From b8d9ad1f6636f46a832b0f949ce7525ae08f53bd Mon Sep 17 00:00:00 2001
From: lemon <lsof@mailbox.org>
Date: Sat, 6 Aug 2022 14:10:19 +0200
Subject: basic method calls & many bugfix

---
 bootstrap/env.c | 28 ++++++++++++++++++++++------
 1 file changed, 22 insertions(+), 6 deletions(-)

(limited to 'bootstrap/env.c')

diff --git a/bootstrap/env.c b/bootstrap/env.c
index 0c0021b..477c267 100644
--- a/bootstrap/env.c
+++ b/bootstrap/env.c
@@ -30,21 +30,37 @@ declscompatible(const struct decl *a, const struct decl *b) {
    return 0;
 }
 
-bool
+struct decl *
 envput(struct env *env, const struct decl *decl) {
    struct decls *decls;
    struct env env_noparent = {
      .decls = env->decls
    };
-   struct decl *decl0;
-   if ((decl0 = envfind(&env_noparent, decl->name))) {
-      if (!declsshadowable(decl0, decl) && !declscompatible(decl0, decl))
-         return 0;
+   struct decl *d0;
+   if ((d0 = envfind(&env_noparent, decl->name))) {
+      for (int kind = TYstruct; kind <= TYunion; ++kind) {
+         if (d0->t == Dtype && d0->ty->t == kind
+          && decl->t == Dtype && decl->ty->t == kind && d0->ty->agg.fwd) {
+            // modify existing forward declaration
+            *(size_t *)&d0->ty->size = decl->ty->size;
+            *(size_t *)&d0->ty->align = decl->ty->align;
+            *(bool *)&d0->ty->agg.fwd = 0;
+            memcpy((void *)&d0->ty->agg.flds, &decl->ty->agg.flds,
+                  sizeof d0->ty->agg.flds);
+            memcpy((void *)&d0->ty->agg.decls, &decl->ty->agg.decls,
+                  sizeof d0->ty->agg.decls);
+            d0->span = decl->span;
+            return d0;
+         }
+      }
+      if (!declsshadowable(d0, decl) && !declscompatible(d0, decl)) {
+         return NULL;
+      }
    }
 
    decls = xcalloc(1, sizeof *decls);
    decls->next = env->decls;
    decls->decl = *decl;
    env->decls = decls;
-   return 1;
+   return &decls->decl;
 }
-- 
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