class static block (initial patch by bnoordhuis)

TODO

@@ -63,5 +63,5 @@ Optimization ideas:
 Test262o:   0/11262 errors, 463 excluded
 Test262o commit: 7da91bceb9ce7613f87db47ddd1292a2dda58b42 (es5-tests branch)
 
-Result: 16/76783 errors, 1497 excluded, 8199 skipped
+Result: 16/76909 errors, 1497 excluded, 8136 skipped
 Test262 commit: 6cbb6da9473c56d95358d8e679c5a6d2b4574efb

quickjs.c

@@ -19688,6 +19688,7 @@ typedef enum JSParseFunctionEnum {
     JS_PARSE_FUNC_GETTER,
     JS_PARSE_FUNC_SETTER,
     JS_PARSE_FUNC_METHOD,
+    JS_PARSE_FUNC_CLASS_STATIC_INIT,
     JS_PARSE_FUNC_CLASS_CONSTRUCTOR,
     JS_PARSE_FUNC_DERIVED_CLASS_CONSTRUCTOR,
 } JSParseFunctionEnum;
@@ -20574,10 +20575,12 @@ static __exception int next_token(JSParseState *s)
                (s->cur_func->parent->func_kind & JS_FUNC_GENERATOR)))) ||
             (s->token.u.ident.atom == JS_ATOM_await &&
              (s->is_module ||
-              (((s->cur_func->func_kind & JS_FUNC_ASYNC) ||
+              (s->cur_func->func_kind & JS_FUNC_ASYNC) ||
+              s->cur_func->func_type == JS_PARSE_FUNC_CLASS_STATIC_INIT ||
               (s->cur_func->func_type == JS_PARSE_FUNC_ARROW &&
                !s->cur_func->in_function_body && s->cur_func->parent &&
-                 (s->cur_func->parent->func_kind & JS_FUNC_ASYNC))))))) {
+               ((s->cur_func->parent->func_kind & JS_FUNC_ASYNC) ||
+                s->cur_func->parent->func_type == JS_PARSE_FUNC_CLASS_STATIC_INIT))))) {
             if (ident_has_escape) {
                 s->token.u.ident.is_reserved = TRUE;
                 s->token.val = TOK_IDENT;
@@ -22810,6 +22813,49 @@ static __exception int js_parse_class(JSParseState *s, BOOL is_class_expr,
         if (is_static) {
             if (next_token(s))
                 goto fail;
+            if (s->token.val == '{') {
+                ClassFieldsDef *cf = &class_fields[is_static];
+                JSFunctionDef *init;
+                if (!cf->fields_init_fd) {
+                    if (emit_class_init_start(s, cf))
+                        goto fail;
+                }
+                s->cur_func = cf->fields_init_fd;
+                /* XXX: could try to avoid creating a new function and
+                   reuse 'fields_init_fd' with a specific 'var'
+                   scope */
+                // stack is now: <empty>
+                if (js_parse_function_decl2(s, JS_PARSE_FUNC_CLASS_STATIC_INIT,
+                                            JS_FUNC_NORMAL, JS_ATOM_NULL,
+                                            s->token.ptr, s->token.line_num,
+                                            JS_PARSE_EXPORT_NONE, &init) < 0) {
+                    goto fail;
+                }
+                // stack is now: fclosure
+                push_scope(s);
+                emit_op(s, OP_scope_get_var);
+                emit_atom(s, JS_ATOM_this);
+                emit_u16(s, 0);
+                // stack is now: fclosure this
+                /* XXX: should do it only once */
+                if (class_name != JS_ATOM_NULL) {
+                    // TODO(bnoordhuis) pass as argument to init method?
+                    emit_op(s, OP_dup);
+                    emit_op(s, OP_scope_put_var_init);
+                    emit_atom(s, class_name);
+                    emit_u16(s, s->cur_func->scope_level);
+                }
+                emit_op(s, OP_swap);
+                // stack is now: this fclosure
+                emit_op(s, OP_call_method);
+                emit_u16(s, 0);
+                // stack is now: returnvalue
+                emit_op(s, OP_drop);
+                // stack is now: <empty>
+                pop_scope(s);
