Node* Parser::UnaryExpr() {
if(oper == KEYWORD_SIZEOF) {
Next();
if(oper == ROUND_LEFT_BRACKET) {
Next();
string type = text;
if(!symStack->TypeAt(text))
throw ParserException(currentToken, "Undefinite type");
Next();
if(oper == ROUND_RIGHT_BRACKET) {
Next();
return new NodeUnary(SIZE_OF, new NodeConst(type, type));
}
else
throw ParserException(currentToken, "Sizeof operation without ')'");
}
else {
Next();
Node *link = UnaryExpr();
if(link == NULL)
throw ParserException(currentToken, "Sizeof operation without argument");
return new NodeUnary(SIZE_OF, link);
}
}
if(oper == OPER_INC || oper == OPER_DEC) {
TokenValue _oper = oper;
Next();
Node *right = UnaryExpr();
if(right == NULL)
throw ParserException(currentToken, "No left operand");
return new NodeUnary(_oper, right);
}
if(unaryOperator[oper]) {
TokenValue _oper = oper;
Next();
Node *right = CastExpr();
if(right == NULL)
throw ParserException(currentToken, "No left operand");
return new NodeUnary(_oper, right);
}
return PostfixExpr();
}
void
nsXFormsXPathParser::MultiplicationExpr()
{
UnaryExpr();
PRBool con = PR_TRUE;
while (con) {
nsXFormsXPathScanner::XPATHTOKEN t = PeekToken();
switch (t) {
case nsXFormsXPathScanner::MULTIPLYOPERATOR:
case nsXFormsXPathScanner::DIV:
case nsXFormsXPathScanner::MOD:
PopToken();
UnaryExpr();
break;
default:
con = PR_FALSE;
}
}
}
void
nsXFormsXPathParser::UnaryExpr()
{
nsXFormsXPathScanner::XPATHTOKEN t = PeekToken();
switch (t) {
case nsXFormsXPathScanner::MINUS:
PopToken();
UnaryExpr();
break;
default:
UnionExpr();
}
}
Node* Parser::CastExpr() {
if(symStack->TypeAt(text) && lastToken->GetTokenValue() == ROUND_LEFT_BRACKET) {
Next();
if(oper == ROUND_RIGHT_BRACKET) {
Next();
Node *right = CastExpr();
if(right == NULL)
throw ParserException(currentToken, "Cast expression without right operand");
return new NodeUnary(CAST_CHAR, right);
}
else
throw ParserException(currentToken, "Cast expression without ')'");
}
return UnaryExpr();
}
