simple_compiler/else.h at master · nightwolf-chen/simple_compiler · GitHub

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#ifndef __else_h__
#define __else_h__

#include "stmt.h"
#include "type.h"
#include "expr.h"


class Else : public Stmt{
public:
    Expr *expr;
    Stmt *stmt1;
    Stmt *stmt2;

    Else(Expr *x , Stmt *s1 , Stmt *s2){
        expr = x;
        stmt1 = s1;
        stmt2 = s2;
        if(expr->type != Type::Bool())
        {
            expr->error("boolean required in if!");
        }
    }

    void gen(int b , int a)
    {
        int label1 = newlabel();
        int label2 = newlabel();
        expr->jumping(0,label2);
        emitlabel(label1); stmt1->gen(label1,a); emit("goto L" + std::to_string(a));
        emitlabel(label2); stmt2->gen(label2,a);
    }
};

#endif