ushort v, Location loc)
|
|
: base (type, loc)
|
|
{
|
|
Value = v;
|
|
}
|
|
|
|
public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType, TypeSpec parameterType)
|
|
{
|
|
enc.Encode (Value);
|
|
}
|
|
|
|
public override void Emit (EmitContext ec)
|
|
{
|
|
ec.EmitInt (Value);
|
|
}
|
|
|
|
public override object GetValue ()
|
|
{
|
|
return Value;
|
|
}
|
|
|
|
public override long GetValueAsLong ()
|
|
{
|
|
return Value;
|
|
}
|
|
|
|
public override Constant Increment ()
|
|
{
|
|
return new UShortConstant (type, checked((ushort)(Value + 1)), loc);
|
|
}
|
|
|
|
public override bool IsDefaultValue {
|
|
get {
|
|
return Value == 0;
|
|
}
|
|
}
|
|
|
|
public override bool IsNegative {
|
|
get {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public override bool IsOneInteger {
|
|
get {
|
|
return Value == 1;
|
|
}
|
|
}
|
|
|
|
public override bool IsZeroInteger {
|
|
get { return Value == 0; }
|
|
}
|
|
|
|
public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
|
|
{
|
|
switch (target_type.BuiltinType) {
|
|
case BuiltinTypeSpec.Type.Byte:
|
|
if (in_checked_context) {
|
|
if (Value > Byte.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new ByteConstant (target_type, (byte) Value, Location);
|
|
case BuiltinTypeSpec.Type.SByte:
|
|
if (in_checked_context) {
|
|
if (Value > SByte.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new SByteConstant (target_type, (sbyte) Value, Location);
|
|
case BuiltinTypeSpec.Type.Short:
|
|
if (in_checked_context) {
|
|
if (Value > Int16.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new ShortConstant (target_type, (short) Value, Location);
|
|
case BuiltinTypeSpec.Type.Int:
|
|
return new IntConstant (target_type, (int) Value, Location);
|
|
case BuiltinTypeSpec.Type.UInt:
|
|
return new UIntConstant (target_type, (uint) Value, Location);
|
|
case BuiltinTypeSpec.Type.Long:
|
|
return new LongConstant (target_type, (long) Value, Location);
|
|
case BuiltinTypeSpec.Type.ULong:
|
|
return new ULongConstant (target_type, (ulong) Value, Location);
|
|
case BuiltinTypeSpec.Type.Float:
|
|
return new FloatConstant (target_type, (float) Value, Location);
|
|
case BuiltinTypeSpec.Type.Double:
|
|
return new DoubleConstant (target_type, (double) Value, Location);
|
|
case BuiltinTypeSpec.Type.Char:
|
|
if (in_checked_context) {
|
|
if (Value > Char.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new CharConstant (target_type, (char) Value, Location);
|
|
case BuiltinTypeSpec.Type.Decimal:
|
|
return new DecimalConstant (target_type, (decimal) Value, Location);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
}
|
|
|
|
public class IntConstant : IntegralConstant
|
|
{
|
|
public readonly int Value;
|
|
|
|
public IntConstant (BuiltinTypes types, int v, Location loc)
|
|
: this (types.Int, v, loc)
|
|
{
|
|
}
|
|
|
|
public IntConstant (TypeSpec type, int v, Location loc)
|
|
: base (type, loc)
|
|
{
|
|
Value = v;
|
|
}
|
|
|
|
public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType, TypeSpec parameterType)
|
|
{
|
|
enc.Encode (Value);
|
|
}
|
|
|
|
public override void Emit (EmitContext ec)
|
|
{
|
|
ec.EmitInt (Value);
|
|
}
|
|
|
|
public override object GetValue ()
|
|
{
|
|
return Value;
|
|
}
|
|
|
|
public override long GetValueAsLong ()
|
|
{
|
|
return Value;
|
|
}
|
|
|
|
public override Constant Increment ()
|
|
{
|
|
return new IntConstant (type, checked(Value + 1), loc);
|
|
}
|
|
|
|
public override bool IsDefaultValue {
|
|
get {
|
|
return Value == 0;
|
|
}
|
|
}
|
|
|
|
public override bool IsNegative {
|
|
get {
|
|
return Value < 0;
|
|
}
|
|
}
|
|
|
|
public override bool IsOneInteger {
|
|
get {
|
|
return Value == 1;
|
|
}
|
|
}
|
|
|
|
public override bool IsZeroInteger {
|
|
get { return Value == 0; }
|
|
}
|
|
|
|
public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
|
|
{
|
|
switch (target_type.BuiltinType) {
|
|
case BuiltinTypeSpec.Type.Byte:
|
|
if (in_checked_context) {
|
|
if (Value < Byte.MinValue || Value > Byte.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new ByteConstant (target_type, (byte) Value, Location);
|
|
case BuiltinTypeSpec.Type.SByte:
|
|
if (in_checked_context) {
|
|
if (Value < SByte.MinValue || Value > SByte.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new SByteConstant (target_type, (sbyte) Value, Location);
|
|
case BuiltinTypeSpec.Type.Short:
|
|
if (in_checked_context) {
|
|
if (Value < Int16.MinValue || Value > Int16.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new ShortConstant (target_type, (short) Value, Location);
|
|
case BuiltinTypeSpec.Type.UShort:
|
|
if (in_checked_context) {
|
|
if (Value < UInt16.MinValue || Value > UInt16.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new UShortConstant (target_type, (ushort) Value, Location);
|
|
case BuiltinTypeSpec.Type.UInt:
|
|
if (in_checked_context) {
|
|
if (Value < UInt32.MinValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new UIntConstant (target_type, (uint) Value, Location);
