From d5db17f715af065ea682fd5c1bd5dbfb3bbcb895 Mon Sep 17 00:00:00 2001
From: Masaaki Goshima <goccy54@gmail.com>
Date: Sun, 15 Dec 2024 00:56:19 +0900
Subject: [PATCH] fix parsing of tab indent in single quote

---
 scanner/scanner.go | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/scanner/scanner.go b/scanner/scanner.go
index 13d2fff..fb068ed 100644
--- a/scanner/scanner.go
+++ b/scanner/scanner.go
@@ -250,7 +250,17 @@ func (s *Scanner) scanSingleQuote(ctx *Context) (*token.Token, error) {
 				}
 			}
 			continue
-		} else if isFirstLineChar && (c == ' ' || c == '\t') {
+		} else if isFirstLineChar && c == ' ' {
+			continue
+		} else if isFirstLineChar && c == '\t' {
+			if s.lastDelimColumn >= s.column {
+				return nil, ErrInvalidToken(
+					token.Invalid(
+						"tab character cannot be used for indentation in single-quoted text",
+						string(ctx.obuf), s.pos(),
+					),
+				)
+			}
 			continue
 		} else if c != '\'' {
 			value = append(value, c)