From 4715fb67c163787079fcb6698a92eae5b0adea12 Mon Sep 17 00:00:00 2001
From: Alexander Medvednikov <alexander@vlang.io>
Date: Tue, 25 Jan 2022 20:15:45 +0300
Subject: [PATCH] checker: c2v fixes for enums and pointer to numbers

---
 vlib/builtin/cfns.c.v        |  6 ++++++
 vlib/v/checker/check_types.v | 15 +++++++++++++--
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/vlib/builtin/cfns.c.v b/vlib/builtin/cfns.c.v
index b1295cbb3a..a2d686511d 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.isspace(c int) int
+
 [trusted]
 fn C.strchr(s &char, c int) &char
 
@@ -186,6 +189,9 @@ fn C.strncasecmp(s &char, s2 &char, n int) int
 [trusted]
 fn C.strcasecmp(s &char, s2 &char) int
 
+[trusted]
+fn C.strncmp(s &char, s2 &char, n int) int
+
 [trusted]
 fn C.strerror(int) &char
 
diff --git a/vlib/v/checker/check_types.v b/vlib/v/checker/check_types.v
index 55587d5df2..a5b979b139 100644
--- a/vlib/v/checker/check_types.v
+++ b/vlib/v/checker/check_types.v
@@ -11,6 +11,8 @@ pub fn (mut c Checker) check_types(got ast.Type, expected ast.Type) bool {
 	if got == expected {
 		return true
 	}
+	got_is_ptr := got.is_ptr()
+	exp_is_ptr := expected.is_ptr()
 	if c.pref.translated {
 		if expected == ast.byteptr_type {
 			return true
@@ -40,9 +42,18 @@ pub fn (mut c Checker) check_types(got ast.Type, expected ast.Type) bool {
 				return true
 			}
 		}
+		if expected_sym.kind == .enum_ && got_sym.is_number() {
+			// Allow enums as numbers
+			return true
+		}
+		if got_is_ptr && exp_is_ptr {
+			// deref_sym := c.table.sym(expected.deref()) // set_nr_muls(0))
+			if expected_sym.is_number() && got_sym.is_number() {
+				// Allow `&&u8` used as `&&int` etc
+				return true
+			}
+		}
 	}
-	got_is_ptr := got.is_ptr()
-	exp_is_ptr := expected.is_ptr()
 	if got_is_ptr && exp_is_ptr {
 		if got.nr_muls() != expected.nr_muls() {
 			return false