private bool functionCall()
{
int line = _line;
int position = _position;
if (!accept("("))
{
return(false);
}
List <Node> parameterList;
if (accept(")"))
{
parameterList = new List <Node>();
}
else
{
parameterList = expressionList();
expect(")");
}
FunctionCallNode node = new FunctionCallNode(null, parameterList, SymbolTable.CurrentScope, _filename, line, position);
_stack.Push(node);
return(true);
}
private void component()
{
/// component = prefixOperator? ( number | identifier | '"' [^"] '"' | '(' expression ')' ) postFixOperator?
PrefixOperatorNode prefix = null;
if (prefixOperator())
{
prefix = (PrefixOperatorNode)_stack.Pop();
}
if (number() || characterString())
{
if (prefix != null)
{
prefix.Target = _stack.Pop();
_stack.Push(prefix);
}
return;
}
else if (identifier())
{
if (functionCall())
{
FunctionCallNode node = (FunctionCallNode)_stack.Pop();
IdentifierNode identifierNode = (IdentifierNode)_stack.Pop();
node.Identifier = identifierNode.Identifier;
_stack.Push(node);
}
if (prefix != null)
{
prefix.Target = _stack.Pop();
_stack.Push(prefix);
}
return;
}
expect("(");
expression();
expect(")");
}
