【2025-11-16】现有代码上传

PrettyPrinter.h

@@ -0,0 +1,57 @@
+// PrettyPrinter.h
+#ifndef PRETTY_PRINTER_H
+#define PRETTY_PRINTER_H
+
+#include "ast.h"
+#include <ostream>
+#include <functional>
+
+class PrettyPrinter {
+public:
+    explicit PrettyPrinter(std::ostream& os, int indentWidth = 4)
+            : out(os), indentWidth(indentWidth) {}
+
+    void print(ASTNode* root);
+
+private:
+    std::ostream& out;
+    int indentLevel = 0;
+    int indentWidth;
+
+    void indent();
+    void newline();
+    void withIndent(const std::function<void()>& f);
+
+    void printNode(ASTNode* n);
+
+    // 语句 & 翻译单元
+    void printTranslationUnit(ASTNode* n);
+    void printFunctionDef(ASTNode* n);
+    void printDeclStmt(ASTNode* n);
+    void printDeclaration(ASTNode* n);
+    void printIfStmt(ASTNode* n);
+    void printForStmt(ASTNode* n);
+    void printWhileStmt(ASTNode* n);
+    void printReturnStmt(ASTNode* n);
+    void printCompoundStmt(ASTNode* n);
+    void printInitDeclList(ASTNode* n);
+
+    // 表达式
+    void printExpr(ASTNode* n);
+    void printBinary(ASTNode* n, const char* op);
+    void printUnary(ASTNode* n, const char* op, bool prefix=true);
+    void printFuncCall(ASTNode* n);
+    void printArrayRef(ASTNode* n);
+    void printStructRef(ASTNode* n);
+
+
+    // 声明 & 类型
+    void printDeclSpec(ASTNode* n);
+    void printDeclarator(ASTNode* n);
+    void printParamList(ASTNode* n);
+
+    // 辅助
+    bool isStmt(ASTTag tag);
+};
+
+#endif // PRETTY_PRINTER_H