fmt: make single-stmt `or` blocks single-line (#7126)

vlib/v/builder/builder.v

@@ -202,9 +202,7 @@ pub fn (b Builder) v_files_from_dir(dir string) []string {
 	} else if !os.is_dir(dir) {
 		verror("$dir isn't a directory!")
 	}
-	mut files := os.ls(dir) or {
-		panic(err)
-	}
+	mut files := os.ls(dir) or { panic(err) }
 	if b.pref.is_verbose {
 		println('v_files_from_dir ("$dir")')
 	}

vlib/v/builder/c.v

@@ -39,9 +39,7 @@ pub fn (mut b Builder) build_c(v_files []string, out_file string) {
 	b.pref.out_name_c = os.real_path(out_file)
 	b.info('build_c($out_file)')
 	output2 := b.gen_c(v_files)
-	mut f := os.create(out_file) or {
-		panic(err)
-	}
+	mut f := os.create(out_file) or { panic(err) }
 	f.writeln(output2)
 	f.close()
 	// os.write_file(out_file, b.gen_c(v_files))
@@ -58,9 +56,7 @@ pub fn (mut b Builder) compile_c() {
 		// println(files)
 	}
 	$if windows {
-		b.find_win_cc() or {
-			verror(no_compiler_error)
-		}
+		b.find_win_cc() or { verror(no_compiler_error) }
 		// TODO Probably extend this to other OS's?
 	}
 	// v1 compiler files

vlib/v/builder/cc.v

@@ -210,9 +210,7 @@ fn (mut v Builder) cc() {
 			}
 		}
 		// v.out_name_c may be on a different partition than v.out_name
-		os.mv_by_cp(v.out_name_c, v.pref.out_name) or {
-			panic(err)
-		}
+		os.mv_by_cp(v.out_name_c, v.pref.out_name) or { panic(err) }
 		return
 	}
 	// Cross compiling for Windows

vlib/v/builder/js.v

@@ -30,9 +30,7 @@ pub fn (mut b Builder) build_js(v_files []string, out_file string) {
 	b.out_name_js = out_file
 	b.info('build_js($out_file)')
 	output := b.gen_js(v_files)
-	mut f := os.create(out_file) or {
-		panic(err)
-	}
+	mut f := os.create(out_file) or { panic(err) }
 	f.writeln(output)
 	f.close()
 }

vlib/v/builder/msvc.v

@@ -166,12 +166,8 @@ fn find_msvc() ?MsvcResult {
 		processor_architecture := os.getenv('PROCESSOR_ARCHITECTURE')
 		vswhere_dir := if processor_architecture == 'x86' { '%ProgramFiles%' } else { '%ProgramFiles(x86)%' }
 		host_arch := if processor_architecture == 'x86' { 'X86' } else { 'X64' }
-		wk := find_windows_kit_root(host_arch) or {
-			return error('Unable to find windows sdk')
-		}
-		vs := find_vs(vswhere_dir, host_arch) or {
-			return error('Unable to find visual studio')
-		}
+		wk := find_windows_kit_root(host_arch) or { return error('Unable to find windows sdk') }
+		vs := find_vs(vswhere_dir, host_arch) or { return error('Unable to find visual studio') }
 		return MsvcResult{
 			full_cl_exe_path: os.real_path(vs.exe_path + os.path_separator + 'cl.exe')
 			exe_path: vs.exe_path

vlib/v/checker/checker.v

@@ -273,9 +273,7 @@ fn (mut c Checker) check_valid_snake_case(name string, identifier string, pos to
 }
 
 fn stripped_name(name string) string {
-	idx := name.last_index('.') or {
-		-1
-	}
+	idx := name.last_index('.') or { -1 }
 	return name[(idx + 1)..]
 }
 
