fmt: write empty or blocks the same as empty fn bodies, empty structs, etc (#9136)

vlib/os/file_test.v

@@ -29,7 +29,7 @@ const another_point = Point{0.25, 2.25, 6.25}
 const extended_point = Extended_Point{1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0}
 
 fn testsuite_begin() {
-	os.rmdir_all(tfolder) or { }
+	os.rmdir_all(tfolder) or {}
 	assert !os.is_dir(tfolder)
 	os.mkdir_all(tfolder) or { panic(err) }
 	os.chdir(tfolder)

vlib/os/inode_test.v

@@ -9,7 +9,7 @@ const (
 
 fn testsuite_begin() {
 	eprintln('testsuite_begin, tfolder = $tfolder')
-	os.rmdir_all(tfolder) or { }
+	os.rmdir_all(tfolder) or {}
 	assert !os.is_dir(tfolder)
 	os.mkdir_all(tfolder) or { panic(err) }
 	os.chdir(tfolder)
@@ -36,7 +36,7 @@ fn test_inode_file_owner_permission() {
 	mut file := os.open_file(filename, 'w', 0o600) or { return }
 	file.close()
 	mode := os.inode(filename)
-	os.rm(filename) or { }
+	os.rm(filename) or {}
 	assert mode.owner.read
 	assert mode.owner.write
 	assert !mode.owner.execute

vlib/os/os_test.v

@@ -13,7 +13,7 @@ const args_at_start = os.args.clone()
 
 fn testsuite_begin() {
 	eprintln('testsuite_begin, tfolder = $tfolder')
-	os.rmdir_all(tfolder) or { }
+	os.rmdir_all(tfolder) or {}
 	assert !os.is_dir(tfolder)
 	os.mkdir_all(tfolder) or { panic(err) }
 	os.chdir(tfolder)
@@ -25,7 +25,7 @@ fn testsuite_begin() {
 
 fn testsuite_end() {
 	os.chdir(os.wd_at_startup)
-	os.rmdir_all(tfolder) or { }
+	os.rmdir_all(tfolder) or {}
 	assert !os.is_dir(tfolder)
 	// eprintln('testsuite_end  , tfolder = $tfolder removed.')
 }
@@ -280,7 +280,7 @@ fn test_tmpdir() {
 	assert t.len > 0
 	assert os.is_dir(t)
 	tfile := t + os.path_separator + 'tmpfile.txt'
-	os.rm(tfile) or { } // just in case
+	os.rm(tfile) or {} // just in case
 	tfile_content := 'this is a temporary file'
 	os.write_file(tfile, tfile_content) or { panic(err) }
 	tfile_content_read := os.read_file(tfile) or { panic(err) }
@@ -305,8 +305,8 @@ fn test_make_symlink_check_is_link_and_remove_symlink() {
 	}
 	folder := 'tfolder'
 	symlink := 'tsymlink'
-	os.rm(symlink) or { }
+	os.rm(symlink) or {}
-	os.rm(folder) or { }
+	os.rm(folder) or {}
 	os.mkdir(folder) or { panic(err) }
 	folder_contents := os.ls(folder) or { panic(err) }
 	assert folder_contents.len == 0
@@ -538,6 +538,6 @@ fn test_posix_set_bit() {
 		}
 		mode = u32(s.st_mode) & 0o7777
 		assert mode == 0o0755
-		rm(fpath) or { }
+		rm(fpath) or {}
 	}
 }

vlib/os/process_test.v

@@ -10,7 +10,7 @@ const test_os_process = os.join_path(os.temp_dir(), 'v', 'test_os_process.exe')
 const test_os_process_source = os.join_path(vroot, 'cmd/tools/test_os_process.v')
 
 fn testsuite_begin() {
-	os.rm(test_os_process) or { }
+	os.rm(test_os_process) or {}
 	assert os.system('$vexe -o $test_os_process $test_os_process_source') == 0
 }
 

