1 files changed, 12 insertions, 1 deletions
diff --git a/c/libdietc.h b/c/libdietc.h
index e63af8d..4dea137 100644
--- a/c/libdietc.h
+++ b/c/libdietc.h
@@ -38,9 +38,19 @@ struct type {
     unsigned long is_variadic;
 };
 
+enum INSTRUCTION_TYPE {
+    INSTRUCTION_DECLARE,
+    INSTRUCTION_DEREF_ASSIGN,
+    INSTRUCTION_ASSIGN_DEREF,
+    INSTRUCTION_CAST,
+    INSTRUCTION_COPY,
+    INSTRUCTION_OTHER,
+};
+
 struct instruction {
     char *line;
-    struct instruction *next;
+    enum INSTRUCTION_TYPE kind;
+    struct instruction *next, **pprev;
 };
 
 struct function {
@@ -83,3 +93,4 @@ struct program libdietc_parse(char *filename);
 void libdietc_print(struct program program);
 char *libdietc_nth_token(char *string, int n);
 struct type *libdietc_object_type(struct program program, char *name);
+struct type *libdietc_lhs_type(struct program program, struct instruction *instruction);