array: make ".contains()" private, use "in" everywhere

compiler/fn.v

@@ -423,7 +423,7 @@ fn (p mut Parser) fn_decl() {
 	}
 	if f.name == 'main' || f.name == 'WinMain' {
 		p.genln('init_consts();')
-		if p.table.imports.contains('os') {
+		if 'os' in p.table.imports {
 			if f.name == 'main' {
 				p.genln('os__args = os__init_os_args(argc, argv);')
 			}
@@ -604,6 +604,9 @@ fn (p mut Parser) async_fn_call(f Fn, method_ph int, receiver_var, receiver_type
 
 fn (p mut Parser) fn_call(f Fn, method_ph int, receiver_var, receiver_type string) {
 	if !f.is_public &&  !f.is_c && !p.pref.is_test && !f.is_interface && f.mod != p.mod  {
+		if f.name == 'contains' {
+			println('use `value in numbers` instead of `numbers.contains(value)`')
+		}
 		p.error('function `$f.name` is private')
 	}
 	p.calling_c = f.is_c

compiler/main.v

@@ -232,10 +232,11 @@ fn (v mut V) compile() {
 		
 	v.generate_hotcode_reloading_declarations()
 
-	imports_json := v.table.imports.contains('json')
+	imports_json := 'json' in v.table.imports
 	// TODO remove global UI hack
-	if v.os == .mac && ((v.pref.build_mode == .embed_vlib && v.table.imports.contains('ui')) ||
-	(v.pref.build_mode == .build_module && v.dir.contains('/ui'))) {
+	if v.os == .mac && ((v.pref.build_mode == .embed_vlib && 'ui' in 
+		v.table.imports) || (v.pref.build_mode == .build_module && 
+		v.dir.contains('/ui'))) {
 		cgen.genln('id defaultFont = 0; // main.v')
 	}
 	// We need the cjson header for all the json decoding user will do in default mode
@@ -250,13 +251,13 @@ fn (v mut V) compile() {
 		// TODO
 		//cgen.genln('i64 total_m = 0; // For counting total RAM allocated')
 		cgen.genln('int g_test_ok = 1; ')
-		if v.table.imports.contains('json') {
+		if 'json' in v.table.imports {
 			cgen.genln('
 #define js_get(object, key) cJSON_GetObjectItemCaseSensitive((object), (key))
 ')
 		}
 	}
-	if os.args.contains('-debug_alloc') {
+	if '-debug_alloc' in os.args {
 		cgen.genln('#define DEBUG_ALLOC 1')
 	}
 	cgen.genln('/*================================== FNS =================================*/')
@@ -648,7 +649,7 @@ fn new_v(args[]string) &V {
 	mut out_name := get_arg(joined_args, 'o', 'a.out')
 
 	mut dir := args.last()
-	if args.contains('run') {
+	if 'run' in args {
 		dir = get_all_after(joined_args, 'run', '')
 	}
 	if dir.ends_with('/') {
@@ -685,7 +686,7 @@ fn new_v(args[]string) &V {
 */
 	}
 	// TODO embed_vlib is temporarily the default mode. It's much slower.
-	else if !args.contains('-embed_vlib') {
+	else if !('-embed_vlib' in args) {
 		build_mode = .embed_vlib
 	}
 	//
@@ -784,24 +785,24 @@ fn new_v(args[]string) &V {
 	rdir := os.realpath( dir )
 	rdir_name := os.filename( rdir )
 
