initial commit

projects/task3/ast.h

@@ -0,0 +1,120 @@
+typedef enum {false, true} bool;
+
+enum const_type
+{
+    Num = 0,
+    // oper
+    Add,
+    Mul,
+    // pred
+    Eq,
+    Le,
+    // connect
+    And,
+    Or,
+    Impl
+};
+typedef enum const_type const_type;
+
+enum quant_type
+{
+    Forall,
+    Exists
+};
+typedef enum quant_type quant_type;
+
+enum term_type
+{
+    Var,
+    Const,
+    Apply,
+    Quant
+};
+typedef enum term_type term_type;
+
+struct term
+{
+    term_type type;
+    union {
+        char *Var;
+        struct
+        {
+            const_type type;
+            int content;
+        } Const;
+        struct
+        {
+            struct term *left;
+            struct term *right;
+        } Apply;
+        struct
+        {
+            quant_type type;
+            char *var;
+            struct term *body;
+        } Quant;
+    } content;
+};
+typedef struct term term;
+
+struct term_list
+{
+    term *element;
+    struct term_list *next;
+};
+typedef struct term_list term_list;
+
+typedef struct var_sub
+{
+    char *var;
+    term *sub_term;
+} var_sub;
+
+typedef struct var_sub_list
+{
+    var_sub *cur;
+    struct var_sub_list *next;
+} var_sub_list;
+
+typedef enum {bool_res, termlist} res_type;
+typedef struct{
+    res_type type;
+    union{
+        bool ans;
+        term_list* list;
+    } d;
+} solve_res;
+
+typedef struct{
+    term *assum;
+    term *concl;
+} ImplyProp;
+
+/* BEGIN Given Functions */
+
+// malloc 函数，内存均初始为全0
+term_list *malloc_term_list();
+solve_res *malloc_solve_res();
+
+// 构造函数
+ImplyProp *createImplyProp(term *t1, term *t2);
+
+// 深拷贝函数
+term *copy_term(term *t);
+term_list *copy_term_list(term_list *list);
+
+// free 函数
+void free_str(char *s);
+void free_imply_prop(ImplyProp *p);
+void free_term(term *t);
+void free_term_list(term_list *list);
+
+// string 相关函数
+char *strdup(const char *s);
+int strcmp(const char *s1, const char *s2);
+
+/* END Given Functions */
+
+term *subst_var(char *den, char *src, term *t);
+term* subst_term(term* den, char* src, term* t);
+bool alpha_equiv(term *t1, term *t2);