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local info = {
version = 1.002,
comment = "scintilla lpeg lexer for pdf xref",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files",
}
-- no longer used: nesting lexers with whitespace in start/stop is unreliable
local P, R = lpeg.P, lpeg.R
local lexer = require("lexer")
local context = lexer.context
local patterns = context.patterns
local token = lexer.token
local pdfxreflexer = lexer.new("pdfxref","scite-context-lexer-pdf-xref")
local whitespace = pdfxreflexer.whitespace
local spacing = patterns.spacing
local cardinal = patterns.cardinal
local alpha = patterns.alpha
local t_spacing = token(whitespace, spacing)
local p_xref = P("xref")
local t_xref = token("keyword",p_xref)
* token("number", cardinal * spacing * cardinal * spacing)
local t_number = token("number", cardinal * spacing * cardinal * spacing)
* token("keyword", alpha)
pdfxreflexer._rules = {
{ "whitespace", t_spacing },
{ "xref", t_xref },
{ "number", t_number },
}
pdfxreflexer._tokenstyles = context.styleset
return pdfxreflexer
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