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if not modules then modules = { } end modules ['chem-ini'] = {
version = 1.001,
comment = "companion to chem-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local format = string.format
local lpegmatch, patterns = lpeg.match, lpeg.patterns
local trace_molecules = false trackers.register("chemistry.molecules", function(v) trace_molecules = v end)
local report_chemistry = logs.reporter("chemistry")
local context = context
local cpatterns = patterns.context
chemistry = chemistry or { }
local chemistry = chemistry
-- The next code started out as adaptation of code from Wolfgang Schuster as posted
-- on the mailing list. The current version supports nested braces and unbraced
-- integers as scripts.
local moleculeparser = cpatterns.scripted
chemistry.moleculeparser = moleculeparser
function chemistry.molecule(str)
return lpegmatch(moleculeparser,str)
end
interfaces.implement {
name = "molecule",
arguments = "string",
actions = function(str)
if trace_molecules then
local rep = lpegmatch(moleculeparser,str)
report_chemistry("molecule %a becomes %a",str,rep)
context(rep)
else
context(lpegmatch(moleculeparser,str))
end
end,
}
-- interfaces.implement {
-- name = "molecule",
-- scope = "private",
-- action = function()
-- local str = scanstring()
-- if trace_molecules then
-- local rep = lpegmatch(moleculeparser,str)
-- report_chemistry("molecule %a becomes %a",str,rep)
-- context(rep)
-- else
-- context(lpegmatch(moleculeparser,str))
-- end
-- end,
-- }
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