codegen.cpp

#include "codegen.h"
#include <iostream>
#include <cctype>

using namespace std;

void CodeGenerator::generate(Node* root) {
    generateExpr(root->right);
    cout << "STORE " << root->left->value << endl;
}

void CodeGenerator::generateExpr(Node* node) {
    if (!node) return;

    if (node->value == "+" || node->value == "-" ||
        node->value == "*" || node->value == "/") {

        generateExpr(node->left);
        generateExpr(node->right);

        if (node->value == "+") cout << "ADD\n";
        if (node->value == "-") cout << "SUB\n";
        if (node->value == "*") cout << "MUL\n";
        if (node->value == "/") cout << "DIV\n";
    }
    else {
        // 🔥 differentiate variable vs number
        if (isdigit(node->value[0]))
            cout << "PUSH " << node->value << endl;
        else
            cout << "LOAD " << node->value << endl;
    }
}