vlib/v/checker/checker.v

@@ -455,7 +455,7 @@ pub fn (mut c Checker) struct_init(mut struct_init ast.StructInit) table.Type {
 		}
 	}
 	utyp := c.unwrap_generic(struct_init.typ)
-	c.ensure_type_exists(utyp, struct_init.pos) or { }
+	c.ensure_type_exists(utyp, struct_init.pos) or {}
 	type_sym := c.table.get_type_symbol(utyp)
 	if type_sym.kind == .sum_type && struct_init.fields.len == 1 {
 		sexpr := struct_init.fields[0].expr.str()
@@ -1846,7 +1846,7 @@ pub fn (mut c Checker) call_fn(mut call_expr ast.CallExpr) table.Type {
 		c.error('cannot call a function that does not have a body', call_expr.pos)
 	}
 	for generic_type in call_expr.generic_types {
-		c.ensure_type_exists(generic_type, call_expr.generic_list_pos) or { }
+		c.ensure_type_exists(generic_type, call_expr.generic_list_pos) or {}
 	}
 	if f.generic_names.len > 0 && f.return_type.has_flag(.generic) {
 		rts := c.table.get_type_symbol(f.return_type)
@@ -1855,7 +1855,7 @@ pub fn (mut c Checker) call_fn(mut call_expr ast.CallExpr) table.Type {
 				gts := c.table.get_type_symbol(call_expr.generic_types[0])
 				nrt := '$rts.name<$gts.name>'
 				idx := c.table.type_idxs[nrt]
-				c.ensure_type_exists(idx, call_expr.pos) or { }
+				c.ensure_type_exists(idx, call_expr.pos) or {}
 				call_expr.return_type = table.new_type(idx).derive(f.return_type)
 			}
 		}
@@ -2965,7 +2965,7 @@ pub fn (mut c Checker) array_init(mut array_init ast.ArrayInit) table.Type {
 				c.error('cannot initalize sum type array without default value', array_init.elem_type_pos)
 			}
 		}
-		c.ensure_type_exists(array_init.elem_type, array_init.elem_type_pos) or { }
+		c.ensure_type_exists(array_init.elem_type, array_init.elem_type_pos) or {}
 		return array_init.typ
 	}
 	// a = []
@@ -3618,7 +3618,7 @@ pub fn (mut c Checker) expr(node ast.Expr) table.Type {
 			expr_type_sym := c.table.get_type_symbol(node.expr_type)
 			type_sym := c.table.get_type_symbol(node.typ)
 			if expr_type_sym.kind == .sum_type {
-				c.ensure_type_exists(node.typ, node.pos) or { }
+				c.ensure_type_exists(node.typ, node.pos) or {}
 				if !c.table.sumtype_has_variant(node.expr_type, node.typ) {
 					c.error('cannot cast `$expr_type_sym.name` to `$type_sym.name`', node.pos)
 					// c.error('only $info.variants can be casted to `$typ`', node.pos)
@@ -3863,7 +3863,7 @@ pub fn (mut c Checker) cast_expr(mut node ast.CastExpr) table.Type {
 	from_type_sym := c.table.get_type_symbol(node.expr_type)
 	to_type_sym := c.table.get_type_symbol(node.typ) // type to be used as cast
 	if to_type_sym.language != .c {
-		c.ensure_type_exists(node.typ, node.pos) or { }
+		c.ensure_type_exists(node.typ, node.pos) or {}
 	}
 	expr_is_ptr := node.expr_type.is_ptr() || node.expr_type.idx() in table.pointer_type_idxs
 	if expr_is_ptr && to_type_sym.kind == .string && !node.in_prexpr {
@@ -5503,8 +5503,8 @@ pub fn (mut c Checker) map_init(mut node ast.MapInit) table.Type {
 	// `x := map[string]string` - set in parser
 	if node.typ != 0 {
 		info := c.table.get_type_symbol(node.typ).map_info()
-		c.ensure_type_exists(info.key_type, node.pos) or { }
+		c.ensure_type_exists(info.key_type, node.pos) or {}
-		c.ensure_type_exists(info.value_type, node.pos) or { }
+		c.ensure_type_exists(info.value_type, node.pos) or {}
 		node.key_type = info.key_type
 		node.value_type = info.value_type
 		return node.typ

