-- Copyright 2006-2018 Mitchell mitchell.att.foicica.com. See License.txt.
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-- APDL LPeg lexer.
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local lexer = require('lexer')
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local token, word_match = lexer.token, lexer.word_match
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local P, R, S = lpeg.P, lpeg.R, lpeg.S
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local lex = lexer.new('apdl', {case_insensitive_fold_points = true})
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-- Whitespace.
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lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
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-- Keywords.
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lex:add_rule('keyword', token(lexer.KEYWORD, word_match[[
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*abbr *abb *afun *afu *ask *cfclos *cfc *cfopen *cfo *cfwrite *cfw *create
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*cre *cycle *cyc *del *dim *do *elseif *else *enddo *endif *end *eval *eva
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*exit *exi *get *go *if *list *lis *mfouri *mfo *mfun *mfu *mooney *moo *moper
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*mop *msg *repeat *rep *set *status *sta *tread *tre *ulib *uli *use *vabs
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*vab *vcol *vco *vcum *vcu *vedit *ved *vfact *vfa *vfill *vfi *vfun *vfu
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*vget *vge *vitrp *vit *vlen *vle *vmask *vma *voper *vop *vplot *vpl *vput
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*vpu *vread *vre *vscfun *vsc *vstat *vst *vwrite *vwr
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/anfile /anf /angle /ang /annot /ann /anum /anu /assign /ass /auto /aut /aux15
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/aux2 /aux /axlab /axl /batch /bat /clabel /cla /clear /cle /clog /clo /cmap
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/cma /color /col /com /config /contour /con /copy /cop /cplane /cpl /ctype
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/cty /cval /cva /delete /del /devdisp /device /dev /dist /dis /dscale /dsc
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/dv3d /dv3 /edge /edg /efacet /efa /eof /erase /era /eshape /esh /exit /exi
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/expand /exp /facet /fac /fdele /fde /filname /fil /focus /foc /format /for
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/ftype /fty /gcmd /gcm /gcolumn /gco /gfile /gfi /gformat /gfo /gline /gli
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/gmarker /gma /golist /gol /gopr /gop /go /graphics /gra /gresume /gre /grid
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/gri /gropt /gro /grtyp /grt /gsave /gsa /gst /gthk /gth /gtype /gty /header
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/hea /input /inp /larc /lar /light /lig /line /lin /lspec /lsp /lsymbol /lsy
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/menu /men /mplib /mpl /mrep /mre /mstart /mst /nerr /ner /noerase /noe
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/nolist /nol /nopr /nop /normal /nor /number /num /opt /output /out /page /pag
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/pbc /pbf /pcircle /pci /pcopy /pco /plopts /plo /pmacro /pma /pmeth /pme
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/pmore /pmo /pnum /pnu /polygon /pol /post26 /post1 /pos /prep7 /pre /psearch
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/pse /psf /pspec /psp /pstatus /pst /psymb /psy /pwedge /pwe /quit /qui /ratio
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/rat /rename /ren /replot /rep /reset /res /rgb /runst /run /seclib /sec /seg
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/shade /sha /showdisp /show /sho /shrink /shr /solu /sol /sscale /ssc /status
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/sta /stitle /sti /syp /sys /title /tit /tlabel /tla /triad /tri /trlcy /trl
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/tspec /tsp /type /typ /ucmd /ucm /uis /ui /units /uni /user /use /vcone /vco
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/view /vie /vscale /vsc /vup /wait /wai /window /win /xrange /xra /yrange /yra
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/zoom /zoo
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]], true))
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-- Identifiers.
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lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.word))
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-- Strings.
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lex:add_rule('string', token(lexer.STRING,
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lexer.delimited_range("'", true, true)))
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-- Numbers.
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lex:add_rule('number', token(lexer.NUMBER, lexer.float + lexer.integer))
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-- Functions.
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lex:add_rule('function', token(lexer.FUNCTION,
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lexer.delimited_range('%', true, true)))
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-- Labels.
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lex:add_rule('label', token(lexer.LABEL, lexer.starts_line(':') * lexer.word))
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-- Comments.
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lex:add_rule('comment', token(lexer.COMMENT, '!' * lexer.nonnewline^0))
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-- Operators.
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lex:add_rule('operator', token(lexer.OPERATOR, S('+-*/$=,;()')))
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-- Fold points.
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lex:add_fold_point(lexer.KEYWORD, '*if', '*endif')
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lex:add_fold_point(lexer.KEYWORD, '*do', '*enddo')
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lex:add_fold_point(lexer.KEYWORD, '*dowhile', '*enddo')
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lex:add_fold_point(lexer.COMMENT, '!', lexer.fold_line_comments('!'))
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return lex
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