|
|
case BuiltinTypeSpec.Type.Long:
|
|
return new LongConstant (target_type, (long) Value, Location);
|
|
case BuiltinTypeSpec.Type.ULong:
|
|
if (in_checked_context && Value < 0)
|
|
throw new OverflowException ();
|
|
return new ULongConstant (target_type, (ulong) Value, Location);
|
|
case BuiltinTypeSpec.Type.Float:
|
|
return new FloatConstant (target_type, (float) Value, Location);
|
|
case BuiltinTypeSpec.Type.Double:
|
|
return new DoubleConstant (target_type, (double) Value, Location);
|
|
case BuiltinTypeSpec.Type.Char:
|
|
if (in_checked_context) {
|
|
if (Value < Char.MinValue || Value > Char.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new CharConstant (target_type, (char) Value, Location);
|
|
case BuiltinTypeSpec.Type.Decimal:
|
|
return new DecimalConstant (target_type, (decimal) Value, Location);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
public override Constant ConvertImplicitly (TypeSpec type)
|
|
{
|
|
if (this.type == type)
|
|
return this;
|
|
|
|
Constant c = TryImplicitIntConversion (type);
|
|
if (c != null)
|
|
return c; //.Resolve (rc);
|
|
|
|
return base.ConvertImplicitly (type);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Attempts to perform an implicit constant conversion of the IntConstant
|
|
/// into a different data type using casts (See Implicit Constant
|
|
/// Expression Conversions)
|
|
/// </summary>
|
|
Constant TryImplicitIntConversion (TypeSpec target_type)
|
|
{
|
|
switch (target_type.BuiltinType) {
|
|
case BuiltinTypeSpec.Type.SByte:
|
|
if (Value >= SByte.MinValue && Value <= SByte.MaxValue)
|
|
return new SByteConstant (target_type, (sbyte) Value, loc);
|
|
break;
|
|
case BuiltinTypeSpec.Type.Byte:
|
|
if (Value >= Byte.MinValue && Value <= Byte.MaxValue)
|
|
return new ByteConstant (target_type, (byte) Value, loc);
|
|
break;
|
|
case BuiltinTypeSpec.Type.Short:
|
|
if (Value >= Int16.MinValue && Value <= Int16.MaxValue)
|
|
return new ShortConstant (target_type, (short) Value, loc);
|
|
break;
|
|
case BuiltinTypeSpec.Type.UShort:
|
|
if (Value >= UInt16.MinValue && Value <= UInt16.MaxValue)
|
|
return new UShortConstant (target_type, (ushort) Value, loc);
|
|
break;
|
|
case BuiltinTypeSpec.Type.UInt:
|
|
if (Value >= 0)
|
|
return new UIntConstant (target_type, (uint) Value, loc);
|
|
break;
|
|
case BuiltinTypeSpec.Type.ULong:
|
|
//
|
|
// we can optimize this case: a positive int32
|
|
// always fits on a uint64. But we need an opcode
|
|
// to do it.
|
|
//
|
|
if (Value >= 0)
|
|
return new ULongConstant (target_type, (ulong) Value, loc);
|
|
break;
|
|
case BuiltinTypeSpec.Type.Double:
|
|
return new DoubleConstant (target_type, (double) Value, loc);
|
|
case BuiltinTypeSpec.Type.Float:
|
|
return new FloatConstant (target_type, (float) Value, loc);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
}
|
|
|
|
public class UIntConstant : IntegralConstant {
|
|
public readonly uint Value;
|
|
|
|
public UIntConstant (BuiltinTypes types, uint v, Location loc)
|
|
: this (types.UInt, v, loc)
|
|
{
|
|
}
|
|
|
|
public UIntConstant (TypeSpec type, uint v, Location loc)
|
|
: base (type, loc)
|
|
{
|
|
Value = v;
|
|
}
|
|
|
|
public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType, TypeSpec parameterType)
|
|
{
|
|
enc.Encode (Value);
|
|
}
|
|
|
|
public override void Emit (EmitContext ec)
|
|
{
|
|
ec.EmitInt (unchecked ((int) Value));
|
|
}
|
|
|
|
public override object GetValue ()
|
|
{
|
|
return Value;
|
|
}
|
|
|
|
public override long GetValueAsLong ()
|
|
{
|
|
return Value;
|
|
}
|
|
|
|
public override Constant Increment ()
|
|
{
|
|
return new UIntConstant (type, checked(Value + 1), loc);
|
|
}
|
|
|
|
public override bool IsDefaultValue {
|
|
get {
|
|
return Value == 0;
|
|
}
|
|
}
|
|
|
|
public override bool IsNegative {
|
|
get {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public override bool IsOneInteger {
|
|
get {
|
|
return Value == 1;
|
|
}
|
|
}
|
|
|
|
public override bool IsZeroInteger {
|
|
get { return Value == 0; }
|
|
}
|
|
|
|
public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
|
|
{
|
|
switch (target_type.BuiltinType) {
|
|
case BuiltinTypeSpec.Type.Byte:
|
|
if (in_checked_context) {
|
|
if (Value < 0 || Value > byte.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new ByteConstant (target_type, (byte) Value, Location);
|
|
case BuiltinTypeSpec.Type.SByte:
|
|
if (in_checked_context) {
|
|
if (Value > SByte.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new SByteConstant (target_type, (sbyte) Value, Location);
|
|
case BuiltinTypeSpec.Type.Short:
|
|
if (in_checked_context) {
|
|
if (Value > Int16.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new ShortConstant (target_type, (short) Value, Location);
|
|
case BuiltinTypeSpec.Type.UShort:
|
|
if (in_checked_context) {
|
|
if (Value < UInt16.MinValue || Value > UInt16.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new UShortConstant (target_type, (ushort) Value, Location);
