parser: fix pub: not being detected in structs in -vls-mode (#26581)

Author: dy-tea

vlib/v/parser/struct.v

@@ -143,7 +143,8 @@ fn (mut p Parser) struct_decl(is_anon bool) ast.StructDecl {
 		}
 		p.check(.lcbr)
 		// if p.is_vls && p.tok.kind == .key_struct { // p.tok.is_key() {
-		if p.is_vls && p.tok.is_key() && p.tok.kind != .key_mut {
+		if p.is_vls && p.tok.is_key() && !(p.tok.kind in [.key_pub, .key_mut]
+			&& p.peek_tok.kind in [.colon, .key_mut]) {
 			// End parsing after `struct Foo {` in vls mode to avoid lots of junk errors
 			// If next token after { is a key, the struct wasn't finished
 			p.error('expected `}` to finish a struct definition')

vlib/v/tests/vls/struct_text.vv

@@ -5,3 +5,25 @@ mut:
 	a int
 	b string
 }
+
+struct MyPubS {
+pub:
+	a int
+	b string
+}
+
+struct MyPubMutS {
+pub mut:
+	a int
+	b string
+}
+
+struct Complex {
+mut:
+	mm int
+pub:
+	pp string
+pub mut:
+	pma int
+	pmb string
+}