As of Crucible version 4.2.1, there is no built-in syntax highlight support for Kotlin files. I have already filled a feature request for that.
However, for now, the only possibility is to add a custom syntax config as described here.
Has anyone already done it and can share the config?
I ended up creating this file by myself. It's based on Java config but uses Kotlin keywords.
This project contains also a script to generate a prefix tree of keywords, if you don't like the list I'm using.
Below you can find the file's contents:
syntaxdef kotlin {
/\s+/m : ;
#keywords
/(a(bstract|nnotation|s)|break|c(atch|lass|o(mpanion|n(st|tinue))|rossinline)\
|d(ata|elegate|o|ynamic)|e(lse|num|xternal)|f(i(eld|le|nally)|or|un|alse)|get\
|i(f|mport|n(fix|it|line|terface)|s|t)|n(oinline|ull)|o(bject|pe(n|rator)|ut)\
|p(a(ckage|ram)|roperty)|re(ceiver|ified|turn)|s(e(aled|tparam)|u(per|spend))\
|t(ailrec|h(is|row)|r(y|ue)|ype(alias|of))|va(l|rarg)|wh(en|ile))\b/ : {
region {
type=keyword;
index=word;
}
}
/[\p{L}_\$][\p{L}\p{N}_\$]*/ : {
region {
type=identifier;
index=word;
}
}
#annotation
/@[\p{L}_\$][\p{L}\p{N}_\$]*/ : {
region {
type=annotation;
index=word;
}
}
# string literals
/"/ : {
context {
/\\"/: ;
/\\./: ;
/$/m : exit;
"\"" : exit;
}
region ${ALL} {
type=string;
}
}
# char literal
/'/ : {
context {
/\\./: ;
/$/m : exit;
"'" : exit;
}
region ${ALL} {
type=char_literal;
}
}
/\/\/.*$/m : {
todo(${0});
region {
type=comment;
index=prose;
findlinks=true;
}
}
/\/\*\*(.*?)\*\//s : {
javadoc(${1});
region {
type=comment;
index=prose;
findlinks=true;
}
}
context javadoc {
/(\B@[a-zA-Z0-9-_.]+)\s*([^@\*]*)/ : {
region ${1} {
type=commentmeta;
}
}
}
/(0x[0-9a-f][0-9a-f_]*l?)|(0b[0-1][0-1_]*l?)|([0-9][0-9_]*(\.[0-9][0-9_]*)?|\.[0-9][0-9_]+)(e(\+|-)?[0-9][0-9_]*)?(f|l|d)?/i : {
region {
type=numeric;
}
}
/\/\*(.*?)\*\//s : {
todo(${1});
region {
type=comment;
findlinks=true;
}
region ${1} {
index=prose;
}
}
context todo {
/(?i)todo\s.*/ : {
region {
type=todo;
}
}
}
}