|
|
case BuiltinTypeSpec.Type.Int:
|
|
if (in_checked_context) {
|
|
if (Value > Int32.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new IntConstant (target_type, (int) Value, Location);
|
|
case BuiltinTypeSpec.Type.Long:
|
|
return new LongConstant (target_type, (long) Value, Location);
|
|
case BuiltinTypeSpec.Type.ULong:
|
|
return new ULongConstant (target_type, (ulong) Value, Location);
|
|
case BuiltinTypeSpec.Type.Float:
|
|
return new FloatConstant (target_type, (float) Value, Location);
|
|
case BuiltinTypeSpec.Type.Double:
|
|
return new DoubleConstant (target_type, (double) Value, Location);
|
|
case BuiltinTypeSpec.Type.Char:
|
|
if (in_checked_context) {
|
|
if (Value < Char.MinValue || Value > Char.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new CharConstant (target_type, (char) Value, Location);
|
|
case BuiltinTypeSpec.Type.Decimal:
|
|
return new DecimalConstant (target_type, (decimal) Value, Location);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
}
|
|
|
|
public class LongConstant : IntegralConstant {
|
|
public readonly long Value;
|
|
|
|
public LongConstant (BuiltinTypes types, long v, Location loc)
|
|
: this (types.Long, v, loc)
|
|
{
|
|
}
|
|
|
|
public LongConstant (TypeSpec type, long v, Location loc)
|
|
: base (type, loc)
|
|
{
|
|
Value = v;
|
|
}
|
|
|
|
public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType, TypeSpec parameterType)
|
|
{
|
|
enc.Encode (Value);
|
|
}
|
|
|
|
public override void Emit (EmitContext ec)
|
|
{
|
|
ec.EmitLong (Value);
|
|
}
|
|
|
|
public override object GetValue ()
|
|
{
|
|
return Value;
|
|
}
|
|
|
|
public override long GetValueAsLong ()
|
|
{
|
|
return Value;
|
|
}
|
|
|
|
public override Constant Increment ()
|
|
{
|
|
return new LongConstant (type, checked(Value + 1), loc);
|
|
}
|
|
|
|
public override bool IsDefaultValue {
|
|
get {
|
|
return Value == 0;
|
|
}
|
|
}
|
|
|
|
public override bool IsNegative {
|
|
get {
|
|
return Value < 0;
|
|
}
|
|
}
|
|
|
|
public override bool IsOneInteger {
|
|
get {
|
|
return Value == 1;
|
|
}
|
|
}
|
|
|
|
public override bool IsZeroInteger {
|
|
get { return Value == 0; }
|
|
}
|
|
|
|
public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
|
|
{
|
|
switch (target_type.BuiltinType) {
|
|
case BuiltinTypeSpec.Type.Byte:
|
|
if (in_checked_context) {
|
|
if (Value < Byte.MinValue || Value > Byte.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new ByteConstant (target_type, (byte) Value, Location);
|
|
case BuiltinTypeSpec.Type.SByte:
|
|
if (in_checked_context) {
|
|
if (Value < SByte.MinValue || Value > SByte.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new SByteConstant (target_type, (sbyte) Value, Location);
|
|
case BuiltinTypeSpec.Type.Short:
|
|
if (in_checked_context) {
|
|
if (Value < Int16.MinValue || Value > Int16.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new ShortConstant (target_type, (short) Value, Location);
|
|
case BuiltinTypeSpec.Type.UShort:
|
|
if (in_checked_context) {
|
|
if (Value < UInt16.MinValue || Value > UInt16.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new UShortConstant (target_type, (ushort) Value, Location);
|
|
case BuiltinTypeSpec.Type.Int:
|
|
if (in_checked_context) {
|
|
if (Value < Int32.MinValue || Value > Int32.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new IntConstant (target_type, (int) Value, Location);
|
|
case BuiltinTypeSpec.Type.UInt:
|
|
if (in_checked_context) {
|
|
if (Value < UInt32.MinValue || Value > UInt32.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new UIntConstant (target_type, (uint) Value, Location);
|
|
case BuiltinTypeSpec.Type.ULong:
|
|
if (in_checked_context && Value < 0)
|
|
throw new OverflowException ();
|
|
return new ULongConstant (target_type, (ulong) Value, Location);
|
|
case BuiltinTypeSpec.Type.Float:
|
|
return new FloatConstant (target_type, (float) Value, Location);
|
|
case BuiltinTypeSpec.Type.Double:
|
|
return new DoubleConstant (target_type, (double) Value, Location);
|
|
case BuiltinTypeSpec.Type.Char:
|
|
if (in_checked_context) {
|
|
if (Value < Char.MinValue || Value > Char.MaxValue)
|
|
throw new OverflowException ();
|
|
}
|
|
return new CharConstant (target_type, (char) Value, Location);
|
|
case BuiltinTypeSpec.Type.Decimal:
|
|
return new DecimalConstant (target_type, (decimal) Value, Location);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
public override Constant ConvertImplicitly (TypeSpec type)
|
|
{
|
|
if (Value >= 0 && type.BuiltinType == BuiltinTypeSpec.Type.ULong) {
|
|
return new ULongConstant (type, (ulong) Value, loc);
|
|
}
|
|
|
|
return base.ConvertImplicitly (type);
|
|
}
|
|
}
|
|
|
|
public class ULongConstant : IntegralConstant {
|
|
public readonly ulong Value;
|
|
|
|
public ULongConstant (BuiltinTypes types, ulong v, Location loc)
|
|
: this (types.ULong, v, loc)
|
|
{
|
|
}
|
|
|
|
