Imported Upstream version 5.0.0.42

Former-commit-id: fd56571888259555122d8a0f58c68838229cea2b

external/linker/cecil/symbols/pdb/Microsoft.Cci.Pdb/Interfaces.cs

@@ -0,0 +1,77 @@
+using System;
+using System.Collections.Generic;
+
+namespace Microsoft.Cci {
+
+  /// <summary>
+  /// A range of CLR IL operations that comprise a lexical scope, specified as an IL offset and a length.
+  /// </summary>
+  public interface ILocalScope {
+    /// <summary>
+    /// The offset of the first operation in the scope.
+    /// </summary>
+    uint Offset { get; }
+
+    /// <summary>
+    /// The length of the scope. Offset+Length equals the offset of the first operation outside the scope, or equals the method body length.
+    /// </summary>
+    uint Length { get; }
+  }
+
+  /// <summary>
+  /// A description of the lexical scope in which a namespace type has been nested. This scope is tied to a particular
+  /// method body, so that partial types can be accommodated.
+  /// </summary>
+  public interface INamespaceScope {
+
+    /// <summary>
+    /// Zero or more used namespaces. These correspond to using clauses in C#.
+    /// </summary>
+    IEnumerable<IUsedNamespace> UsedNamespaces { get; }
+
+  }
+
+
+  /// <summary>
+  /// A namespace that is used (imported) inside a namespace scope.
+  /// </summary>
+  public interface IUsedNamespace {
+    /// <summary>
+    /// An alias for a namespace. For example the "x" of "using x = y.z;" in C#. Empty if no alias is present.
+    /// </summary>
+    IName Alias { get; }
+
+    /// <summary>
+    /// The name of a namepace that has been aliased.  For example the "y.z" of "using x = y.z;" or "using y.z" in C#.
+    /// </summary>
+    IName NamespaceName { get; }
+  }
+
+  /// <summary>
+  /// The name of an entity. Typically name instances come from a common pool. Within the pool no two distinct instances will have the same Value or UniqueKey.
+  /// </summary>
+  public interface IName {
+    /// <summary>
+    /// An integer that is unique within the pool from which the name instance has been allocated. Useful as a hashtable key.
+    /// </summary>
+    int UniqueKey {
+      get;
+        //^ ensures result > 0;
+    }
+
+    /// <summary>
+    /// An integer that is unique within the pool from which the name instance has been allocated. Useful as a hashtable key.
+    /// All name instances in the pool that have the same string value when ignoring the case of the characters in the string
+    /// will have the same key value.
+    /// </summary>
+    int UniqueKeyIgnoringCase {
+      get;
+      //^ ensures result > 0;
+    }
+
+    /// <summary>
+    /// The string value corresponding to this name.
+    /// </summary>
+    string Value { get; }
+  }
+}