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local info = {
version = 1.002,
comment = "scintilla lpeg lexer for metafun",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files",
}
if not lexer._CONTEXTEXTENSIONS then require("scite-context-lexer") end
local lexer = lexer
local global, string, table, lpeg = _G, string, table, lpeg
local token, exact_match = lexer.token, lexer.exact_match
local P, R, S, V, C, Cmt = lpeg.P, lpeg.R, lpeg.S, lpeg.V, lpeg.C, lpeg.Cmt
local type = type
local metafunlexer = { _NAME = "mps", _FILENAME = "scite-context-lexer-mps" }
local whitespace = lexer.WHITESPACE
local context = lexer.context
local metapostprimitives = { }
local metapostinternals = { }
local metapostshortcuts = { }
local metapostcommands = { }
local metafuninternals = { }
local metafunshortcuts = { }
local metafuncommands = { }
local mergedshortcuts = { }
local mergedinternals = { }
do
local definitions = context.loaddefinitions("scite-context-data-metapost")
if definitions then
metapostprimitives = definitions.primitives or { }
metapostinternals = definitions.internals or { }
metapostshortcuts = definitions.shortcuts or { }
metapostcommands = definitions.commands or { }
end
local definitions = context.loaddefinitions("scite-context-data-metafun")
if definitions then
metafuninternals = definitions.internals or { }
metafunshortcuts = definitions.shortcuts or { }
metafuncommands = definitions.commands or { }
end
for i=1,#metapostshortcuts do
mergedshortcuts[#mergedshortcuts+1] = metapostshortcuts[i]
end
for i=1,#metafunshortcuts do
mergedshortcuts[#mergedshortcuts+1] = metafunshortcuts[i]
end
for i=1,#metapostinternals do
mergedinternals[#mergedinternals+1] = metapostinternals[i]
end
for i=1,#metafuninternals do
mergedinternals[#mergedinternals+1] = metafuninternals[i]
end
end
local space = lexer.space -- S(" \n\r\t\f\v")
local any = lexer.any
local dquote = P('"')
local cstoken = R("az","AZ") + P("_")
local number = context.patterns.real
local cstokentex = R("az","AZ","\127\255") + S("@!?_")
-- we could collapse as in tex
local spacing = token(whitespace, space^1)
local rest = token('default', any)
local comment = token('comment', P('%') * (1-S("\n\r"))^0)
local internal = token('reserved', exact_match(mergedshortcuts,false))
local shortcut = token('data', exact_match(mergedinternals))
local helper = token('command', exact_match(metafuncommands))
local plain = token('plain', exact_match(metapostcommands))
local quoted = token('quote', dquote)
* token('string', P(1-dquote)^0)
* token('quote', dquote)
local texstuff = token('quote', P("btex ") + P("verbatimtex "))
* token('string', P(1-P(" etex"))^0)
* token('quote', P(" etex"))
local primitive = token('primitive', exact_match(metapostprimitives))
local identifier = token('default', cstoken^1)
local number = token('number', number)
local grouping = token('grouping', S("()[]{}")) -- can be an option
local special = token('special', S("#()[]{}<>=:\"")) -- or else := <> etc split
local texlike = token('warning', P("\\") * cstokentex^1)
local extra = token('extra', S("`~%^&_-+*/\'|\\"))
metafunlexer._rules = {
{ 'whitespace', spacing },
{ 'comment', comment },
{ 'internal', internal },
{ 'shortcut', shortcut },
{ 'helper', helper },
{ 'plain', plain },
{ 'primitive', primitive },
{ 'texstuff', texstuff },
{ 'identifier', identifier },
{ 'number', number },
{ 'quoted', quoted },
-- { 'grouping', grouping }, -- can be an option
{ 'special', special },
{ 'texlike', texlike },
{ 'extra', extra },
{ 'rest', rest },
}
metafunlexer._tokenstyles = context.styleset
metafunlexer._foldsymbols = {
_patterns = {
"%l+",
},
["primitive"] = {
["beginfig"] = 1,
["endfig"] = -1,
["def"] = 1,
["vardef"] = 1,
["primarydef"] = 1,
["secondarydef" ] = 1,
["tertiarydef"] = 1,
["enddef"] = -1,
["if"] = 1,
["fi"] = -1,
["for"] = 1,
["forever"] = 1,
["endfor"] = -1,
}
}
return metafunlexer
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