@@ -348,9 +346,7 @@ pub fn (mut c Checker) struct_decl(decl ast.StructDecl) {
 	if decl.language == .v && !c.is_builtin_mod {
 		c.check_valid_pascal_case(decl.name, 'struct name', decl.pos)
 	}
-	mut struct_sym := c.table.find_type(decl.name) or {
-		table.TypeSymbol{}
-	}
+	mut struct_sym := c.table.find_type(decl.name) or { table.TypeSymbol{} }
 	if mut struct_sym.info is table.Struct {
 		for i, field in decl.fields {
 			if decl.language == .v && !field.is_embed {
@@ -2735,9 +2731,7 @@ fn (mut c Checker) hash_stmt(mut node ast.HashStmt) {
 			}
 		}
 		// println('adding flag "$flag"')
-		c.table.parse_cflag(flag, c.mod, c.pref.compile_defines_all) or {
-			c.error(err, node.pos)
-		}
+		c.table.parse_cflag(flag, c.mod, c.pref.compile_defines_all) or { c.error(err, node.pos) }
 	} else {
 		if node.kind != 'define' {
 			c.error('expected `#define`, `#flag`, `#include` or `#pkgconfig` not $node.val',
@@ -2847,9 +2841,7 @@ pub fn (mut c Checker) expr(node ast.Expr) table.Type {
 		}
 		ast.Assoc {
 			scope := c.file.scope.innermost(node.pos.pos)
-			v := scope.find_var(node.var_name) or {
-				panic(err)
-			}
+			v := scope.find_var(node.var_name) or { panic(err) }
 			for i, _ in node.fields {
 				c.expr(node.exprs[i])
 			}
@@ -3193,9 +3185,7 @@ fn (mut c Checker) at_expr(mut node ast.AtExpr) table.Type {
 					c.error('@VMOD_FILE can be used only in projects, that have v.mod file',
 						node.pos)
 				}
-				vmod_content := os.read_file(vmod_file_location.vmod_file) or {
-					''
-				}
+				vmod_content := os.read_file(vmod_file_location.vmod_file) or { '' }
 				$if windows {
 					c.vmod_file_content = vmod_content.replace('\r\n', '\n')
 				} $else {
@@ -3978,9 +3968,7 @@ pub fn (mut c Checker) if_expr(mut node ast.IfExpr) table.Type {
 			}
 			for st in branch.stmts {
 				// must not contain C statements
-				st.check_c_expr() or {
-					c.error('`if` expression branch has $err', st.position())
-				}
+				st.check_c_expr() or { c.error('`if` expression branch has $err', st.position()) }
 			}
 		}
 		// Also check for returns inside a comp.if's statements, even if its contents aren't parsed

vlib/v/doc/doc.v

@@ -327,9 +327,7 @@ pub fn (mut d Doc) generate() ? {
 	// get all files
 	d.base_path = if os.is_dir(d.base_path) { d.base_path } else { os.real_path(os.dir(d.base_path)) }
 	d.is_vlib = 'vlib' !in d.base_path
-	project_files := os.ls(d.base_path) or {
-		return error_with_code(err, 0)
-	}
+	project_files := os.ls(d.base_path) or { return error_with_code(err, 0) }
 	v_files := d.prefs.should_compile_filtered_files(d.base_path, project_files)
 	if v_files.len == 0 {
 		return error_with_code('vdoc: No valid V files were found.', 1)
@@ -345,14 +343,10 @@ pub fn (mut d Doc) generate() ? {
 	mut file_asts := []ast.File{}
 	for i, file_path in v_files {
 		if i == 0 {
-			d.parent_mod_name = get_parent_mod(d.base_path) or {
-				''
-			}
+			d.parent_mod_name = get_parent_mod(d.base_path) or { '' }
 		}
 		filename := os.base(file_path)
-		d.sources[filename] = util.read_file(file_path) or {
-			''
-		}
+		d.sources[filename] = util.read_file(file_path) or { '' }
 		file_asts <<
 			parser.parse_file(file_path, d.table, comments_mode, d.prefs, global_scope)
 	}

vlib/v/doc/module.v

@@ -26,9 +26,7 @@ fn get_parent_mod(input_dir string) ?string {
 	base_dir := os.dir(input_dir)
 	input_dir_name := os.file_name(base_dir)
 	prefs := new_vdoc_preferences()
-	fentries := os.ls(base_dir) or {
-		[]string{}
-	}
+	fentries := os.ls(base_dir) or { []string{} }
 	files := fentries.filter(!os.is_dir(it))
 	if 'v.mod' in files {
 		// the top level is reached, no point in climbing up further
@@ -36,9 +34,7 @@ fn get_parent_mod(input_dir string) ?string {
 	}
 	v_files := prefs.should_compile_filtered_files(base_dir, files)
 	if v_files.len == 0 {
-		parent_mod := get_parent_mod(base_dir) or {
-			return input_dir_name
-		}
+		parent_mod := get_parent_mod(base_dir) or { return input_dir_name }
 		if parent_mod.len > 0 {
 			return parent_mod + '.' + input_dir_name
 		}
@@ -52,9 +48,7 @@ fn get_parent_mod(input_dir string) ?string {
 	if file_ast.mod.name == 'main' {
 		return ''
 	}
-	parent_mod := get_parent_mod(base_dir) or {
-		return input_dir_name
-	}
+	parent_mod := get_parent_mod(base_dir) or { return input_dir_name }
 	if parent_mod.len > 0 {
 		return '${parent_mod}.$file_ast.mod.name'
 	}

