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if not modules then modules = { } end modules ['meta-tex'] = {
version = 1.001,
comment = "companion to meta-tex.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local P, C, lpegmatch = lpeg.P, lpeg.C, lpeg.match
local left = P("[")
local right = P("]")
local space = P(" ")
local argument = left * C((1-right)^1) * right
local pattern = (argument + space)^0
function metapost.sometxt(optional,str)
if optional == "" then
context.sometxta(str)
else
local one, two = lpegmatch(pattern,optional)
if two then
context.sometxtc(one,two,str)
elseif one then
context.sometxtb(one,str)
else
context.sometxta(str)
end
end
end
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