warnings: useless semantic types

* src/symtab.h (symbol_list): Represent semantic types as structure
'semantic_type'.
* src/symlist.c (symbol_list_type_new): Allocate this structure.
(symbol_list_code_props_set): Set this semantic type's status to used if it
was not declared.
* src/symtab.c (semantic_types_sorted): New.
(semantic_type_new): Set the new semantic type's location appropriately.
(symbol_check_defined): If a symbol has a type, then set this type's status
to "declared".
(semantic_type_check_defined, semantic_type_check_defined_processor): Same
as symbol_check_defined and symbol_check_defined_processor, but for semantic
types.
(symbol_check_defined): Check semantic types usefulness.
* src/symtab.h (semantic_type): New fields 'location' and 'status'.
* src/symtab.h, src/symtab.c (semantic_type_new)
(semantic_type_from_uniqstr, semantic_type_get): Accept a location as a
supplementary argument.
* tests/input.at (Unassociated types used for printer of destructor): New.
* tests/c++.at (AT_CHECK_VARIANTS): Fix an error caught by this commit.

1 files changed, 9 insertions, 2 deletions

diff --git a/src/symlist.c b/src/symlist.c
index abea6ce7..48828315 100644
--- a/src/symlist.c
+++ b/src/symlist.c
@@ -66,7 +66,11 @@ symbol_list_type_new (uniqstr type_name, location loc)
   symbol_list *res = xmalloc (sizeof *res);
 
   res->content_type = SYMLIST_TYPE;
-  res->content.type_name = type_name;
+  res->content.sem_type = xmalloc (sizeof (semantic_type));
+  res->content.sem_type->tag = type_name;
+  res->content.sem_type->location = loc;
+  res->content.sem_type->status = undeclared;
+
   res->location = res->sym_loc = loc;
   res->named_ref = NULL;
   res->next = NULL;
@@ -238,8 +242,11 @@ symbol_list_code_props_set (symbol_list *node, code_props_type kind,
         break;
       case SYMLIST_TYPE:
         semantic_type_code_props_set
-          (semantic_type_get (node->content.type_name),
+          (semantic_type_get (node->content.sem_type->tag,
+                              &node->content.sem_type->location),
            kind, &cprops);
+        if (node->content.sem_type->status == undeclared)
+          node->content.sem_type->status = used;
         break;
       case SYMLIST_DEFAULT_TAGGED:
         default_tagged_code_props_set (kind, &cprops);