private Ast.MethodExpression ParseMethodExpression()
{
if (!ExpectNext(TokenType.LeftParent))
return null;
var methodExp = new Ast.MethodExpression {Span = currentToken.Span};
int expectedArguments = 0;
bool continueParsing = true;
do
{
var token = NextToken();
switch (token.Type)
{
case TokenType.RightParent:
continueParsing = false;
break;
default:
var nextValue = ParseExpression();
if (nextValue == null)
{
continueParsing = false;
}
else
{
methodExp.Arguments.Add(nextValue);
NextToken();
if (currentToken.Type == TokenType.RightParent)
{
continueParsing = false;
}
else if (currentToken.Type == TokenType.Comma)
{
expectedArguments += (expectedArguments == 0) ? 2 : 1;
}
else
{
Logger.Error("Unexpected token [{0}]. Expecting tokens [',', ')']", currentToken.Span, currentToken);
continueParsing = false;
}
}
break;
}
} while (continueParsing);
int argCount = methodExp.Arguments.Count;
if (expectedArguments > 0 && expectedArguments != argCount)
Logger.Error("Unexpected number of commas.", currentToken.Span);
return methodExp;
}
private Ast.MethodExpression ParseMethodExpression()
{
if (!ExpectNext(TokenType.LeftParent))
{
return(null);
}
var methodExp = new Ast.MethodExpression {
Span = currentToken.Span
};
int expectedArguments = 0;
bool continueParsing = true;
do
{
var token = NextToken();
switch (token.Type)
{
case TokenType.RightParent:
continueParsing = false;
break;
default:
var nextValue = ParseExpression();
if (nextValue == null)
{
continueParsing = false;
}
else
{
methodExp.Arguments.Add(nextValue);
NextToken();
if (currentToken.Type == TokenType.RightParent)
{
continueParsing = false;
}
else if (currentToken.Type == TokenType.Comma)
{
expectedArguments += (expectedArguments == 0) ? 2 : 1;
}
else
{
Logger.Error("Unexpected token [{0}]. Expecting tokens [',', ')']", currentToken.Span, currentToken);
continueParsing = false;
}
}
break;
}
} while (continueParsing);
int argCount = methodExp.Arguments.Count;
if (expectedArguments > 0 && expectedArguments != argCount)
{
Logger.Error("Unexpected number of commas.", currentToken.Span);
}
return(methodExp);
}