From ee3a93a4426bf7cea6fd877f9d85cd8f1f9ae9ff Mon Sep 17 00:00:00 2001
From: Rangi42 <remy.oukaour+rangi42@gmail.com>
Date: Fri, 9 Aug 2024 23:22:36 -0400
Subject: [PATCH] Test macro args `\0` and `\<0>`

---
 src/asm/lexer.cpp        | 3 ---
 test/asm/macro-arg-0.asm | 5 +++++
 test/asm/macro-arg-0.err | 5 +++++
 3 files changed, 10 insertions(+), 3 deletions(-)
 create mode 100644 test/asm/macro-arg-0.asm
 create mode 100644 test/asm/macro-arg-0.err

diff --git a/src/asm/lexer.cpp b/src/asm/lexer.cpp
index abd00874..0d958255 100644
--- a/src/asm/lexer.cpp
+++ b/src/asm/lexer.cpp
@@ -672,9 +672,6 @@ static std::shared_ptr<std::string> readMacroArg(char name) {
 			error("Macro argument '\\<%" PRIu32 ">' not defined\n", num);
 		}
 		return str;
-	} else if (name == '0') {
-		error("Invalid macro argument '\\0'\n");
-		return nullptr;
 	} else {
 		assume(name >= '1' && name <= '9');
 
diff --git a/test/asm/macro-arg-0.asm b/test/asm/macro-arg-0.asm
new file mode 100644
index 00000000..f4944cd7
--- /dev/null
+++ b/test/asm/macro-arg-0.asm
@@ -0,0 +1,5 @@
+MACRO m
+	def x = \0
+	def y = \<0> + 42
+ENDM
+	m hello, world
diff --git a/test/asm/macro-arg-0.err b/test/asm/macro-arg-0.err
new file mode 100644
index 00000000..136a5c8c
--- /dev/null
+++ b/test/asm/macro-arg-0.err
@@ -0,0 +1,5 @@
+error: macro-arg-0.asm(5) -> macro-arg-0.asm::m(2):
+    Begun line continuation, but encountered character '0'
+error: macro-arg-0.asm(5) -> macro-arg-0.asm::m(3):
+    Invalid bracketed macro argument '\<0>'
+error: Assembly aborted (2 errors)!