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// 极简符号表:记录局部变量是否定义。
#pragma once
#include <string>
#include <unordered_map>
class SymbolTable {
public:
void Add(const std::string& name) { table_[name] = true; }
bool Contains(const std::string& name) const {
return table_.find(name) != table_.end();
}
private:
std::unordered_map<std::string, bool> table_;
};