From ef26f277533b050eb4a69be7380935b6c1d231af Mon Sep 17 00:00:00 2001
From: Alexander Medvednikov <alexander@medvednikov.com>
Date: Mon, 27 Apr 2020 07:13:36 +0200
Subject: [PATCH] builtin: replace `isnil` calls for perfomance

---
 vlib/builtin/builtin.v | 4 ++--
 vlib/builtin/string.v  | 2 +-
 vlib/builtin/utf8.v    | 4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/vlib/builtin/builtin.v b/vlib/builtin/builtin.v
index d88e7d0684..12e62f05f6 100644
--- a/vlib/builtin/builtin.v
+++ b/vlib/builtin/builtin.v
@@ -50,7 +50,7 @@ pub fn panic(s string) {
 }
 
 pub fn eprintln(s string) {
-	if isnil(s.str) {
+	if s.str == 0 {
 		panic('eprintln(NIL)')
 	}
 	$if !windows {
@@ -65,7 +65,7 @@ pub fn eprintln(s string) {
 }
 
 pub fn eprint(s string) {
-	if isnil(s.str) {
+	if s.str == 0 {
 		panic('eprint(NIL)')
 	}
 	$if !windows {
diff --git a/vlib/builtin/string.v b/vlib/builtin/string.v
index bb76ed38a9..e00e7c150e 100644
--- a/vlib/builtin/string.v
+++ b/vlib/builtin/string.v
@@ -333,7 +333,7 @@ pub fn (s string) u64() u64 {
 
 // ==
 fn (s string) eq(a string) bool {
-	if isnil(s.str) {
+	if s.str == 0 {
 		// should never happen
 		panic('string.eq(): nil string')
 	}
diff --git a/vlib/builtin/utf8.v b/vlib/builtin/utf8.v
index 6b4e83b99c..9bb5dd7e39 100644
--- a/vlib/builtin/utf8.v
+++ b/vlib/builtin/utf8.v
@@ -116,7 +116,7 @@ pub fn (_str string) to_wide() &u16 {
 	$if windows {
 		num_chars := (C.MultiByteToWideChar(CP_UTF8, 0, _str.str, _str.len, 0, 0))
 		mut wstr := &u16(malloc((num_chars + 1) * 2)) // sizeof(wchar_t)
-		if !isnil(wstr) {
+		if wstr != 0 {
 			C.MultiByteToWideChar(CP_UTF8, 0, _str.str, _str.len, wstr, num_chars)
 			C.memset(&byte(wstr) + num_chars * 2, 0, 2)
 		}
@@ -139,7 +139,7 @@ pub fn string_from_wide2(_wstr &u16, len int) string {
 	$if windows {
 		num_chars := C.WideCharToMultiByte(CP_UTF8, 0, _wstr, len, 0, 0, 0, 0)
 		mut str_to := malloc(num_chars + 1)
-		if !isnil(str_to) {
+		if str_to != 0 {
 			C.WideCharToMultiByte(CP_UTF8, 0, _wstr, len, str_to, num_chars, 0, 0)
 			C.memset(str_to + num_chars, 0, 1)
 		}