woah we got variables

1 files changed, 42 insertions, 15 deletions

diff --git a/ast.h b/ast.h
index b058487..e5354ae 100644
--- a/ast.h
+++ b/ast.h
@@ -5,7 +5,19 @@ struct stmt_node;
 struct expr_node;
 
 struct type_node {
-    char* type;
+    bool _unsigned;
+    bool _short;
+    bool _long;
+    unsigned char ptr_level;
+    char* name;
+};
+
+struct int_lit_node {
+    long long val;
+};
+
+struct var_ref_node {
+    char* ident;
 };
 
 struct var_decl_node {
@@ -15,6 +27,35 @@ struct var_decl_node {
     struct var_decl_node* next;
 };
 
+struct lval_node {
+    enum {
+        LVAL_VAR_DECL,
+        LVAL_VAR_USE,
+    } type;
+    union {
+        struct var_ref_node _var_ref;
+        struct var_decl_node _var_decl;
+    } as;
+};
+
+/* TODO: add to expression, parse */
+struct assign_node {
+    struct lval_node lval;
+    struct expr_node* rval;
+};
+
+struct expr_node {
+    enum {
+        EXPR_EMPTY,
+        EXPR_INT_LIT,
+        EXPR_VAR_REF,
+    } type;
+    union {
+        struct int_lit_node _int_lit;
+        struct var_ref_node _var_ref;
+    } as;
+};
+
 struct group_node {
     struct stmt_node* body_head;
 };
@@ -30,20 +71,6 @@ struct return_node {
     struct expr_node* ret_val; /* null to return void */
 };
 
-struct int_lit_node {
-    long long val;
-};
-
-struct expr_node {
-    enum {
-        EXPR_EMPTY,
-        EXPR_INT_LIT,
-    } type;
-    union {
-        struct int_lit_node _int_lit;
-    } as;
-};
-
 struct stmt_node {
     enum {
         STMT_EXPR,