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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",
}
local lexer = lexer
local global, string, table, lpeg = _G, string, table, lpeg
local token, style, colors, exact_match, no_style = lexer.token, lexer.style, lexer.colors, lexer.exact_match, lexer.style_nothing
local P, R, S, V, C, Cmt = lpeg.P, lpeg.R, lpeg.S, lpeg.V, lpeg.C, lpeg.Cmt
local type, next, pcall, loadfile = type, next, pcall, loadfile
module(...)
local metafunlexer = _M
local metafunhelpers = { }
local metafunconstants = { }
local plaincommands = { }
local primitivecommands = { }
do
local definitions = lexer.context.loaddefinitions("scite-context-data-metapost")
if definitions then
plaincommands = definitions.plain or { }
primitivecommands = definitions.primitives or { }
end
local definitions = lexer.context.loaddefinitions("scite-context-data-metafun")
if definitions then
metafunhelpers = definitions.helpers or { }
metafunconstants = definitions.constants or { }
end
end
local whitespace = metafunlexer.WHITESPACE -- triggers states
local space = lexer.space -- S(" \n\r\t\f\v")
local any = lexer.any
local digit = R("09")
local sign = S("+-")
local period = P(".")
local dquote = P('"')
local cstoken = R("az","AZ") + P("_")
local number = sign^-1 * ( -- at most one
digit^1 * period * digit^0 -- 10.0 10.
+ digit^0 * period * digit^1 -- 0.10 .10
+ digit^1 -- 10
)
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 constant = token('data', exact_match(metafunconstants))
local helper = token('command', exact_match(metafunhelpers))
local plain = token('plain', exact_match(plaincommands))
local quoted = token('quote', dquote)
* token('string', P(1-dquote)^1)
* token('quote', dquote)
local primitive = token('primitive', exact_match(primitivecommands))
local identifier = token('default', cstoken)
local number = token('number', number)
local special = token('special', S("#()[]<>=:\"")) -- or else := <> etc split
local texlike = token('string', P("\\") * cstokentex^1)
local extra = token('extra', S("`~%^&_-+/\'|\\"))
_rules = {
{ 'whitespace', spacing },
{ 'comment', comment },
{ 'constant', constant },
{ 'helper', helper },
{ 'plain', plain },
{ 'primitive', primitive },
{ 'identifier', identifier },
{ 'number', number },
{ 'quoted', quoted },
{ 'special', special },
-- { 'texlike', texlike },
{ 'extra', extra },
{ 'rest', rest },
}
_tokenstyles = lexer.context.styleset
_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,
}
}
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