/NRefactory/ICSharpCode.NRefactory.CSharp/Parser/mcs/constant.cs
C# | 2496 lines | 2030 code | 358 blank | 108 comment | 389 complexity | 8d98d5b9f24e6fb154dec2af4eab76ca MD5 | raw file
Possible License(s): LGPL-2.1, MIT, CC-BY-SA-3.0
- //
- // constant.cs: Constants.
- //
- // Author:
- // Miguel de Icaza (miguel@ximian.com)
- // Marek Safar (marek.safar@gmail.com)
- //
- // Copyright 2001-2003 Ximian, Inc.
- // Copyright 2003-2008 Novell, Inc.
- // Copyright 2011-2013 Xamarin Inc
- //
- using System;
- using System.Globalization;
- #if STATIC
- using IKVM.Reflection.Emit;
- #else
- using System.Reflection.Emit;
- #endif
- namespace Mono.CSharp {
- /// <summary>
- /// Base class for constants and literals.
- /// </summary>
- public abstract class Constant : Expression
- {
- static readonly NumberFormatInfo nfi = CultureInfo.InvariantCulture.NumberFormat;
- protected Constant (Location loc)
- {
- this.loc = loc;
- }
- override public string ToString ()
- {
- return this.GetType ().Name + " (" + GetValueAsLiteral () + ")";
- }
- /// <summary>
- /// This is used to obtain the actual value of the literal
- /// cast into an object.
- /// </summary>
- public abstract object GetValue ();
- public abstract long GetValueAsLong ();
- public abstract string GetValueAsLiteral ();
- #if !STATIC
- //
- // Returns an object value which is typed to contant type
- //
- public virtual object GetTypedValue ()
- {
- return GetValue ();
- }
- #endif
- public override void Error_ValueCannotBeConverted (ResolveContext ec, TypeSpec target, bool expl)
- {
- if (!expl && IsLiteral &&
- BuiltinTypeSpec.IsPrimitiveTypeOrDecimal (target) &&
- BuiltinTypeSpec.IsPrimitiveTypeOrDecimal (type)) {
- ec.Report.Error (31, loc, "Constant value `{0}' cannot be converted to a `{1}'",
- GetValueAsLiteral (), target.GetSignatureForError ());
- } else {
- base.Error_ValueCannotBeConverted (ec, target, expl);
- }
- }
- public Constant ImplicitConversionRequired (ResolveContext ec, TypeSpec type)
- {
- Constant c = ConvertImplicitly (type);
- if (c == null)
- Error_ValueCannotBeConverted (ec, type, false);
- return c;
- }
- public override bool ContainsEmitWithAwait ()
- {
- return false;
- }
- public virtual Constant ConvertImplicitly (TypeSpec type)
- {
- if (this.type == type)
- return this;
- if (!Convert.ImplicitNumericConversionExists (this.type, type))
- return null;
- bool fail;
- object constant_value = ChangeType (GetValue (), type, out fail);
- if (fail){
- //
- // We should always catch the error before this is ever
- // reached, by calling Convert.ImplicitStandardConversionExists
- //
- throw new InternalErrorException ("Missing constant conversion between `{0}' and `{1}'",
- Type.GetSignatureForError (), type.GetSignatureForError ());
- }
- return CreateConstantFromValue (type, constant_value, loc);
- }
- //
- // Returns a constant instance based on Type
- //
- public static Constant CreateConstantFromValue (TypeSpec t, object v, Location loc)
- {
- switch (t.BuiltinType) {
- case BuiltinTypeSpec.Type.Int:
- return new IntConstant (t, (int) v, loc);
- case BuiltinTypeSpec.Type.String:
- return new StringConstant (t, (string) v, loc);
- case BuiltinTypeSpec.Type.UInt:
- return new UIntConstant (t, (uint) v, loc);
- case BuiltinTypeSpec.Type.Long:
- return new LongConstant (t, (long) v, loc);
- case BuiltinTypeSpec.Type.ULong:
- return new ULongConstant (t, (ulong) v, loc);
- case BuiltinTypeSpec.Type.Float:
- return new FloatConstant (t, (float) v, loc);
- case BuiltinTypeSpec.Type.Double:
- return new DoubleConstant (t, (double) v, loc);
