public FloatingConstant(ISyntaxNode parent, ref string Input)
: base(parent)
{
Pattern regExPattern =
"^\\s*" +
new Group("def",
new Group("signess", "[+-]") +
"?" +
new Group("nums",
new Group("pre_comma", "\\d+") +
"(\\." +
new Group("post_comma", "\\d+") +
")?([eE]" +
new Group("exp", "-?\\d+") +
")?"));
System.Text.RegularExpressions.Regex regEx = new System.Text.RegularExpressions.Regex(regExPattern);
System.Text.RegularExpressions.Match match = regEx.Match(Input);
if (!match.Success)
throw new ParseException();
//if (match.Index != 0)
// throw new ParseException();
Input = Input.Remove(0, match.Index + match.Length);
string value = match.Groups["nums"].Value;
try
{
Value = Convert.ToDouble(value);
I_Type = AtomicTypeSpecifier.Double(this);
}
catch (OverflowException)
{
throw new SyntaxException("syntax error: value \"" + value + "\" is too large for a floating value.");
}
}
public IntegerConstant(ISyntaxNode parent, ref string Input)
: base(parent)
{
Pattern regExPattern =
"^\\s*" +
new Group("def",
new Group ("signess", "[+-]") +
"?" +
new Group("base", "0[xbo]") +
"?" +
new Group("nums", "\\d+"));
System.Text.RegularExpressions.Regex regEx = new System.Text.RegularExpressions.Regex(regExPattern);
System.Text.RegularExpressions.Match match = regEx.Match(Input);
if (!match.Success)
throw new ParseException();
//if (match.Index != 0)
// throw new ParseException();
Input = Input.Remove(0, match.Index + match.Length);
string value = match.Groups["nums"].Value;
int numBase = 10;
switch (match.Groups["base"].Value)
{
case "":
numBase = 10;
break;
case "0x":
case "0X":
numBase = 16;
break;
case "0o":
case "oO":
numBase = 8;
break;
case "0b":
case "0B":
numBase = 2;
break;
}
try
{
Value = Convert.ToInt32(value, numBase);
if (match.Groups["signess"].Value == "-")
Value = (Int32)Value * -1;
I_Type = AtomicTypeSpecifier.Int(this);
}
catch (OverflowException)
{
try
{
Value = Convert.ToInt64(value, numBase);
if (match.Groups["signess"].Value == "-")
Value = (Int64)Value * -1;
I_Type = AtomicTypeSpecifier.Long(this);
}
catch (OverflowException)
{
try
{
Value = Convert.ToUInt64(value);
if (match.Groups["signess"].Value == "-")
throw new SyntaxException("syntax error: value \"" + value + "\" is too large for a signed integer value.");
I_Type = AtomicTypeSpecifier.ULong(this);
}
catch (OverflowException)
{
throw new SyntaxException("syntax error: value \"" + value + "\" is too large for a integer value.");
}
}
}
}
public override bool Equals(ITypeSpecifier other)
{
AtomicTypeSpecifier o = other as AtomicTypeSpecifier;
if (o == null)
return false;
return ((o.TypeName.ToLower() == this.TypeName.ToLower()) && (o.Unsigned == this.Unsigned));
}
public override bool CanImplicitCastFrom(ITypeSpecifier type)
{
switch (TypeName)
{
case "void":
return false;
case "char":
case "short":
case "int":
case "long":
switch (type.TypeName)
{
case "char":
case "short":
case "int":
case "long":
return true;
default:
return false;
}
case "float":
case "double":
switch (type.TypeName)
{
case "float":
case "double":
return true;
default:
return false;
}
default:
return false;
}
}
