-//\r
-// constant.cs: Constants.\r
-//\r
-// Author:\r
-// Miguel de Icaza (miguel@ximian.com)\r
-//\r
-// (C) 2001 Ximian, Inc.\r
-//\r
-//\r
-\r
-namespace Mono.CSharp {\r
-\r
- using System;\r
- using System.Reflection.Emit;\r
-\r
- /// <summary>\r
- /// Base class for constants and literals.\r
- /// </summary>\r
- public abstract class Constant : Expression {\r
- /// <remarks>\r
- /// This is different from ToString in that ToString\r
- /// is supposed to be there for debugging purposes,\r
- /// and is not guaranteed to be useful for anything else,\r
- /// AsString() will provide something that can be used\r
- /// for round-tripping C# code. Maybe it can be used\r
- /// for IL assembly as well.\r
- /// </remarks>\r
- public abstract string AsString ();\r
-\r
- override public string ToString ()\r
- {\r
- return this.GetType ().Name + " (" + AsString () + ")";\r
- }\r
-\r
- /// <summary>\r
- /// This is used to obtain the actual value of the literal\r
- /// cast into an object.\r
- /// </summary>\r
- public abstract object GetValue ();\r
-\r
- /// <summary>\r
- /// Constants are always born in a fully resolved state\r
- /// </summary>\r
- public override Expression DoResolve (EmitContext ec)\r
- {\r
- return this;\r
- }\r
-\r
- //\r
- // The various ToXXXX conversion functions are used by the constant\r
- // folding evaluator. A null value is returned if the conversion is\r
- // not possible. \r
- //\r
- // Note: not all the patterns for catching `implicit_conv' are the same.\r
- // some implicit conversions can never be performed between two types\r
- // even if the conversion would be lossless (for example short to uint),\r
- // but some conversions are explicitly permitted by the standard provided\r
- // that there will be no loss of information (for example, int to uint).\r
- //\r
- public DoubleConstant ToDouble (Location loc)\r
- {\r
- DoubleConstant c = ConvertToDouble ();\r
-\r
- if (c == null)\r
- Error_CannotConvertImplicit (loc, Type, TypeManager.double_type);\r
-\r
- return c;\r
- }\r
-\r
- public FloatConstant ToFloat (Location loc)\r
- {\r
- FloatConstant c = ConvertToFloat ();\r
-\r
- if (c == null)\r
- Error_CannotConvertImplicit (loc, Type, TypeManager.float_type);\r
-\r
- return c;\r
- }\r
-\r
- public ULongConstant ToULong (Location loc)\r
- {\r
- ULongConstant c = ConvertToULong ();\r
-\r
- if (c == null)\r
- Error_CannotConvertImplicit (loc, Type, TypeManager.uint64_type);\r
-\r
- return c;\r
- }\r
-\r
- public LongConstant ToLong (Location loc)\r
- {\r
- LongConstant c = ConvertToLong ();\r
-\r
- if (c == null)\r
- Error_CannotConvertImplicit (loc, Type, TypeManager.int64_type);\r
-\r
- return c;\r
- }\r
- \r
- public UIntConstant ToUInt (Location loc)\r
- {\r
- UIntConstant c = ConvertToUInt ();\r
-\r
- if (c == null)\r
- Error_CannotConvertImplicit (loc, Type, TypeManager.uint32_type);\r
-\r
- return c;\r
- }\r
-\r
- public IntConstant ToInt (Location loc)\r
- {\r
- IntConstant c = ConvertToInt ();\r
-\r
- if (c == null)\r
- Error_CannotConvertImplicit (loc, Type, TypeManager.int32_type);\r
-\r
- return c;\r
- }\r
- \r
- public virtual DoubleConstant ConvertToDouble ()\r
- {\r
- return null;\r
- }\r
-\r
- public virtual FloatConstant ConvertToFloat ()\r
- {\r
- return null;\r
- }\r
-\r
- public virtual ULongConstant ConvertToULong ()\r
- {\r
- return null;\r
- }\r
-\r
- public virtual LongConstant ConvertToLong ()\r
- {\r
- return null;\r
- }\r
-\r
- public virtual UIntConstant ConvertToUInt ()\r
- {\r
- return null;\r
- }\r
-\r
- public virtual IntConstant ConvertToInt ()\r
- {\r
- return null;\r
- }\r
- }\r
- \r
- public class BoolConstant : Constant {\r
- public readonly bool Value;\r
- \r
- public BoolConstant (bool val)\r
- {\r
- type = TypeManager.bool_type;\r
- eclass = ExprClass.Value;\r
-\r
- Value = val;\r
- }\r
-\r
- override public string AsString ()\r
- {\r
- return Value ? "true" : "false";\r
- }\r
-\r
- public override object GetValue ()\r
- {\r
- return (object) Value;\r
- }\r
- \r
- \r
- public override void Emit (EmitContext ec)\r
- {\r
- if (Value)\r
- ec.ig.Emit (OpCodes.Ldc_I4_1);\r
- else\r
- ec.ig.Emit (OpCodes.Ldc_I4_0);\r
- }\r
- }\r
-\r
- public class ByteConstant : Constant {\r
- public readonly byte Value;\r
-\r
- public ByteConstant (byte v)\r
- {\r
- type = TypeManager.byte_type;\r
- eclass = ExprClass.Value;\r
- Value = v;\r
- }\r
-\r
