build a parser for c--

node.h

@@ -0,0 +1,74 @@
+#pragma once
+#include <stdint.h>
+
+typedef enum node_kind_t {
+  Semi,
+  Comma,
+  Assignop,
+  Plus,
+  Minus,
+  Times,
+  Div,
+  And,
+  Or,
+  Dot,
+  Not,
+  Lp,
+  Rp,
+  Lb,
+  Rb,
+  Lc,
+  Rc,
+  Struct,
+  Return,
+  If,
+  Else,
+  While,
+  Type_int,
+  Type_float,
+  Integer,
+  Float,
+  Ident,
+  Line_comment,
+  Block_comment,
+  Program,
+  ExtDefList,
+  ExtDef,
+  ExtDecList,
+  Specifier,
+  StructSpecifier,
+  OptTag,
+  Tag,
+  VarDec,
+  FunDec,
+  VarList,
+  ParamDec,
+  CompSt,
+  StmtList,
+  Stmt,
+  DefList,
+  Def,
+  DecList,
+  Dec,
+  Exp,
+  Args
+} NodeType;
+typedef union value {
+  double real;
+  intptr_t integer;
+  char const *id;
+  void *null;
+} ValueUnion;
+typedef struct node {
+  NodeType type;
+  intptr_t line;
+  intptr_t size;
+  struct node **children;
+  union value value;
+} Node;
+
+typedef Node *pNode;
+
+pNode newNode(NodeType, intptr_t, intptr_t, Node **, ValueUnion);
+ValueUnion nullValue();
+void DFS(pNode, int);