Node* Parser::PostfixExpr() {
Node *left = PrimaryExpr();
if(oper == ROUND_LEFT_BRACKET) {
if( !simple && symStack->FindVar(left->GetName())->GetSymType() != FUNCTION )
throw SemanticException(currentToken, "Term not a function");
Next();
Node *args = ArgumentExprList();
if(oper != ROUND_RIGHT_BRACKET)
throw ParserException(currentToken, "Postfix expression without ')'");
Next();
SymbolType type = ( (SymFunction*)( symStack->FindVar(left->GetName()) ) )->GetReturnType();
return new NodeCall(type, left->GetName(), args);
}
if(oper == SQUARE_LEFT_BRACKET) {
if( !simple && symStack->FindVar(left->GetName())->GetSymType() != ARRAY )
throw SemanticException(currentToken, "Term not an array");
Next();
Node *link = Expression();
if(oper == SQUARE_RIGHT_BRACKET) {
Next();
return new NodeBinary(left, ARRAY_INDEX, link);
}
else throw ParserException(currentToken, "No ']'");
}
if(oper == OPER_POINT || oper == OPER_ARROW) {
TokenValue _oper = oper;
Next();
Node *right = PrimaryExpr();
if(right == NULL)
throw ParserException(currentToken, "No field");
return new NodeBinary(left, _oper, right);
}
if(oper == OPER_INC || oper == OPER_DEC) {
TokenValue _oper = oper;
Next();
return new NodeUnary(_oper, left);
}
return left;
}
void
nsXFormsXPathParser::FilterExpr()
{
PrimaryExpr();
if (PeekToken() == nsXFormsXPathScanner::LBRACK) {
Predicate();
}
}