Add UIXA string literals

libs/UIX.Asm/Lexer.Directives.cs

@@ -87,17 +87,30 @@ partial class Lexer
                     if (!typeNameResult.WasSuccessful)
                         return Result.Failure<IDirective>(input, "Invalid constant directive", ["Expected qualified name of type to construct"]);
 
+                    Markup.MarkupConstantPersistMode? persistMode = null;
+                    string content = "";
+
                     var encodingMarkerResult = Parse.Char('.')(input);
                     input = encodingMarkerResult.Remainder;
                     if (!encodingMarkerResult.WasSuccessful)
+                    {
+                        // Support defining constants from string literals
+                        var stringLiteralResult = ExpressionInBraces(StringLiteral)(input);
+                        input = stringLiteralResult.Remainder;
+                        if (!stringLiteralResult.WasSuccessful)
                             return Result.Failure<IDirective>(input, "Invalid constant directive", ["Expected '.', followed by the persist mode."]);
 
+                        persistMode = Markup.MarkupConstantPersistMode.FromString;
+                        content = stringLiteralResult.Value[1..^1].Unescape();
+                    }
+                    else
+                    {
                         var persistModeResult = Parse.CharExcept('(').AtLeastOnce().Text().Token()(input);
                         input = persistModeResult.Remainder;
                         if (!persistModeResult.WasSuccessful)
                             return Result.Failure<IDirective>(input, "Invalid constant directive", ["No persist mode was specified."]);
 
-                    Markup.MarkupConstantPersistMode? persistMode = persistModeResult.Value.ToLowerInvariant() switch
+                        persistMode = persistModeResult.Value.ToLowerInvariant() switch
                         {
                             "bin" => Markup.MarkupConstantPersistMode.Binary,
                             "str" => Markup.MarkupConstantPersistMode.FromString,
@@ -110,22 +123,23 @@ partial class Lexer
                         if (!openBracketResult.WasSuccessful)
                             return Result.Failure<IDirective>(input, "Invalid constant directive", ["Expected '('"]);
 
-                    var contentResult = Parse.CharExcept(')').AtLeastOnce().Text().Token()(input);
+                        var contentResult = Parse.AnyChar.Until(StatementEnd).Text().Token()(input);
                         input = contentResult.Remainder;
                         if (!contentResult.WasSuccessful)
                             return Result.Failure<IDirective>(input, "Invalid constant directive", ["Expected constant value"]);
 
-                    var closeBracketResult = Parse.Char(')').Token()(input);
-                    input = closeBracketResult.Remainder;
-                    if (!closeBracketResult.WasSuccessful)
+                        content = contentResult.Value;
+                        if (content.Length <= 1 || content[^1] != ')')
                             return Result.Failure<IDirective>(input, "Invalid constant directive", ["Expected ')'"]);
+                        content = content[..^1];
+                    }
 
                     var constantName = constNameResult.Value;
                     var typeName = typeNameResult.Value;
 
                     if (persistMode == Markup.MarkupConstantPersistMode.FromString)
                     {
-                        directive = new StringEncodedConstantDirective(constantName, typeName, contentResult.Value)
+                        directive = new StringEncodedConstantDirective(constantName, typeName, content)
                         {
                             Line = line,
                             Column = column,
@@ -133,7 +147,7 @@ partial class Lexer
                     }
                     else if (persistMode == Markup.MarkupConstantPersistMode.Canonical)
                     {
-                        directive = new CanonicalInstanceConstantDirective(constantName, typeName, contentResult.Value)
+                        directive = new CanonicalInstanceConstantDirective(constantName, typeName, content)
                         {
                             Line = line,
                             Column = column,
@@ -142,7 +156,7 @@ partial class Lexer
                     else if (persistMode == Markup.MarkupConstantPersistMode.Binary)
                     {
                         byte[] constantBytes;
-                        var byteParts = contentResult.Value.Split(',');
+                        var byteParts = content.Split(',');
                         if (byteParts.Length == 1)
                         {
                             var constantStr = byteParts[0].Trim();
@@ -167,7 +181,7 @@ partial class Lexer
                             }
                             else
                             {
-                                return Result.Failure<IDirective>(input, "Invalid constant directive", [$"Expected a 1, 2, or 4 hex number, or a list of bytes."]);
+                                return Result.Failure<IDirective>(input, "Invalid constant directive", [$"Expected a 1-, 2-, or 4-digit hex number, or a list of bytes"]);
                             }
                         }
                         else
@@ -185,7 +199,7 @@ partial class Lexer
                     }
                     else
                     {
-                        return Result.Failure<IDirective>(input, "Invalid constant directive", [$"'{persistModeResult.Value}' is not a valid persist mode."]);
+                        return Result.Failure<IDirective>(input, "Invalid constant directive", [$"Invalid persist mode"]);
                     }
                 }
                 break;