public ULongConstant (TypeSpec type, ulong v, Location loc)
|
|
: base (type, loc)
|
|
{
|
|
Value = v;
|
|
}
|
|
|
|
public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType, TypeSpec parameterType)
|
|
{
|
|
enc.Encode (Value);
|
|
}
|
|
|
|
public override void Emit (EmitContext ec)
|
|
{
|
|
ec.EmitLong (unchecked ((long) Value));
|
|
}
|
|
|
|
public override object GetValue ()
|
|
{
|
|
return Value;
|
|
}
|
|
|
|
public override long GetValueAsLong ()
|
|
{
|
|
return (long) Value;
|
|
}
|
|
|
|
public override Constant Increment ()
|
|
{
|
|
return new ULongConstant (type, checked(Value + 1), loc);
|
|
}
|
|
|
|
public override bool IsDefaultValue {
|
|
get {
|
|
return Value == 0;
|
|
}
|
|
}
|
|
|
|
public override bool IsNegative {
|
|
get {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public override bool IsOneInteger {
|
|
get {
|
|
return Value == 1;
|
|
}
|
|
}
|
|
|
|
public override bool IsZeroInteger {
|
|
get { return Value == 0; }
|
|
}
|
|
|
|
public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
|
|
{
|
|
switch (target_type.BuiltinType) {
|
|
case BuiltinTypeSpec.Type.Byte:
|
|
if (in_checked_context && Value > Byte.MaxValue)
|
|
throw new OverflowException ();
|
|
return new ByteConstant (target_type, (byte) Value, Location);
|
|
case BuiltinTypeSpec.Type.SByte:
|
|
if (in_checked_context && Value > ((ulong) SByte.MaxValue))
|
|
throw new OverflowException ();
|
|
return new SByteConstant (target_type, (sbyte) Value, Location);
|
|
case BuiltinTypeSpec.Type.Short:
|
|
if (in_checked_context && Value > ((ulong) Int16.MaxValue))
|
|
throw new OverflowException ();
|
|
return new ShortConstant (target_type, (short) Value, Location);
|
|
case BuiltinTypeSpec.Type.UShort:
|
|
if (in_checked_context && Value > UInt16.MaxValue)
|
|
throw new OverflowException ();
|
|
return new UShortConstant (target_type, (ushort) Value, Location);
|
|
case BuiltinTypeSpec.Type.Int:
|
|
if (in_checked_context && Value > UInt32.MaxValue)
|
|
throw new OverflowException ();
|
|
return new IntConstant (target_type, (int) Value, Location);
|
|
case BuiltinTypeSpec.Type.UInt:
|
|
if (in_checked_context && Value > UInt32.MaxValue)
|
|
throw new OverflowException ();
|
|
return new UIntConstant (target_type, (uint) Value, Location);
|
|
case BuiltinTypeSpec.Type.Long:
|
|
if (in_checked_context && Value > Int64.MaxValue)
|
|
throw new OverflowException ();
|
|
return new LongConstant (target_type, (long) Value, Location);
|
|
case BuiltinTypeSpec.Type.Float:
|
|
return new FloatConstant (target_type, (float) Value, Location);
|
|
case BuiltinTypeSpec.Type.Double:
|
|
return new DoubleConstant (target_type, (double) Value, Location);
|
|
case BuiltinTypeSpec.Type.Char:
|
|
if (in_checked_context && Value > Char.MaxValue)
|
|
throw new OverflowException ();
|
|
return new CharConstant (target_type, (char) Value, Location);
|
|
case BuiltinTypeSpec.Type.Decimal:
|
|
return new DecimalConstant (target_type, (decimal) Value, Location);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
}
|
|
|
|
public class FloatConstant : Constant {
|
|
//
|
|
// Store constant value as double because float constant operations
|
|
// need to work on double value to match JIT
|
|
//
|
|
public readonly double DoubleValue;
|
|
|
|
public FloatConstant (BuiltinTypes types, double v, Location loc)
|
|
: this (types.Float, v, loc)
|
|
{
|
|
}
|
|
|
|
public FloatConstant (TypeSpec type, double v, Location loc)
|
|
: base (loc)
|
|
{
|
|
this.type = type;
|
|
eclass = ExprClass.Value;
|
|
|
|
DoubleValue = v;
|
|
}
|
|
|
|
public override Constant ConvertImplicitly (TypeSpec type)
|
|
{
|
|
if (type.BuiltinType == BuiltinTypeSpec.Type.Double)
|
|
return new DoubleConstant (type, DoubleValue, loc);
|
|
|
|
return base.ConvertImplicitly (type);
|
|
}
|
|
|
|
public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType, TypeSpec parameterType)
|
|
{
|
|
enc.Encode (Value);
|
|
}
|
|
|
|
public override void Emit (EmitContext ec)
|
|
{
|
|
ec.Emit (OpCodes.Ldc_R4, Value);
|
|
}
|
|
|
|
public float Value {
|
|
get {
|
|
return (float) DoubleValue;
|
|
}
|
|
}
|
|
|
|
public override object GetValue ()
|
|
{
|
|
return Value;
|
|
}
|
|
|
|
public override string GetValueAsLiteral ()
|
|
{
|
|
return Value.ToString (CultureInfo.InvariantCulture);
|
|
}
|
|
|
|
public override long GetValueAsLong ()
|
|
{
|
|
throw new NotSupportedException ();
|
|
}
|
|
|
|
public override bool IsDefaultValue {
|
|
get {
|
|
return Value == 0;
|
|
}
|
|
}
|
|
|
|
public override bool IsNegative {
|
|
get {
|
|
return Value < 0;
|
|
}
|
|
}
|
|
|
|
public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
|
|
{
|
|
switch (target_type.BuiltinType) {
|
|
case BuiltinTypeSpec.Type.Byte:
|
|
if (in_checked_context) {
|
|
if (Value < byte.MinValue || Value > byte.MaxValue || float.IsNaN (Value))
|
|
throw new OverflowException ();
|
|
}
|
|
return new ByteConstant (target_type, (byte) DoubleValue, Location);
|
|
case BuiltinTypeSpec.Type.SByte:
