patch 9.1.0349: Vim9: need static type for typealias

Commit: 
https://github.com/vim/vim/commit/76ba252e6192580d22737708d69dad7c777fb68a
Author: Yegappan Lakshmanan <yegap...@yahoo.com>
Date:   Thu Apr 18 21:33:27 2024 +0200

    patch 9.1.0349: Vim9: need static type for typealias
    
    Problem:  Vim9: need static type for typealias
    Solution: Refactor the typval2type() function and add a static type for
              typealias (Yegappan Lakshmanan)
    
    closes: #14582
    
    Signed-off-by: Yegappan Lakshmanan <yegap...@yahoo.com>
    Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/src/globals.h b/src/globals.h
index 29ad7edd4..2c00e5f99 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -540,7 +540,10 @@ EXTERN int garbage_collect_at_exit INIT(= FALSE);
 #define t_class                        (static_types[84])
 #define t_const_class          (static_types[85])
 
-EXTERN type_T static_types[86]
+#define t_typealias            (static_types[86])
+#define t_const_typealias      (static_types[87])
+
+EXTERN type_T static_types[88]
 #ifdef DO_INIT
 = {
     // 0: t_unknown
@@ -714,6 +717,10 @@ EXTERN type_T static_types[86]
     // 84: t_class
     {VAR_CLASS, 0, 0, TTFLAG_STATIC, NULL, NULL, NULL},
     {VAR_CLASS, 0, 0, TTFLAG_STATIC|TTFLAG_CONST, NULL, NULL, NULL},
+
+    // 86: t_typealias
+    {VAR_TYPEALIAS, 0, 0, TTFLAG_STATIC, NULL, NULL, NULL},
+    {VAR_TYPEALIAS, 0, 0, TTFLAG_STATIC|TTFLAG_CONST, NULL, NULL, NULL},
 }
 #endif
 ;
diff --git a/src/testdir/test_vim9_builtin.vim 
b/src/testdir/test_vim9_builtin.vim
index 442d375fe..7737cce74 100644
--- a/src/testdir/test_vim9_builtin.vim
+++ b/src/testdir/test_vim9_builtin.vim
@@ -4783,6 +4783,8 @@ def Test_typename()
   if has('channel')
     assert_equal('channel', test_null_channel()->typename())
   endif
+  assert_equal('class<Unknown>', typename(null_class))
+  assert_equal('object<Unknown>', typename(null_object))
 enddef
 
 def Test_undofile()
diff --git a/src/version.c b/src/version.c
index 85156acfe..c32f51bfb 100644
--- a/src/version.c
+++ b/src/version.c
@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    349,
 /**/
     348,
 /**/
diff --git a/src/vim9type.c b/src/vim9type.c
index 691c26bf8..55de0de27 100644
--- a/src/vim9type.c
+++ b/src/vim9type.c
@@ -418,7 +418,127 @@ type_any_or_unknown(type_T *type)
 }
 