vlib/v/fmt/fmt.v

@@ -850,7 +850,11 @@ pub fn (mut f Fmt) or_expr(node ast.OrExpr) {
 		.absent {}
 		.block {
 			if node.stmts.len == 0 {
-				f.write(' or { }')
+				f.write(' or {')
+				if node.pos.line_nr != node.pos.last_line {
+					f.writeln('')
+				}
+				f.write('}')
 				return
 			} else if node.stmts.len == 1 && stmt_is_single_line(node.stmts[0]) {
 				// the control stmts (return/break/continue...) print a newline inside them,

vlib/v/fmt/tests/or_keep.vv

@@ -1,3 +1,9 @@
+fn main() {
+	empty_or_block() or {}
+	empty_or_block() or {
+	}
+}
+
 fn fn_with_or() int {
 	fn_with_optional() or { return 10 }
 	return 20

vlib/v/live/executable/reloader.v

@@ -127,7 +127,7 @@ fn protected_load_lib(mut r live.LiveReloadInfo, new_lib_path string) {
 	elog(r, '> load_lib OK, new live_lib: $r.live_lib')
 	// removing the .so file from the filesystem after dlopen-ing
 	// it is safe, since it will still be mapped in memory
-	os.rm(new_lib_path) or { }
+	os.rm(new_lib_path) or {}
 }
 
 // NB: r.reloader() is executed in a new, independent thread

vlib/v/live/live_test.v

@@ -75,7 +75,7 @@ fn testsuite_begin() {
 	for f in [tmp_file, source_file, output_file, res_original_file, res_changed_file, res_another_file,
 		res_stop_file,
 	] {
-		os.rm(f) or { }
+		os.rm(f) or {}
 	}
 	atomic_write_source(live_program_source)
 }
@@ -105,7 +105,7 @@ fn testsuite_end() {
 	assert histogram['CHANGED'] + histogram['ANOTHER'] > 0
 	// assert histogram['END'] > 0
 	for tfile in cleanup_files {
-		os.rm(tfile) or { }
+		os.rm(tfile) or {}
 	}
 }
 

vlib/v/pref/pref.v

@@ -490,7 +490,7 @@ pub fn parse_args(known_external_commands []string, args []string) (&Preferences
 			//
 			if output_option.len != 0 {
 				res.vrun_elog('remove tmp exe file: $tmp_exe_file_path')
-				os.rm(tmp_exe_file_path) or { }
+				os.rm(tmp_exe_file_path) or {}
 			}
 			res.vrun_elog('remove tmp v file: $tmp_v_file_path')
 			os.rm(tmp_v_file_path) or { panic(err) }

vlib/v/table/cflags_test.v

@@ -54,7 +54,7 @@ fn test_parse_invalid_cflags() {
 }
 
 fn parse_valid_flag(mut t table.Table, flag string) {
-	t.parse_cflag(flag, module_name, cdefines) or { }
+	t.parse_cflag(flag, module_name, cdefines) or {}
 }
 
 fn assert_parse_invalid_flag(mut t table.Table, flag string) {

vlib/v/vcache/vcache_test.v

@@ -17,7 +17,7 @@ fn check_cache_entry_fpath_invariants(x string, extension string) {
 fn testsuite_begin() {
 	os.setenv('VCACHE', vcache_folder, true)
 	// eprintln('testsuite_begin, vcache_folder = $vcache_folder')
-	os.rmdir_all(vcache_folder) or { }
+	os.rmdir_all(vcache_folder) or {}
 	vcache.new_cache_manager([])
 	assert os.is_dir(vcache_folder)
 }
@@ -96,6 +96,6 @@ fn test_readme_exists_and_is_readable() {
 
 fn testsuite_end() {
 	os.chdir(os.wd_at_startup)
-	os.rmdir_all(vcache_folder) or { }
+	os.rmdir_all(vcache_folder) or {}
 	assert !os.is_dir(vcache_folder)
 }

vlib/vweb/request.v

@@ -35,7 +35,7 @@ fn parse_request(mut reader io.BufferedReader) ?http.Request {
 		n := length.int()
 		if n > 0 {
 			body = []byte{len: n}
-			reader.read(mut body) or { }
+			reader.read(mut body) or {}
 		}
 	}
 

vlib/vweb/tests/vweb_test.v

@@ -20,7 +20,7 @@ const (
 fn testsuite_begin() {
 	os.chdir(vroot)
 	if os.exists(serverexe) {
-		os.rm(serverexe) or { }
+		os.rm(serverexe) or {}
 	}
 }
 