libs/UIX.Asm/Lexer.cs

@@ -16,6 +16,16 @@ public static partial class Lexer
 
     public static readonly Parser<string> Uri = Parse.LetterOrDigit.Or(Parse.Chars(":/!._-")).AtLeastOnce().Text();
 
+    // https://github.com/apexsharp/apexparser/blob/4eb5983c657b0e6c49ed47bc42a0346e80f9e26d/ApexSharp.ApexParser/Parser/ApexGrammar.cs#L360C9-L367C64
+    public static readonly Parser<string> StringLiteral =
+        from leading in Parse.WhiteSpace.Many()
+        from openQuote in Parse.Char('"')
+        from fragments in Parse.Char('\\').Then(_ => Parse.AnyChar.Select(c => $"\\{c}"))
+            .Or(Parse.CharExcept("\\\"").Many().Text()).Many()
+        from closeQuote in Parse.Char('"')
+        from trailing in Parse.WhiteSpace.Many()
+        select $"\"{string.Join(string.Empty, fragments)}\"";
+
     public static readonly Parser<string> StatementEnd = Parse.Char(';').Return(";").Or(Parse.LineTerminator);
 
     public static readonly Parser<QualifiedTypeName> QualifiedTypeName = ParseQualifiedTypeName;
@@ -70,4 +80,10 @@ public static partial class Lexer
 
         return Result.Success(qualifiedName, input);
     }
+
+    private static Parser<string> ExpressionInBraces(Parser<string> parser, char open = '(', char close = ')') =>
+        from openBrace in Parse.Char(open).Token()
+        from expression in parser.Optional()
+        from closeBrace in Parse.Char(close).Token()
+        select expression.GetOrElse(string.Empty).Trim();
 }

libs/UIX.Asm/Models/ConstantDirectives.cs

@@ -24,7 +24,7 @@ public record ConstantDirective : Directive
 public record StringEncodedConstantDirective : ConstantDirective
 {
     public StringEncodedConstantDirective(string name, QualifiedTypeName typeName, string content)
-        : base(name, typeName, $"{typeName}.str({content})")
+        : base(name, typeName, $"{typeName}(\"{content.Escape()}\")")
     {
         Content = content;
         PersistMode = MarkupConstantPersistMode.FromString;

libs/UIX.Test/Assembly.cs

@@ -45,6 +45,8 @@ public class Assembly
 .constant const3 = Color.str(255, 0, 0, 255)
 .constant const4 = Font.str(JetBrains Mono)
 .constant const5 = String.str(This is some blue text)
+.constant const3255 = String.str(({0:X8}))
+.constant const3256 = String("Content\nOn a new line")
 .section object
 
 Default_cont:
@@ -77,7 +79,7 @@ Alt_locl:
         _output.WriteLine(ast.ToString());
 
         Assert.NotNull(ast);
-        Assert.Equal(20, ast.Directives.Count());
+        Assert.Equal(22, ast.Directives.Count());
         Assert.Equal(24, ast.Code.Count());
     }