vlib/v/doc/utils.v

@@ -62,9 +62,7 @@ pub fn get_comment_block_right_before(comments []ast.Comment) string {
 
 fn (mut d Doc) convert_pos(filename string, pos token.Position) DocPos {
 	if filename !in d.sources {
-		d.sources[filename] = util.read_file(os.join_path(d.base_path, filename)) or {
-			''
-		}
+		d.sources[filename] = util.read_file(os.join_path(d.base_path, filename)) or { '' }
 	}
 	source := d.sources[filename]
 	mut p := util.imax(0, util.imin(source.len - 1, pos.pos))

vlib/v/fmt/fmt.v

@@ -241,6 +241,18 @@ pub fn (mut f Fmt) stmts(stmts []ast.Stmt) {
 	f.indent--
 }
 
+pub fn (mut f Fmt) stmt_str(node ast.Stmt) string {
+	was_empty_line := f.empty_line
+	prev_line_len := f.line_len
+	pos := f.out.len
+	f.stmt(node)
+	str := f.out.after(pos).trim_space()
+	f.out.go_back_to(pos)
+	f.empty_line = was_empty_line
+	f.line_len = prev_line_len
+	return str
+}
+
 pub fn (mut f Fmt) stmt(node ast.Stmt) {
 	if f.is_debug {
 		eprintln('stmt: ${node.position():-42} | node: ${typeof(node):-20}')
@@ -1126,6 +1138,19 @@ pub fn (mut f Fmt) or_expr(or_block ast.OrExpr) {
 		.block {
 			if or_block.stmts.len == 0 {
 				f.write(' or { }')
+			} else if or_block.stmts.len == 1 {
+				// the control stmts (return/break/continue...) print a newline inside them,
+				// so, since this'll all be on one line, trim any possible whitespace
+				str := f.stmt_str(or_block.stmts[0]).trim_space()
+				single_line := ' or { $str }'
+				if single_line.len + f.line_len <= max_len.last() {
+					f.write(single_line)
+				} else {
+					// if the line would be too long, make it multiline
+					f.writeln(' or {')
+					f.stmts(or_block.stmts)
+					f.write('}')
+				}
 			} else {
 				f.writeln(' or {')
 				f.stmts(or_block.stmts)
@@ -1597,9 +1622,7 @@ pub fn (mut f Fmt) mark_module_as_used(name string) {
 	if !name.contains('.') {
 		return
 	}
-	pos := name.last_index('.') or {
-		0
-	}
+	pos := name.last_index('.') or { 0 }
 	mod := name[..pos]
 	if mod in f.used_imports {
 		return

vlib/v/fmt/fmt_keep_test.v

@@ -26,9 +26,7 @@ fn test_fmt() {
 	os.chdir(vroot)
 	basepath := os.join_path(vroot, '')
 	tmpfolder := os.temp_dir()
-	diff_cmd := util.find_working_diff_command() or {
-		''
-	}
+	diff_cmd := util.find_working_diff_command() or { '' }
 	mut fmt_bench := benchmark.new_benchmark()
 	keep_input_files := os.walk_ext('vlib/v/fmt/tests', '_keep.vv')
 	expected_input_files := os.walk_ext('vlib/v/fmt/tests', '_expected.vv')

vlib/v/fmt/fmt_test.v

@@ -23,9 +23,7 @@ fn test_fmt() {
 	}
 	vroot := os.dir(vexe)
 	tmpfolder := os.temp_dir()
-	diff_cmd := util.find_working_diff_command() or {
-		''
-	}
+	diff_cmd := util.find_working_diff_command() or { '' }
 	mut fmt_bench := benchmark.new_benchmark()
 	// Lookup the existing test _input.vv files:
 	input_files := os.walk_ext('$vroot/vlib/v/fmt/tests', '_input.vv')

