/usr/share/source-highlight/haxe.lang is in libsource-highlight-common 3.1.8-1.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | preproc = '^[[:blank:]]*#((if|else)[[:blank:]]*[[:word:]]*|end)'
include "java.lang"
subst keyword = "abstract|assert|break|case|cast|catch|class|continue|default|do|else|enum|extends|extern|false|final|finally|for|function|if|implements|in|inline|interface|new|null|override|private|protected|public|return|static|super|switch|synchronized|this|throw|throws|true|try|typedef|untyped|var|while"
subst type = "Bool|Dynamic|Float|Int|Void"
|