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" Vim syntax file
" Language: PROLOG
" Maintainers: Ralph Becket <rwab1@cam.sri.co.uk>,
" Thomas Koehler <jean-luc@picard.franken.de>
" Last Change: 2003 May 11
" URL: http://jeanluc-picard.de/vim/syntax/prolog.vim
" There are two sets of highlighting in here:
" If the "prolog_highlighting_clean" variable exists, it is rather sparse.
" Otherwise you get more highlighting.
" Quit when a syntax file was already loaded
if version < 600
syntax clear
elseif 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=+\*/+
syn match prologComment +%.*+
syn keyword prologKeyword module meta_predicate multifile dynamic
syn match prologCharCode +0'\\\=.+
syn region prologString start=+"+ skip=+\\"+ end=+"+
syn region prologAtom start=+'+ skip=+\\'+ end=+'+
syn region prologClauseHead start=+^[a-z][^(]*(+ skip=+\.[^ ]+ end=+:-\|\.$\|\.[ ]\|-->+
if !exists("prolog_highlighting_clean")
" some keywords
" some common predicates are also highlighted as keywords
" is there a better solution?
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
syn match prologOperator "=\\=\|=:=\|\\==\|=<\|==\|>=\|\\=\|\\+\|<\|>\|="
syn match prologAsIs "===\|\\===\|<=\|=>"
syn match prologNumber "\<[0123456789]*\>"
syn match prologCommentError "\*/"
syn match prologSpecialCharacter ";"
syn match prologSpecialCharacter "!"
syn match prologQuestion "?-.*\." contains=prologNumber
endif
syn sync ccomment maxlines=50
" Define the default highlighting.
" For version 5.7 and earlier: only when not done already
" For version 5.8 and later: only when an item doesn't have highlighting yet
if version >= 508 || !exists("did_prolog_syn_inits")
if version < 508
let did_prolog_syn_inits = 1
command -nargs=+ HiLink hi link <args>
else
command -nargs=+ HiLink hi def link <args>
endif
" The default highlighting.
HiLink prologComment Comment
HiLink prologCComment Comment
HiLink prologCharCode Special
if exists ("prolog_highlighting_clean")
HiLink prologKeyword Statement
HiLink prologClauseHead Statement
else
HiLink prologKeyword Keyword
HiLink prologClauseHead Constant
HiLink prologQuestion PreProc
HiLink prologSpecialCharacter Special
HiLink prologNumber Number
HiLink prologAsIs Normal
HiLink prologCommentError Error
HiLink prologAtom String
HiLink prologString String
HiLink prologOperator Operator
endif
delcommand HiLink
endif
let b:current_syntax = "prolog"
" vim: ts=8
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