|
|
if (in_checked_context) {
|
|
if (Value < sbyte.MinValue || Value > sbyte.MaxValue || float.IsNaN (Value))
|
|
throw new OverflowException ();
|
|
}
|
|
return new SByteConstant (target_type, (sbyte) DoubleValue, Location);
|
|
case BuiltinTypeSpec.Type.Short:
|
|
if (in_checked_context) {
|
|
if (Value < short.MinValue || Value > short.MaxValue || float.IsNaN (Value))
|
|
throw new OverflowException ();
|
|
}
|
|
return new ShortConstant (target_type, (short) DoubleValue, Location);
|
|
case BuiltinTypeSpec.Type.UShort:
|
|
if (in_checked_context) {
|
|
if (Value < ushort.MinValue || Value > ushort.MaxValue || float.IsNaN (Value))
|
|
throw new OverflowException ();
|
|
}
|
|
return new UShortConstant (target_type, (ushort) DoubleValue, Location);
|
|
case BuiltinTypeSpec.Type.Int:
|
|
if (in_checked_context) {
|
|
if (Value < int.MinValue || Value > int.MaxValue || float.IsNaN (Value))
|
|
throw new OverflowException ();
|
|
}
|
|
return new IntConstant (target_type, (int) DoubleValue, Location);
|
|
case BuiltinTypeSpec.Type.UInt:
|
|
if (in_checked_context) {
|
|
if (Value < uint.MinValue || Value > uint.MaxValue || float.IsNaN (Value))
|
|
throw new OverflowException ();
|
|
}
|
|
return new UIntConstant (target_type, (uint) DoubleValue, Location);
|
|
case BuiltinTypeSpec.Type.Long:
|
|
if (in_checked_context) {
|
|
if (Value < long.MinValue || Value > long.MaxValue || float.IsNaN (Value))
|
|
throw new OverflowException ();
|
|
}
|
|
return new LongConstant (target_type, (long) DoubleValue, Location);
|
|
case BuiltinTypeSpec.Type.ULong:
|
|
if (in_checked_context) {
|
|
if (Value < ulong.MinValue || Value > ulong.MaxValue || float.IsNaN (Value))
|
|
throw new OverflowException ();
|
|
}
|
|
return new ULongConstant (target_type, (ulong) DoubleValue, Location);
|
|
case BuiltinTypeSpec.Type.Double:
|
|
return new DoubleConstant (target_type, DoubleValue, Location);
|
|
case BuiltinTypeSpec.Type.Char:
|
|
if (in_checked_context) {
|
|
if (Value < (float) char.MinValue || Value > (float) char.MaxValue || float.IsNaN (Value))
|
|
throw new OverflowException ();
|
|
}
|
|
return new CharConstant (target_type, (char) DoubleValue, Location);
|
|
case BuiltinTypeSpec.Type.Decimal:
|
|
return new DecimalConstant (target_type, (decimal) DoubleValue, Location);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
}
|
|
|
|
public class DoubleConstant : Constant
|
|
{
|
|
public readonly double Value;
|
|
|
|
public DoubleConstant (BuiltinTypes types, double v, Location loc)
|
|
: this (types.Double, v, loc)
|
|
{
|
|
}
|
|
|
|
public DoubleConstant (TypeSpec type, double v, Location loc)
|
|
: base (loc)
|
|
{
|
|
this.type = type;
|
|
eclass = ExprClass.Value;
|
|
|
|
Value = v;
|
|
}
|
|
|
|
public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType, TypeSpec parameterType)
|
|
{
|
|
enc.Encode (Value);
|
|
}
|
|
|
|
public override void Emit (EmitContext ec)
|
|
{
|
|
ec.Emit (OpCodes.Ldc_R8, Value);
|
|
}
|
|
|
|
public override object GetValue ()
|
|
{
|
|
return Value;
|
|
}
|
|
|
|
public override string GetValueAsLiteral ()
|
|
{
|
|
return Value.ToString (CultureInfo.InvariantCulture);
|
|
}
|
|
|
|
public override long GetValueAsLong ()
|
|
{
|
|
throw new NotSupportedException ();
|
|
}
|
|
|
|
public override bool IsDefaultValue {
|
|
get {
|
|
return Value == 0;
|
|
}
|
|
}
|
|
|
|
public override bool IsNegative {
|
|
get {
|
|
return Value < 0;
|
|
}
|
|
}
|
|
|
|
public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
|
|
{
|
|
switch (target_type.BuiltinType) {
|
|
case BuiltinTypeSpec.Type.Byte:
|
|
if (in_checked_context) {
|
|
if (Value < Byte.MinValue || Value > Byte.MaxValue || double.IsNaN (Value))
|
|
throw new OverflowException ();
|
|
}
|
|
return new ByteConstant (target_type, (byte) Value, Location);
|
|
case BuiltinTypeSpec.Type.SByte:
|
|
if (in_checked_context) {
|
|
if (Value < SByte.MinValue || Value > SByte.MaxValue || double.IsNaN (Value))
|
|
throw new OverflowException ();
|
|
}
|
|
return new SByteConstant (target_type, (sbyte) Value, Location);
|
|
case BuiltinTypeSpec.Type.Short:
|
|
if (in_checked_context) {
|
|
if (Value < short.MinValue || Value > short.MaxValue || double.IsNaN (Value))
|
|
throw new OverflowException ();
|
|
}
|
|
return new ShortConstant (target_type, (short) Value, Location);
|
|
case BuiltinTypeSpec.Type.UShort:
|
|
if (in_checked_context) {
|
|
if (Value < ushort.MinValue || Value > ushort.MaxValue || double.IsNaN (Value))
|
|
throw new OverflowException ();
|
|
}
|
|
return new UShortConstant (target_type, (ushort) Value, Location);
|
|
case BuiltinTypeSpec.Type.Int:
|
|
if (in_checked_context) {
|
|
if (Value < int.MinValue || Value > int.MaxValue || double.IsNaN (Value))
|
|
throw new OverflowException ();
|
|
}
|
|
return new IntConstant (target_type, (int) Value, Location);
|
|
case BuiltinTypeSpec.Type.UInt:
|
|
if (in_checked_context) {
|
|
if (Value < uint.MinValue || Value > uint.MaxValue || double.IsNaN (Value))