 /*
- * Get a type_T for a partial typval in "tv".
+ * Get a type_T for a "special" typval in "tv".
+ */
+    static type_T *
+special_typval2type(typval_T *tv)
+{
+    switch (tv->vval.v_number)
+    {
+       case VVAL_NULL:
+           return &t_null;
+
+       case VVAL_NONE:
+           return &t_none;
+
+       case VVAL_TRUE:
+       case VVAL_FALSE:
+           return &t_bool;
+
+       default:
+           return &t_unknown;
+    }
+}
+
+/*
+ * Get a type_T for a List typval in "tv".
+ * When "flags" has TVTT_DO_MEMBER also get the member type, otherwise use
+ * "any".
+ * When "flags" has TVTT_MORE_SPECIFIC get the more specific member type if it
+ * is "any".
+ */
+    static type_T *
+list_typval2type(typval_T *tv, int copyID, garray_T *type_gap, int flags)
+{
+    list_T     *l = tv->vval.v_list;
+    listitem_T *li;
+    type_T     *member_type = NULL;
+
+    // An empty list has type list<unknown>, unless the type was specified
+    // and is not list<any>.  This matters when assigning to a variable
+    // with a specific list type.
+    if (l == NULL || (l->lv_first == NULL
+               && (l->lv_type == NULL || l->lv_type->tt_member == &t_any)))
+       return &t_list_empty;
+
+    if ((flags & TVTT_DO_MEMBER) == 0)
+       return &t_list_any;
+
+    // If the type is list<any> go through the members, it may end up a
+    // more specific type.
+    if (l->lv_type != NULL && (l->lv_first == NULL
+               || (flags & TVTT_MORE_SPECIFIC) == 0
+               || l->lv_type->tt_member != &t_any))
+       // make a copy, lv_type may be freed if the list is freed
+       return copy_type_deep(l->lv_type, type_gap);
+
+    if (l->lv_first == &range_list_item)
+       return &t_list_number;
+
+    if (l->lv_copyID == copyID)
+       // avoid recursion
+       return &t_list_any;
+
+    l->lv_copyID = copyID;
+
+    // Use the common type of all members.
+    member_type = typval2type(&l->lv_first->li_tv, copyID, type_gap,
+                                                       TVTT_DO_MEMBER);
+    for (li = l->lv_first->li_next; li != NULL; li = li->li_next)
+       common_type(typval2type(&li->li_tv, copyID, type_gap, TVTT_DO_MEMBER),
+                                       member_type, &member_type, type_gap);
+
+    return get_list_type(member_type, type_gap);
+}
+
+/*
+ * Get a type_T for a Dict typval in "tv".
+ * When "flags" has TVTT_DO_MEMBER also get the member type, otherwise use
+ * "any".
+ * When "flags" has TVTT_MORE_SPECIFIC get the more specific member type if it
+ * is "any".
+ */
+    static type_T *
+dict_typval2type(typval_T *tv, int copyID, garray_T *type_gap, int flags)
+{
+    dict_iterator_T    iter;
+    typval_T           *value;
+    dict_T             *d = tv->vval.v_dict;
+    type_T             *member_type = NULL;
+
+    if (d == NULL || (d->dv_hashtab.ht_used == 0 && d->dv_type == NULL))
+       return &t_dict_empty;
+
+    if ((flags & TVTT_DO_MEMBER) == 0)
+       return &t_dict_any;
+
+    // If the type is dict<any> go through the members, it may end up a
+    // more specific type.
+    if (d->dv_type != NULL && (d->dv_hashtab.ht_used == 0
+               || (flags & TVTT_MORE_SPECIFIC) == 0
+               || d->dv_type->tt_member != &t_any))
+       return d->dv_type;
+
+    if (d->dv_copyID == copyID)
+       // avoid recursion
+       return &t_dict_any;
+
+    d->dv_copyID = copyID;
+
+    // Use the common type of all values.
+    dict_iterate_start(tv, &iter);
+    dict_iterate_next(&iter, &value);
+    member_type = typval2type(value, copyID, type_gap, TVTT_DO_MEMBER);
+
+    while (dict_iterate_next(&iter, &value) != NULL)
+       common_type(typval2type(value, copyID, type_gap, TVTT_DO_MEMBER),
+                                       member_type, &member_type, type_gap);
+
+    return get_dict_type(member_type, type_gap);
+}
+
+/*
+ * Get a type_T for a "partial" typval in "tv".
  */
     static type_T *
 partial_typval2type(typval_T *tv, ufunc_T *ufunc, garray_T *type_gap)
@@ -448,169 +568,84 @@ partial_typval2type(typval_T *tv, ufunc_T *ufunc, 
garray_T *type_gap)
 }
 
 /*
- * Get a type_T for a typval_T.
- * "type_gap" is used to temporarily create types in.
- * When "flags" has TVTT_DO_MEMBER also get the member type, otherwise use
- * "any".
- * When "flags" has TVTT_MORE_SPECIFIC get the more specific member type if it
- * is "any".
+ * Get a type_T for a "class" or an "object" typval in "tv".
  */
     static type_T *
-typval2type_int(typval_T *tv, int copyID, garray_T *type_gap, int flags)
+oc_typval2type(typval_T *tv)
 {
-    type_T  *type;
-    type_T  *member_type = NULL;
-    class_T *class_type = NULL;
-    int            argcount = 0;
-    int            min_argcount = 0;
-
-    if (tv->v_type == VAR_NUMBER)
-       return &t_number;
-    if (tv->v_type == VAR_BOOL)
-       return &t_bool;
-    if (tv->v_type == VAR_SPECIAL)
-    {
-       if (tv->vval.v_number == VVAL_NULL)
-           return &t_null;
-       if (tv->vval.v_number == VVAL_NONE)
-           return &t_none;
-       if (tv->vval.v_number == VVAL_TRUE
-               || tv->vval.v_number == VVAL_FALSE)
-           return &t_bool;
-       return &t_unknown;
-    }
-    if (tv->v_type == VAR_STRING)
-       return &t_string;
-    if (tv->v_type == VAR_BLOB)
+    if (tv->v_type == VAR_CLASS)
     {
-       if (tv->vval.v_blob == NULL)
-           return &t_blob_null;
-       return &t_blob;
-    }
+       if (tv->vval.v_class == NULL)
+           return &t_class;
 
