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31 lines
760 B
31 lines
760 B
// 基于语法树的语义检查与名称绑定。
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#pragma once
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#include <unordered_map>
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#include "SysYParser.h"
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class SemanticContext {
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public:
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void BindVarUse(SysYParser::VarContext* use,
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SysYParser::VarDefContext* decl) {
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var_uses_[use] = decl;
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}
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SysYParser::VarDefContext* ResolveVarUse(
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const SysYParser::VarContext* use) const {
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auto it = var_uses_.find(use);
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return it == var_uses_.end() ? nullptr : it->second;
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}
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private:
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std::unordered_map<const SysYParser::VarContext*,
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SysYParser::VarDefContext*>
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var_uses_;
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};
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// 目前仅检查：
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// - 变量先声明后使用
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// - 局部变量不允许重复定义
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SemanticContext RunSema(SysYParser::CompUnitContext& comp_unit);
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