|
|
throw new OverflowException ();
|
|
}
|
|
return new UIntConstant (target_type, (uint) Value, Location);
|
|
case BuiltinTypeSpec.Type.Long:
|
|
if (in_checked_context) {
|
|
if (Value < long.MinValue || Value > long.MaxValue || double.IsNaN (Value))
|
|
throw new OverflowException ();
|
|
}
|
|
return new LongConstant (target_type, (long) Value, Location);
|
|
case BuiltinTypeSpec.Type.ULong:
|
|
if (in_checked_context) {
|
|
if (Value < ulong.MinValue || Value > ulong.MaxValue || double.IsNaN (Value))
|
|
throw new OverflowException ();
|
|
}
|
|
return new ULongConstant (target_type, (ulong) Value, Location);
|
|
case BuiltinTypeSpec.Type.Float:
|
|
return new FloatConstant (target_type, (float) Value, Location);
|
|
case BuiltinTypeSpec.Type.Char:
|
|
if (in_checked_context) {
|
|
if (Value < (double) char.MinValue || Value > (double) char.MaxValue || double.IsNaN (Value))
|
|
throw new OverflowException ();
|
|
}
|
|
return new CharConstant (target_type, (char) Value, Location);
|
|
case BuiltinTypeSpec.Type.Decimal:
|
|
return new DecimalConstant (target_type, (decimal) Value, Location);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
}
|
|
|
|
public class DecimalConstant : Constant {
|
|
public readonly decimal Value;
|
|
|
|
public DecimalConstant (BuiltinTypes types, decimal d, Location loc)
|
|
: this (types.Decimal, d, loc)
|
|
{
|
|
}
|
|
|
|
public DecimalConstant (TypeSpec type, decimal d, Location loc)
|
|
: base (loc)
|
|
{
|
|
this.type = type;
|
|
eclass = ExprClass.Value;
|
|
|
|
Value = d;
|
|
}
|
|
|
|
public override void Emit (EmitContext ec)
|
|
{
|
|
MethodSpec m;
|
|
|
|
int [] words = decimal.GetBits (Value);
|
|
int power = (words [3] >> 16) & 0xff;
|
|
|
|
if (power == 0) {
|
|
if (Value <= int.MaxValue && Value >= int.MinValue) {
|
|
m = ec.Module.PredefinedMembers.DecimalCtorInt.Resolve (loc);
|
|
if (m == null) {
|
|
return;
|
|
}
|
|
|
|
ec.EmitInt ((int) Value);
|
|
ec.Emit (OpCodes.Newobj, m);
|
|
return;
|
|
}
|
|
|
|
if (Value <= long.MaxValue && Value >= long.MinValue) {
|
|
m = ec.Module.PredefinedMembers.DecimalCtorLong.Resolve (loc);
|
|
if (m == null) {
|
|
return;
|
|
}
|
|
|
|
ec.EmitLong ((long) Value);
|
|
ec.Emit (OpCodes.Newobj, m);
|
|
return;
|
|
}
|
|
}
|
|
|
|
ec.EmitInt (words [0]);
|
|
ec.EmitInt (words [1]);
|
|
ec.EmitInt (words [2]);
|
|
|
|
// sign
|
|
ec.EmitInt (words [3] >> 31);
|
|
|
|
// power
|
|
ec.EmitInt (power);
|
|
|
|
m = ec.Module.PredefinedMembers.DecimalCtor.Resolve (loc);
|
|
if (m != null) {
|
|
ec.Emit (OpCodes.Newobj, m);
|
|
}
|
|
}
|
|
|
|
public override bool IsDefaultValue {
|
|
get {
|
|
return Value == 0;
|
|
}
|
|
}
|
|
|
|
public override bool IsNegative {
|
|
get {
|
|
return Value < 0;
|
|
}
|
|
}
|
|
|
|
public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
|
|
{
|
|
switch (target_type.BuiltinType) {
|
|
case BuiltinTypeSpec.Type.SByte:
|
|
return new SByteConstant (target_type, (sbyte) Value, loc);
|
|
case BuiltinTypeSpec.Type.Byte:
|
|
return new ByteConstant (target_type, (byte) Value, loc);
|
|
case BuiltinTypeSpec.Type.Short:
|
|
return new ShortConstant (target_type, (short) Value, loc);
|
|
case BuiltinTypeSpec.Type.UShort:
|
|
return new UShortConstant (target_type, (ushort) Value, loc);
|
|
case BuiltinTypeSpec.Type.Int:
|
|
return new IntConstant (target_type, (int) Value, loc);
|
|
case BuiltinTypeSpec.Type.UInt:
|
|
return new UIntConstant (target_type, (uint) Value, loc);
|
|
case BuiltinTypeSpec.Type.Long:
|
|
return new LongConstant (target_type, (long) Value, loc);
|
|
case BuiltinTypeSpec.Type.ULong:
|
|
return new ULongConstant (target_type, (ulong) Value, loc);
|
|
case BuiltinTypeSpec.Type.Char:
|
|
return new CharConstant (target_type, (char) Value, loc);
|
|
case BuiltinTypeSpec.Type.Float:
|
|
return new FloatConstant (target_type, (float) Value, loc);
|
|
case BuiltinTypeSpec.Type.Double:
|
|
return new DoubleConstant (target_type, (double) Value, loc);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
public override object GetValue ()
|
|
{
|
|
return Value;
|
|
}
|
|
|
|
public override string GetValueAsLiteral ()
|
|
{
|
|
return Value.ToString (CultureInfo.InvariantCulture) + "M";
|
|
}
|
|
|
|
public override long GetValueAsLong ()
|
|
{
|
|
throw new NotSupportedException ();
|
|
}
|
|
}
|
|
|
|
public class StringConstant : Constant {
|
|
public StringConstant (BuiltinTypes types, string s, Location loc)
|
|
: this (types.String, s, loc)
|
|
{
|
|
}
|
|
|
|
public StringConstant (TypeSpec type, string s, Location loc)
|
|
: base (loc)
|
|
{
|
|
this.type = type;
|
|
eclass = ExprClass.Value;
|
|
|
|
Value = s;
|
|
}
|
|
|
|
protected StringConstant (Location loc)
|
|
: base (loc)
|
|
{
|
|
}
|
|
|
|
public string Value { get; protected set; }
|
|
|
|
public override object GetValue ()
|
|
{
|
|
return Value;
|
|
}
|
|
|
|
public override string GetValueAsLiteral ()
|
|
{
|
|
// FIXME: Escape the string.