-    if (tv->v_type == VAR_LIST)
-    {
-       list_T      *l = tv->vval.v_list;
-       listitem_T  *li;
-
-       // An empty list has type list<unknown>, unless the type was specified
-       // and is not list<any>.  This matters when assigning to a variable
-       // with a specific list type.
-       if (l == NULL || (l->lv_first == NULL
-                  && (l->lv_type == NULL || l->lv_type->tt_member == &t_any)))
-           return &t_list_empty;
-       if ((flags & TVTT_DO_MEMBER) == 0)
-           return &t_list_any;
-       // If the type is list<any> go through the members, it may end up a
-       // more specific type.
-       if (l->lv_type != NULL && (l->lv_first == NULL
-                                          || (flags & TVTT_MORE_SPECIFIC) == 0
-                                          || l->lv_type->tt_member != &t_any))
-           // make a copy, lv_type may be freed if the list is freed
-           return copy_type_deep(l->lv_type, type_gap);
-       if (l->lv_first == &range_list_item)
-           return &t_list_number;
-       if (l->lv_copyID == copyID)
-           // avoid recursion
-           return &t_list_any;
-       l->lv_copyID = copyID;
-
-       // Use the common type of all members.
-       member_type = typval2type(&l->lv_first->li_tv, copyID, type_gap,
-                                                              TVTT_DO_MEMBER);
-       for (li = l->lv_first->li_next; li != NULL; li = li->li_next)
-           common_type(typval2type(&li->li_tv, copyID, type_gap,
-                                                              TVTT_DO_MEMBER),
-                                         member_type, &member_type, type_gap);
-       return get_list_type(member_type, type_gap);
+       return &tv->vval.v_class->class_type;
     }
 
-    if (tv->v_type == VAR_DICT)
+    if (tv->vval.v_object != NULL)
+       return &tv->vval.v_object->obj_class->class_object_type;
+
+    return &t_object;
+}
+
+/*
+ * Get a type_T for a "function" or a "partial"
+ */
+    static type_T *
+fp_typval2type(typval_T *tv, garray_T *type_gap)
+{
+    char_u     *name = NULL;
+    ufunc_T    *ufunc = NULL;
+    type_T     *type;
+    type_T     *member_type = NULL;
+    int                argcount = 0;
+    int                min_argcount = 0;
+
+    if (tv->v_type == VAR_PARTIAL && tv->vval.v_partial != NULL)
     {
-       dict_iterator_T iter;
-       typval_T        *value;
-       dict_T          *d = tv->vval.v_dict;
-
-       if (d == NULL || (d->dv_hashtab.ht_used == 0 && d->dv_type == NULL))
-           return &t_dict_empty;
-       if ((flags & TVTT_DO_MEMBER) == 0)
-           return &t_dict_any;
-       // If the type is dict<any> go through the members, it may end up a
-       // more specific type.
-       if (d->dv_type != NULL && (d->dv_hashtab.ht_used == 0
-                                          || (flags & TVTT_MORE_SPECIFIC) == 0
-                                          || d->dv_type->tt_member != &t_any))
-           return d->dv_type;
-       if (d->dv_copyID == copyID)
-           // avoid recursion
-           return &t_dict_any;
-       d->dv_copyID = copyID;
-
-       // Use the common type of all values.
-       dict_iterate_start(tv, &iter);
-       dict_iterate_next(&iter, &value);
-       member_type = typval2type(value, copyID, type_gap, TVTT_DO_MEMBER);
-       while (dict_iterate_next(&iter, &value) != NULL)
-           common_type(typval2type(value, copyID, type_gap, TVTT_DO_MEMBER),
-                                         member_type, &member_type, type_gap);
-       return get_dict_type(member_type, type_gap);
+       if (tv->vval.v_partial->pt_func != NULL)
+           ufunc = tv->vval.v_partial->pt_func;
+       else
+           name = tv->vval.v_partial->pt_name;
     }
+    else
+       name = tv->vval.v_string;
+
+    if (name == NULL && ufunc == NULL)
+       return &t_func_unknown;
 
-    if (tv->v_type == VAR_FUNC || tv->v_type == VAR_PARTIAL)
+    if (name != NULL)
     {
-       char_u  *name = NULL;
-       ufunc_T *ufunc = NULL;
+       int idx = find_internal_func(name);
 
-       if (tv->v_type == VAR_PARTIAL && tv->vval.v_partial != NULL)
-       {
-           if (tv->vval.v_partial->pt_func != NULL)
-               ufunc = tv->vval.v_partial->pt_func;
-           else
-               name = tv->vval.v_partial->pt_name;
-       }
-       else
-           name = tv->vval.v_string;
-       if (name == NULL && ufunc == NULL)
-           return &t_func_unknown;
-       if (name != NULL)
+       if (idx >= 0)
        {
-           int idx = find_internal_func(name);
+           type_T *decl_type;  // unused
 