- public override void Emit (EmitContext ec)\r
- {\r
- IntLiteral.EmitInt (ec.ig, Value);\r
- }\r
-\r
- public override string AsString ()\r
- {\r
- return Value.ToString ();\r
- }\r
-\r
- public override object GetValue ()\r
- {\r
- return Value;\r
- }\r
-\r
- public override DoubleConstant ConvertToDouble ()\r
- {\r
- return new DoubleConstant (Value);\r
- }\r
-\r
- public override FloatConstant ConvertToFloat ()\r
- {\r
- return new FloatConstant (Value);\r
- }\r
-\r
- public override ULongConstant ConvertToULong ()\r
- {\r
- return new ULongConstant (Value);\r
- }\r
-\r
- public override LongConstant ConvertToLong ()\r
- {\r
- return new LongConstant (Value);\r
- }\r
-\r
- public override UIntConstant ConvertToUInt ()\r
- {\r
- return new UIntConstant (Value);\r
- }\r
-\r
- public override IntConstant ConvertToInt ()\r
- {\r
- return new IntConstant (Value);\r
- }\r
- }\r
-\r
- public class CharConstant : Constant {\r
- public readonly char Value;\r
-\r
- public CharConstant (char v)\r
- {\r
- type = TypeManager.char_type;\r
- eclass = ExprClass.Value;\r
- Value = v;\r
- }\r
-\r
- public override void Emit (EmitContext ec)\r
- {\r
- IntLiteral.EmitInt (ec.ig, Value);\r
- }\r
-\r
- static public string descape (char c)\r
- {\r
- switch (c){\r
- case '\a':\r
- return "\\a"; \r
- case '\b':\r
- return "\\b"; \r
- case '\n':\r
- return "\\n"; \r
- case '\t':\r
- return "\\t"; \r
- case '\v':\r
- return "\\v"; \r
- case '\r':\r
- return "\\r"; \r
- case '\\':\r
- return "\\\\";\r
- case '\f':\r
- return "\\f"; \r
- case '\0':\r
- return "\\0"; \r
- case '"':\r
- return "\\\""; \r
- case '\'':\r
- return "\\\'"; \r
- }\r
- return c.ToString ();\r
- }\r
-\r
- public override string AsString ()\r
- {\r
- return "\"" + descape (Value) + "\"";\r
- }\r
-\r
- public override object GetValue ()\r
- {\r
- return Value;\r
- }\r
-\r
- public override DoubleConstant ConvertToDouble ()\r
- {\r
- return new DoubleConstant (Value);\r
- }\r
-\r
- public override FloatConstant ConvertToFloat ()\r
- {\r
- return new FloatConstant (Value);\r
- }\r
-\r
- public override ULongConstant ConvertToULong ()\r
- {\r
- return new ULongConstant (Value);\r
- }\r
-\r
- public override LongConstant ConvertToLong ()\r
- {\r
- return new LongConstant (Value);\r
- }\r
-\r
- public override UIntConstant ConvertToUInt ()\r
- {\r
- return new UIntConstant (Value);\r
- }\r
-\r
- public override IntConstant ConvertToInt ()\r
- {\r
- return new IntConstant (Value);\r
- }\r
- }\r
-\r
- public class SByteConstant : Constant {\r
- public readonly sbyte Value;\r
-\r
- public SByteConstant (sbyte v)\r
- {\r
- type = TypeManager.sbyte_type;\r
- eclass = ExprClass.Value;\r
- Value = v;\r
- }\r
-\r
- public override void Emit (EmitContext ec)\r
- {\r
- IntLiteral.EmitInt (ec.ig, Value);\r
- }\r
-\r
- public override string AsString ()\r
- {\r
- return Value.ToString ();\r
- }\r
-\r
- public override object GetValue ()\r
- {\r
- return Value;\r
- }\r
-\r
- public override DoubleConstant ConvertToDouble ()\r
- {\r
- return new DoubleConstant (Value);\r
- }\r
-\r
- public override FloatConstant ConvertToFloat ()\r
- {\r
- return new FloatConstant (Value);\r
- }\r
-\r
- public override ULongConstant ConvertToULong ()\r
- {\r
- if (Value >= 0)\r
- return new ULongConstant ((ulong) Value);\r
- \r
- return null;\r
- }\r
-\r
- public override LongConstant ConvertToLong ()\r
- {\r
- return new LongConstant (Value);\r
- }\r
-\r
- public override UIntConstant ConvertToUInt ()\r
- {\r
- return null;\r
- }\r
-\r
- public override IntConstant ConvertToInt ()\r
- {\r
- return new IntConstant (Value);\r
- }\r
- }\r
-\r
- public class ShortConstant : Constant {\r
- public readonly short Value;\r
-\r
- public ShortConstant (short v)\r
- {\r
- type = TypeManager.short_type;\r
- eclass = ExprClass.Value;\r
- Value = v;\r
- }\r
-\r
- public override void Emit (EmitContext ec)\r
- {\r
- IntLiteral.EmitInt (ec.ig, Value);\r
- }\r
-\r
- public override string AsString ()\r
- {\r
- return Value.ToString ();\r
- }\r
-\r
- public override object GetValue ()\r
- {\r
- return Value;\r
- }\r
-\r
- public override DoubleConstant ConvertToDouble ()\r
- {\r
- return new DoubleConstant (Value);\r
- }\r
-\r
- public override FloatConstant ConvertToFloat ()\r
- {\r
- return new FloatConstant (Value);\r
- }\r
-\r
- public override ULongConstant ConvertToULong ()\r
- {\r
- return null;\r
- }\r
-\r
