lua/lexers/gnuplot.lua

   1 -- Copyright 2006-2017 Mitchell mitchell.att.foicica.com. See LICENSE.
   2 -- Gnuplot LPeg lexer.
   3
   4 local l = require('lexer')
   5 local token, word_match = l.token, l.word_match
   6 local P, R, S = lpeg.P, lpeg.R, lpeg.S
   7
   8 local M = {_NAME = 'gnuplot'}
   9
  10 -- Whitespace.
  11 local ws = token(l.WHITESPACE, l.space^1)
  12
  13 -- Comments.
  14 local comment = token(l.COMMENT, '#' * l.nonnewline^0)
  15
  16 -- Strings.
  17 local sq_str = l.delimited_range("'")
  18 local dq_str = l.delimited_range('"')
  19 local bk_str = l.delimited_range('[]', true)
  20 local bc_str = l.delimited_range('{}', true)
  21 local string = token(l.STRING, sq_str + dq_str + bk_str + bc_str)
  22
  23 -- Keywords.
  24 local keyword = token(l.KEYWORD, word_match{
  25   'cd', 'call', 'clear', 'exit', 'fit', 'help', 'history', 'if', 'load',
  26   'pause', 'plot', 'using', 'with', 'index', 'every', 'smooth', 'thru', 'print',
  27   'pwd', 'quit', 'replot', 'reread', 'reset', 'save', 'set', 'show', 'unset',
  28   'shell', 'splot', 'system', 'test', 'unset', 'update'
  29 })
  30
  31 -- Functions.
  32 local func = token(l.FUNCTION, word_match{
  33   'abs', 'acos', 'acosh', 'arg', 'asin', 'asinh', 'atan', 'atan2', 'atanh',
  34   'besj0', 'besj1', 'besy0', 'besy1', 'ceil', 'cos', 'cosh', 'erf', 'erfc',
  35   'exp', 'floor', 'gamma', 'ibeta', 'inverf', 'igamma', 'imag', 'invnorm',
  36   'int', 'lambertw', 'lgamma', 'log', 'log10', 'norm', 'rand', 'real', 'sgn',
  37   'sin', 'sinh', 'sqrt', 'tan', 'tanh', 'column', 'defined', 'tm_hour',
  38   'tm_mday', 'tm_min', 'tm_mon', 'tm_sec', 'tm_wday', 'tm_yday', 'tm_year',
  39   'valid'
  40 })
  41
  42 -- Variables.
  43 local variable = token(l.VARIABLE, word_match{
  44   'angles', 'arrow', 'autoscale', 'bars', 'bmargin', 'border', 'boxwidth',
  45   'clabel', 'clip', 'cntrparam', 'colorbox', 'contour', 'datafile ',
  46   'decimalsign', 'dgrid3d', 'dummy', 'encoding', 'fit', 'fontpath', 'format',
  47   'functions', 'function', 'grid', 'hidden3d', 'historysize', 'isosamples',
  48   'key', 'label', 'lmargin', 'loadpath', 'locale', 'logscale', 'mapping',
  49   'margin', 'mouse', 'multiplot', 'mx2tics', 'mxtics', 'my2tics', 'mytics',
  50   'mztics', 'offsets', 'origin', 'output', 'parametric', 'plot', 'pm3d',
  51   'palette', 'pointsize', 'polar', 'print', 'rmargin', 'rrange', 'samples',
  52   'size', 'style', 'surface', 'terminal', 'tics', 'ticslevel', 'ticscale',
  53   'timestamp', 'timefmt', 'title', 'tmargin', 'trange', 'urange', 'variables',
  54   'version', 'view', 'vrange', 'x2data', 'x2dtics', 'x2label', 'x2mtics',
  55   'x2range', 'x2tics', 'x2zeroaxis', 'xdata', 'xdtics', 'xlabel', 'xmtics',
  56   'xrange', 'xtics', 'xzeroaxis', 'y2data', 'y2dtics', 'y2label', 'y2mtics',
  57   'y2range', 'y2tics', 'y2zeroaxis', 'ydata', 'ydtics', 'ylabel', 'ymtics',
  58   'yrange', 'ytics', 'yzeroaxis', 'zdata', 'zdtics', 'cbdata', 'cbdtics',
  59   'zero', 'zeroaxis', 'zlabel', 'zmtics', 'zrange', 'ztics', 'cblabel',
  60   'cbmtics', 'cbrange', 'cbtics'
  61 })
  62
  63 -- Identifiers.
  64 local identifier = token(l.IDENTIFIER, l.word)
  65
  66 -- Operators.
  67 local operator = token(l.OPERATOR, S('-+~!$*%=<>&|^?:()'))
  68
  69 M._rules = {
  70   {'whitespace', ws},
  71   {'keyword', keyword},
  72   {'function', func},
  73   {'variable', variable},
  74   {'identifier', identifier},
  75   {'string', string},
  76   {'comment', comment},
  77   {'operator', operator},
  78 }
  79
  80 return M