BaseExpression* Parser::handleKeyword(string keyword)
{
int type = StringSwitch<int>(StringRef(keyword))
.Case("printf", 0)
.Case("scanf", 1)
.Case("return", 10);
BaseExpression *expr;
LexerToken token;
switch(type) {
case 0:
token = mLexer->getToken();
if(token.value == "(") {
expr = new PrintfInvocation(handleIdentifier(mLexer->getToken()));
}
token = mLexer->getToken();
if(token.value != ";") {
throw "Expected )";
}
break;
default:
break;
}
return expr;
}
void handleArray(string line){
if(contains(line, "<callArray>")){
if (contains(getNextLine(), "<identifier>")) {
string id = getCurrLine();
handleExpression(getNextLine());//looks inside [...]
handleIdentifier(id);//pushes array name on stack
writeArithmetic("+");//offset array
//writePop("pointer", 1); //set point to correct place in memory
// writePush("that", 0); //place array[offset] on stack
while ( !contains(getCurrLine(), "</callArray>")) {
incFilePtr();
}
}else{
error("expected to get array name <identifier> at this point");
}
}else{
error("expected callArray");
}
}
void Parser::parse()
{
LexerToken currentToken;
do {
currentToken = mLexer->getToken();
BaseExpression* expr = 0;
switch (currentToken.type) {
case TYPE:
expr = handleType(currentToken.value);
break;
case IDENTIFIER:
expr = handleIdentifier(currentToken);
break;
case EXPRESSION_END:
break;
case ASSIGNMENT_OP:
// handleAssignment();
break;
case CONST_NUMBER:
break;
case BRACE:
// handleBrace(currentToken.value.c_str()[0]);
break;
case KEYWORD:
expr = handleKeyword(currentToken.value);
break;
default:
break;
}
if(expr) {
mExprList.push_back(expr);
};
} while (currentToken.type != TOKEN_EOF);
}
