C2016: C requires that a struct or union have at least one member

[rsteube]

I'm trying to add this to helix.
But compilation fails with C2016:

D:\a\helix\helix\runtime\grammars\sources\templ\src\scanner.c(67): warning C4189: 'found': local variable is initialized but not referenced
D:\a\helix\helix\runtime\grammars\sources\templ\src\scanner.c(93): error C2016: C requires that a struct or union have at least one member
D:\a\helix\helix\runtime\grammars\sources\templ\src\scanner.c(341): warning C4244: 'function': conversion from 'int32_t' to 'wint_t', possible loss of data

Adding a dummy member seems to fix it:

diff --git a/src/scanner.c b/src/scanner.c
index bde6561..efaa773 100644
--- a/src/scanner.c
+++ b/src/scanner.c
@@ -90,6 +90,7 @@ enum TokenType {
 };
 
 typedef struct {
+  bool dummy;
 } Scanner;
 
 static unsigned serialize(Scanner *scanner, char *buffer) { return 0; }

But as I understand the scanner.c file is generated by tree-sitter?

[vrischmann]

Yes the scanner is generated, I don't think I can do much about this.

You could try to use gcc with mingw ? I have no experience using treesitter on Windows unfortunately, I can't help you there.

[rsteube]

Oh wait, is that true? Seems to me like the parser.c is generated, but scanner.c is updated by hand.

[vrischmann]

You're right, my bad I remembered incorrectly.