From 4a73eb56eaa43800f80bdc8f3394c1243ba9abc7 Mon Sep 17 00:00:00 2001
From: Rangi <remy.oukaour+rangi42@gmail.com>
Date: Tue, 17 Aug 2021 18:43:25 -0400
Subject: [PATCH] Make `peek()` tail recursive instead of using `goto`

Compilation is identical with `gcc` or `clang`, -O3` or `-O2`
---
 src/asm/lexer.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/src/asm/lexer.c b/src/asm/lexer.c
index 4d80f4dd..6832ecfc 100644
--- a/src/asm/lexer.c
+++ b/src/asm/lexer.c
@@ -900,10 +900,7 @@ static char const *readInterpolation(size_t depth);
 
 static int peek(void)
 {
-	int c;
-
-restart:
-	c = peekInternal(0);
+	int c = peekInternal(0);
 
 	if (lexerState->macroArgScanDistance > 0)
 		return c;
@@ -924,7 +921,7 @@ restart:
 			 * expanded, so skip it and keep peeking.
 			 */
 			if (!str || !str[0])
-				goto restart;
+				return peek();
 
 			beginExpansion(str, c == '#', NULL);
 
@@ -945,7 +942,7 @@ restart:
 
 		if (str && str[0])
 			beginExpansion(str, false, str);
-		goto restart;
+		return peek();
 	}
 
 	return c;