From 3be7d393b675aaedd0047c5ec6b8343d45b15bfc Mon Sep 17 00:00:00 2001
From: Ben Wiederhake <BenWiederhake.GitHub@gmx.de>
Date: Sun, 14 May 2023 23:05:51 +0200
Subject: [PATCH] IPCCompiler: Nicer error message for invalid template
 spelling

---
 Meta/Lagom/Tools/CodeGenerators/IPCCompiler/main.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Meta/Lagom/Tools/CodeGenerators/IPCCompiler/main.cpp b/Meta/Lagom/Tools/CodeGenerators/IPCCompiler/main.cpp
index f03f5a571b..03dba12c79 100644
--- a/Meta/Lagom/Tools/CodeGenerators/IPCCompiler/main.cpp
+++ b/Meta/Lagom/Tools/CodeGenerators/IPCCompiler/main.cpp
@@ -135,6 +135,11 @@ Vector<Endpoint> parse(ByteBuffer const& file_contents)
             // FIXME: This is not entirely correct. Types can have spaces, for example `HashMap<int, DeprecatedString>`.
             //        Maybe we should use LibCpp::Parser for parsing types.
             parameter.type = lexer.consume_until([](char ch) { return isspace(ch); });
+            if (parameter.type.ends_with(',')) {
+                warnln("Parameter type '{}' looks invalid!", parameter.type);
+                warnln("Note that templates must not include spaces.");
+                VERIFY_NOT_REACHED();
+            }
             VERIFY(!lexer.is_eof());
             consume_whitespace();
             parameter.name = lexer.consume_until([](char ch) { return isspace(ch) || ch == ',' || ch == ')'; });