- public override LongConstant ConvertToLong ()\r
- {\r
- return new LongConstant (Value);\r
- }\r
-\r
- public override UIntConstant ConvertToUInt ()\r
- {\r
- return null;\r
- }\r
-\r
- public override IntConstant ConvertToInt ()\r
- {\r
- return new IntConstant (Value);\r
- }\r
- }\r
-\r
- public class UShortConstant : Constant {\r
- public readonly ushort Value;\r
-\r
- public UShortConstant (ushort v)\r
- {\r
- type = TypeManager.ushort_type;\r
- eclass = ExprClass.Value;\r
- Value = v;\r
- }\r
-\r
- public override void Emit (EmitContext ec)\r
- {\r
- IntLiteral.EmitInt (ec.ig, Value);\r
- }\r
-\r
- public override string AsString ()\r
- {\r
- return Value.ToString ();\r
- }\r
-\r
- public override object GetValue ()\r
- {\r
- return Value;\r
- }\r
-\r
- public override DoubleConstant ConvertToDouble ()\r
- {\r
- return new DoubleConstant (Value);\r
- }\r
-\r
- public override FloatConstant ConvertToFloat ()\r
- {\r
- return new FloatConstant (Value);\r
- }\r
-\r
- public override ULongConstant ConvertToULong ()\r
- {\r
- return new ULongConstant (Value);\r
- }\r
-\r
- public override LongConstant ConvertToLong ()\r
- {\r
- return new LongConstant (Value);\r
- }\r
-\r
- public override UIntConstant ConvertToUInt ()\r
- {\r
- return new UIntConstant (Value);\r
- }\r
-\r
- public override IntConstant ConvertToInt ()\r
- {\r
- return new IntConstant (Value);\r
- }\r
- }\r
-\r
- public class IntConstant : Constant {\r
- public readonly int Value;\r
-\r
- public IntConstant (int v)\r
- {\r
- type = TypeManager.int32_type;\r
- eclass = ExprClass.Value;\r
- Value = v;\r
- }\r
-\r
- static public void EmitInt (ILGenerator ig, int i)\r
- {\r
- switch (i){\r
- case -1:\r
- ig.Emit (OpCodes.Ldc_I4_M1);\r
- break;\r
- \r
- case 0:\r
- ig.Emit (OpCodes.Ldc_I4_0);\r
- break;\r
- \r
- case 1:\r
- ig.Emit (OpCodes.Ldc_I4_1);\r
- break;\r
- \r
- case 2:\r
- ig.Emit (OpCodes.Ldc_I4_2);\r
- break;\r
- \r
- case 3:\r
- ig.Emit (OpCodes.Ldc_I4_3);\r
- break;\r
- \r
- case 4:\r
- ig.Emit (OpCodes.Ldc_I4_4);\r
- break;\r
- \r
- case 5:\r
- ig.Emit (OpCodes.Ldc_I4_5);\r
- break;\r
- \r
- case 6:\r
- ig.Emit (OpCodes.Ldc_I4_6);\r
- break;\r
- \r
- case 7:\r
- ig.Emit (OpCodes.Ldc_I4_7);\r
- break;\r
- \r
- case 8:\r
- ig.Emit (OpCodes.Ldc_I4_8);\r
- break;\r
-\r
- default:\r
- if (i >= -128 && i <= 127){\r
- ig.Emit (OpCodes.Ldc_I4_S, (sbyte) i);\r
- } else\r
- ig.Emit (OpCodes.Ldc_I4, i);\r
- break;\r
- }\r
- }\r
-\r
- public override void Emit (EmitContext ec)\r
- {\r
- EmitInt (ec.ig, Value);\r
- }\r
-\r
- public override string AsString ()\r
- {\r
- return Value.ToString ();\r
- }\r
-\r
- public override object GetValue ()\r
- {\r
- return Value;\r
- }\r
-\r
- public override DoubleConstant ConvertToDouble ()\r
- {\r
- return new DoubleConstant (Value);\r
- }\r
-\r
- public override FloatConstant ConvertToFloat ()\r
- {\r
- return new FloatConstant (Value);\r
- }\r
-\r
- public override ULongConstant ConvertToULong ()\r
- {\r
- if (Value < 0)\r
- return null;\r
-\r
- return new ULongConstant ((ulong) Value);\r
- }\r
-\r
- public override LongConstant ConvertToLong ()\r
- {\r
- return new LongConstant (Value);\r
- }\r
-\r
- public override UIntConstant ConvertToUInt ()\r
- {\r
- if (Value < 0)\r
- return null;\r
-\r
- return new UIntConstant ((uint) Value);\r
- }\r
-\r
- public override IntConstant ConvertToInt ()\r
- {\r
- return this;\r
- }\r
- }\r
-\r
- public class UIntConstant : Constant {\r
- public readonly uint Value;\r
-\r
- public UIntConstant (uint v)\r
- {\r
- type = TypeManager.uint32_type;\r
- eclass = ExprClass.Value;\r
- Value = v;\r
- }\r
-\r
- public override void Emit (EmitContext ec)\r
- {\r
- IntLiteral.EmitInt (ec.ig, unchecked ((int) Value));\r
- }\r
-\r
- public override string AsString ()\r
- {\r
- return Value.ToString ();\r
- }\r
-\r
- public override object GetValue ()\r
- {\r
- return Value;\r
- }\r
-\r
- public override DoubleConstant ConvertToDouble ()\r
- {\r
- return new DoubleConstant (Value);\r
- }\r
-\r
- public override FloatConstant ConvertToFloat ()\r
- {\r
- return new FloatConstant (Value);\r
- }\r
-\r
- public override ULongConstant ConvertToULong ()\r
- {\r
- return new ULongConstant (Value);\r
- }\r
-\r
- public override LongConstant ConvertToLong ()\r
- {\r
- return new LongConstant (Value);\r
- }\r
-\r
- public override UIntConstant ConvertToUInt ()\r
- {\r
- return this;\r