+                s->cur_func = s->cur_func->parent;
+                continue;
+            }
             /* allow "static" field name */
             if (s->token.val == ';' || s->token.val == '=') {
                 is_static = FALSE;
@@ -26127,6 +26173,10 @@ static __exception int js_parse_statement_or_decl(JSParseState *s,
             js_parse_error(s, "return not in a function");
             goto fail;
         }
+        if (s->cur_func->func_type == JS_PARSE_FUNC_CLASS_STATIC_INIT) {
+            js_parse_error(s, "return in a static initializer block");
+            goto fail;
+        }
         if (next_token(s))
             goto fail;
         if (s->token.val != ';' && s->token.val != '}' && !s->got_lf) {
@@ -33278,8 +33328,9 @@ static __exception int js_parse_function_decl2(JSParseState *s,
                  func_type == JS_PARSE_FUNC_EXPR &&
                  (func_kind & JS_FUNC_GENERATOR)) ||
                 (s->token.u.ident.atom == JS_ATOM_await &&
-                 func_type == JS_PARSE_FUNC_EXPR &&
+                 ((func_type == JS_PARSE_FUNC_EXPR &&
-                 (func_kind & JS_FUNC_ASYNC))) {
+                   (func_kind & JS_FUNC_ASYNC)) ||
+                  func_type == JS_PARSE_FUNC_CLASS_STATIC_INIT))) {
                 return js_parse_error_reserved_identifier(s);
             }
         }
@@ -33373,7 +33424,8 @@ static __exception int js_parse_function_decl2(JSParseState *s,
                            func_type == JS_PARSE_FUNC_SETTER ||
                            func_type == JS_PARSE_FUNC_CLASS_CONSTRUCTOR ||
                            func_type == JS_PARSE_FUNC_DERIVED_CLASS_CONSTRUCTOR);
-    fd->has_arguments_binding = (func_type != JS_PARSE_FUNC_ARROW);
+    fd->has_arguments_binding = (func_type != JS_PARSE_FUNC_ARROW &&
+                                 func_type != JS_PARSE_FUNC_CLASS_STATIC_INIT);
     fd->has_this_binding = fd->has_arguments_binding;
     fd->is_derived_class_constructor = (func_type == JS_PARSE_FUNC_DERIVED_CLASS_CONSTRUCTOR);
     if (func_type == JS_PARSE_FUNC_ARROW) {
@@ -33381,6 +33433,11 @@ static __exception int js_parse_function_decl2(JSParseState *s,
         fd->super_call_allowed = fd->parent->super_call_allowed;
         fd->super_allowed = fd->parent->super_allowed;
         fd->arguments_allowed = fd->parent->arguments_allowed;
+    } else if (func_type == JS_PARSE_FUNC_CLASS_STATIC_INIT) {
+        fd->new_target_allowed = TRUE; // although new.target === undefined
+        fd->super_call_allowed = FALSE;
+        fd->super_allowed = TRUE;
+        fd->arguments_allowed = FALSE;
     } else {
         fd->new_target_allowed = TRUE;
         fd->super_call_allowed = fd->is_derived_class_constructor;
@@ -33418,7 +33475,7 @@ static __exception int js_parse_function_decl2(JSParseState *s,
         if (add_arg(ctx, fd, name) < 0)
             goto fail;
         fd->defined_arg_count = 1;
-    } else {
+    } else if (func_type != JS_PARSE_FUNC_CLASS_STATIC_INIT) {
         if (s->token.val == '(') {
             int skip_bits;
             /* if there is an '=' inside the parameter list, we
@@ -33639,8 +33696,10 @@ static __exception int js_parse_function_decl2(JSParseState *s,
         }
     }
 
+    if (func_type != JS_PARSE_FUNC_CLASS_STATIC_INIT) {
         if (js_parse_expect(s, '{'))
             goto fail;
+    }
 
     if (js_parse_directives(s))
         goto fail;

test262.conf

@@ -79,7 +79,7 @@ class-fields-private
 class-fields-private-in=skip
 class-fields-public
 class-methods-private
-class-static-block=skip
+class-static-block
 class-static-fields-private
 class-static-fields-public
 class-static-methods-private