|
|
return "\"" + Value + "\"";
|
|
}
|
|
|
|
public override long GetValueAsLong ()
|
|
{
|
|
throw new NotSupportedException ();
|
|
}
|
|
|
|
public override void Emit (EmitContext ec)
|
|
{
|
|
if (Value == null) {
|
|
ec.EmitNull ();
|
|
return;
|
|
}
|
|
|
|
//
|
|
// Use string.Empty for both literals and constants even if
|
|
// it's not allowed at language level
|
|
//
|
|
if (Value.Length == 0 && ec.Module.Compiler.Settings.Optimize) {
|
|
var string_type = ec.BuiltinTypes.String;
|
|
if (ec.CurrentType != string_type) {
|
|
var m = ec.Module.PredefinedMembers.StringEmpty.Get ();
|
|
if (m != null) {
|
|
ec.Emit (OpCodes.Ldsfld, m);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
var str = Value;
|
|
if (ec.Module.GetResourceStrings != null && !ec.Module.GetResourceStrings.TryGetValue (str, out str)) {
|
|
str = Value;
|
|
}
|
|
|
|
ec.Emit (OpCodes.Ldstr, str);
|
|
}
|
|
|
|
public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType, TypeSpec parameterType)
|
|
{
|
|
// cast to object
|
|
if (type != targetType)
|
|
enc.Encode (type);
|
|
|
|
enc.Encode (Value);
|
|
}
|
|
|
|
public override bool IsDefaultValue {
|
|
get {
|
|
return Value == null;
|
|
}
|
|
}
|
|
|
|
public override bool IsNegative {
|
|
get {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public override bool IsNull {
|
|
get {
|
|
return IsDefaultValue;
|
|
}
|
|
}
|
|
|
|
public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
|
|
{
|
|
return null;
|
|
}
|
|
|
|
public override Constant ConvertImplicitly (TypeSpec type)
|
|
{
|
|
if (IsDefaultValue && type.BuiltinType == BuiltinTypeSpec.Type.Object)
|
|
return new NullConstant (type, loc);
|
|
|
|
return base.ConvertImplicitly (type);
|
|
}
|
|
}
|
|
|
|
class NameOf : StringConstant
|
|
{
|
|
readonly SimpleName name;
|
|
|
|
public NameOf (SimpleName name)
|
|
: base (name.Location)
|
|
{
|
|
this.name = name;
|
|
}
|
|
|
|
protected override Expression DoResolve (ResolveContext rc)
|
|
{
|
|
throw new NotSupportedException ();
|
|
}
|
|
|
|
bool ResolveArgumentExpression (ResolveContext rc, Expression expr)
|
|
{
|
|
var sn = expr as SimpleName;
|
|
if (sn != null) {
|
|
Value = sn.Name;
|
|
|
|
if (rc.Module.Compiler.Settings.Version < LanguageVersion.V_6)
|
|
rc.Report.FeatureIsNotAvailable (rc.Module.Compiler, Location, "nameof operator");
|
|
|
|
var res = sn.LookupNameExpression (rc, MemberLookupRestrictions.IgnoreAmbiguity | MemberLookupRestrictions.NameOfExcluded);
|
|
var me = res as MemberExpr;
|
|
if (me != null)
|
|
me.ResolveNameOf (rc, sn);
|
|
|
|
return true;
|
|
}
|
|
|
|
var ma = expr as MemberAccess;
|
|
if (ma != null) {
|
|
var lexpr = ma.LeftExpression;
|
|
Expression res;
|
|
|
|
using (rc.Set (ResolveContext.Options.NameOfScope)) {
|
|
res = ma.LookupNameExpression (rc, MemberLookupRestrictions.IgnoreAmbiguity);
|
|
}
|
|
|
|
if (res == null) {
|
|
return false;
|
|
}
|
|
|
|
if (rc.Module.Compiler.Settings.Version < LanguageVersion.V_6)
|
|
rc.Report.FeatureIsNotAvailable (rc.Module.Compiler, Location, "nameof operator");
|
|
|
|
if (ma is QualifiedAliasMember) {
|
|
rc.Report.Error (8083, loc, "An alias-qualified name is not an expression");
|
|
return false;
|
|
}
|
|
|
|
var me = res as MemberExpr;
|
|
if (me != null) {
|
|
me.ResolveNameOf (rc, ma);
|
|
}
|
|
|
|
//
|
|
// LAMESPEC: Why is conditional access not allowed?
|
|
//
|
|
if (!IsLeftResolvedExpressionValid (ma.LeftExpression) || ma.HasConditionalAccess ()) {
|
|
rc.Report.Error (8082, lexpr.Location, "An argument to nameof operator cannot include sub-expression");
|
|
return false;
|
|
}
|
|
|
|
Value = ma.Name;
|
|
return true;
|
|
}
|
|
|
|
rc.Report.Error (8081, loc, "Expression does not have a name");
|
|
return false;
|
|
}
|
|
|
|
static bool IsLeftResolvedExpressionValid (Expression expr)
|
|
{
|
|
var fe = expr as FieldExpr;
|
|
if (fe != null) {
|
|
return fe.InstanceExpression == null || IsLeftResolvedExpressionValid (fe.InstanceExpression);
|
|
}
|
|
|
|
var pe = expr as PropertyExpr;
|
|
if (pe != null)
|
|
return pe.InstanceExpression == null || IsLeftResolvedExpressionValid (pe.InstanceExpression);
|
|
|
|
var dmb = expr as DynamicMemberBinder;
|
|
if (dmb != null) {
|
|
return IsLeftResolvedExpressionValid (dmb.Arguments [0].Expr);
|
|
}
|
|
|
|
if (expr is ConstantExpr || expr is TypeExpr || expr is NamespaceExpression || expr is VariableReference)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
public Expression ResolveOverload (ResolveContext rc, Arguments args)
|
|
{
|
|
if (args == null || args.Count != 1) {
|
|
name.Error_NameDoesNotExist (rc);
|
|
return null;
|
|
}
|
|
|
|
var arg = args [0];
|
|
var res = ResolveArgumentExpression (rc, arg.Expr);
|
|
if (!res) {
|
|
return null;
|
|
}
|
|
|
|
type = rc.BuiltinTypes.String;
|
|
eclass = ExprClass.Value;
|
|
return this;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Null constant can have its own type, think of `default (Foo)'
|
|
//
|
|
public class NullConstant : Constant
|
|
{
|
|
public NullConstant (TypeSpec type, Location loc)
|
|
: base (loc)
|
|
{
|
|
eclass = ExprClass.Value;
|
|
this.type = type;
|
|
}
|
|
|
|
public override Expression CreateExpressionTree (ResolveContext ec)
|
|
{
|
|
if (type == InternalType.NullLiteral || type.BuiltinType == BuiltinTypeSpec.Type.Object) {
|
|
// Optimized version, also avoids referencing literal internal type
|
|
Arguments args = new Arguments (1);
|
|
args.Add (new Argument (this));
|
|
