1 files changed, 13 insertions, 2 deletions
diff --git a/eval.h b/eval.h
index c2365cc..924ad92 100644
--- a/eval.h
+++ b/eval.h
@@ -6,6 +6,7 @@
 #include <stdint.h>
 
 #define VARIABLES_MAX 64
+#define FUNCTIONS_MAX 32
 
 // the longest thing a single type can say when emitted
 #define TEXT_LENGTH_MAX 255
@@ -23,7 +24,6 @@ enum TypeKind
     KIND_VALUE
 };
 
-// a tuple keeps what it will say, already said, so nothing inside it can go out of scope
 struct Type
 {
     enum TypeKind kind;
@@ -38,15 +38,26 @@ struct Variable
     bool declared;
 };
 
+struct Function
+{
+    char name[NAME_LENGTH_MAX + 1];
+    const struct Node* node;
+    bool defined;
+};
+
 struct Machine
 {
     struct Variable variables[VARIABLES_MAX];
+    struct Function functions[FUNCTIONS_MAX];
+    struct Type returned;
+    int depth;
 };
 
 enum RunStatus
 {
     RUN_DONE,
-    RUN_FAILED
+    RUN_FAILED,
+    RUN_RETURNED
 };
 
 void machine_init(struct Machine* machine);