kotlin.ctags

# Regex for Kotlin
--langdef=kotlin
--langmap=kotlin:+.kt
--langmap=kotlin:+.kts
--regex-kotlin=/^[[:space:]]*((abstract|final|sealed|implicit|lazy|inner|open)[[:space:]]*)*(private[^ ]*|protected)?[[:space:]]*class[[:space:]]+([[:alnum:]_:]+)/\4/c,classes/
--regex-kotlin=/^[[:space:]]*((abstract|final|sealed|implicit|lazy)[[:space:]]*)*(private[^ ]*|protected)?[[:space:]]*object[[:space:]]+([[:alnum:]_:]+)/\4/o,objects/
--regex-kotlin=/^[[:space:]]*((abstract|final|sealed|implicit|lazy|open)[[:space:]]*)*(private[^ ]*|protected)?[[:space:]]*((abstract|final|sealed|implicit|lazy)[[:space:]]*)*data class[[:space:]]+([[:alnum:]_:]+)/\6/d,data classes/
--regex-kotlin=/^[[:space:]]*((abstract|final|sealed|implicit|lazy)[[:space:]]*)*(private[^ ]*|protected)?[[:space:]]*interface[[:space:]]+([[:alnum:]_:]+)/\4/i,interfaces/
--regex-kotlin=/^[[:space:]]*type[[:space:]]+([[:alnum:]_:]+)/\1/T,types/
--regex-kotlin=/^[[:space:]]*((abstract|final|sealed|implicit|lazy|override|open|private[^ ]*(\[[a-z]*\])*|protected)[[:space:]]*)*fun[[:space:]]+([[:alnum:]_:]+)/\4/m,methods/
--regex-kotlin=/^[[:space:]]*((abstract|final|sealed|implicit|lazy|override|private[^ ]*|protected)[[:space:]]*)*(const[[:space:]])*val[[:space:]]+([[:alnum:]_]+)/\4/C,constants/
--regex-kotlin=/^[[:space:]]*((abstract|final|sealed|implicit|lazy|override|private[^ ]*|protected)[[:space:]]*)*(lateinit[[:space:]]*)*var[[:space:]]+([[:alnum:]_]+)/\4/v,variables/
--regex-kotlin=/^[[:space:]]*package[[:space:]]+([[:alnum:]_.:]+)/\1/p,packages/
--regex-kotlin=/^[[:space:]]*import[[:space:]]+([[:alnum:]_.:]+)/\1/I,imports/

This appears to have a bug on the data classes line (with universal ctags). You'll get the error:

ctags: Non-alphanumeric char is used in kind name: 'data classes' in "--regex-kotlin" option

Because you can't have spaces in Kind names. Replacing line 7 with the line below fixes the problem.

--regex-kotlin=/^[[:space:]]*((abstract|final|sealed|implicit|lazy|open)[[:space:]]*)*(private[^ ]*|protected)?[[:space:]]*((abstract|final|sealed|implicit|lazy)[[:space:]]*)*data[[:space:]]+class[[:space:]]+([[:alnum:]_:]+)/\6/d,dataclasses/

How to use it? see here!😎