-	obfuscate := args.contains('-obf')
-	is_repl:=args.contains('-repl')
+	obfuscate := '-obf' in args
+	is_repl := '-repl' in args
 	pref := &Preferences {
 		is_test: is_test
 		is_script: is_script
-		is_so: args.contains('-shared')
-		is_prod: args.contains('-prod')
-		is_verbose: args.contains('-verbose')
-		is_debuggable: args.contains('-g') // -debuggable implys debug
-		is_debug: args.contains('-debug') || args.contains('-g')
+		is_so: '-shared' in args
+		is_prod: '-prod' in args
+		is_verbose: '-verbose' in args
+		is_debuggable: '-g' in args
+		is_debug: '-debug' in args || '-g' in args
 		obfuscate: obfuscate
-		is_prof: args.contains('-prof')
-		is_live: args.contains('-live')
-		sanitize: args.contains('-sanitize')
-		nofmt: args.contains('-nofmt')
-		show_c_cmd: args.contains('-show_c_cmd')
-		translated: args.contains('translated')
-		is_run: args.contains('run')
+		is_prof: '-prof' in args
+		is_live: '-live' in args
+		sanitize: '-sanitize' in args
+		nofmt: '-nofmt' in args
+		show_c_cmd: '-show_c_cmd' in args
+		translated: 'translated' in args
+		is_run: 'run' in args
 		is_repl: is_repl
 		build_mode: build_mode
 		cflags: cflags

compiler/parser.v

@@ -176,7 +176,7 @@ fn (p mut Parser) parse(pass Pass) {
 		for p.tok == .key_import && p.peek() != .key_const {
 			p.imports()
 		}
-		if p.table.imports.contains('builtin') {
+		if 'builtin' in p.table.imports {
 			p.error('module `builtin` cannot be imported')
 		}
 		// save file import table
@@ -365,7 +365,7 @@ fn (p mut Parser) import_statement() {
 	// add import to file scope import table
 	p.import_table.register_alias(mod_alias, mod)
 	// Make sure there are no duplicate imports
-	if p.table.imports.contains(mod) {
+	if mod in p.table.imports {
 		return
 	}
 	p.log('adding import $mod')
@@ -2888,7 +2888,7 @@ fn (p mut Parser) struct_init(typ string, is_c_struct_init bool) string {
 			if !p.first_pass() && !t.has_field(field) {
 				p.error('`$t.name` has no field `$field`')
 			}
-			if inited_fields.contains(field) {
+			if field in inited_fields {
 				p.error('already initialized field `$field` in `$t.name`')
 			}
 			f := t.find_field(field)
@@ -2914,7 +2914,7 @@ fn (p mut Parser) struct_init(typ string, is_c_struct_init bool) string {
 		for i, field in t.fields {
 			// println('### field.name')
 			// Skip if this field has already been assigned to
-			if inited_fields.contains(field.name) {
+			if field.name in inited_fields {
 				continue
 			}
 			field_typ := field.typ

compiler/table.v

@@ -245,7 +245,7 @@ fn new_table(obfuscate bool) &Table {
 
 // If `name` is a reserved C keyword, returns `v_name` instead.
 fn (t mut Table) var_cgen_name(name string) string {
-	if CReserved.contains(name) {
+	if name in CReserved {
 		return 'v_$name'
 	}
 	else {
@@ -254,7 +254,7 @@ fn (t mut Table) var_cgen_name(name string) string {
 }
 
 fn (t mut Table) register_module(mod string) {
-	if t.modules.contains(mod) {
+	if mod in t.modules {
 		return
 	}
 	t.modules << mod
@@ -710,7 +710,7 @@ fn (table mut Table) cgen_name(f &Fn) string {
 	// Avoid name conflicts (with things like abs(), print() etc).
 	// Generate b_abs(), b_print()
 	// TODO duplicate functionality
-	if f.mod == 'builtin' && CReserved.contains(f.name) {
+	if f.mod == 'builtin' && f.name in CReserved {
 		return 'v_$name'
 	}
 	// Obfuscate but skip certain names

vlib/builtin/string.v

@@ -529,7 +529,7 @@ pub fn (s string) find_between(start, end string) string {
 }
 
 // TODO generic
-pub fn (ar []string) contains(val string) bool {
+fn (ar []string) contains(val string) bool {
 	for s in ar {
 		if s == val {
 			return true
@@ -539,7 +539,7 @@ pub fn (ar []string) contains(val string) bool {
 }
 
 // TODO generic
-pub fn (ar []int) contains(val int) bool {
+fn (ar []int) contains(val int) bool {
 	for i, s in ar {
 		if s == val {
 			return true