- case BuiltinTypeSpec.Type.Short:
- return new ShortConstant (t, (short) v, loc);
- case BuiltinTypeSpec.Type.UShort:
- return new UShortConstant (t, (ushort) v, loc);
- case BuiltinTypeSpec.Type.SByte:
- return new SByteConstant (t, (sbyte) v, loc);
- case BuiltinTypeSpec.Type.Byte:
- return new ByteConstant (t, (byte) v, loc);
- case BuiltinTypeSpec.Type.Char:
- return new CharConstant (t, (char) v, loc);
- case BuiltinTypeSpec.Type.Bool:
- return new BoolConstant (t, (bool) v, loc);
- case BuiltinTypeSpec.Type.Decimal:
- return new DecimalConstant (t, (decimal) v, loc);
- }
- if (t.IsEnum) {
- var real_type = EnumSpec.GetUnderlyingType (t);
- return new EnumConstant (CreateConstantFromValue (real_type, v, loc), t);
- }
- if (v == null) {
- if (t.IsNullableType)
- return Nullable.LiftedNull.Create (t, loc);
- if (TypeSpec.IsReferenceType (t))
- return new NullConstant (t, loc);
- }
- #if STATIC
- throw new InternalErrorException ("Constant value `{0}' has unexpected underlying type `{1}'", v, t.GetSignatureForError ());
- #else
- return null;
- #endif
- }
- //
- // Returns a constant instance based on value and type. This is probing version of
- // CreateConstantFromValue
- //
- public static Constant ExtractConstantFromValue (TypeSpec t, object v, Location loc)
- {
- switch (t.BuiltinType) {
- case BuiltinTypeSpec.Type.Int:
- if (v is int)
- return new IntConstant (t, (int) v, loc);
- break;
- case BuiltinTypeSpec.Type.String:
- if (v is string)
- return new StringConstant (t, (string) v, loc);
- break;
- case BuiltinTypeSpec.Type.UInt:
- if (v is uint)
- return new UIntConstant (t, (uint) v, loc);
- break;
- case BuiltinTypeSpec.Type.Long:
- if (v is long)
- return new LongConstant (t, (long) v, loc);
- break;
- case BuiltinTypeSpec.Type.ULong:
- if (v is ulong)
- return new ULongConstant (t, (ulong) v, loc);
- break;
- case BuiltinTypeSpec.Type.Float:
- if (v is float)
- return new FloatConstant (t, (float) v, loc);
- break;
- case BuiltinTypeSpec.Type.Double:
- if (v is double)
- return new DoubleConstant (t, (double) v, loc);
- break;
- case BuiltinTypeSpec.Type.Short:
- if (v is short)
- return new ShortConstant (t, (short) v, loc);
- break;
- case BuiltinTypeSpec.Type.UShort:
- if (v is ushort)
- return new UShortConstant (t, (ushort) v, loc);
- break;
- case BuiltinTypeSpec.Type.SByte:
- if (v is sbyte)
- return new SByteConstant (t, (sbyte) v, loc);
- break;
- case BuiltinTypeSpec.Type.Byte:
- if (v is byte)
- return new ByteConstant (t, (byte) v, loc);
- break;
- case BuiltinTypeSpec.Type.Char:
- if (v is char)
- return new CharConstant (t, (char) v, loc);
- break;
- case BuiltinTypeSpec.Type.Bool:
- if (v is bool)
- return new BoolConstant (t, (bool) v, loc);
- break;
- case BuiltinTypeSpec.Type.Decimal:
- if (v is decimal)
- return new DecimalConstant (t, (decimal) v, loc);
- break;
- }
- if (t.IsEnum) {
- var real_type = EnumSpec.GetUnderlyingType (t);
- return new EnumConstant (CreateConstantFromValue (real_type, v, loc), t);
- }
- if (v == null) {
- if (t.IsNullableType)
- return Nullable.LiftedNull.Create (t, loc);
- if (TypeSpec.IsReferenceType (t))
- return new NullConstant (t, loc);
- }
- return null;
- }
- public override Expression CreateExpressionTree (ResolveContext ec)
- {
- Arguments args = new Arguments (2);
- args.Add (new Argument (this));
- args.Add (new Argument (new TypeOf (type, loc)));
- return CreateExpressionFactoryCall (ec, "Constant", args);
- }
- /// <summary>
- /// Maybe ConvertTo name is better. It tries to convert `this' constant to target_type.
