" Vim syntax file " Language: PROLOG " Maintainer: Anton Kochkov <anton.kochkov@gmail.com> " Last Change: 2021 Jan 05 " There are two sets of highlighting in here: " If the "prolog_highlighting_clean" variable exists, it is rather sparse. " Otherwise you get more highlighting. " " You can also set the "prolog_highlighting_no_keyword" variable. If set, " keywords will not be highlighted. " quit when a syntax file was already loaded if exists("b:current_syntax") finish endif " Prolog is case sensitive. syn case match " Very simple highlighting for comments, clause heads and " character codes. It respects prolog strings and atoms. syn region prologCComment start=+/\*+ end=+\*/+ contains=@Spell syn match prologComment +%.*+ contains=@Spell if !exists("prolog_highlighting_no_keyword") syn keyword prologKeyword module meta_predicate multifile dynamic endif syn match prologCharCode +0'\\\=.+ syn region prologString start=+"+ skip=+\\\\\|\\"+ end=+"+ contains=@Spell syn region prologAtom start=+'+ skip=+\\\\\|\\'+ end=+'+ syn region prologClause matchgroup=prologClauseHead start=+^\s*[a-z]\w*+ matchgroup=Normal end=+\.\s\|\.$+ contains=ALLBUT,prologClause contains=@NoSpell if !exists("prolog_highlighting_clean") " some keywords " some common predicates are also highlighted as keywords " is there a better solution? if !exists("prolog_highlighting_no_keyword") syn keyword prologKeyword abolish current_output peek_code syn keyword prologKeyword append current_predicate put_byte syn keyword prologKeyword arg current_prolog_flag put_char syn keyword prologKeyword asserta fail put_code syn keyword prologKeyword assertz findall read syn keyword prologKeyword at_end_of_stream float read_term syn keyword prologKeyword atom flush_output repeat syn keyword prologKeyword atom_chars functor retract syn keyword prologKeyword atom_codes get_byte set_input syn keyword prologKeyword atom_concat get_char set_output syn keyword prologKeyword atom_length get_code set_prolog_flag syn keyword prologKeyword atomic halt set_stream_position syn keyword prologKeyword bagof integer setof syn keyword prologKeyword call is stream_property syn keyword prologKeyword catch nl sub_atom syn keyword prologKeyword char_code nonvar throw syn keyword prologKeyword char_conversion number true syn keyword prologKeyword clause number_chars unify_with_occurs_check syn keyword prologKeyword close number_codes var syn keyword prologKeyword compound once write syn keyword prologKeyword copy_term op write_canonical syn keyword prologKeyword current_char_conversion open write_term syn keyword prologKeyword current_input peek_byte writeq syn keyword prologKeyword current_op peek_char endif syn match prologOperator "=\\=\|=:=\|\\==\|=<\|==\|>=\|\\=\|\\+\|=\.\.\|<\|>\|=" syn match prologAsIs "===\|\\===\|<=\|=>" syn match prologNumber "\<\d*\>'\@!" syn match prologNumber "\<0[xX]\x*\>'\@!" syn match prologCommentError "\*/" syn match prologSpecialCharacter ";" syn match prologSpecialCharacter "!" syn match prologSpecialCharacter ":-" syn match prologSpecialCharacter "-->" syn match prologQuestion "?-.*\." contains=prologNumber endif syn sync maxlines=50 " Define the default highlighting. " Only when an item doesn't have highlighting yet " The default highlighting. hi def link prologComment Comment hi def link prologCComment Comment hi def link prologCharCode Special if exists ("prolog_highlighting_clean") hi def link prologKeyword Statement hi def link prologClauseHead Statement hi def link prologClause Normal else hi def link prologKeyword Keyword hi def link prologClauseHead Constant hi def link prologClause Normal hi def link prologQuestion PreProc hi def link prologSpecialCharacter Special hi def link prologNumber Number hi def link prologAsIs Normal hi def link prologCommentError Error hi def link prologAtom String hi def link prologString String hi def link prologOperator Operator endif let b:current_syntax = "prolog" " vim: ts=8