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Praser.cpp
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Praser.cpp
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#include"Praser.h"
#include"block.h"
#include "tools.h"
#include<map>
using namespace std;
Praser::Praser(gramTree* root) {
this->root = root;
praserInit();
}
Praser::~Praser() {
//print_map();
print_code();
}
void Praser::praserInit() {
Block wholeBlock;
blockStack.push_back(wholeBlock);
//事先内置函数print和read
funcNode writeNode;
writeNode.name = "print";
writeNode.rtype = "void";
varNode pnode;
pnode.type = "int";
writeNode.paralist.push_back(pnode);
funcPool.insert({ "print", writeNode });
funcNode readNode;
readNode.name = "read";
readNode.rtype = "int";
funcPool.insert({"read",readNode});
praserGramTree(root); //开始分析语法树
}
void Praser::praserGramTree(struct gramTree* node) {
//cout << "at " << node->name << endl;
if (node == NULL || node->line == -1)
return;
if (node->name == "declaration") {
node = praser_declaration(node);
}
else if (node->name == "function_definition") {
node = praser_function_definition(node);
}
else if (node->name == "statement") {
node = praser_statement(node);
}
//继续向下分析
if (node != NULL) {
praserGramTree(node->left);
praserGramTree(node->right);
}
}
struct gramTree* Praser::praser_statement(struct gramTree* node) {
struct gramTree* next = node->left;
if (node->left->name == "labeled_statement") {
}
if (node->left->name == "compound_statement") {
praser_compound_statement(node->left);
}
if (node->left->name == "expression_statement") {
praser_expression_statement(node->left);
}
if (node->left->name == "selection_statement") {
praser_selection_statement(node->left);
}
if (node->left->name == "iteration_statement") {
praser_iteration_statement(node->left);
}
if (node->left->name == "jump_statement") {
praser_jump_statement(node->left);
}
return node->right;
}
void Praser::praser_jump_statement(struct gramTree* node) {
if (node->left->name == "GOTO") {
}
else if (node->left->name == "CONTINUE") {
}
else if (node->left->name == "BREAK") {
int num = getBreakBlockNumber();
if (num < 0) {
error(node->left->line, "This scope doesn't support break.");
}
innerCode.addCode("GOTO " + blockStack[num].breakLabelname);
}
else if (node->left->name == "RETURN") {
string funcType = getFuncRType();
if (node->left->right->name == "expression") {//return expression
varNode rnode = praser_expression(node->left->right);
innerCode.addCode(innerCode.createCodeforReturn(rnode));
if (rnode.type != funcType) {
error(node->left->right->line, "return type doesn't equal to function return type.");
}
}
else if (node->left->right->name == ";"){//return ;
innerCode.addCode("RETURN");
if (funcType != "void") {
error(node->left->right->line, "You should return " + blockStack.back().func.rtype);
}
}
}
}
void Praser::praser_expression_statement(struct gramTree *node) {
if (node->left->name == "expression") {
praser_expression(node->left);
}
}
varNode Praser::praser_expression(struct gramTree* node) {
if (node->left->name == "expression") {
return praser_expression(node->left);
}
else if (node->left->name == "assignment_expression") {
return praser_assignment_expression(node->left);
}
if (node->right->name == ",") {
return praser_assignment_expression(node->right->right);
}
}
void Praser::praser_compound_statement(struct gramTree* node) {
//继续分析处理compound_statement
praserGramTree(node);
}
//if else
void Praser::praser_selection_statement(struct gramTree* node) {
if (node->left->name == "IF") {