- }\r
-\r
- public override IntConstant ConvertToInt ()\r
- {\r
- return null;\r
- }\r
- }\r
-\r
- public class LongConstant : Constant {\r
- public readonly long Value;\r
-\r
- public LongConstant (long v)\r
- {\r
- type = TypeManager.int64_type;\r
- eclass = ExprClass.Value;\r
- Value = v;\r
- }\r
-\r
- public override void Emit (EmitContext ec)\r
- {\r
- ILGenerator ig = ec.ig;\r
-\r
- EmitLong (ig, Value);\r
- }\r
-\r
- static public void EmitLong (ILGenerator ig, long l)\r
- {\r
- ig.Emit (OpCodes.Ldc_I8, l);\r
- }\r
-\r
- public override string AsString ()\r
- {\r
- return Value.ToString ();\r
- }\r
-\r
- public override object GetValue ()\r
- {\r
- return Value;\r
- }\r
-\r
- public override DoubleConstant ConvertToDouble ()\r
- {\r
- return new DoubleConstant (Value);\r
- }\r
-\r
- public override FloatConstant ConvertToFloat ()\r
- {\r
- return new FloatConstant (Value);\r
- }\r
-\r
- public override ULongConstant ConvertToULong ()\r
- {\r
- if (Value < 0)\r
- return null;\r
- \r
- return new ULongConstant ((ulong) Value);\r
- }\r
-\r
- public override LongConstant ConvertToLong ()\r
- {\r
- return this;\r
- }\r
-\r
- public override UIntConstant ConvertToUInt ()\r
- {\r
- return null;\r
- }\r
-\r
- public override IntConstant ConvertToInt ()\r
- {\r
- return null;\r
- }\r
- }\r
-\r
- public class ULongConstant : Constant {\r
- public readonly ulong Value;\r
-\r
- public ULongConstant (ulong v)\r
- {\r
- type = TypeManager.uint64_type;\r
- eclass = ExprClass.Value;\r
- Value = v;\r
- }\r
-\r
- public override void Emit (EmitContext ec)\r
- {\r
- ILGenerator ig = ec.ig;\r
-\r
- LongLiteral.EmitLong (ig, unchecked ((long) Value));\r
- }\r
-\r
- public override string AsString ()\r
- {\r
- return Value.ToString ();\r
- }\r
-\r
- public override object GetValue ()\r
- {\r
- return Value;\r
- }\r
-\r
- public override DoubleConstant ConvertToDouble ()\r
- {\r
- return new DoubleConstant (Value);\r
- }\r
-\r
- public override FloatConstant ConvertToFloat ()\r
- {\r
- return new FloatConstant (Value);\r
- }\r
-\r
- public override ULongConstant ConvertToULong ()\r
- {\r
- return this;\r
- }\r
-\r
- public override LongConstant ConvertToLong ()\r
- {\r
- return null;\r
- }\r
-\r
- public override UIntConstant ConvertToUInt ()\r
- {\r
- return null;\r
- }\r
-\r
- public override IntConstant ConvertToInt ()\r
- {\r
- return null;\r
- }\r
- }\r
-\r
- public class FloatConstant : Constant {\r
- public readonly float Value;\r
-\r
- public FloatConstant (float v)\r
- {\r
- type = TypeManager.float_type;\r
- eclass = ExprClass.Value;\r
- Value = v;\r
- }\r
-\r
- public override void Emit (EmitContext ec)\r
- {\r
- ec.ig.Emit (OpCodes.Ldc_R4, Value);\r
- }\r
-\r
- public override string AsString ()\r
- {\r
- return Value.ToString ();\r
- }\r
-\r
- public override object GetValue ()\r
- {\r
- return Value;\r
- }\r
-\r
- public override DoubleConstant ConvertToDouble ()\r
- {\r
- return new DoubleConstant (Value);\r
- }\r
-\r
- public override FloatConstant ConvertToFloat ()\r
- {\r
- return this;\r
- }\r
-\r
- public override LongConstant ConvertToLong ()\r
- {\r
- return null;\r
- }\r
-\r
- public override UIntConstant ConvertToUInt ()\r
- {\r
- return null;\r
- }\r
-\r
- public override IntConstant ConvertToInt ()\r
- {\r
- return null;\r
- }\r
- }\r
-\r
- public class DoubleConstant : Constant {\r
- public readonly double Value;\r
-\r
- public DoubleConstant (double v)\r
- {\r
- type = TypeManager.double_type;\r
- eclass = ExprClass.Value;\r
- Value = v;\r
- }\r
-\r
- public override void Emit (EmitContext ec)\r
- {\r
- ec.ig.Emit (OpCodes.Ldc_R8, Value);\r
- }\r
-\r
- public override string AsString ()\r
- {\r
- return Value.ToString ();\r
- }\r
-\r
- public override object GetValue ()\r
- {\r
- return Value;\r
- }\r
-\r
- public override DoubleConstant ConvertToDouble ()\r
- {\r
- return this;\r
- }\r
-\r
- public override FloatConstant ConvertToFloat ()\r
- {\r
- return null;\r
- }\r
-\r
- public override ULongConstant ConvertToULong ()\r
- {\r
- return null;\r
- }\r
-\r
- public override LongConstant ConvertToLong ()\r
- {\r
- return null;\r
- }\r
-\r
- public override UIntConstant ConvertToUInt ()\r
- {\r
- return null;\r
- }\r
-\r
- public override IntConstant ConvertToInt ()\r
- {\r
- return null;\r
- }\r
- }\r
-\r
- public class DecimalConstant : Constant {\r
- public readonly decimal Value;\r
-\r
