From 9fcf1a0190a6cc9e379448d14b628fd3b93a4d32 Mon Sep 17 00:00:00 2001
From: Leo Tenenbaum <pommicket@gmail.com>
Date: Sun, 22 Mar 2020 00:01:29 -0400
Subject: more use

---
 test.toc |  8 +++++---
 types.c  |  1 +
 types.h  | 11 +++++++++++
 3 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/test.toc b/test.toc
index d27fae6..8e611c0 100644
--- a/test.toc
+++ b/test.toc
@@ -1,6 +1,8 @@
-#include "std/mem.toc";
+Point ::= struct {
+	x, y: int;
+}
 
 main ::= fn() {
-	thing := new(int);
-	del(thing);
+	p: Point;
+	use p;
 }
diff --git a/types.c b/types.c
index b9c9ebd..109fa68 100644
--- a/types.c
+++ b/types.c
@@ -3480,6 +3480,7 @@ static Status types_stmt(Typer *tr, Statement *s) {
 }
 
 static void typer_create(Typer *tr, Evaluator *ev, ErrCtx *err_ctx, Allocator *allocr, Identifiers *idents) {
+	tr->used = NULL;
 	tr->block = NULL;
 	tr->blocks = NULL;
 	tr->fn = NULL;
diff --git a/types.h b/types.h
index 195c97e..0b0fcbb 100644
--- a/types.h
+++ b/types.h
@@ -1033,6 +1033,16 @@ typedef struct Evaluator {
 	ForeignFnManager ffmgr;
 } Evaluator;
 
+/*
+Keeps track of use stmts.
+We need to keep track of the block so that 
+it can be removed when we exit the block.
+*/
+typedef struct {
+	Statement *stmt;
+	Block *scope;
+} UsedExpr;
+
 typedef struct Typer {
 	Allocator *allocr;
 	Evaluator *evalr;
@@ -1046,6 +1056,7 @@ typedef struct Typer {
 	ParsedFile *parsed_file;
 	Namespace *nms;
 	StrHashTable included_files; /* maps to IncludedFile */
+	UsedExpr *used; /* things which are currently being `use`d */
 } Typer;
 
 typedef struct CGenerator {
-- 
cgit v1.2.3