vlib/v/fmt/fmt_vlib_test.v

@@ -26,9 +26,7 @@ fn test_vlib_fmt() {
 	}
 	vroot := os.dir(vexe)
 	tmpfolder := os.temp_dir()
-	diff_cmd := util.find_working_diff_command() or {
-		''
-	}
+	diff_cmd := util.find_working_diff_command() or { '' }
 	mut fmt_bench := benchmark.new_benchmark()
 	os.chdir(vroot)
 	input_files := os.walk_ext('vlib/v/', '.v').filter(!it.contains('/tests/'))

vlib/v/fmt/tests/or_expected.vv

@@ -1,13 +0,0 @@
-fn fn_with_or() int {
-	fn_with_optional() or {
-		return 10
-	}
-	return 20
-}
-
-fn (f Foo) method_with_or() int {
-	f.fn_with_optional() or {
-		return 10
-	}
-	return 20
-}

vlib/v/fmt/tests/or_keep.vv

@@ -1,5 +1,5 @@
 fn fn_with_or() int {
-	fn_with_optional() or {	return 10 }
+	fn_with_optional() or { return 10 }
 	return 20
 }
 

vlib/v/fmt/tests/void_optional_keep.vv

@@ -3,7 +3,5 @@ fn tt() ? {
 }
 
 fn main() {
-	tt() or {
-		panic('$err')
-	}
+	tt() or { panic('$err') }
 }

vlib/v/gen/cgen_test.v

@@ -18,16 +18,12 @@ fn test_c_files() {
 	vroot := os.dir(vexe)
 	for i in 1 .. (nr_tests + 1) {
 		path := '$vroot/vlib/v/gen/tests/${i}.vv'
-		ctext := os.read_file('$vroot/vlib/v/gen/tests/${i}.c') or {
-			panic(err)
-		}
+		ctext := os.read_file('$vroot/vlib/v/gen/tests/${i}.c') or { panic(err) }
 		mut b := builder.new_builder(pref.Preferences{})
 		b.module_search_paths = ['$vroot/vlib/v/gen/tests/']
 		mut res := b.gen_c([path]).after('#endbuiltin')
 		if res.contains('string _STR') {
-			pos := res.index('string _STR') or {
-				-1
-			}
+			pos := res.index('string _STR') or { -1 }
 			end := res.index_after('endof _STR_TMP', pos)
 			res = res[..pos] + res[end + 15..]
 		}

vlib/v/gen/comptime.v

@@ -38,9 +38,7 @@ fn (mut g Gen) comptime_call(node ast.ComptimeCall) {
 	result_type := g.table.find_type_idx('vweb.Result') // TODO not just vweb
 	if node.method_name == 'method' {
 		// `app.$method()`
-		m := node.sym.find_method(g.comp_for_method) or {
-			return
-		}
+		m := node.sym.find_method(g.comp_for_method) or { return }
 		/*
 		vals := m.attrs[0].split('/')
 		args := vals.filter(it.starts_with(':')).map(it[1..])

vlib/v/gen/x64/elf.v

@@ -99,9 +99,7 @@ pub fn (mut g Gen) generate_elf_footer() {
 	// -5 is for "e8 00 00 00 00"
 	g.write32_at(g.code_start_pos + 1, int(g.main_fn_addr - g.code_start_pos) - 5)
 	// Create the binary
-	mut f := os.create(g.out_name) or {
-		panic(err)
-	}
+	mut f := os.create(g.out_name) or { panic(err) }
 	os.chmod(g.out_name, 0o775) // make it an executable
 	f.write_bytes(g.buf.data, g.buf.len)
 	f.close()

vlib/v/parser/parser.v

@@ -165,9 +165,7 @@ pub fn parse_vet_file(path string, table_ &table.Table, pref &pref.Preferences)
 		global_scope: global_scope
 	}
 	if p.scanner.text.contains('\n  ') {
-		source_lines := os.read_lines(path) or {
-			[]string{}
-		}
+		source_lines := os.read_lines(path) or { []string{} }
 		for lnumber, line in source_lines {
 			if line.starts_with('  ') {
 				p.vet_error('Looks like you are using spaces for indentation.', lnumber)

vlib/v/pref/pref.v

@@ -340,9 +340,7 @@ pub fn parse_args(args []string) (&Preferences, string) {
 			'-b' {
 				sbackend := cmdline.option(current_args, '-b', 'c')
 				res.build_options << '$arg $sbackend'
-				b := backend_from_string(sbackend) or {
-					continue
-				}
+				b := backend_from_string(sbackend) or { continue }
 				res.backend = b
 				i++
 			}

