style(sema): 规范符号表代码位置

src/irgen/IRGen.h

@@ -1,4 +1,4 @@
-// 将语法树翻译为极简 IR。
+// 将语法树翻译为 IR。
 // 实现拆分在 IRGenFunc/IRGenStmt/IRGenExp/IRGenDecl。
 
 #pragma once
@@ -11,12 +11,6 @@
 #include "ir/IR.h"
 #include "sem/Sema.h"
 
-namespace antlr4 {
-namespace tree {
-class ParseTree;
-}
-}  // namespace antlr4
-
 namespace ir {
 class Module;
 class Function;

src/irgen/IRGenExp.cpp

@@ -22,7 +22,7 @@ ir::Value* IRGenImpl::GenAddExpr(SysYParser::AddExpContext& add) {
   ir::Value* acc = GenPrimary(*terms[0]);
   for (size_t i = 1; i < terms.size(); ++i) {
     ir::Value* rhs = GenPrimary(*terms[i]);
-    std::string name = ir::DefaultContext().NextTemp();
+    std::string name = module_.context().NextTemp();
     acc = builder_.CreateBinary(ir::Opcode::Add, acc, rhs, name);
   }
   return acc;
@@ -30,7 +30,7 @@ ir::Value* IRGenImpl::GenAddExpr(SysYParser::AddExpContext& add) {
 
 ir::Value* IRGenImpl::GenPrimary(SysYParser::PrimaryContext& primary) {
   if (primary.Number()) {
-    return ir::DefaultContext().GetConstInt(std::stoi(primary.Number()->getText()));
+    return builder_.CreateConstInt(std::stoi(primary.Number()->getText()));
   }
   if (primary.Ident()) {
     auto* decl = sema_.ResolveVarUse(&primary);
@@ -43,7 +43,7 @@ ir::Value* IRGenImpl::GenPrimary(SysYParser::PrimaryContext& primary) {
       throw std::runtime_error("[irgen] 变量声明缺少存储槽位: " +
                                primary.Ident()->getText());
     }
-    return builder_.CreateLoad(it->second, ir::DefaultContext().NextTemp());
+    return builder_.CreateLoad(it->second, module_.context().NextTemp());
   }
   if (primary.exp()) {
     return GenExpr(*primary.exp());

src/irgen/IRGenFunc.cpp

@@ -41,8 +41,7 @@ void IRGenImpl::GenFuncDef(SysYParser::FuncDefContext& func) {
   }
 
   func_ = module_.CreateFunction(
-      func.Ident()->getText(),
-      std::make_shared<ir::Type>(ir::Type::Kind::Int32));
+      func.Ident()->getText(), module_.context().Int32());
   builder_.SetInsertPoint(func_->entry());
   storage_map_.clear();
 

src/sem/Sema.h

@@ -1,4 +1,4 @@
-// 基于语法树的极简语义检查与名称绑定。
+// 基于语法树的语义检查与名称绑定。
 #pragma once
 
 #include <unordered_map>

src/sem/SymbolTable.cpp

@@ -3,3 +3,17 @@
 // - 变量/函数/参数/常量的注册、查找与遮蔽规则
 
 #include "sem/SymbolTable.h"
+
+void SymbolTable::Add(const std::string& name,
+                      SysYParser::VarDeclContext* decl) {
+  table_[name] = decl;
+}
+
+bool SymbolTable::Contains(const std::string& name) const {
+  return table_.find(name) != table_.end();
+}
+
+SysYParser::VarDeclContext* SymbolTable::Lookup(const std::string& name) const {
+  auto it = table_.find(name);
+  return it == table_.end() ? nullptr : it->second;
+}

src/sem/SymbolTable.h

@@ -8,16 +8,9 @@
 
 class SymbolTable {
  public:
-  void Add(const std::string& name, SysYParser::VarDeclContext* decl) {
-    table_[name] = decl;
-  }
-  bool Contains(const std::string& name) const {
-    return table_.find(name) != table_.end();
-  }
-  SysYParser::VarDeclContext* Lookup(const std::string& name) const {
-    auto it = table_.find(name);
-    return it == table_.end() ? nullptr : it->second;
-  }
+  void Add(const std::string& name, SysYParser::VarDeclContext* decl);
+  bool Contains(const std::string& name) const;
+  SysYParser::VarDeclContext* Lookup(const std::string& name) const;
 
  private:
   std::unordered_map<std::string, SysYParser::VarDeclContext*> table_;