Question

I am having a difficult time matching up curly brackets in this code. It keeps indicating a “else” without an “if” error but not sure how the syntax should read. If anyone can help it would be most appreciated. Here is the code:

private void compileFactor() {
        boolean its_a_variable = theInfo.isVar();
        if (isIdent(theToken)) {
            String ident = theToken;
            theToken = t.token();       // handles var and const cases!

            IdentInfo theInfo = symTable.lookup(ident);
        }


            boolean its_a_variable = theInfo.isVar();
            int theAddr = theInfo.getAddr(); 
            boolean isGlobal = theInfo.getIsGlobal();
            int constValue = theInfo.getValue();

            if (its_a_variable) {   // pld12: CHANGE THIS!!
                int theAddr = theInfo.getAddr(); 
                boolean isGlobal = theInfo.getIsGlobal();
                if (theAddr == -1) t.error("undeclared identifier used in expr: "+ident);
                if (isGlobal) cs.emit(Machine.LOAD, theAddr);
                else cs.emit(Machine.LOADF, theAddr);
            } else {
                int constValue = theInfo.getValue();
                if (constValue = null) t.error("undeclared identifier used in expr: "+ident);


                else {
                    cs.emitLOADI(theNumber);
                }


            else if (isNumber(theToken)) {
                int theNumber = new Integer(theToken).intValue();
                cs.emitLOADINT(theNumber);
                theToken = t.token();
            }
            else if (equals(theToken, "(")) {  // nothing to do to generate code!
                accept("(");
                compileExpr();
                accept(")");
            }


        }

Answer 1

This else if happens after an else:

        else if (isNumber(theToken)) {
            int theNumber = new Integer(theToken).intValue();
            cs.emitLOADINT(theNumber);
            theToken = t.token();
        }

Edit: fixed and reindented

private void compileFactor() {
    if (isIdent(theToken)) {
        String ident = theToken;
        theToken = t.token();       // handles var and const cases!

        IdentInfo theInfo = symTable.lookup(ident);

        boolean its_a_variable = theInfo.isVar();
        int theAddr = theInfo.getAddr(); 
        boolean isGlobal = theInfo.getIsGlobal();
        int constValue = theInfo.getValue();

        if (its_a_variable) {   // pld12: CHANGE THIS!!
            int theAddr = theInfo.getAddr(); 
            boolean isGlobal = theInfo.getIsGlobal();
            if (theAddr == -1) t.error("undeclared identifier used in expr: "+ident);
            if (isGlobal) cs.emit(Machine.LOAD, theAddr);
            else cs.emit(Machine.LOADF, theAddr);
        } else {
            int constValue = theInfo.getValue();
            if (constValue = null) {
                t.error("undeclared identifier used in expr: "+ident);
            } else {
                cs.emitLOADI(theNumber);
            }
        }
    } else if (isNumber(theToken)) {
        int theNumber = new Integer(theToken).intValue();
        cs.emitLOADINT(theNumber);
        theToken = t.token();
    } else if (equals(theToken, "(")) {  // nothing to do to generate code!
        accept("(");
        compileExpr();
        accept(")");
    }
}