if (node->left->right->right->right->right->right == NULL) {
//添加一个新的block
Block newblock;
blockStack.push_back(newblock);
gramTree* expression = node->left->right->right;
varNode exp_rnode = praser_expression(expression);
gramTree* statement = node->left->right->right->right->right;
string label1 = innerCode.getLabelName();
string label2 = innerCode.getLabelName();
if (exp_rnode.type == "bool") {
innerCode.addCode("IF " + exp_rnode.boolString + " GOTO " + label1);
}
else {
string tempzeroname = "temp" + inttostr(innerCode.tempNum);
++innerCode.tempNum;
varNode newznode = createTempVar(tempzeroname, "int");
innerCode.addCode(tempzeroname + " := #0");
innerCode.addCode("IF " + innerCode.getNodeName(exp_rnode) + " != " + tempzeroname + " GOTO " + label1);
}
innerCode.addCode("GOTO " + label2);
innerCode.addCode("LABEL " + label1 + " :");
praser_statement(statement);
innerCode.addCode("LABEL " + label2 + " :");
//弹出添加的block
blockStack.pop_back();
}
else if (node->left->right->right->right->right->right->name == "ELSE") {
//添加一个新的block
Block newblock1;
blockStack.push_back(newblock1);
gramTree* expression = node->left->right->right;
varNode exp_rnode = praser_expression(expression);
gramTree* statement1 = node->left->right->right->right->right;
gramTree* statement2 = node->left->right->right->right->right->right->right;
string label1 = innerCode.getLabelName();
string label2 = innerCode.getLabelName();
string label3 = innerCode.getLabelName();
if (exp_rnode.type == "bool") {
innerCode.addCode("IF " + exp_rnode.boolString + " GOTO " + label1);
}
else {
string tempzeroname = "temp" + inttostr(innerCode.tempNum);
++innerCode.tempNum;
varNode newznode = createTempVar(tempzeroname, "int");
innerCode.addCode(tempzeroname + " := #0");
innerCode.addCode("IF " + innerCode.getNodeName(exp_rnode) + " != " + tempzeroname + " GOTO " + label1);
}
innerCode.addCode("GOTO " + label2);
innerCode.addCode("LABEL " + label1 + " :");
praser_statement(statement1);
innerCode.addCode("GOTO " + label3);
//弹出添加的block
blockStack.pop_back();
//else
innerCode.addCode("LABEL " + label2 + " :");
Block newblock2;
blockStack.push_back(newblock2);
praser_statement(statement2);
innerCode.addCode("LABEL " + label3 + " :");
//弹出添加的block
blockStack.pop_back();
}
}
else if (node->left->name == "SWITCH") {
}
}
//循环 while for do while
void Praser::praser_iteration_statement(struct gramTree* node) {
if (node->left->name == "WHILE") {
//添加一个新的block
Block newblock;
newblock.canBreak = true;
blockStack.push_back(newblock);
struct gramTree* expression = node->left->right->right;
struct gramTree* statement = node->left->right->right->right->right;
string label1 = innerCode.getLabelName();
string label2 = innerCode.getLabelName();
string label3 = innerCode.getLabelName();
blockStack.back().breakLabelname = label3;
innerCode.addCode("LABEL " + label1 + " :");
varNode var = praser_expression(expression);
if (var.type == "bool") {
innerCode.addCode("IF " + var.boolString + " GOTO " + label2);
}
else {
string tempzeroname = "temp" + inttostr(innerCode.tempNum);
++innerCode.tempNum;
varNode newznode = createTempVar(tempzeroname, "int");
innerCode.addCode(tempzeroname + " := #0");
innerCode.addCode("IF " + innerCode.getNodeName(var) + " != " + tempzeroname + " GOTO " + label2);
}
innerCode.addCode("GOTO " + label3);
innerCode.addCode("LABEL " + label2 + " :");
praser_statement(statement);
innerCode.addCode("GOTO " + label1);
innerCode.addCode("LABEL " + label3 + " :");
//弹出添加的block
blockStack.pop_back();
}
