add AST

3 files changed, 36 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index 6deae78..b6eeb33 100644
--- a/Makefile
+++ b/Makefile
@@ -9,3 +9,6 @@ lex.yy.c: cibic.l
 	flex cibic.l
 cibic.tab.c: cibic.y
 	bison -d cibic.y
+
+clean:
+	rm -f cibic lex.yy.c cibic.tab.c
diff --git a/ast.h b/ast.h
new file mode 100644
index 0000000..f6db7da
--- /dev/null
+++ b/ast.h
@@ -0,0 +1,32 @@
+typedef struct {
+    enum {
+        /* Top Level */
+        PROG = 1024,  FUNC_DEF, PARAMS, 
+        DECL, /* declaration */
+        DECLR, /* declarator */
+        DECLRS, 
+        INIT_DECLRS, INIT_DECLR, 
+        INITR, /* initializer */
+        TYPE_SPEC,
+        STRUCT, UNION, 
+        PLAIN_DECL, PLAIN_DECLR,
+
+        /* Statments */
+        EXP_STMT, /* expression-statment */
+        COMP_STMT, IF_STMT, /* selection-statment */
+        WHILE_STMT, FOR_STMT,
+        CONT_STMT , BREAK_STMT, RET_STMT, /* 'continue', 'break', 'return' */
+
+        /* Expressions (expressions use their token ID to denote their types */
+        EXP 
+    } type;
+    union {
+        int intval;
+        char *strvar;
+    } rec;
+    struct CNode *chd, *next;
+    /* For error reporting */
+    struct Location {
+        int row, col;
+    } loc;
+} CNode;
diff --git a/cibic.y b/cibic.y
index 92f0cfe..a27c247 100644
--- a/cibic.y
+++ b/cibic.y
@@ -1,5 +1,6 @@
 %{
 #include <stdio.h>
+#include "ast.h"
 %}
 %token IDENTIFIER INT_CONST CHAR_CONST STR_CONST
 %token KW_VOID KW_CHAR KW_INT KW_STRUCT KW_UNION KW_IF KW_ELSE KW_WHILE