- public DecimalConstant (decimal d)\r
- {\r
- type = TypeManager.decimal_type;\r
- eclass = ExprClass.Value;\r
- Value = d;\r
- }\r
-\r
- override public string AsString ()\r
- {\r
- return Value.ToString ();\r
- }\r
-\r
- public override object GetValue ()\r
- {\r
- return (object) Value;\r
- }\r
-\r
- public override void Emit (EmitContext ec)\r
- {\r
- throw new Exception ("Implement me");\r
- }\r
- }\r
-\r
- public class StringConstant : Constant {\r
- public readonly string Value;\r
-\r
- public StringConstant (string s)\r
- {\r
- type = TypeManager.string_type;\r
- eclass = ExprClass.Value;\r
- Value = s;\r
- }\r
-\r
- // FIXME: Escape the string.\r
- override public string AsString ()\r
- {\r
- return "\"" + Value + "\"";\r
- }\r
-\r
- public override object GetValue ()\r
- {\r
- return Value;\r
- }\r
- \r
- public override void Emit (EmitContext ec)\r
- {\r
- ec.ig.Emit (OpCodes.Ldstr, Value);\r
- }\r
- }\r
-\r
-}\r
-\r
-\r
+//
+// constant.cs: Constants.
+//
+// Author:
+// Miguel de Icaza (miguel@ximian.com)
+//
+// (C) 2001 Ximian, Inc.
+//
+//
+
+namespace Mono.CSharp {
+
+ using System;
+ using System.Reflection.Emit;
+
+ /// <summary>
+ /// Base class for constants and literals.
+ /// </summary>
+ public abstract class Constant : Expression {
+ /// <remarks>
+ /// This is different from ToString in that ToString
+ /// is supposed to be there for debugging purposes,
+ /// and is not guaranteed to be useful for anything else,
+ /// AsString() will provide something that can be used
+ /// for round-tripping C# code. Maybe it can be used
+ /// for IL assembly as well.
+ /// </remarks>
+ public abstract string AsString ();
+
+ override public string ToString ()
+ {
+ return this.GetType ().Name + " (" + AsString () + ")";
+ }
+
+ /// <summary>
+ /// This is used to obtain the actual value of the literal
+ /// cast into an object.
+ /// </summary>
+ public abstract object GetValue ();
+
+ /// <summary>
+ /// Constants are always born in a fully resolved state
+ /// </summary>
+ public override Expression DoResolve (EmitContext ec)
+ {
+ return this;
+ }
+
+ //
+ // The various ToXXXX conversion functions are used by the constant
+ // folding evaluator. A null value is returned if the conversion is
+ // not possible.
+ //
+ // Note: not all the patterns for catching `implicit_conv' are the same.
+ // some implicit conversions can never be performed between two types
+ // even if the conversion would be lossless (for example short to uint),
+ // but some conversions are explicitly permitted by the standard provided
+ // that there will be no loss of information (for example, int to uint).
+ //
+ public DoubleConstant ToDouble (Location loc)
+ {
+ DoubleConstant c = ConvertToDouble ();
+
+ if (c == null)
+ Error_CannotConvertImplicit (loc, Type, TypeManager.double_type);
+
+ return c;
+ }
+
+ public FloatConstant ToFloat (Location loc)
+ {
+ FloatConstant c = ConvertToFloat ();
+
+ if (c == null)
+ Error_CannotConvertImplicit (loc, Type, TypeManager.float_type);
+
+ return c;
+ }
+
+ public ULongConstant ToULong (Location loc)
+ {
+ ULongConstant c = ConvertToULong ();
+
+ if (c == null)
+ Error_CannotConvertImplicit (loc, Type, TypeManager.uint64_type);
+
+ return c;
+ }
+
+ public LongConstant ToLong (Location loc)
+ {
+ LongConstant c = ConvertToLong ();
+
+ if (c == null)
+ Error_CannotConvertImplicit (loc, Type, TypeManager.int64_type);
+
+ return c;
+ }
+
+ public UIntConstant ToUInt (Location loc)
+ {
+ UIntConstant c = ConvertToUInt ();
+
+ if (c == null)
+ Error_CannotConvertImplicit (loc, Type, TypeManager.uint32_type);
+
+ return c;
+ }
+
+ public IntConstant ToInt (Location loc)
+ {
+ IntConstant c = ConvertToInt ();
+
+ if (c == null)
+ Error_CannotConvertImplicit (loc, Type, TypeManager.int32_type);
+
+ return c;
+ }
+
+ public virtual DoubleConstant ConvertToDouble ()
+ {
+ return null;
+ }
+
+ public virtual FloatConstant ConvertToFloat ()
+ {
+ return null;
+ }
+
+ public virtual ULongConstant ConvertToULong ()
+ {
+ return null;
+ }
+
+ public virtual LongConstant ConvertToLong ()
+ {
+ return null;
+ }
+
+ public virtual UIntConstant ConvertToUInt ()
+ {
+ return null;
+ }
+
+ public virtual IntConstant ConvertToInt ()
+ {
+ return null;
+ }
+ }
+
+ public class BoolConstant : Constant {
+ public readonly bool Value;
+
+ public BoolConstant (bool val)
+ {
+ type = TypeManager.bool_type;