else if (node->left->name == "DO") {
//添加一个新的block
Block newblock;
newblock.canBreak = true;
blockStack.push_back(newblock);
struct gramTree* statement = node->left->right;
struct gramTree* expression = node->left->right->right->right->right;
string label1 = innerCode.getLabelName();
string label2 = innerCode.getLabelName();
blockStack.back().breakLabelname = label2;
innerCode.addCode("LABEL " + label1 + " :");
praser_statement(statement);
varNode var = praser_expression(expression);
if (var.type == "bool") {
innerCode.addCode("IF " + var.boolString + " GOTO " + label1);
}
else {
string tempzeroname = "temp" + inttostr(innerCode.tempNum);
++innerCode.tempNum;
varNode newznode = createTempVar(tempzeroname, "int");
innerCode.addCode(tempzeroname + " := #0");
innerCode.addCode("IF " + innerCode.getNodeName(var) + " != " + tempzeroname + " GOTO " + label1);
}
/*innerCode.addCode("GOTO " + label1);*/
innerCode.addCode("LABEL " + label2 + " :");
//弹出添加的block
blockStack.pop_back();
}
else if (node->left->name == "FOR") {
if (node->left->right->right->name == "expression_statement") {
//FOR '(' expression_statement expression_statement ')'statement
if (node->left->right->right->right->right->name == ")") {
//添加一个新的block
Block newblock;
newblock.canBreak = true;
blockStack.push_back(newblock);
gramTree* exp_state1 = node->left->right->right;
gramTree* exp_state2 = exp_state1->right;
gramTree* statement = exp_state2->right->right;
string label1 = innerCode.getLabelName();
string label2 = innerCode.getLabelName();
string label3 = innerCode.getLabelName();
blockStack.back().breakLabelname = label3;
if (exp_state1->left->name == "expression") {
praser_expression(exp_state1->left);
}
innerCode.addCode("LABEL " + label1 + " :");
varNode var;
if (exp_state2->left->name == "expression") {
var = praser_expression(exp_state2->left);
if (var.type == "bool") {
innerCode.addCode("IF " + var.boolString + " GOTO " + label2);
}
else {
string tempzeroname = "temp" + inttostr(innerCode.tempNum);
++innerCode.tempNum;
varNode newznode = createTempVar(tempzeroname, "int");
innerCode.addCode(tempzeroname + " := #0");
innerCode.addCode("IF " + innerCode.getNodeName(var) + " != " + tempzeroname + " GOTO " + label2);
}
}
else {
innerCode.addCode("GOTO " + label2);
}
innerCode.addCode("GOTO " + label3);
innerCode.addCode("LABEL " + label2 + " :");
praser_statement(statement);
innerCode.addCode("GOTO " + label1);
innerCode.addCode("LABEL " + label3 + " :");
////如果需要break
//if (blockStack.back().breakLabelNum > 0) {
// innerCode.addCode("LABEL label" + inttostr(blockStack.back().breakLabelNum) + " :");
//}
//弹出添加的block
blockStack.pop_back();
}
//FOR ( expression_statement expression_statement expression ) statement
else if (node->left->right->right->right->right->name == "expression") {
//添加一个新的block
Block newblock;
newblock.canBreak = true;
blockStack.push_back(newblock);
gramTree* exp_state1 = node->left->right->right;
gramTree* exp_state2 = exp_state1->right;
gramTree* exp = exp_state2->right;
gramTree* statement = exp->right->right;
string label1 = innerCode.getLabelName();
string label2 = innerCode.getLabelName();
string label3 = innerCode.getLabelName();
blockStack.back().breakLabelname = label3;
if (exp_state1->left->name == "expression") {
praser_expression(exp_state1->left);
}
innerCode.addCode("LABEL " + label1 + " :");
varNode var;
if (exp_state2->left->name == "expression") {
var = praser_expression(exp_state2->left);
if (var.type == "bool") {
innerCode.addCode("IF " + var.boolString + " GOTO " + label2);
