void CompilationEng::compileDo()
{
printNonterminal("doStatement");
numOfTab++;
printCurrentToken(false); //<keyword> do </keyword>
compileSubroutineCall();
printCurrentToken(); //<symbol> ; </symbol>
numOfTab--;
printNonterminal("doStatement",false);
}
void CompilationEngine::compileDo()
{
/* 'do' subroutineCall ';' */
tagNonTerminal("doStatement");
readKeyword("do", Keyword::kDO);
nextToken();
compileSubroutineCall();
readSymbol(';');
untagNonTerminal("doStatement");
nextToken();
}
void CompilationEngine::compileTerm() // 362
{
// integerConst | stringConst | keywordConst |
// varName | varName '[' expression ']' | subroutineCall |
// '(' expression ')' | unaryOp term
tagNonTerminal("term");
string id;
string oldTok;
switch(jt.tokenType()) {
case TokenType::kINT_CONST:
readIntConst();
break;
case TokenType::kSTRING_CONST:
readStringConst();
break;
case TokenType::kKEYWORD:
readKeywordConstant();
break;
case TokenType::kIDENTIFIER:
id = jt.getToken(); // save current token
nextToken();
if (jt.tokenType() == TokenType::kSYMBOL && jt.symbol() == '[') {
oldTok = jt.getToken();
jt.setToken(id);
readIdentifier();
jt.setToken(oldTok);
readSymbol('[');
nextToken();
compileExpression();
readSymbol(']');
nextToken();
} else if (jt.tokenType() == TokenType::kSYMBOL && (jt.symbol() == '.' || jt.symbol() == '(')) {
compileSubroutineCall(id);
} else {
oldTok = jt.getToken();
jt.setToken(id);
readIdentifier();
jt.setToken(oldTok);
}
untagNonTerminal("term");
return; // has already advanced
break;
case TokenType::kSYMBOL:
if (jt.symbol() == '(') { // '(' expression ')'
readSymbol('(');
nextToken();
compileExpression();
readSymbol(')');
} else { // unaryOp term
readUnaryOp();
nextToken();
compileTerm();
untagNonTerminal("term");
return; // has already advanced
}
break;
default:
break;
}
nextToken();
untagNonTerminal("term");
}