+ eclass = ExprClass.Value;
+
+ Value = val;
+ }
+
+ override public string AsString ()
+ {
+ return Value ? "true" : "false";
+ }
+
+ public override object GetValue ()
+ {
+ return (object) Value;
+ }
+
+
+ public override void Emit (EmitContext ec)
+ {
+ if (Value)
+ ec.ig.Emit (OpCodes.Ldc_I4_1);
+ else
+ ec.ig.Emit (OpCodes.Ldc_I4_0);
+ }
+ }
+
+ public class ByteConstant : Constant {
+ public readonly byte Value;
+
+ public ByteConstant (byte v)
+ {
+ type = TypeManager.byte_type;
+ eclass = ExprClass.Value;
+ Value = v;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ IntLiteral.EmitInt (ec.ig, Value);
+ }
+
+ public override string AsString ()
+ {
+ return Value.ToString ();
+ }
+
+ public override object GetValue ()
+ {
+ return Value;
+ }
+
+ public override DoubleConstant ConvertToDouble ()
+ {
+ return new DoubleConstant (Value);
+ }
+
+ public override FloatConstant ConvertToFloat ()
+ {
+ return new FloatConstant (Value);
+ }
+
+ public override ULongConstant ConvertToULong ()
+ {
+ return new ULongConstant (Value);
+ }
+
+ public override LongConstant ConvertToLong ()
+ {
+ return new LongConstant (Value);
+ }
+
+ public override UIntConstant ConvertToUInt ()
+ {
+ return new UIntConstant (Value);
+ }
+
+ public override IntConstant ConvertToInt ()
+ {
+ return new IntConstant (Value);
+ }
+ }
+
+ public class CharConstant : Constant {
+ public readonly char Value;
+
+ public CharConstant (char v)
+ {
+ type = TypeManager.char_type;
+ eclass = ExprClass.Value;
+ Value = v;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ IntLiteral.EmitInt (ec.ig, Value);
+ }
+
+ static public 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 string AsString ()
+ {
+ return "\"" + descape (Value) + "\"";
+ }
+
+ public override object GetValue ()
+ {
+ return Value;
+ }
+
+ public override DoubleConstant ConvertToDouble ()
+ {
+ return new DoubleConstant (Value);
+ }
+
+ public override FloatConstant ConvertToFloat ()
+ {
+ return new FloatConstant (Value);
+ }
+
+ public override ULongConstant ConvertToULong ()
+ {
+ return new ULongConstant (Value);
+ }
+
+ public override LongConstant ConvertToLong ()
+ {
+ return new LongConstant (Value);
+ }
+
+ public override UIntConstant ConvertToUInt ()
+ {
+ return new UIntConstant (Value);
+ }
+
+ public override IntConstant ConvertToInt ()
+ {
+ return new IntConstant (Value);
+ }
+ }
+
+ public class SByteConstant : Constant {
+ public readonly sbyte Value;
+
+ public SByteConstant (sbyte v)
+ {
+ type = TypeManager.sbyte_type;
+ eclass = ExprClass.Value;
+ Value = v;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ IntLiteral.EmitInt (ec.ig, Value);
+ }
+
+ public override string AsString ()
+ {
+ return Value.ToString ();
+ }
+
+ public override object GetValue ()
+ {
+ return Value;
+ }
+
+ public override DoubleConstant ConvertToDouble ()
+ {
+ return new DoubleConstant (Value);
+ }
+
+ public override FloatConstant ConvertToFloat ()
+ {
+ return new FloatConstant (Value);
+ }
+
+ public override ULongConstant ConvertToULong ()
+ {
+ if (Value >= 0)
+ return new ULongConstant ((ulong) Value);
+
+ return null;
+ }
+
+ public override LongConstant ConvertToLong ()
+ {
+ return new LongConstant (Value);
+ }
+
+ public override UIntConstant ConvertToUInt ()
+ {
+ return null;
+ }
+
+ public override IntConstant ConvertToInt ()
+ {
+ return new IntConstant (Value);
+ }
+ }
+
+ public class ShortConstant : Constant {
+ public readonly short Value;
+
+ public ShortConstant (short v)
+ {
+ type = TypeManager.short_type;
+ eclass = ExprClass.Value;
+ Value = v;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ IntLiteral.EmitInt (ec.ig, Value);
+ }
+
+ public override string AsString ()
+ {
+ return Value.ToString ();
+ }
+
+ public override object GetValue ()
+ {
+ return Value;
+ }
+
+ public override DoubleConstant ConvertToDouble ()
+ {
+ return new DoubleConstant (Value);
+ }
+
+ public override FloatConstant ConvertToFloat ()
+ {
+ return new FloatConstant (Value);
+ }
+
+ public override ULongConstant ConvertToULong ()
+ {
+ return null;
+ }
+
+ public override LongConstant ConvertToLong ()
+ {
+ return new LongConstant (Value);
+ }
+
+ public override UIntConstant ConvertToUInt ()
+ {
+ return null;
+ }
+
+ public override IntConstant ConvertToInt ()
+ {
+ return new IntConstant (Value);
+ }
+ }
+
+ public class UShortConstant : Constant {
