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//
// literal.cs: Literal representation for the IL tree.
//
// Author:
// Miguel de Icaza (miguel@ximian.com)
//
// (C) 2001 Ximian, Inc.
//
//
// Notice that during parsing we create objects of type Literal, but the
// types are not loaded (thats why the Resolve method has to assign the
// type at that point).
//
// Literals differ from the constants in that we know we encountered them
// as a literal in the source code (and some extra rules apply there) and
// they have to be resolved (since during parsing we have not loaded the
// types yet) while constants are created only after types have been loaded
// and are fully resolved when born.
//
using System;
using System.Reflection;
using System.Reflection.Emit;
namespace Mono.CSharp {
public class NullLiteral : Constant {
public static readonly NullLiteral Null;
static NullLiteral ()
{
Null = new NullLiteral ();
}
public NullLiteral ()
{
if (Null != null)
throw new Exception ("More than one null has been created!");
eclass = ExprClass.Value;
}
override public string AsString ()
{
return "null";
}
public override object GetValue ()
{
return null;
}
public override Expression DoResolve (EmitContext ec)
{
type = TypeManager.object_type;
return this;
}
public override void Emit (EmitContext ec)
{
ec.ig.Emit (OpCodes.Ldnull);
}
}
public class BoolLiteral : BoolConstant {
public BoolLiteral (bool val) : base (val)
{
}
public override Expression DoResolve (EmitContext ec)
{
type = TypeManager.bool_type;
return this;
}
}
public class CharLiteral : CharConstant {
public CharLiteral (char c) : base (c)
{
}
public override Expression DoResolve (EmitContext ec)
{
type = TypeManager.char_type;
return this;
}
}
public class IntLiteral : IntConstant {
public IntLiteral (int l) : base (l)
{
}
public override Expression DoResolve (EmitContext ec)
{
type = TypeManager.int32_type;
return this;
}
}
public class UIntLiteral : UIntConstant {
public UIntLiteral (uint l) : base (l)
{
}
public override Expression DoResolve (EmitContext ec)
{
type = TypeManager.uint32_type;
return this;
}
}
public class LongLiteral : LongConstant {
public LongLiteral (long l) : base (l)
{
}
public override Expression DoResolve (EmitContext ec)
{
type = TypeManager.int64_type;
return this;
}
}
public class ULongLiteral : ULongConstant {
public ULongLiteral (ulong l) : base (l)
{
}
public override Expression DoResolve (EmitContext ec)
{
type = TypeManager.uint64_type;
return this;
}
}
public class FloatLiteral : FloatConstant {
public FloatLiteral (float f) : base (f)
{
}
public override Expression DoResolve (EmitContext ec)
{
type = TypeManager.float_type;
return this;
}
}
public class DoubleLiteral : DoubleConstant {
public DoubleLiteral (double d) : base (d)
{
}
public override Expression DoResolve (EmitContext ec)
{
type = TypeManager.double_type;
return this;
}
}
public class DecimalLiteral : DecimalConstant {
public DecimalLiteral (decimal d) : base (d)
{
}
public override Expression DoResolve (EmitContext ec)
{
type = TypeManager.decimal_type;
return this;
}
}
public class StringLiteral : StringConstant {
public StringLiteral (string s) : base (s)
{
}
public override Expression DoResolve (EmitContext ec)
{
type = TypeManager.string_type;
return this;
}
}
}
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