add local variables and (let) form

1 files changed, 14 insertions, 0 deletions

diff --git a/com.h b/com.h
index 26b7494..c623d49 100644
--- a/com.h
+++ b/com.h
@@ -7,10 +7,24 @@ typedef struct _compiler Compiler;
 #include "chunk.h"
 
 
+typedef struct {
+	char *name;
+	uint8_t slot;
+} Local;
+
+#define MAX_LOCALS 256
+typedef struct _scope Scope;
+struct _scope {
+	Scope *outer;
+	uint8_t nlocals;
+	Local locals[MAX_LOCALS];
+};
+
 struct _compiler {
 	State *S;
 	Chunk *ch;
 	int stack_cur;
+	Scope *scope;
 };
 Compiler compiler_new(Compiler *outer, Chunk *ch);