compiler/vlib: change `_ :=` to `_ =` and disable `_ :=`

compiler/fn.v

@@ -90,7 +90,7 @@ fn (p mut Parser) mark_var_changed(v Var) {
 }
 
 fn (p mut Parser) known_var(name string) bool {
-	_ := p.find_var(name) or {
+	_ = p.find_var(name) or {
 		return false
 	}	
 	return true

compiler/parser.v

@@ -1378,9 +1378,9 @@ fn (p mut Parser) var_decl() {
 	}
 	for i, name in names {
 		if name == '_' {
-			// if names.len == 1 {
-			// 	p.error('no new variables on left side of :=')
-			// }
+			if names.len == 1 {
+				p.error('no new variables on left side of :=')
+			}
 			continue
 		}
 		typ := types[i]

compiler/table.v

@@ -333,12 +333,12 @@ fn (t &Table) find_fn(name string) ?Fn {
 }
 
 fn (t &Table) known_fn(name string) bool {
-	_ := t.find_fn(name) or { return false }
+	_ = t.find_fn(name) or { return false }
 	return true
 }
 
 fn (t &Table) known_const(name string) bool {
-	_ := t.find_const(name) or { return false }
+	_ = t.find_const(name) or { return false }
 	return true
 }
 
@@ -404,7 +404,7 @@ fn (table mut Table) add_field(type_name, field_name, field_type string, is_mut
 }
 
 fn (t &Type) has_field(name string) bool {
-	_ := t.find_field(name) or { return false }
+	_ = t.find_field(name) or { return false }
 	return true
 }
 
@@ -422,7 +422,7 @@ fn (t &Type) find_field(name string) ?Var {
 }
 
 fn (table &Table) type_has_field(typ &Type, name string) bool {
-	_ := table.find_field(typ, name) or { return false }
+	_ = table.find_field(typ, name) or { return false }
 	return true
 }
 
@@ -465,12 +465,12 @@ fn (p mut Parser) add_method(type_name string, f Fn) {
 }
 
 fn (t &Type) has_method(name string) bool {
-	_ := t.find_method(name) or { return false }
+	_ = t.find_method(name) or { return false }
 	return true
 }
 
 fn (table &Table) type_has_method(typ &Type, name string) bool {
-	_ := table.find_method(typ, name) or { return false }
+	_ = table.find_method(typ, name) or { return false }
 	return true
 }
 

tools/gen_vc.v

@@ -117,7 +117,7 @@ fn main() {
 
 	flag_options := parse_flags(mut fp)
 
- 	_ := fp.finalize() or {
+ 	_ = fp.finalize() or {
  		eprintln(err)
  		println(fp.usage())
  		return

tools/vget.v

@@ -67,7 +67,7 @@ fn main() {
 		final_module_path := '$home_vmodules/' + mod.name.replace('.', '/')
 
 		println('Installing module "$name" from $mod.url to $final_module_path ...')
-		_ := os.exec('git clone --depth=1 $mod.url $final_module_path') or {
+		_ = os.exec('git clone --depth=1 $mod.url $final_module_path') or {
 			errors++
 			println('Could not install module "$name" to "$final_module_path" .')
 			println('Error details: $err')

vlib/builtin/array.v

@@ -19,7 +19,7 @@ pub:
 // Private function, used by V (`nums := []int`)
 fn new_array(mylen, cap, elm_size int) array {
 	a := 3
-	_ := a
+	_ = a
 	//println(a)
 	arr := array {
 		len: mylen

vlib/crypto/aes/block_generic.v

@@ -43,7 +43,7 @@ import (
 
 // Encrypt one block from src into dst, using the expanded key xk.
 fn encrypt_block_generic(xk []u32, dst, src []byte) {
-	mut _ := src[15] // early bounds check
+	_ = src[15] // early bounds check
 	mut s0 := binary.big_endian_u32(src.left(4))
 	mut s1 := binary.big_endian_u32(src.slice(4, 8))
 	mut s2 := binary.big_endian_u32(src.slice(8, 12))
@@ -95,7 +95,7 @@ fn encrypt_block_generic(xk []u32, dst, src []byte) {
 
 // Decrypt one block from src into dst, using the expanded key xk.
 fn decrypt_block_generic(xk []u32, dst, src []byte) {
-	mut _ := src[15] // early bounds check
+	_ = src[15] // early bounds check
 	mut s0 := binary.big_endian_u32(src.left(4))
 	mut s1 := binary.big_endian_u32(src.slice(4, 8))
 	mut s2 := binary.big_endian_u32(src.slice(8, 12))

vlib/crypto/rc4/rc4.v

@@ -68,7 +68,7 @@ pub fn (c mut Cipher) xor_key_stream(dst mut []byte, src []byte) {
 	}
 	mut i := c.i
 	mut j := c.j
-	_ := dst[src.len-1]
+	_ = dst[src.len-1]
 	*dst = dst.left(src.len) // eliminate bounds check from loop
 	for k, v in src {
 		i += byte(1)

vlib/encoding/binary/binary.v

@@ -8,26 +8,26 @@ module binary
 // Little Endian
 [inline]
 pub fn little_endian_endian_u16(b []byte) u16 {
-	_ := b[1] // bounds check
+	_ = b[1] // bounds check
 	return u16(b[0]) | u16(u16(b[1])<<u16(8))
 }
 
 [inline]
 pub fn little_endian_put_u16(b mut []byte, v u16) {
-	_ := b[1] // bounds check
+	_ = b[1] // bounds check
 	b[0] = byte(v)
 	b[1] = byte(v >> u16(8))
 }
 
