widl: Pass a decl_spec_t to type_new_alias().

tools/widl/parser.y

@@ -1188,7 +1188,8 @@ static void decl_builtin_basic(const char *name, enum type_basic_type type)
 
 static void decl_builtin_alias(const char *name, type_t *t)
 {
-  reg_type(type_new_alias(t, name), name, NULL, 0);
+    const decl_spec_t ds = {.type = t};
+    reg_type(type_new_alias(&ds, name), name, NULL, 0);
 }
 
 void init_types(void)
@@ -1802,7 +1803,8 @@ static declarator_t *make_declarator(var_t *var)
 
 static type_t *make_safearray(type_t *type)
 {
-    const decl_spec_t ds = {.type = type_new_alias(type, "SAFEARRAY")};
+    decl_spec_t ds = {.type = type};
+    ds.type = type_new_alias(&ds, "SAFEARRAY");
     return type_new_array(NULL, &ds, TRUE, 0, NULL, NULL, FC_RP);
 }
 
@@ -1975,7 +1977,7 @@ static type_t *reg_typedefs(decl_spec_t *decl_spec, declarator_list_t *decls, at
                     cur->loc_info.line_number);
 
       name = declare_var(attrs, decl_spec, decl, 0);
-      cur = type_new_alias(name->declspec.type, name->name);
+      cur = type_new_alias(&name->declspec, name->name);
       cur->attrs = attrs;
 
       if (is_incomplete(cur))

tools/widl/typetree.c

@@ -184,13 +184,13 @@ type_t *type_new_pointer(unsigned char pointer_default, type_t *ref, attr_list_t
     return t;
 }
 
-type_t *type_new_alias(type_t *t, const char *name)
+type_t *type_new_alias(const decl_spec_t *t, const char *name)
 {
     type_t *a = make_type(TYPE_ALIAS);
 
     a->name = xstrdup(name);
     a->attrs = NULL;
-    a->details.alias.aliasee.type = t;
+    a->details.alias.aliasee = *t;
     init_loc_info(&a->loc_info);
 
     return a;

tools/widl/typetree.h

@@ -31,7 +31,7 @@ enum name_type {
 
 type_t *type_new_function(var_list_t *args);
 type_t *type_new_pointer(unsigned char pointer_default, type_t *ref, attr_list_t *attrs);
-type_t *type_new_alias(type_t *t, const char *name);
+type_t *type_new_alias(const decl_spec_t *t, const char *name);
 type_t *type_new_module(char *name);
 type_t *type_new_array(const char *name, const decl_spec_t *element, int declptr,
                        unsigned int dim, expr_t *size_is, expr_t *length_is,