From 9b839b3b7dc50e3f741d6a66c79ca85e20b18ba6 Mon Sep 17 00:00:00 2001
From: Swastik Baranwal <swstkbaranwal@gmail.com>
Date: Sat, 6 Feb 2021 16:29:20 +0530
Subject: [PATCH] cgen: fix gen of `>` operator overloading (#8600)

---
 vlib/v/gen/c/cgen.v                          |  8 +++++--
 vlib/v/tests/operator_overloading_cmp_test.v | 25 ++++++++++++++++++++
 2 files changed, 31 insertions(+), 2 deletions(-)
 create mode 100644 vlib/v/tests/operator_overloading_cmp_test.v

diff --git a/vlib/v/gen/c/cgen.v b/vlib/v/gen/c/cgen.v
index be17006b9a..d0c5e35bca 100644
--- a/vlib/v/gen/c/cgen.v
+++ b/vlib/v/gen/c/cgen.v
@@ -3378,14 +3378,18 @@ fn (mut g Gen) infix_expr(node ast.InfixExpr) {
 			g.write(')')
 		} else if node.op in [.ne, .gt, .ge, .le] && ((a && b && e) || c || d) {
 			typ := g.typ(if !d { left_type } else { (left_sym.info as table.Alias).parent_type })
-			g.write('!$typ')
+			if node.op == .gt {
+				g.write('$typ')
+			} else {
+				g.write('!$typ')
+			}
 			g.write('_')
 			if node.op == .ne {
 				g.write('_eq')
 			} else if node.op in [.ge, .le, .gt] {
 				g.write('_lt')
 			}
-			if node.op == .le {
+			if node.op in [.le, .gt] {
 				g.write('(')
 				g.expr(node.right)
 				g.write(', ')
diff --git a/vlib/v/tests/operator_overloading_cmp_test.v b/vlib/v/tests/operator_overloading_cmp_test.v
new file mode 100644
index 0000000000..1c94d45747
--- /dev/null
+++ b/vlib/v/tests/operator_overloading_cmp_test.v
@@ -0,0 +1,25 @@
+struct Foo {
+	i int
+}
+
+fn (a Foo) < (b Foo) bool {
+	return a.i < b.i
+}
+
+fn (a Foo) == (b Foo) bool {
+	return a.i == b.i
+}
+
+fn test_operator_overloading_cmp() {
+	a := Foo{i: 38}
+	b := Foo{i: 38}
+
+	assert (a > b) == false
+	assert (a < b) == false 
+	//// /// //
+	assert a >= b
+	assert a <= b
+	//// /// //
+	assert b >= a
+	assert b <= a
+}