- /// It throws OverflowException
- /// </summary>
- // DON'T CALL THIS METHOD DIRECTLY AS IT DOES NOT HANDLE ENUMS
- public abstract Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type);
- // This is a custom version of Convert.ChangeType() which works
- // with the TypeBuilder defined types when compiling corlib.
- static object ChangeType (object value, TypeSpec targetType, out bool error)
- {
- IConvertible convert_value = value as IConvertible;
- if (convert_value == null) {
- error = true;
- return null;
- }
- //
- // We cannot rely on build-in type conversions as they are
- // more limited than what C# supports.
- // See char -> float/decimal/double conversion
- //
- error = false;
- try {
- switch (targetType.BuiltinType) {
- case BuiltinTypeSpec.Type.Bool:
- return convert_value.ToBoolean (nfi);
- case BuiltinTypeSpec.Type.Byte:
- return convert_value.ToByte (nfi);
- case BuiltinTypeSpec.Type.Char:
- return convert_value.ToChar (nfi);
- case BuiltinTypeSpec.Type.Short:
- return convert_value.ToInt16 (nfi);
- case BuiltinTypeSpec.Type.Int:
- return convert_value.ToInt32 (nfi);
- case BuiltinTypeSpec.Type.Long:
- return convert_value.ToInt64 (nfi);
- case BuiltinTypeSpec.Type.SByte:
- return convert_value.ToSByte (nfi);
- case BuiltinTypeSpec.Type.Decimal:
- if (convert_value.GetType () == typeof (char))
- return (decimal) convert_value.ToInt32 (nfi);
- return convert_value.ToDecimal (nfi);
- case BuiltinTypeSpec.Type.Double:
- if (convert_value.GetType () == typeof (char))
- return (double) convert_value.ToInt32 (nfi);
- return convert_value.ToDouble (nfi);
- case BuiltinTypeSpec.Type.Float:
- if (convert_value.GetType () == typeof (char))
- return (float) convert_value.ToInt32 (nfi);
- return convert_value.ToSingle (nfi);
- case BuiltinTypeSpec.Type.String:
- return convert_value.ToString (nfi);
- case BuiltinTypeSpec.Type.UShort:
- return convert_value.ToUInt16 (nfi);
- case BuiltinTypeSpec.Type.UInt:
- return convert_value.ToUInt32 (nfi);
- case BuiltinTypeSpec.Type.ULong:
- return convert_value.ToUInt64 (nfi);
- case BuiltinTypeSpec.Type.Object:
- return value;
- }
- } catch {
- }
- error = true;
- return null;
- }
- protected override Expression DoResolve (ResolveContext rc)
- {
- return this;
- }
- //
- // Attempts to do a compile-time folding of a constant cast and handles
- // error reporting for constant overlows only, on normal conversion
- // errors returns null
- //
- public Constant Reduce (ResolveContext ec, TypeSpec target_type)
- {
- try {
- return TryReduceConstant (ec, target_type);
- } catch (OverflowException) {
- if (ec.ConstantCheckState && Type.BuiltinType != BuiltinTypeSpec.Type.Decimal) {
- ec.Report.Error (221, loc,
- "Constant value `{0}' cannot be converted to a `{1}' (use `unchecked' syntax to override)",
- GetValueAsLiteral (), target_type.GetSignatureForError ());
- } else {
- Error_ValueCannotBeConverted (ec, target_type, false);
- }
- return New.Constantify (target_type, loc);
- }
- }
- public Constant TryReduce (ResolveContext rc, TypeSpec targetType)
- {
- try {
- return TryReduceConstant (rc, targetType);
- } catch (OverflowException) {
- return null;
- }
- }
- Constant TryReduceConstant (ResolveContext ec, TypeSpec target_type)
- {