return CreateExpressionFactoryCall (ec, "Constant", args);
|
|
}
|
|
|
|
return base.CreateExpressionTree (ec);
|
|
}
|
|
|
|
public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType, TypeSpec parameterType)
|
|
{
|
|
switch (targetType.BuiltinType) {
|
|
case BuiltinTypeSpec.Type.Object:
|
|
// Type it as string cast
|
|
enc.Encode (rc.Module.Compiler.BuiltinTypes.String);
|
|
goto case BuiltinTypeSpec.Type.String;
|
|
case BuiltinTypeSpec.Type.String:
|
|
case BuiltinTypeSpec.Type.Type:
|
|
enc.Encode (byte.MaxValue);
|
|
return;
|
|
default:
|
|
var ac = targetType as ArrayContainer;
|
|
if (ac != null && ac.Rank == 1 && !ac.Element.IsArray) {
|
|
enc.Encode (uint.MaxValue);
|
|
return;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
base.EncodeAttributeValue (rc, enc, targetType, parameterType);
|
|
}
|
|
|
|
public override void Emit (EmitContext ec)
|
|
{
|
|
ec.EmitNull ();
|
|
|
|
// Only to make verifier happy
|
|
if (type.IsGenericParameter)
|
|
ec.Emit (OpCodes.Unbox_Any, type);
|
|
}
|
|
|
|
public override string ExprClassName {
|
|
get {
|
|
return GetSignatureForError ();
|
|
}
|
|
}
|
|
|
|
public override Constant ConvertExplicitly (bool inCheckedContext, TypeSpec targetType)
|
|
{
|
|
if (targetType.IsPointer) {
|
|
if (IsLiteral || this is NullPointer)
|
|
return new NullPointer (targetType, loc);
|
|
|
|
return null;
|
|
}
|
|
|
|
// Exlude internal compiler types
|
|
if (targetType.Kind == MemberKind.InternalCompilerType && targetType.BuiltinType != BuiltinTypeSpec.Type.Dynamic)
|
|
return null;
|
|
|
|
if (!IsLiteral && !Convert.ImplicitStandardConversionExists (this, targetType))
|
|
return null;
|
|
|
|
if (TypeSpec.IsReferenceType (targetType))
|
|
return new NullConstant (targetType, loc);
|
|
|
|
if (targetType.IsNullableType)
|
|
return Nullable.LiftedNull.Create (targetType, loc);
|
|
|
|
return null;
|
|
}
|
|
|
|
public override Constant ConvertImplicitly (TypeSpec targetType)
|
|
{
|
|
return ConvertExplicitly (false, targetType);
|
|
}
|
|
|
|
public override string GetSignatureForError ()
|
|
{
|
|
return "null";
|
|
}
|
|
|
|
public override object GetValue ()
|
|
{
|
|
return null;
|
|
}
|
|
|
|
public override string GetValueAsLiteral ()
|
|
{
|
|
return GetSignatureForError ();
|
|
}
|
|
|
|
public override long GetValueAsLong ()
|
|
{
|
|
throw new NotSupportedException ();
|
|
}
|
|
|
|
public override bool IsDefaultValue {
|
|
get { return true; }
|
|
}
|
|
|
|
public override bool IsNegative {
|
|
get { return false; }
|
|
}
|
|
|
|
public override bool IsNull {
|
|
get { return true; }
|
|
}
|
|
|
|
public override bool IsZeroInteger {
|
|
get { return true; }
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// A null constant in a pointer context
|
|
//
|
|
class NullPointer : NullConstant
|
|
{
|
|
public NullPointer (TypeSpec type, Location loc)
|
|
: base (type, loc)
|
|
{
|
|
}
|
|
|
|
public override Expression CreateExpressionTree (ResolveContext ec)
|
|
{
|
|
Error_PointerInsideExpressionTree (ec);
|
|
return base.CreateExpressionTree (ec);
|
|
}
|
|
|
|
public override void Emit (EmitContext ec)
|
|
{
|
|
//
|
|
// Emits null pointer
|
|
//
|
|
ec.EmitInt (0);
|
|
ec.Emit (OpCodes.Conv_U);
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// The value is constant, but when emitted has a side effect. This is
|
|
/// used by BitwiseAnd to ensure that the second expression is invoked
|
|
/// regardless of the value of the left side.
|
|
/// </summary>
|
|
public class SideEffectConstant : Constant
|
|
{
|
|
public readonly Constant value;
|
|
Expression side_effect;
|
|
|
|
public SideEffectConstant (Constant value, Expression side_effect, Location loc)
|
|
: base (loc)
|
|
{
|
|
this.value = value;
|
|
type = value.Type;
|
|
eclass = ExprClass.Value;
|
|
|
|
while (side_effect is SideEffectConstant)
|
|
side_effect = ((SideEffectConstant) side_effect).side_effect;
|
|
this.side_effect = side_effect;
|
|
}
|
|
|
|
public override bool IsSideEffectFree {
|
|
get {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public override bool ContainsEmitWithAwait ()
|
|
{
|
|
return side_effect.ContainsEmitWithAwait ();
|
|
}
|
|
|
|
public override object GetValue ()
|
|
{
|
|
return value.GetValue ();
|
|
}
|
|
|
|
public override string GetValueAsLiteral ()
|
|
{
|
|
return value.GetValueAsLiteral ();
|
|
}
|
|
|
|
public override long GetValueAsLong ()
|
|
{
|
|
return value.GetValueAsLong ();
|
|
}
|
|
|
|
public override void Emit (EmitContext ec)
|
|
{
|
|
side_effect.EmitSideEffect (ec);
|
|
value.Emit (ec);
|
|
}
|
|
|
|
public override void EmitSideEffect (EmitContext ec)
|
|
{
|
|
side_effect.EmitSideEffect (ec);
|
|
value.EmitSideEffect (ec);
|
|
}
|
|
|
|
public override void FlowAnalysis (FlowAnalysisContext fc)
|
|
{
|
|
side_effect.FlowAnalysis (fc);
|
|
}
|
|
|
|
public override bool IsDefaultValue {
|
|
get { return value.IsDefaultValue; }
|
|
}
|
|
|
|
public override bool IsNegative {
|
|
get { return value.IsNegative; }
|
|
}
|
|
|
|
public override bool IsZeroInteger {
|
|
get { return value.IsZeroInteger; }
|
|
}
|
|
|
|
public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
|
|
{
|
|
Constant new_value = value.ConvertExplicitly (in_checked_context, target_type);
|
|
if (new_value == null)
|
|
return null;
|
|
|
|
var c = new SideEffectConstant (new_value, side_effect, new_value.Location);
|
|
c.type = target_type;
|
|
c.eclass = eclass;
|
|
return c;
|
|
}
|
|
}
|
|
}
|