AST construction for expressions

1 files changed, 33 insertions, 4 deletions

diff --git a/ast.h b/ast.h
index f6db7da..d438b92 100644
--- a/ast.h
+++ b/ast.h
@@ -1,7 +1,17 @@
-typedef struct {
+#ifndef AST_H
+#define AST_H
+
+#define EXP_POSTFIX     1024
+#define POSTFIX_ARR     1025
+#define POSTFIX_CALL    1026
+#define POSTFIX_DOT     1027
+#define POSTFIX_PTR     1028
+#define EXP_CAST        1029
+
+typedef struct CNode {
     enum {
         /* Top Level */
-        PROG = 1024,  FUNC_DEF, PARAMS, 
+        PROG,  FUNC_DEF, PARAMS, 
         DECL, /* declaration */
         DECLR, /* declarator */
         DECLRS, 
@@ -18,11 +28,17 @@ typedef struct {
         CONT_STMT , BREAK_STMT, RET_STMT, /* 'continue', 'break', 'return' */
 
         /* Expressions (expressions use their token ID to denote their types */
-        EXP 
+        EXP,
+        TYPE_NAME,
+        ID, /* identifier */
+        INT, /* INT_CONST */
+        CHAR,
+        STR
     } type;
     union {
         int intval;
-        char *strvar;
+        int subtype;
+        char *strval;
     } rec;
     struct CNode *chd, *next;
     /* For error reporting */
@@ -30,3 +46,16 @@ typedef struct {
         int row, col;
     } loc;
 } CNode;
+
+CNode *cnode_create_exp(int exp_type, int pnum, ...);
+CNode *cnode_create_type_spec(int spec_type, int pnum, ...);
+CNode *cnode_append(CNode *node, CNode *tail);
+CNode *cnode_create_identifier(char *val);
+CNode *cnode_create_int_const(int val);
+CNode *cnode_create_char_const(int val);
+CNode *cnode_create_str_const(char *val);
+CNode *cnode_debug_print(CNode *ast);
+
+extern CNode *ast_root;
+
+#endif