}
else {
string tempzeroname = "temp" + inttostr(innerCode.tempNum);
++innerCode.tempNum;
varNode newznode = createTempVar(tempzeroname, "int");
innerCode.addCode(tempzeroname + " := #0");
innerCode.addCode("IF " + innerCode.getNodeName(var) + " != " + tempzeroname + " GOTO " + label2);
}
}
else {
innerCode.addCode("GOTO " + label2);
}
innerCode.addCode("GOTO " + label3);
innerCode.addCode("LABEL " + label2 + " :");
praser_statement(statement);
praser_expression(exp);
innerCode.addCode("GOTO " + label1);
innerCode.addCode("LABEL " + label3 + " :");
////如果需要break
//if (blockStack.back().breakLabelNum > 0) {
// innerCode.addCode("LABEL label" + inttostr(blockStack.back().breakLabelNum) + " :");
//}
//弹出添加的block
blockStack.pop_back();
}
}
if (node->left->right->right->name == "declaration") {
//FOR '(' declaration expression_statement ')' statement
if (node->left->right->right->right->right->name == ")") {
//添加一个新的block
Block newblock;
newblock.canBreak = true;
blockStack.push_back(newblock);
gramTree *declaration = node->left->right->right;
gramTree *expression_statement = declaration->right;
gramTree *statement = expression_statement->right->right;
string label1 = innerCode.getLabelName();
string label2 = innerCode.getLabelName();
string label3 = innerCode.getLabelName();
blockStack.back().breakLabelname = label3;
praser_declaration(declaration);
innerCode.addCode("LABEL " + label1 + " :");
varNode var;
if (expression_statement->left->name == "expression") {
var = praser_expression(expression_statement->left);
if (var.type == "bool") {
innerCode.addCode("IF " + var.boolString + " GOTO " + label2);
}
else {
string tempzeroname = "temp" + inttostr(innerCode.tempNum);
++innerCode.tempNum;
varNode newznode = createTempVar(tempzeroname, "int");
innerCode.addCode(tempzeroname + " := #0");
innerCode.addCode("IF " + innerCode.getNodeName(var) + " != " + tempzeroname + " GOTO " + label2);
}
}
else {
innerCode.addCode("GOTO " + label2);
}
innerCode.addCode("GOTO " + label3);
innerCode.addCode("LABEL " + label2 + " :");
praser_statement(statement);
//cout << "here" << endl;
innerCode.addCode("GOTO " + label1);
innerCode.addCode("LABEL " + label3 + " :");
////如果需要break
//if (blockStack.back().breakLabelNum > 0) {
// innerCode.addCode("LABEL label" + inttostr(blockStack.back().breakLabelNum) + " :");
//}
//弹出添加的block
blockStack.pop_back();
}
//FOR ( declaration expression_statement expression ) statement
else if (node->left->right->right->right->right->name == "expression") {
//添加一个新的block
Block newblock;
newblock.canBreak = true;
blockStack.push_back(newblock);
gramTree *declaration = node->left->right->right;
gramTree *expression_statement = declaration->right;
gramTree *expression = expression_statement->right;
gramTree *statement = expression->right->right;
string label1 = innerCode.getLabelName();
string label2 = innerCode.getLabelName();
string label3 = innerCode.getLabelName();
blockStack.back().breakLabelname = label3;
praser_declaration(declaration);
innerCode.addCode("LABEL " + label1 + " :");
varNode var;
if (expression_statement->left->name == "expression") {
var = praser_expression(expression_statement->left);
if (var.type == "bool") {
innerCode.addCode("IF " + var.boolString + " GOTO " + label2);
}
else {
string tempzeroname = "temp" + inttostr(innerCode.tempNum);
++innerCode.tempNum;
varNode newznode = createTempVar(tempzeroname, "int");
innerCode.addCode(tempzeroname + " := #0");
innerCode.addCode("IF " + innerCode.getNodeName(var) + " != " + tempzeroname + " GOTO " + label2);