 [inline]
 pub fn little_endian_u32(b []byte) u32 {
-	_ := b[3] // bounds check
+	_ = b[3] // bounds check
 	return u32(b[0]) | u32(u32(b[1])<<u32(8)) | u32(u32(b[2])<<u32(16)) | u32(u32(b[3])<<u32(24))
 }
 
 [inline]
 pub fn little_endian_put_u32(b mut []byte, v u32) {
-	_ := b[3] // bounds check
+	_ = b[3] // bounds check
 	b[0] = byte(v)
 	b[1] = byte(v >> u32(8))
 	b[2] = byte(v >> u32(16))
@@ -36,14 +36,14 @@ pub fn little_endian_put_u32(b mut []byte, v u32) {
 
 [inline]
 pub fn little_endian_u64(b []byte) u64 {
-	_ := b[7] // bounds check
+	_ = b[7] // bounds check
 	return u64(b[0]) | u64(u64(b[1])<<u64(8)) | u64(u64(b[2])<<u64(16)) | u64(u64(b[3])<<u64(24)) |
 		u64(u64(b[4])<<u64(32)) | u64(u64(b[5])<<u64(40)) | u64(u64(b[6])<<u64(48)) | u64(u64(b[7])<<u64(56))
 }
 
 [inline]
 pub fn little_endian_put_u64(b mut []byte, v u64) {
-	_ := b[7] // bounds check
+	_ = b[7] // bounds check
 	b[0] = byte(v)
 	b[1] = byte(v >> u64(8))
 	b[2] = byte(v >> u64(16))
@@ -57,26 +57,26 @@ pub fn little_endian_put_u64(b mut []byte, v u64) {
 // Big Endian
 [inline]
 pub fn big_endian_u16(b []byte) u16 {
-	_ := b[1] // bounds check
+	_ = b[1] // bounds check
 	return u16(b[1]) | u16(u16(b[0])<<u16(8))
 }
 
 [inline]
 pub fn big_endian_put_u16(b mut []byte, v u16) {
-	_ := b[1] // bounds check
+	_ = b[1] // bounds check
 	b[0] = byte(v >> u16(8))
 	b[1] = byte(v)
 }
 
 [inline]
 pub fn big_endian_u32(b []byte) u32 {
-	_ := b[3] // bounds check
+	_ = b[3] // bounds check
 	return u32(b[3]) | u32(u32(b[2])<<u32(8)) | u32(u32(b[1])<<u32(16)) | u32(u32(b[0])<<u32(24))
 }
 
 [inline]
 pub fn big_endian_put_u32(b mut []byte, v u32) {
-	_ := b[3] // bounds check
+	_ = b[3] // bounds check
 	b[0] = byte(v >> u32(24))
 	b[1] = byte(v >> u32(16))
 	b[2] = byte(v >> u32(8))
@@ -85,14 +85,14 @@ pub fn big_endian_put_u32(b mut []byte, v u32) {
 
 [inline]
 pub fn big_endian_u64(b []byte) u64 {
-	_ := b[7] // bounds check
+	_ = b[7] // bounds check
 	return u64(b[7]) | u64(u64(b[6])<<u64(8)) | u64(u64(b[5])<<u64(16)) | u64(u64(b[4])<<u64(24)) |
 		u64(u64(b[3])<<u64(32)) | u64(u64(b[2])<<u64(40)) | u64(u64(b[1])<<u64(48)) | u64(u64(b[0])<<u64(56))
 }
 
 [inline]
 pub fn big_endian_put_u64(b mut []byte, v u64) {
-	_ := b[7] // bounds check
+	_ = b[7] // bounds check
 	b[0] = byte(v >> u64(56))
 	b[1] = byte(v >> u64(48))
 	b[2] = byte(v >> u64(40))

vlib/net/socket_udp_test.v

@@ -4,7 +4,7 @@ fn start_socket_udp_server() {
 	bufsize := 1024
 	bytes := [1024]byte
 	s := net.socket_udp() or { panic(err) }
-	_ := s.bind( 9876 ) or { panic(err) }
+	_ = s.bind( 9876 ) or { panic(err) }
 	println('Waiting for udp packets:')
 	for {
 		res := s.crecv(bytes, bufsize)

vlib/net/urllib/urllib.v

@@ -527,7 +527,7 @@ fn _parse(rawurl string, via_request bool) ?URL {
 	// raw_path is a hint of the encoding of path. We don't want to set it if
 	// the default escaping of path is equivalent, to help make sure that people
 	// don't rely on it in general.
-	_ := url.set_path(rest) or {
+	_ = url.set_path(rest) or {
 		return error(err)
 	}
 	return url
@@ -812,7 +812,7 @@ pub fn (u &URL) str() string {
 // interpreted as a key set to an empty value.
 pub fn parse_query(query string) ?Values {
 	mut m := new_values()
-	_ := _parse_query(mut m, query) or {
+	_ = _parse_query(mut m, query) or {
 		return error(err)
 	}
 	return m
@@ -822,7 +822,7 @@ pub fn parse_query(query string) ?Values {
 // but any errors will be silent
 fn parse_query_silent(query string) Values {
 	mut m := new_values()
-	_ := _parse_query(mut m, query)
+	_ = _parse_query(mut m, query)
 	return m
 }
 

vlib/vweb/tmpl/tmpl.v

@@ -31,7 +31,7 @@ pub fn compile_template(path string) string {
 	s.writeln('module main import strings fn ${base}_view() string {   // this line will get removed becase only function body is embedded 
 mut sb := strings.new_builder(${lines.len * 30})
 header := \'$header\' 
-_ := header 
+_ = header 
 //footer := \'footer\' 
 ') 
 	s.writeln(STR_START)