vlib/v/table/cflags.v

@@ -31,9 +31,7 @@ pub fn (mut table Table) parse_cflag(cflg string, mod string, ctimedefines []str
 		if !flag.starts_with(os_override) {
 			continue
 		}
-		pos := flag.index(' ') or {
-			return none
-		}
+		pos := flag.index(' ') or { return none }
 		fos = flag[..pos].trim_space()
 		flag = flag[pos..].trim_space()
 	}
@@ -50,9 +48,7 @@ pub fn (mut table Table) parse_cflag(cflg string, mod string, ctimedefines []str
 				}
 			}
 		}
-		mut index := flag.index(' -') or {
-			-1
-		}
+		mut index := flag.index(' -') or { -1 }
 		for index > -1 {
 			mut has_next := false
 			for f in allowed_flags {

vlib/v/table/cflags_test.v

@@ -58,9 +58,7 @@ fn parse_valid_flag(mut t table.Table, flag string) {
 }
 
 fn assert_parse_invalid_flag(mut t table.Table, flag string) {
-	t.parse_cflag(flag, module_name, cdefines) or {
-		return
-	}
+	t.parse_cflag(flag, module_name, cdefines) or { return }
 	assert false
 }
 

vlib/v/table/table.v

@@ -153,9 +153,7 @@ pub fn (t &Table) find_fn(name string) ?Fn {
 }
 
 pub fn (t &Table) known_fn(name string) bool {
-	t.find_fn(name) or {
-		return false
-	}
+	t.find_fn(name) or { return false }
 	return true
 }
 
@@ -272,9 +270,7 @@ pub fn (t &Table) struct_find_field(s &TypeSymbol, name string) ?Field {
 			if field := ts.info.find_field(name) {
 				return field
 			}
-			field := t.register_aggregate_field(mut ts, name) or {
-				return error(err)
-			}
+			field := t.register_aggregate_field(mut ts, name) or { return error(err) }
 			return field
 		}
 		if ts.parent_idx == 0 {
@@ -400,9 +396,7 @@ pub fn (mut t Table) register_type_symbol(typ TypeSymbol) int {
 }
 
 pub fn (t &Table) known_type(name string) bool {
-	t.find_type(name) or {
-		return false
-	}
+	t.find_type(name) or { return false }
 	return true
 }
 

vlib/v/table/types.v

@@ -1016,9 +1016,7 @@ pub fn (t &Table) fn_signature(func &Fn, opts FnSignatureOpts) string {
 }
 
 pub fn (t &TypeSymbol) has_method(name string) bool {
-	t.find_method(name) or {
-		return false
-	}
+	t.find_method(name) or { return false }
 	return true
 }
 

vlib/v/util/diff.v

@@ -22,9 +22,7 @@ pub fn find_working_diff_command() ?string {
 			}
 			continue
 		}
-		p := os.exec('$diffcmd --version') or {
-			continue
-		}
+		p := os.exec('$diffcmd --version') or { continue }
 		if p.exit_code == 127 && diffcmd == env_difftool {
 			// user setup is wonky, fix it
 			return error('could not find specified VDIFF_TOOL $diffcmd')
@@ -43,9 +41,7 @@ pub fn find_working_diff_command() ?string {
 
 // determine if the FileMerge opendiff tool is available
 fn opendiff_exists() bool {
-	o := os.exec('opendiff') or {
-		return false
-	}
+	o := os.exec('opendiff') or { return false }
 	if o.exit_code == 1 { // failed (expected), but found (i.e. not 127)
 		if o.output.contains('too few arguments') { // got some exptected output
 			return true
@@ -57,9 +53,7 @@ fn opendiff_exists() bool {
 pub fn color_compare_files(diff_cmd string, file1 string, file2 string) string {
 	if diff_cmd != '' {
 		full_cmd := '$diff_cmd --minimal --text --unified=2  --show-function-line="fn " "$file1" "$file2" '
-		x := os.exec(full_cmd) or {
-			return 'comparison command: `$full_cmd` failed'
-		}
+		x := os.exec(full_cmd) or { return 'comparison command: `$full_cmd` failed' }
 		return x.output.trim_right('\r\n')
 	}
 	return ''