}
}
else {
innerCode.addCode("GOTO " + label2);
}
innerCode.addCode("GOTO " + label3);
innerCode.addCode("LABEL " + label2 + " :");
praser_statement(statement);
praser_expression(expression);
//cout << "here" << endl;
innerCode.addCode("GOTO " + label1);
innerCode.addCode("LABEL " + label3 + " :");
////如果需要break
//if (blockStack.back().breakLabelNum > 0) {
// innerCode.addCode("LABEL label" + inttostr(blockStack.back().breakLabelNum) + " :");
//}
//弹出添加的block
blockStack.pop_back();
}
}
}
}
//函数定义
struct gramTree* Praser::praser_function_definition(struct gramTree* node) {
gramTree* type_specifier = node->left;
gramTree* declarator = node->left->right;
gramTree* compound_statement = declarator->right;
string funcType = type_specifier->left->content;
string funcName = declarator->left->left->content;
/*if (build_in_function.find(funcName) != build_in_function.end()) {
error(declarator->left->left->line, "Function name can't be bulid in function.");
}*/
bool isdeclared = false;
funcNode declarFunc;
if (funcPool.find(funcName) != funcPool.end()) {
//函数重复定义
if (funcPool[funcName].isdefinied) {
error(declarator->left->left->line, "Function " + funcName + " is duplicated definition.");
}
//函数事先声明过但是没有定义
else {
isdeclared = true;
//先删除掉函数池中的函数的声明
declarFunc = funcPool[funcName];
funcPool.erase(funcPool.find(funcName));
}
}
//进入新的block
Block funBlock;
funBlock.isfunc = true;
funBlock.func.name = funcName;
funBlock.func.rtype = funcType;
funBlock.func.isdefinied = true;
//将函数记录在块内并添加到函数池
blockStack.push_back(funBlock);
funcPool.insert({funcName,funBlock.func});
innerCode.addCode("FUNCTION " + funcName + " :");
//获取函数形参列表
if(declarator->left->right->right->name == "parameter_list")
praser_parameter_list(declarator->left->right->right, funcName,true);
//此时函数池中的func已经添加了参数列表
funcNode func = funcPool[funcName];
//如果函数事先声明过，则比较函数的参数列表和返回类型
if (isdeclared) {
if (func.rtype != declarFunc.rtype) {
error(type_specifier->left->line, "Function return type doesn't equal to the function declared before.");
}
cout << funBlock.func.paralist.size() << endl;
if (func.paralist.size() != declarFunc.paralist.size()) {
error(declarator->left->right->right->line, "The number of function parameters doesn't equal to the function declared before.");
}
for (int i = 0; i < funBlock.func.paralist.size(); i++) {
if (func.paralist[i].type != declarFunc.paralist[i].type)
error(declarator->left->right->right->line, "The parameter " + funBlock.func.paralist[i].name + "'s type doesn't equal to the function declared before." );
}
}
//更新Block中func的参数列表
funBlock.func = func;
//分析函数的正文
praser_compound_statement(compound_statement);
//函数结束后，弹出相应的block
blockStack.pop_back();
return node->right;
}
//获取函数形参列表，函数定义需要获取形参，声明则不需要
void Praser::praser_parameter_list(struct gramTree* node,string funcName,bool definite) {
if (node->left->name == "parameter_list") {
praser_parameter_list(node->left, funcName,definite);
}
else if (node->left->name == "parameter_declaration") {
praser_parameter_declaration(node->left,funcName,definite);
}
if (node->right->name == ",") {
praser_parameter_declaration(node->right->right, funcName,definite);
}
}
//获取单个形参内容,函数定义需要获取形参，声明则不需要
void Praser::praser_parameter_declaration(struct gramTree* node, string funcName,bool definite) {
//cout << "praser_parameter_declaration" << endl;
gramTree* type_specifier = node->left;
gramTree* declarator = node->left->right;
string typeName = type_specifier->left->content;
if (typeName == "void") {