- if (Type == target_type) {
- //
- // Reducing literal value produces a new constant. Syntactically 10 is not same as (int)10
- //
- if (IsLiteral)
- return CreateConstantFromValue (target_type, GetValue (), loc);
- return this;
- }
- Constant c;
- if (target_type.IsEnum) {
- c = TryReduceConstant (ec, EnumSpec.GetUnderlyingType (target_type));
- if (c == null)
- return null;
- return new EnumConstant (c, target_type);
- }
- return ConvertExplicitly (ec.ConstantCheckState, target_type);
- }
- /// <summary>
- /// Need to pass type as the constant can require a boxing
- /// and in such case no optimization is possible
- /// </summary>
- public bool IsDefaultInitializer (TypeSpec type)
- {
- if (type == Type)
- return IsDefaultValue;
- return this is NullLiteral;
- }
- public abstract bool IsDefaultValue {
- get;
- }
- public abstract bool IsNegative {
- get;
- }
- //
- // When constant is declared as literal
- //
- public virtual bool IsLiteral {
- get { return false; }
- }
-
- public virtual bool IsOneInteger {
- get { return false; }
- }
- public override bool IsSideEffectFree {
- get {
- return true;
- }
- }
- //
- // Returns true iff 1) the stack type of this is one of Object,
- // int32, int64 and 2) this == 0 or this == null.
- //
- public virtual bool IsZeroInteger {
- get { return false; }
- }
- public override void EmitSideEffect (EmitContext ec)
- {
- // do nothing
- }
- public sealed override Expression Clone (CloneContext clonectx)
- {
- // No cloning is not needed for constants
- return this;
- }
- protected override void CloneTo (CloneContext clonectx, Expression target)
- {
- throw new NotSupportedException ("should not be reached");
- }
- public override System.Linq.Expressions.Expression MakeExpression (BuilderContext ctx)
- {
- #if STATIC
- return base.MakeExpression (ctx);
- #else
- return System.Linq.Expressions.Expression.Constant (GetTypedValue (), type.GetMetaInfo ());
- #endif
- }
- public new bool Resolve (ResolveContext rc)
- {
- // It exists only as hint not to call Resolve on constants
- return true;
- }
-
- public override object Accept (StructuralVisitor visitor)
- {
- return visitor.Visit (this);
- }
- }
- public abstract class IntegralConstant : Constant
- {
- protected IntegralConstant (TypeSpec type, Location loc)
- : base (loc)
- {
- this.type = type;
- eclass = ExprClass.Value;
- }
- public override void Error_ValueCannotBeConverted (ResolveContext ec, TypeSpec target, bool expl)
- {
- try {
- ConvertExplicitly (true, target);
- base.Error_ValueCannotBeConverted (ec, target, expl);
- }
- catch
- {
- ec.Report.Error (31, loc, "Constant value `{0}' cannot be converted to a `{1}'",
- GetValue ().ToString (), target.GetSignatureForError ());
- }
- }
- public override string GetValueAsLiteral ()
- {
- return GetValue ().ToString ();
- }
-
- public abstract Constant Increment ();
- }
-
- public class BoolConstant : Constant {
- public readonly bool Value;
- public BoolConstant (BuiltinTypes types, bool val, Location loc)
- : this (types.Bool, val, loc)
- {
- }
-
- public BoolConstant (TypeSpec type, bool val, Location loc)
- : base (loc)
- {
- eclass = ExprClass.Value;
- this.type = type;
- Value = val;
- }
- public override object GetValue ()
- {
- return (object) Value;
