From 38d3239b50d168eeafd27df575137a6f1a5dad2b Mon Sep 17 00:00:00 2001
From: Alexander Medvednikov <alexander@vlang.io>
Date: Wed, 19 Jan 2022 15:26:24 +0300
Subject: [PATCH] checker: c2v fixes

---
 vlib/builtin/cfns.c.v    | 3 +++
 vlib/v/checker/checker.v | 3 ++-
 vlib/v/checker/if.v      | 2 +-
 vlib/v/checker/match.v   | 2 +-
 4 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/vlib/builtin/cfns.c.v b/vlib/builtin/cfns.c.v
index c2bb9a31f3..8cb1b96966 100644
--- a/vlib/builtin/cfns.c.v
+++ b/vlib/builtin/cfns.c.v
@@ -171,6 +171,9 @@ fn C.tolower(c int) int
 [trusted]
 fn C.toupper(c int) int
 
+[trusted]
+fn C.strchr(s &char, c int) &char
+
 [trusted]
 fn C.getchar() int
 
diff --git a/vlib/v/checker/checker.v b/vlib/v/checker/checker.v
index 6214ea0c9f..0f4e4c5a2e 100644
--- a/vlib/v/checker/checker.v
+++ b/vlib/v/checker/checker.v
@@ -2704,7 +2704,8 @@ pub fn (mut c Checker) cast_expr(mut node ast.CastExpr) ast.Type {
 				}
 			}
 		}
-	} else if to_type == ast.bool_type && from_type != ast.bool_type && !c.inside_unsafe {
+	} else if to_type == ast.bool_type && from_type != ast.bool_type && !c.inside_unsafe
+		&& !c.pref.translated {
 		c.error('cannot cast to bool - use e.g. `some_int != 0` instead', node.pos)
 	} else if from_type == ast.none_type && !to_type.has_flag(.optional) {
 		type_name := c.table.type_to_str(to_type)
diff --git a/vlib/v/checker/if.v b/vlib/v/checker/if.v
index 02ef3e4195..8b943b63a5 100644
--- a/vlib/v/checker/if.v
+++ b/vlib/v/checker/if.v
@@ -28,7 +28,7 @@ pub fn (mut c Checker) if_expr(mut node ast.IfExpr) ast.Type {
 	mut is_comptime_type_is_expr := false // if `$if T is string`
 	for i in 0 .. node.branches.len {
 		mut branch := node.branches[i]
-		if branch.cond is ast.ParExpr {
+		if branch.cond is ast.ParExpr && !c.pref.translated {
 			c.error('unnecessary `()` in `$if_kind` condition, use `$if_kind expr {` instead of `$if_kind (expr) {`.',
 				branch.pos)
 		}
diff --git a/vlib/v/checker/match.v b/vlib/v/checker/match.v
index a9b60b979d..b6df67fdad 100644
--- a/vlib/v/checker/match.v
+++ b/vlib/v/checker/match.v
@@ -8,7 +8,7 @@ import strings
 pub fn (mut c Checker) match_expr(mut node ast.MatchExpr) ast.Type {
 	node.is_expr = c.expected_type != ast.void_type
 	node.expected_type = c.expected_type
-	if node.cond is ast.ParExpr {
+	if node.cond is ast.ParExpr && !c.pref.translated {
 		c.error('unnecessary `()` in `match` condition, use `match expr {` instead of `match (expr) {`.',
 			node.cond.pos)
 	}