diff options
Diffstat (limited to 'tex/generic/context/luatex-fonts-merged.lua')
-rw-r--r-- | tex/generic/context/luatex-fonts-merged.lua | 57 |
1 files changed, 53 insertions, 4 deletions
diff --git a/tex/generic/context/luatex-fonts-merged.lua b/tex/generic/context/luatex-fonts-merged.lua index 655f83fe8..8891356ed 100644 --- a/tex/generic/context/luatex-fonts-merged.lua +++ b/tex/generic/context/luatex-fonts-merged.lua @@ -1,6 +1,6 @@ -- merged file : luatex-fonts-merged.lua -- parent file : luatex-fonts.lua --- merge date : 05/19/10 16:24:38 +-- merge date : 05/20/10 20:00:41 do -- begin closure to overcome local limits and interference @@ -587,7 +587,55 @@ 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 = { } @@ -774,7 +822,7 @@ 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) } @@ -797,7 +845,7 @@ 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 @@ -1435,6 +1483,7 @@ function table.insert_after_value(t,value,extra) insert(t,#t+1,extra) end + end -- closure do -- begin closure to overcome local limits and interference |