public override Expression DoResolve(ParseContext parseContext)
{
if (ExpressionClass != ExpressionClass.Invalid)
{
return(this);
}
_destinationType = _destinationType.ResolveAsTypeStep(parseContext, false);
Type = _destinationType.Type;
if (Type == null)
{
return(null);
}
var childLambda = _child as LambdaExpression;
if (childLambda != null)
{
childLambda.ImplicitStandardConversionExists(parseContext, Type);
}
_child = _child.Resolve(parseContext);
ExpressionClass = ExpressionClass.Value;
return(this);
}
public override Expression DoResolve(ParseContext parseContext)
{
_operand = _operand.Resolve(parseContext);
_targetType = _targetType.ResolveAsTypeStep(parseContext, false);
Type = _targetType.Type;
return(this);
}
public override Expression DoResolve(ParseContext rc)
{
if (Kind == LiteralKind.Null)
{
return(new DefaultValueExpression(typeof(object)));
}
var literalText = Text;
if (literalText == null)
{
rc.Compiler.Errors.Add(
rc.Compiler.SourceUnit,
"Literal expression cannot have null text value.",
Span,
-1,
Severity.Error);
return(null);
}
_literalType = _literalType.ResolveAsTypeStep(rc, false);
if ((_literalType == null) || (_literalType.Type == null))
{
return(null);
}
if (Kind == LiteralKind.Text)
{
return(new InterpolatedStringExpression(this).Resolve(rc));
}
var builtinType = TypeManager.GetBuiltinTypeFromClrType(_literalType.Type);
if (!builtinType.HasValue)
{
rc.ReportError(
CompilerErrors.LiteralValueMustBeBuiltinType,
Span,
TypeManager.GetCSharpName(_literalType.Type));
return(null);
}
Type type;
if (TypeManager.TryParseLiteral(
builtinType.Value,
literalText,
out _value,
out type))
{
Type = type;
return(ConstantExpression.Create(
Type,
_value,
Span));
}
rc.ReportError(
CompilerErrors.InvalidLiteralValue,
Span,
literalText,
TypeManager.GetCSharpName(_literalType.Type));
return(null);
}