error(type_specifier->line, "Void can't definite parameter.");
}
//================================================
//暂时只考虑变量，不考虑数组作为形参
string varName = declarator->left->content;
varNode newnode;
newnode.name = varName;
newnode.type = typeName;
if (definite) {
newnode.num = innerCode.varNum++;
blockStack.back().func.paralist.push_back(newnode);
}
funcPool[funcName].paralist.push_back(newnode);
//将函数的形参添加到当前块的变量池中
blockStack.back().varMap.insert({varName,newnode});
if(definite)
innerCode.addCode(innerCode.createCodeforParameter(newnode));
}
struct gramTree* Praser::praser_declaration(struct gramTree *node) {
//cout << "at " << node->name << endl;
//node = declaration
struct gramTree* begin = node->left; //begin:type_specifier
if (begin->right->name == ";")
return node->right;
string vartype = begin->left->content;
if (vartype == "void") {
error(begin->left->line,"void type can't assign to variable"); //报错
}
struct gramTree* decl = begin->right; //init_declarator_list
/*while (decl->right) {
praser_init_declarator(vartype, decl->right->right);
decl = decl->left;
}
praser_init_declarator(vartype, decl);*/
praser_init_declarator_list(vartype, decl);
return node->right;
}
void Praser::praser_init_declarator_list(string vartype, struct gramTree* node) {
if (node->left->name == "init_declarator_list") {
praser_init_declarator_list(vartype, node->left);
}
else if (node->left->name == "init_declarator") {
praser_init_declarator(vartype, node->left);
}
if (node->right->name == ",") {
praser_init_declarator(vartype, node->right->right);
}
}
//分析变量初始化
void Praser::praser_init_declarator(string vartype, struct gramTree* node) {
//cout << "at " << node->name << endl;
struct gramTree* declarator = node->left;
if (!declarator->right) {
//获取变量的名字
if (declarator->left->name == "IDENTIFIER") {
struct gramTree* id = declarator->left;
string var = id->content;
if (!lookupCurruntVar(var)) {
varNode newvar;
newvar.name = var;
newvar.type = vartype;
newvar.num = innerCode.varNum++;
blockStack.back().varMap.insert({ var,newvar });
}
else error(declarator->left->line, "Variable multiple declaration.");
}
else {
//函数声明
if (declarator->left->right->name == "(") {
string funcName = declarator->left->left->content;
string funcType = vartype;
if (blockStack.size() > 1) {
error(declarator->left->right->line, "Functinon declaration must at global environment.");
}
gramTree* parameter_list = declarator->left->right->right;
funcNode newFunc;
newFunc.isdefinied = false;
newFunc.name = funcName;
newFunc.rtype = funcType;
funcPool.insert({ funcName,newFunc });
//分析函数形参列表
praser_parameter_list(parameter_list,funcName,false);
}
//数组声明
else if (declarator->left->right->name == "[") {
string arrayName = declarator->left->left->content;
string arrayType = vartype;
gramTree* assign_exp = declarator->left->right->right;
varNode rnode = praser_assignment_expression(assign_exp);
if (rnode.type != "int") {
error(declarator->left->right->line,"Array size must be int.");
}
varNode tnode;
if (arrayType == "int") {
//创建一个新的临时变量来储存数组的大小
string tempname = "temp" + inttostr(innerCode.tempNum);
++innerCode.tempNum;
tnode = createTempVar(tempname, "int");
blockStack.back().varMap.insert({ tempname,tnode });
varNode tempVar3;
string tempName3 = "temp" + inttostr(innerCode.tempNum);
++innerCode.tempNum;
tempVar3.name = tempName3;
tempVar3.type = "int";
blockStack.back().varMap.insert({ tempName3,tempVar3 });
innerCode.addCode(tempName3 + " := #4");
innerCode.addCode(tnode.name + " := " + tempName3 +" * " + rnode.name);
}
