diff options
Diffstat (limited to 'scripts/context/stubs/unix/mtxrun')
-rwxr-xr-x | scripts/context/stubs/unix/mtxrun | 61 |
1 files changed, 56 insertions, 5 deletions
diff --git a/scripts/context/stubs/unix/mtxrun b/scripts/context/stubs/unix/mtxrun index d3e50e00e..ae0ee162f 100755 --- a/scripts/context/stubs/unix/mtxrun +++ b/scripts/context/stubs/unix/mtxrun @@ -525,7 +525,55 @@ local concat, sort, insert, remove = table.concat, table.sort, table.insert, tab local format, find, gsub, lower, dump, match = string.format, string.find, string.gsub, string.lower, string.dump, string.match local getmetatable, setmetatable = getmetatable, setmetatable local type, next, tostring, tonumber, ipairs = type, next, tostring, tonumber, ipairs -local unpack = unpack or table.unpack + +-- Starting with version 5.2 Lua no longer provide ipairs, which makes +-- sense. As we already used the for loop and # in most places the +-- impact on ConTeXt was not that large; the remaining ipairs already +-- have been replaced. In a similar fashio we also hardly used pairs. +-- +-- Just in case, we provide the fallbacks as discussed in Programming +-- in Lua (http://www.lua.org/pil/7.3.html): + +if not ipairs then + + -- for k, v in ipairs(t) do ... end + -- for k=1,#t do local v = t[k] ... end + + local function iterate(a,i) + i = i + 1 + local v = a[i] + if v ~= nil then + return i, v --, nil + end + end + + function ipairs(a) + return iterate, a, 0 + end + +end + +if not pairs then + + -- for k, v in pairs(t) do ... end + -- for k, v in next, t do ... end + + function pairs(t) + return next, t -- , nil + end + +end + +-- Also, unpack has been moved to the table table, and for compatiility +-- reasons we provide both now. + +if not table.unpack then + table.unpack = _G.unpack +elseif not unpack then + _G.unpack = table.unpack +end + +-- extra functions, some might go (when not used) function table.strip(tab) local lst = { } @@ -712,7 +760,7 @@ end table.fastcopy = fastcopy table.copy = copy --- rougly: copy-loop : unpack : sub == 0.9 : 0.4 : 0.45 (so in critical apps, use unpack) +-- roughly: copy-loop : unpack : sub == 0.9 : 0.4 : 0.45 (so in critical apps, use unpack) function table.sub(t,i,j) return { unpack(t,i,j) } @@ -735,7 +783,7 @@ function table.one_entry(t) -- obolete, use inline code instead return n and not next(t,n) end ---~ function table.starts_at(t) -- obsolete, not nice +--~ function table.starts_at(t) -- obsolete, not nice anyway --~ return ipairs(t,1)(t,0) --~ end @@ -1374,6 +1422,7 @@ function table.insert_after_value(t,value,extra) end + end -- of closure do -- create closure to overcome 200 locals limit @@ -6974,8 +7023,10 @@ local function reverse(collected) end local function attribute(collected,name) - local at = collected and collected[1].at - return at and at[name] + if collected and #collected > 0 then + local at = collected[1].at + return at and at[name] + end end local function att(id,name) |