+ public readonly ushort Value;
+
+ public UShortConstant (ushort v)
+ {
+ type = TypeManager.ushort_type;
+ eclass = ExprClass.Value;
+ Value = v;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ IntLiteral.EmitInt (ec.ig, Value);
+ }
+
+ public override string AsString ()
+ {
+ return Value.ToString ();
+ }
+
+ public override object GetValue ()
+ {
+ return Value;
+ }
+
+ public override DoubleConstant ConvertToDouble ()
+ {
+ return new DoubleConstant (Value);
+ }
+
+ public override FloatConstant ConvertToFloat ()
+ {
+ return new FloatConstant (Value);
+ }
+
+ public override ULongConstant ConvertToULong ()
+ {
+ return new ULongConstant (Value);
+ }
+
+ public override LongConstant ConvertToLong ()
+ {
+ return new LongConstant (Value);
+ }
+
+ public override UIntConstant ConvertToUInt ()
+ {
+ return new UIntConstant (Value);
+ }
+
+ public override IntConstant ConvertToInt ()
+ {
+ return new IntConstant (Value);
+ }
+ }
+
+ public class IntConstant : Constant {
+ public readonly int Value;
+
+ public IntConstant (int v)
+ {
+ type = TypeManager.int32_type;
+ eclass = ExprClass.Value;
+ Value = v;
+ }
+
+ static public void EmitInt (ILGenerator ig, int i)
+ {
+ switch (i){
+ case -1:
+ ig.Emit (OpCodes.Ldc_I4_M1);
+ break;
+
+ case 0:
+ ig.Emit (OpCodes.Ldc_I4_0);
+ break;
+
+ case 1:
+ ig.Emit (OpCodes.Ldc_I4_1);
+ break;
+
+ case 2:
+ ig.Emit (OpCodes.Ldc_I4_2);
+ break;
+
+ case 3:
+ ig.Emit (OpCodes.Ldc_I4_3);
+ break;
+
+ case 4:
+ ig.Emit (OpCodes.Ldc_I4_4);
+ break;
+
+ case 5:
+ ig.Emit (OpCodes.Ldc_I4_5);
+ break;
+
+ case 6:
+ ig.Emit (OpCodes.Ldc_I4_6);
+ break;
+
+ case 7:
+ ig.Emit (OpCodes.Ldc_I4_7);
+ break;
+
+ case 8:
+ ig.Emit (OpCodes.Ldc_I4_8);
+ break;
+
+ default:
+ if (i >= -128 && i <= 127){
+ ig.Emit (OpCodes.Ldc_I4_S, (sbyte) i);
+ } else
+ ig.Emit (OpCodes.Ldc_I4, i);
+ break;
+ }
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ EmitInt (ec.ig, Value);
+ }
+
+ public override string AsString ()
+ {
+ return Value.ToString ();
+ }
+
+ public override object GetValue ()
+ {
+ return Value;
+ }
+
+ public override DoubleConstant ConvertToDouble ()
+ {
+ return new DoubleConstant (Value);
+ }
+
+ public override FloatConstant ConvertToFloat ()
+ {
+ return new FloatConstant (Value);
+ }
+
+ public override ULongConstant ConvertToULong ()
+ {
+ if (Value < 0)
+ return null;
+
+ return new ULongConstant ((ulong) Value);
+ }
+
+ public override LongConstant ConvertToLong ()
+ {
+ return new LongConstant (Value);
+ }
+
+ public override UIntConstant ConvertToUInt ()
+ {
+ if (Value < 0)
+ return null;
+
+ return new UIntConstant ((uint) Value);
+ }
+
+ public override IntConstant ConvertToInt ()
+ {
+ return this;
+ }
+ }
+
+ public class UIntConstant : Constant {
+ public readonly uint Value;
+
+ public UIntConstant (uint v)
+ {
+ type = TypeManager.uint32_type;
+ eclass = ExprClass.Value;
+ Value = v;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ IntLiteral.EmitInt (ec.ig, unchecked ((int) Value));
+ }
+
+ public override string AsString ()
+ {
+ return Value.ToString ();
+ }
+
+ public override object GetValue ()
+ {
+ return Value;
+ }
+
+ public override DoubleConstant ConvertToDouble ()
+ {
+ return new DoubleConstant (Value);
+ }
+
+ public override FloatConstant ConvertToFloat ()
+ {
+ return new FloatConstant (Value);
+ }
+
+ public override ULongConstant ConvertToULong ()
+ {
+ return new ULongConstant (Value);
+ }
+
+ public override LongConstant ConvertToLong ()
+ {
+ return new LongConstant (Value);
+ }
+
+ public override UIntConstant ConvertToUInt ()
+ {
+ return this;
+ }
+
+ public override IntConstant ConvertToInt ()
+ {
+ return null;
+ }
+ }
+
+ public class LongConstant : Constant {
+ public readonly long Value;
+
+ public LongConstant (long v)
+ {
+ type = TypeManager.int64_type;
+ eclass = ExprClass.Value;
+ Value = v;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ ILGenerator ig = ec.ig;
+
+ EmitLong (ig, Value);
+ }
+
+ static public void EmitLong (ILGenerator ig, long l)
+ {
+ ig.Emit (OpCodes.Ldc_I8, l);
+ }
+
+ public override string AsString ()
+ {
+ return Value.ToString ();
+ }
+
+ public override object GetValue ()
+ {
+ return Value;
+ }
+
+ public override DoubleConstant ConvertToDouble ()
+ {
+ return new DoubleConstant (Value);
+ }
+
+ public override FloatConstant ConvertToFloat ()
+ {
+ return new FloatConstant (Value);