vlib/v/util/errors.v

@@ -93,9 +93,7 @@ pub fn formatted_error(kind string, omsg string, filepath string, pos token.Posi
 pub fn filepath_pos_to_source_and_column(filepath string, pos token.Position) (string, int) {
 	// TODO: optimize this; may be use a cache.
 	// The column should not be so computationally hard to get.
-	source := read_file(filepath) or {
-		''
-	}
+	source := read_file(filepath) or { '' }
 	mut p := imax(0, imin(source.len - 1, pos.pos))
 	if source.len > 0 {
 		for ; p >= 0; p-- {

vlib/v/util/util.v

@@ -71,9 +71,7 @@ pub fn githash(should_get_from_filesystem bool) string {
 				break
 			}
 			// 'ref: refs/heads/master' ... the current branch name
-			head_content := os.read_file(git_head_file) or {
-				break
-			}
+			head_content := os.read_file(git_head_file) or { break }
 			mut current_branch_hash := head_content
 			if head_content.starts_with('ref: ') {
 				gcbranch_rel_path := head_content.replace('ref: ', '').trim_space()
@@ -83,9 +81,7 @@ pub fn githash(should_get_from_filesystem bool) string {
 					break
 				}
 				// get the full commit hash contained in the ref heads file
-				branch_hash := os.read_file(gcbranch_file) or {
-					break
-				}
+				branch_hash := os.read_file(gcbranch_file) or { break }
 				current_branch_hash = branch_hash
 			}
 			desired_hash_length := 7
@@ -144,18 +140,14 @@ pub fn launch_tool(is_verbose bool, tool_name string, args []string) {
 	if should_compile {
 		emodules := external_module_dependencies_for_tool[tool_name]
 		for emodule in emodules {
-			check_module_is_installed(emodule, is_verbose) or {
-				panic(err)
-			}
+			check_module_is_installed(emodule, is_verbose) or { panic(err) }
 		}
 		mut compilation_command := '"$vexe" '
 		compilation_command += '"$tool_source"'
 		if is_verbose {
 			println('Compiling $tool_name with: "$compilation_command"')
 		}
-		tool_compilation := os.exec(compilation_command) or {
-			panic(err)
-		}
+		tool_compilation := os.exec(compilation_command) or { panic(err) }
 		if tool_compilation.exit_code != 0 {
 			eprintln('cannot compile `$tool_source`: \n$tool_compilation.output')
 			exit(1)
@@ -227,9 +219,7 @@ pub fn path_of_executable(path string) string {
 }
 
 pub fn read_file(file_path string) ?string {
-	raw_text := os.read_file(file_path) or {
-		return error('failed to open $file_path')
-	}
+	raw_text := os.read_file(file_path) or { return error('failed to open $file_path') }
 	return skip_bom(raw_text)
 }
 
@@ -356,9 +346,7 @@ pub fn ensure_modules_for_all_tools_are_installed(is_verbose bool) {
 			eprintln('Installing modules for tool: $tool_name ...')
 		}
 		for emodule in tool_modules {
-			check_module_is_installed(emodule, is_verbose) or {
-				panic(err)
-			}
+			check_module_is_installed(emodule, is_verbose) or { panic(err) }
 		}
 	}
 }

vlib/v/vet/vet_test.v

@@ -13,9 +13,7 @@ fn test_vet() {
 }
 
 fn get_tests_in_dir(dir string) []string {
-	files := os.ls(dir) or {
-		panic(err)
-	}
+	files := os.ls(dir) or { panic(err) }
 	mut tests := files.filter(it.ends_with('.vv'))
 	tests.sort()
 	return tests
@@ -27,12 +25,8 @@ fn check_path(vexe string, dir string, tests []string) int {
 	for path in paths {
 		program := path
 		print(path + ' ')
-		res := os.exec('$vexe vet $program') or {
-			panic(err)
-		}
-		mut expected := os.read_file(program.replace('.vv', '') + '.out') or {
-			panic(err)
-		}
+		res := os.exec('$vexe vet $program') or { panic(err) }
+		mut expected := os.read_file(program.replace('.vv', '') + '.out') or { panic(err) }
 		expected = clean_line_endings(expected)
 		found := clean_line_endings(res.output)
 		if expected != found {

vlib/v/vmod/parser.v

@@ -52,9 +52,7 @@ pub fn from_file(vmod_path string) ?Manifest {
 	if !os.exists(vmod_path) {
 		return error('v.mod: v.mod file not found.')
 	}
-	contents := os.read_file(vmod_path) or {
-		panic('v.mod: cannot parse v.mod')
-	}
+	contents := os.read_file(vmod_path) or { panic('v.mod: cannot parse v.mod') }
 	return decode(contents)
 }