public static ExpressionNode Parse(ContextNode context, IAbstractSyntaxTree lexerNode, TypeReference expectedType = null)
{
Contract.Ensures(Contract.Result <ExpressionNode>() != null);
ExpressionNode ret = null;
switch (lexerNode.Type)
{
case Lexer.TokenType.FullSymbol:
case Lexer.TokenType.Symbol:
ret = DotOperatorNode.Parse(context, lexerNode);
break;
case Lexer.TokenType.LiteralNode:
ret = LiteralNode.Parse(context, lexerNode);
break;
case Lexer.TokenType.Value:
ret = ExpressionNode.Parse(context, lexerNode.Children[0], expectedType);
break;
case Lexer.TokenType.Function:
ret = MethodNode.Parse(context, lexerNode);
break;
case Lexer.TokenType.InfixNode:
ret = InfixParser.Parse(context, lexerNode);
break;
case Lexer.TokenType.PostfixNode:
case Lexer.TokenType.PrefixNode:
ret = UnaryOperators.Parse(context, lexerNode);
break;
case Lexer.TokenType.ParenthesesNode:
ret = ExpressionNode.Parse(context, lexerNode.Children[1], expectedType);
break;
case Lexer.TokenType.ArrayLiteral:
ret = ArrayCreationNode.Parse(context, lexerNode);
break;
case Lexer.TokenType.Null:
ret = NullNode.Parse(context, lexerNode);
break;
default:
ContractsHelper.AssumeUnreachable("Unknown expression type {0}", lexerNode.Type);
break;
}
if (!(expectedType == null || expectedType.IsAuto()))
{
var ambiguous = ret as IAmbiguousNode;
if (ambiguous != null)
{
ret = ambiguous.RemoveAmbiguity(context, expectedType);
}
}
return(ret);
}
public static NullNode Parse(ContextNode context, IAbstractSyntaxTree lexerNode)
{
Contract.Requires(lexerNode.Type == Lexer.TokenType.Null);
return(NullNode.Create(context.Parser.GetSequencePoint(lexerNode)));
}