object IAstVisitor.Visit(LiteralValue literalValue)
{
return Visit(literalValue);
}
protected virtual object Visit(LiteralValue literalValue)
{
object ret;
switch (literalValue.ValueType)
{
case LiteralValueType.Numeric:
{
sbyte signedByte;
byte usignedByte;
short signedShort;
ushort unsignedShort;
int signedInt;
uint unsignedInt;
long signedLong;
ulong unsignedLong;
Single single;
Double dble;
Decimal dec;
BigInteger bigInt;
if (byte.TryParse(literalValue.Value, NumberStyles.Any, this._culture, out usignedByte))
ret = usignedByte;
else if (sbyte.TryParse(literalValue.Value, NumberStyles.Any, this._culture, out signedByte))
ret = signedByte;
else if (short.TryParse(literalValue.Value, NumberStyles.Any, this._culture, out signedShort))
ret = signedShort;
else if (ushort.TryParse(literalValue.Value, NumberStyles.Any, this._culture, out unsignedShort))
ret = unsignedShort;
else if (int.TryParse(literalValue.Value, NumberStyles.Any, this._culture, out signedInt))
ret = signedInt;
else if (uint.TryParse(literalValue.Value, NumberStyles.Any, this._culture, out unsignedInt))
ret = unsignedInt;
else if (long.TryParse(literalValue.Value, NumberStyles.Any, this._culture, out signedLong))
ret = signedLong;
else if (ulong.TryParse(literalValue.Value, NumberStyles.Any, this._culture, out unsignedLong))
ret = unsignedLong;
else if (Single.TryParse(literalValue.Value, NumberStyles.Any, this._culture, out single))
ret = single;
else if (Double.TryParse(literalValue.Value, NumberStyles.Any, this._culture, out dble))
ret = dble;
else if (Decimal.TryParse(literalValue.Value, NumberStyles.Any, this._culture, out dec))
ret = dec;
else if (BigInteger.TryParse(literalValue.Value, NumberStyles.Any, this._culture, out bigInt))
ret = bigInt;
else
ret = literalValue.Value;
IEnumerable<Exception> exceptions;
if (!this._typeConverter.TryConvertType(this._culture, this._targetType.Peek(), ref ret, out exceptions))
{
this.RaiseError(new TypeError(this._targetType.Peek(), ret, literalValue, exceptions));
}
}
break;
case LiteralValueType.String:
ret = literalValue.Value;
if (this._targetType.Peek() != typeof (string))
{
IEnumerable<Exception> exceptions;
if (!this._typeConverter.TryConvertType(this._culture, this._targetType.Peek(), ref ret, out exceptions))
{
this.RaiseError(new TypeError(this._targetType.Peek(), literalValue.Value, literalValue,
exceptions));
}
}
break;
case LiteralValueType.Null:
ret = null;
break;
case LiteralValueType.Boolean:
ret = StringComparer.InvariantCultureIgnoreCase.Equals(literalValue.Value, "$true");
if (this._targetType.Peek() != typeof (bool))
{
IEnumerable<Exception> exceptions;
if (!this._typeConverter.TryConvertType(this._culture, this._targetType.Peek(), ref ret, out exceptions))
{
this.RaiseError(new TypeError(this._targetType.Peek(), ret, literalValue,
exceptions));
}
}
break;
default:
throw new ArgumentOutOfRangeException();
}
return ret;
}
protected virtual AstNode GetAstNode(IEnumerator<Token> enumerator)
{
AstNode ret;
switch (enumerator.Current.Type)
{
case TokenType.ParameterName:
ret = new ParameterName(enumerator.Current,
enumerator.Current.Value);
enumerator.MoveNext();
break;
case TokenType.SwitchParameter:
Token token = enumerator.Current;
enumerator.MoveNext();
ret = new SwitchParameter(token,
token.Value,
this.GetAstNode(enumerator));
break;
case TokenType.NumericValue:
ret = new LiteralValue(
enumerator.Current,
LiteralValueType.Numeric,
enumerator.Current.Value);
enumerator.MoveNext();
break;
case TokenType.StringValue:
ret = new LiteralValue(
enumerator.Current,
LiteralValueType.String,
enumerator.Current.Value);
enumerator.MoveNext();
break;
case TokenType.BoolValue:
ret = new LiteralValue(
enumerator.Current,
LiteralValueType.Boolean,
enumerator.Current.Value);
enumerator.MoveNext();
break;
case TokenType.NullValue:
ret = new LiteralValue(
enumerator.Current,
LiteralValueType.Null,
enumerator.Current.Value);
enumerator.MoveNext();
break;
case TokenType.ListStart:
ret = this.GetSequence(enumerator);
break;
case TokenType.DictionaryStart:
ret = this.GetAssocArray(enumerator);
break;
//case TokenType.DictionaryValueSeperator:
//case TokenType.DictionaryKeySeperator:
case TokenType.DictionaryEnd:
//case TokenType.ListValueSeperator:
case TokenType.ListEnd:
throw new Exception("Invalid token sequence.");
default:
throw new ArgumentOutOfRangeException();
}
if (enumerator.Current.Type == TokenType.ListValueSeperator)
{
enumerator.MoveNext();
AstNode obj = this.GetAstNode(enumerator);
if (obj is Sequence)
{
var list = new List<AstNode>(((Sequence) obj).Elements);
list.Add(ret);
ret = new Sequence(ret.SourceInfo, list);
}
else
{
ret = new Sequence(ret.SourceInfo, new[] {ret, obj});
}
}
return ret;
}