else if (arrayType == "double") {
//创建一个新的临时变量来储存数组的大小
string tempname = "temp" + inttostr(innerCode.tempNum);
++innerCode.tempNum;
tnode = createTempVar(tempname, "int");
blockStack.back().varMap.insert({ tempname,tnode });
varNode tempVar3;
string tempName3 = "temp" + inttostr(innerCode.tempNum);
++innerCode.tempNum;
tempVar3.name = tempName3;
tempVar3.type = "int";
blockStack.back().varMap.insert({ tempName3,tempVar3 });
innerCode.addCode(tempName3 + " := #8");
innerCode.addCode(tnode.name + " := " + tempName3 + " * " + rnode.name);
}
else if (arrayType == "bool") {
tnode = rnode;
}
arrayNode anode;
anode.name = arrayName;
anode.type = arrayType;
anode.num = innerCode.arrayNum++;
innerCode.addCode("DEC " + innerCode.getarrayNodeName(anode) + " " + tnode.name);
blockStack.back().arrayMap.insert({ arrayName,anode });
}
}
}
//有初始化
else if (declarator->right->name == "=") {
//获取变量的名字
varNode newvar;
if (declarator->left->name == "IDENTIFIER") {
struct gramTree* id = declarator->left;
string var = id->content;
if (!lookupCurruntVar(var)) {
newvar.name = var;
newvar.type = vartype;
newvar.num = innerCode.varNum++;
blockStack.back().varMap.insert({ var,newvar });
}
else error(declarator->left->line, "Variable multiple declaration.");
}
else error(declarator->left->line, "It's not a variable!");
gramTree* initializer = declarator->right->right;
if (initializer == NULL) {
error(declarator->line, "Lack the initializer for variable.");
}
else {
if (initializer->left->name == "assignment_expression") {
varNode rnode = praser_assignment_expression(initializer->left);
innerCode.addCode(innerCode.createCodeforAssign(newvar,rnode));
string rtype = rnode.type;
if (rtype != vartype)
error(initializer->left->line, "Wrong type to variable " + declarator->left->content + ": " +
rtype + " to " + vartype);
}
}
}
else error(declarator->right->line, "Wrong value to variable");
}
varNode Praser::praser_assignment_expression(struct gramTree* assign_exp) { //返回变量节点
//cout << "praser_assignment_expression" << endl;
if (assign_exp->left->name == "logical_or_expression") {
struct gramTree* logical_or_exp = assign_exp->left;
return praser_logical_or_expression(logical_or_exp);
}
//赋值运算
else if(assign_exp->left->name == "unary_expression"){
struct gramTree* unary_exp = assign_exp->left;
string op = assign_exp->left->right->left->name;
struct gramTree* next_assign_exp = assign_exp->left->right->right;
varNode node1 = praser_unary_expression(unary_exp);
varNode node2 = praser_assignment_expression(next_assign_exp);
varNode node3;
if (op == "=") {
node3 = node2;
}
else {
string tempname = "temp" + inttostr(innerCode.tempNum);
++innerCode.tempNum;
node3 = createTempVar(tempname, node1.type);
blockStack.back().varMap.insert({ tempname,node3 });
if (op == "MUL_ASSIGN") { //*=
if (node1.type != node2.type) {
error(assign_exp->left->line, "Different type for two variables.");
}
innerCode.addCode(innerCode.createCodeforVar(tempname, "*", node1, node2));
}
else if (op == "DIV_ASSIGN") { //*=
if (node1.type != node2.type) {
error(assign_exp->left->line, "Different type for two variables.");
}
innerCode.addCode(innerCode.createCodeforVar(tempname, "/", node1, node2));
}
else if (op == "MOD_ASSIGN") { //*=
if (node1.type != "int" || node2.type != "int") {
error(assign_exp->left->line, "The two variables must be int.");
}
innerCode.addCode(innerCode.createCodeforVar(tempname, "%", node1, node2));
}
else if (op == "ADD_ASSIGN") { //*=
if (node1.type != node2.type) {
error(assign_exp->left->line, "Different type for two variables.");
