From 437006101b11c066f36ac2dbf563dac95fcb5d14 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <293473+sandersn@users.noreply.github.com>
Date: Tue, 10 Dec 2024 10:41:39 -0800
Subject: [PATCH 1/3] Shebang error parsing: compatibility with tsc

In tsc, `#!` anywhere except pos=0 in a file gives an error and increments
past `#`. In tsgo, it was incrementing past `#!`. tsc's behaviour seems
bad, but not bad enough to differ from, especially since the parse tree
will be wrong either way.
---
 internal/scanner/scanner.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/internal/scanner/scanner.go b/internal/scanner/scanner.go
index ab883c9166..f561320c23 100644
--- a/internal/scanner/scanner.go
+++ b/internal/scanner/scanner.go
@@ -707,7 +707,7 @@ func (s *Scanner) Scan() ast.Kind {
 					continue
 				}
 				s.errorAt(diagnostics.X_can_only_be_used_at_the_start_of_a_file, s.pos, 2)
-				s.pos += 2
+				s.pos++
 				s.token = ast.KindUnknown
 				break
 			}

From f2ba49959447cd383087d4d3ba61ef60c287e8ad Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <293473+sandersn@users.noreply.github.com>
Date: Fri, 13 Dec 2024 07:06:51 -0800
Subject: [PATCH 2/3] bonus:initial scan ends at any line break not just unix
 ones

---
 internal/scanner/scanner.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/internal/scanner/scanner.go b/internal/scanner/scanner.go
index 25128e7633..1620aeca29 100644
--- a/internal/scanner/scanner.go
+++ b/internal/scanner/scanner.go
@@ -703,7 +703,7 @@ func (s *Scanner) Scan() ast.Kind {
 			if s.charAt(1) == '!' {
 				if s.pos == 0 {
 					s.pos += 2
-					for s.char() >= 0 && s.char() != '\n' {
+					for s.char() >= 0 && !stringutil.IsLineBreak(s.char()) {
 						s.pos++
 					}
 					continue

From 45f69fb52ee5c0de73b0ec8b3d04f8d27c2be8d5 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <293473+sandersn@users.noreply.github.com>
Date: Wed, 18 Dec 2024 14:02:48 -0800
Subject: [PATCH 3/3] shebang scanning: Iterate over utf8 chars not bytes

---
 internal/scanner/scanner.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/internal/scanner/scanner.go b/internal/scanner/scanner.go
index ce09f39e6f..6132a184b6 100644
--- a/internal/scanner/scanner.go
+++ b/internal/scanner/scanner.go
@@ -707,8 +707,8 @@ func (s *Scanner) Scan() ast.Kind {
 			if s.charAt(1) == '!' {
 				if s.pos == 0 {
 					s.pos += 2
-					for s.char() >= 0 && !stringutil.IsLineBreak(s.char()) {
-						s.pos++
+					for ch, size := s.charAndSize(); size > 0 && !stringutil.IsLineBreak(ch); ch, size = s.charAndSize() {
+						s.pos += size
 					}
 					continue
 				}