+ }
+
+ public override ULongConstant ConvertToULong ()
+ {
+ if (Value < 0)
+ return null;
+
+ return new ULongConstant ((ulong) Value);
+ }
+
+ public override LongConstant ConvertToLong ()
+ {
+ return this;
+ }
+
+ public override UIntConstant ConvertToUInt ()
+ {
+ return null;
+ }
+
+ public override IntConstant ConvertToInt ()
+ {
+ return null;
+ }
+ }
+
+ public class ULongConstant : Constant {
+ public readonly ulong Value;
+
+ public ULongConstant (ulong v)
+ {
+ type = TypeManager.uint64_type;
+ eclass = ExprClass.Value;
+ Value = v;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ ILGenerator ig = ec.ig;
+
+ LongLiteral.EmitLong (ig, unchecked ((long) Value));
+ }
+
+ public override string AsString ()
+ {
+ return Value.ToString ();
+ }
+
+ public override object GetValue ()
+ {
+ return Value;
+ }
+
+ public override DoubleConstant ConvertToDouble ()
+ {
+ return new DoubleConstant (Value);
+ }
+
+ public override FloatConstant ConvertToFloat ()
+ {
+ return new FloatConstant (Value);
+ }
+
+ public override ULongConstant ConvertToULong ()
+ {
+ return this;
+ }
+
+ public override LongConstant ConvertToLong ()
+ {
+ return null;
+ }
+
+ public override UIntConstant ConvertToUInt ()
+ {
+ return null;
+ }
+
+ public override IntConstant ConvertToInt ()
+ {
+ return null;
+ }
+ }
+
+ public class FloatConstant : Constant {
+ public readonly float Value;
+
+ public FloatConstant (float v)
+ {
+ type = TypeManager.float_type;
+ eclass = ExprClass.Value;
+ Value = v;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ ec.ig.Emit (OpCodes.Ldc_R4, Value);
+ }
+
+ public override string AsString ()
+ {
+ return Value.ToString ();
+ }
+
+ public override object GetValue ()
+ {
+ return Value;
+ }
+
+ public override DoubleConstant ConvertToDouble ()
+ {
+ return new DoubleConstant (Value);
+ }
+
+ public override FloatConstant ConvertToFloat ()
+ {
+ return this;
+ }
+
+ public override LongConstant ConvertToLong ()
+ {
+ return null;
+ }
+
+ public override UIntConstant ConvertToUInt ()
+ {
+ return null;
+ }
+
+ public override IntConstant ConvertToInt ()
+ {
+ return null;
+ }
+ }
+
+ public class DoubleConstant : Constant {
+ public readonly double Value;
+
+ public DoubleConstant (double v)
+ {
+ type = TypeManager.double_type;
+ eclass = ExprClass.Value;
+ Value = v;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ ec.ig.Emit (OpCodes.Ldc_R8, Value);
+ }
+
+ public override string AsString ()
+ {
+ return Value.ToString ();
+ }
+
+ public override object GetValue ()
+ {
+ return Value;
+ }
+
+ public override DoubleConstant ConvertToDouble ()
+ {
+ return this;
+ }
+
+ public override FloatConstant ConvertToFloat ()
+ {
+ return null;
+ }
+
+ public override ULongConstant ConvertToULong ()
+ {
+ return null;
+ }
+
+ public override LongConstant ConvertToLong ()
+ {
+ return null;
+ }
+
+ public override UIntConstant ConvertToUInt ()
+ {
+ return null;
+ }
+
+ public override IntConstant ConvertToInt ()
+ {
+ return null;
+ }
+ }
+
+ public class DecimalConstant : Constant {
+ public readonly decimal Value;
+
+ public DecimalConstant (decimal d)
+ {
+ type = TypeManager.decimal_type;
+ eclass = ExprClass.Value;
+ Value = d;
+ }
+
+ override public string AsString ()
+ {
+ return Value.ToString ();
+ }
+
+ public override object GetValue ()
+ {
+ return (object) Value;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ int [] words = Decimal.GetBits (Value);
+
+ //
+ // FIXME: we could optimize this, and call a better
+ // constructor
+ //
+
+ ILGenerator ig = ec.ig;
+
+ IntConstant.EmitInt (ig, words [0]);
+ IntConstant.EmitInt (ig, words [1]);
+ IntConstant.EmitInt (ig, words [2]);
+
+ // sign
+ IntConstant.EmitInt (ig, words [3] >> 31);
+
+ // power
+ IntConstant.EmitInt (ig, (words [3] >> 16) & 0xff);
+
+ ig.Emit (OpCodes.Newobj, TypeManager.void_decimal_ctor_five_args);
+ }
+ }
+
+ public class StringConstant : Constant {
+ public readonly string Value;
+
+ public StringConstant (string s)
+ {
+ type = TypeManager.string_type;
+ eclass = ExprClass.Value;
+ Value = s;
+ }
+
+ // FIXME: Escape the string.
+ override public string AsString ()
+ {
+ return "\"" + Value + "\"";
+ }
+
+ public override object GetValue ()
+ {
+ return Value;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ ec.ig.Emit (OpCodes.Ldstr, Value);
+ }
+ }
+
+}
+
+
projects / mono.git / blobdiff