}
innerCode.addCode(innerCode.createCodeforVar(tempname, "+", node1, node2));
}
else if (op == "SUB_ASSIGN") { //*=
if (node1.type != node2.type) {
error(assign_exp->left->line, "Different type for two variables.");
}
innerCode.addCode(innerCode.createCodeforVar(tempname, "-", node1, node2));
}
else if (op == "LEFT_ASSIGN") { //*=
if (node1.type != "int" || node2.type != "int") {
error(assign_exp->left->line, "The two variables must be int.");
}
innerCode.addCode(innerCode.createCodeforVar(tempname, "<<", node1, node2));
}
else if (op == "RIGHT_ASSIGN") { //*=
if (node1.type != "int" || node2.type != "int") {
error(assign_exp->left->line, "The two variables must be int.");
}
innerCode.addCode(innerCode.createCodeforVar(tempname, ">>", node1, node2));
}
else if (op == "AND_ASSIGN") { //*=
if (node1.type != "int" || node2.type != "int") {
error(assign_exp->left->line, "The two variables must be int.");
}
innerCode.addCode(innerCode.createCodeforVar(tempname, "&", node1, node2));
}
else if (op == "XOR_ASSIGN") { //*=
if (node1.type != "int" || node2.type != "int") {
error(assign_exp->left->line, "The two variables must be int.");
}
innerCode.addCode(innerCode.createCodeforVar(tempname, "^", node1, node2));
}
else if (op == "OR_ASSIGN") { //*=
if (node1.type != "int" || node2.type != "int") {
error(assign_exp->left->line, "The two variables must be int.");
}
innerCode.addCode(innerCode.createCodeforVar(tempname, "|", node1, node2));
}
}
innerCode.addCode(innerCode.createCodeforAssign(node1, node3));
return node1;
}
}
varNode Praser::praser_logical_or_expression(struct gramTree* logical_or_exp) {
if(logical_or_exp->left->name == "logical_and_expression"){
struct gramTree* logical_and_exp = logical_or_exp->left;
return praser_logical_and_expression(logical_and_exp);
}
else if (logical_or_exp->left->name == "logical_or_expression") {
//logical_or_expression -> logical_or_expression OR_OP logical_and_expression
varNode node1 = praser_logical_or_expression(logical_or_exp->left);
varNode node2 = praser_logical_and_expression(logical_or_exp->left->right->right);
if (node1.type != "bool" || node2.type != "bool") {
error(logical_or_exp->left->right->line, "Logical Or operation should only used to bool. ");
}
string tempname = "temp" + inttostr(innerCode.tempNum);
++innerCode.tempNum;
varNode newnode = createTempVar(tempname, node1.type);
blockStack.back().varMap.insert({ tempname,newnode });
innerCode.addCode(innerCode.createCodeforVar(tempname, "||", node1, node2));
newnode.boolString = innerCode.getNodeName(node1) + " || " + innerCode.getNodeName(node2);
return newnode;
}
}
varNode Praser::praser_logical_and_expression(struct gramTree* logical_and_exp) {
if (logical_and_exp->left->name == "inclusive_or_expression") {
gramTree* inclusive_or_exp = logical_and_exp->left;
return praser_inclusive_or_expression(inclusive_or_exp);
}
else if (logical_and_exp->left->name == "logical_and_expression") {
varNode node1 = praser_logical_and_expression(logical_and_exp->left);
varNode node2 = praser_inclusive_or_expression(logical_and_exp->left->right->right);
if (node1.type != "bool" || node2.type != "bool") {
error(logical_and_exp->left->right->line, "Logical And operation should only used to bool. ");
}
string tempname = "temp" + inttostr(innerCode.tempNum);
++innerCode.tempNum;
varNode newnode = createTempVar(tempname, node1.type);
blockStack.back().varMap.insert({ tempname,newnode });
innerCode.addCode(innerCode.createCodeforVar(tempname, "&&", node1, node2));