@@ -260,7 +260,7 @@ fn simple_tcp_client(config SimpleTcpClientConfig) ?string {
 	client.set_read_timeout(tcp_r_timeout)
 	client.set_write_timeout(tcp_w_timeout)
 	defer {
-		client.close() or { }
+		client.close() or {}
 	}
 	message := 'GET $config.path HTTP/1.1
 Host: $config.host

vlib/vweb/vweb.v

@@ -169,7 +169,7 @@ pub fn (mut ctx Context) server_error(ecode int) Result {
 	if ctx.done {
 		return Result{}
 	}
-	send_string(mut ctx.conn, vweb.http_500) or { }
+	send_string(mut ctx.conn, vweb.http_500) or {}
 	return Result{}
 }
 
@@ -191,7 +191,7 @@ pub fn (mut ctx Context) not_found() Result {
 		return Result{}
 	}
 	ctx.done = true
-	send_string(mut ctx.conn, vweb.http_404) or { }
+	send_string(mut ctx.conn, vweb.http_404) or {}
 	return Result{}
 }
 
@@ -301,7 +301,7 @@ fn handle_conn<T>(mut conn net.TcpConn, mut app T) {
 	conn.set_read_timeout(30 * time.second)
 	conn.set_write_timeout(30 * time.second)
 	defer {
-		conn.close() or { }
+		conn.close() or {}
 	}
 	mut reader := io.new_buffered_reader(reader: io.make_reader(conn))
 	page_gen_start := time.ticks()
@@ -321,7 +321,7 @@ fn handle_conn<T>(mut conn net.TcpConn, mut app T) {
 		if 'multipart/form-data' in req.lheaders['content-type'].split('; ') {
 			boundary := req.lheaders['content-type'].split('; ').filter(it.starts_with('boundary='))
 			if boundary.len != 1 {
-				send_string(mut conn, vweb.http_400) or { }
+				send_string(mut conn, vweb.http_400) or {}
 				return
 			}
 			form, files := parse_multipart_form(req.data, boundary[0][9..])
@@ -400,7 +400,7 @@ fn handle_conn<T>(mut conn net.TcpConn, mut app T) {
 		}
 	}
 	// site not found
-	send_string(mut conn, vweb.http_404) or { }
+	send_string(mut conn, vweb.http_404) or {}
 }
 
 fn route_matches(url_words []string, route_words []string) ?[]string {
@@ -493,7 +493,7 @@ fn serve_static<T>(mut app T, url urllib.URL) bool {
 		return false
 	}
 	data := os.read_file(static_file) or {
-		send_string(mut app.conn, vweb.http_404) or { }
+		send_string(mut app.conn, vweb.http_404) or {}
 		return true
 	}
 	app.send_response_to_client(mime_type, data)

vlib/x/websocket/websocket_client.v

@@ -111,7 +111,7 @@ pub fn (mut ws Client) listen() ? {
 	defer {
 		ws.logger.info('Quit client listener, server($ws.is_server)...')
 		if ws.state == .open {
-			ws.close(1000, 'closed by client') or { }
+			ws.close(1000, 'closed by client') or {}
 		}
 	}
 	for ws.state == .open {
@@ -321,7 +321,7 @@ pub fn (mut ws Client) close(code int, message string) ? {
 		return error(err_msg)
 	}
 	defer {
-		ws.shutdown_socket() or { }
+		ws.shutdown_socket() or {}
 		ws.reset_state()
 	}
 	ws.set_state(.closing)

vlib/x/websocket/websocket_test.v

@@ -48,7 +48,7 @@ fn start_server(listen_port int) ? {
 	s.on_close(fn (mut ws websocket.Client, code int, reason string) ? {
 		// not used
 	})
-	s.listen() or { }
+	s.listen() or {}
 }
 
 // ws_test tests connect to the websocket server from websocket client