- }
- public override string GetValueAsLiteral ()
- {
- return Value ? "true" : "false";
- }
- public override long GetValueAsLong ()
- {
- return Value ? 1 : 0;
- }
- public override void EncodeAttributeValue (IMemberContext rc, AttributeEncoder enc, TypeSpec targetType, TypeSpec parameterType)
- {
- enc.Encode (Value);
- }
-
- public override void Emit (EmitContext ec)
- {
- if (Value)
- ec.EmitInt (1);
- else
- ec.EmitInt (0);
- }
- public override bool IsDefaultValue {
- get {
- return !Value;
- }
- }
- public override bool IsNegative {
- get {
- return false;
- }
- }
-
- public override bool IsZeroInteger {
- get { return Value == false; }
- }
- public override Constant ConvertExplicitly (bool in_checked_context, TypeSpec target_type)
- {
- return null;
- }
- }
- public class ByteConstant : IntegralConstant
- {
- public readonly byte Value;
- public ByteConstant (BuiltinTypes types, byte v, Location loc)
- : this (types.Byte, v, loc)
- {
- }
- public ByteConstant (TypeSpec type, byte 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 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 ();
- }
- 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 ();
- }
- 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 () + "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;
- }
- }
- }
- ec.Emit (OpCodes.Ldstr, Value);
- }
- 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");
- if (sn.HasTypeArguments) {
- // TODO: csc compatible but unhelpful error message
- rc.Report.Error (1001, loc, "Identifier expected");
- return true;
- }
- sn.LookupNameExpression (rc, MemberLookupRestrictions.IgnoreArity | MemberLookupRestrictions.IgnoreAmbiguity);
- return true;
- }
- var ma = expr as MemberAccess;
- if (ma != null) {
- FullNamedExpression fne = ma.LeftExpression as ATypeNameExpression;
- if (fne == null) {
- var qam = ma as QualifiedAliasMember;
- if (qam == null)
- return false;
- fne = qam.CreateExpressionFromAlias (rc);
- if (fne == null)
- return true;
- }
- Value = ma.Name;
- if (rc.Module.Compiler.Settings.Version < LanguageVersion.V_6)
- rc.Report.FeatureIsNotAvailable (rc.Module.Compiler, Location, "nameof operator");
- if (ma.HasTypeArguments) {
- // TODO: csc compatible but unhelpful error message
- rc.Report.Error (1001, loc, "Identifier expected");
- return true;
- }
-
- var left = fne.ResolveAsTypeOrNamespace (rc, true);
- if (left == null)
- return true;
- var ns = left as NamespaceExpression;
- if (ns != null) {
- FullNamedExpression retval = ns.LookupTypeOrNamespace (rc, ma.Name, 0, LookupMode.NameOf, loc);
- if (retval == null)
- ns.Error_NamespaceDoesNotExist (rc, ma.Name, 0);
- return true;
- }
- if (left.Type.IsGenericOrParentIsGeneric && left.Type.GetDefinition () != left.Type) {
- rc.Report.Error (8071, loc, "Type arguments are not allowed in the nameof operator");
- }
- var mexpr = MemberLookup (rc, false, left.Type, ma.Name, 0, MemberLookupRestrictions.IgnoreArity | MemberLookupRestrictions.IgnoreAmbiguity, loc);
- if (mexpr == null) {
- ma.Error_IdentifierNotFound (rc, left.Type);
- return true;
- }
- 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) {
- name.Error_NameDoesNotExist (rc);
- 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;
- }
- }
- }