From 8f08795689f6dc95f73ebb5aec4933e96d003670 Mon Sep 17 00:00:00 2001
From: StunxFS <56417208+StunxFS@users.noreply.github.com>
Date: Thu, 11 Mar 2021 16:43:04 -0400
Subject: [PATCH] checker: warn/error about empty const blocks (#9252)

---
 vlib/v/checker/checker.v | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/vlib/v/checker/checker.v b/vlib/v/checker/checker.v
index 9425ab0bb4..e98941e368 100644
--- a/vlib/v/checker/checker.v
+++ b/vlib/v/checker/checker.v
@@ -2442,6 +2442,9 @@ pub fn (mut c Checker) return_stmt(mut return_stmt ast.Return) {
 pub fn (mut c Checker) const_decl(mut node ast.ConstDecl) {
 	mut field_names := []string{}
 	mut field_order := []int{}
+	if node.fields.len == 0 {
+		c.warn('const block must have at least 1 declaration', node.pos)
+	}
 	for i, field in node.fields {
 		// TODO Check const name once the syntax is decided
 		if field.name in c.const_names {