patch 9.1.0550: filetype: antlr4 files are not recognized
Problem: filetype: antlr4 files are not recognized
Solution: Detect '*.g4' as antlr4 filetype, include a simple antlr4
syntax and filetype plugin (Yinzuo Jiang)
closes: #15191
Signed-off-by: Yinzuo Jiang <jiangyinzuo@foxmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/syntax/antlr4.vim b/runtime/syntax/antlr4.vim
new file mode 100644
index 0000000..33cc865
--- /dev/null
+++ b/runtime/syntax/antlr4.vim
@@ -0,0 +1,30 @@
+" Vim syntax file
+" Language: ANTLR4, ANother Tool for Language Recognition v4 <www.antlr.org>
+" Maintainer: Yinzuo Jiang <jiangyinzuo@foxmail.com>
+" Last Change: 2024 July 09
+
+" quit when a syntax file was already loaded
+if exists("b:current_syntax")
+ finish
+endif
+
+" Keywords. See https://github.com/antlr/antlr4/blob/4.13.1/doc/lexicon.md
+syn keyword antlr4Include import
+" https://github.com/antlr/antlr4/blob/4.13.1/doc/options.md
+" https://github.com/antlr/antlr4/blob/4.13.1/doc/grammars.md
+syn keyword antlr4Structure fragment lexer parser grammar options channels tokens mode
+syn keyword antlr4Statement returns locals
+syn keyword antlr4Exceptions throws catch finally
+
+" Comments.
+syn keyword antlr4Todo contained TODO FIXME XXX NOTE
+syn region antlr4Comment start="//" end="$" contains=antlr4Todo,@Spell
+syn region antlr4Comment start="/\*" end="\*/" contains=antlr4Todo,@Spell
+
+hi def link antlr4Include Include
+hi def link antlr4Structure Structure
+hi def link antlr4Statement Statement
+hi def link antlr4Exceptions Structure
+hi def link antlr4Comment Comment
+
+let b:current_syntax = "antlr4"