-           if (idx >= 0)
-           {
-               type_T *decl_type;  // unused
-
-               internal_func_get_argcount(idx, &argcount, &min_argcount);
-               member_type = internal_func_ret_type(idx, 0, NULL, &decl_type,
-                                                                    type_gap);
-           }
-           else
-               ufunc = find_func(name, FALSE);
+           internal_func_get_argcount(idx, &argcount, &min_argcount);
+           member_type = internal_func_ret_type(idx, 0, NULL, &decl_type,
+                   type_gap);
        }
-       if (ufunc != NULL)
+       else
+           ufunc = find_func(name, FALSE);
+    }
+    if (ufunc != NULL)
+    {
+       // May need to get the argument types from default values by
+       // compiling the function.
+       if (ufunc->uf_def_status == UF_TO_BE_COMPILED
+               && compile_def_function(ufunc, TRUE, CT_NONE, NULL)
+               == FAIL)
+           return NULL;
+       if (ufunc->uf_func_type == NULL)
+           set_function_type(ufunc);
+       if (ufunc->uf_func_type != NULL)
        {
-           // May need to get the argument types from default values by
-           // compiling the function.
-           if (ufunc->uf_def_status == UF_TO_BE_COMPILED
-                           && compile_def_function(ufunc, TRUE, CT_NONE, NULL)
-                                                                      == FAIL)
-               return NULL;
-           if (ufunc->uf_func_type == NULL)
-               set_function_type(ufunc);
-           if (ufunc->uf_func_type != NULL)
-           {
-               if (tv->v_type == VAR_PARTIAL && tv->vval.v_partial != NULL)
-                   return partial_typval2type(tv, ufunc, type_gap);
-               return ufunc->uf_func_type;
-           }
+           if (tv->v_type == VAR_PARTIAL && tv->vval.v_partial != NULL)
+               return partial_typval2type(tv, ufunc, type_gap);
+           return ufunc->uf_func_type;
        }
     }
 
-    if (tv->v_type == VAR_CLASS)
-       class_type = tv->vval.v_class;
-    else if (tv->v_type == VAR_OBJECT && tv->vval.v_object != NULL)
-       class_type = tv->vval.v_object->obj_class;
-
     type = get_type_ptr(type_gap);
     if (type == NULL)
        return NULL;
@@ -618,17 +653,89 @@ typval2type_int(typval_T *tv, int copyID, garray_T 
*type_gap, int flags)
     type->tt_argcount = argcount;
     type->tt_min_argcount = min_argcount;
     if (tv->v_type == VAR_PARTIAL && tv->vval.v_partial != NULL
-                                           && tv->vval.v_partial->pt_argc > 0)
+                                       && tv->vval.v_partial->pt_argc > 0)
     {
        type->tt_argcount -= tv->vval.v_partial->pt_argc;
        type->tt_min_argcount -= tv->vval.v_partial->pt_argc;
     }
     type->tt_member = member_type;
-    type->tt_class = class_type;
 
     return type;
 }
 
+/*
+ * Get a type_T for a typval_T.
+ * "type_gap" is used to temporarily create types in.
+ * When "flags" has TVTT_DO_MEMBER also get the member type, otherwise use
+ * "any".
+ * When "flags" has TVTT_MORE_SPECIFIC get the more specific member type if it
+ * is "any".
+ */
+    static type_T *
+typval2type_int(typval_T *tv, int copyID, garray_T *type_gap, int flags)
+{
+    switch (tv->v_type)
+    {
+       case VAR_UNKNOWN:
+           return &t_unknown;
+
+       case VAR_ANY:
+           return &t_any;
+
+       case VAR_VOID:
+           return &t_void;
+
+       case VAR_BOOL:
+           return &t_bool;
+
+       case VAR_SPECIAL:
+           return special_typval2type(tv);
+
+       case VAR_NUMBER:
+           return &t_number;
+
+       case VAR_FLOAT:
+           return &t_float;
+
+       case VAR_STRING:
+           return &t_string;
+
+       case VAR_BLOB:
+           if (tv->vval.v_blob == NULL)
+               return &t_blob_null;
+           return &t_blob;
+
+       case VAR_LIST:
+           return list_typval2type(tv, copyID, type_gap, flags);
+
+       case VAR_DICT:
+           return dict_typval2type(tv, copyID, type_gap, flags);
+
+       case VAR_JOB:
+           return &t_job;
+
+       case VAR_CHANNEL:
+           return &t_channel;
+
+       case VAR_CLASS:
+       case VAR_OBJECT:
+           return oc_typval2type(tv);
+
+       case VAR_TYPEALIAS:
+           return &t_typealias;
+
+       case VAR_FUNC:
+       case VAR_PARTIAL:
+           return fp_typval2type(tv, type_gap);
+
+       case VAR_INSTR:
+       default:
+           break;
+    }
+
+    return NULL;
+}
+
 /*
  * Return TRUE if "tv" is not a bool but should be converted to bool.
  */

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