[ANN] stdlib 41.2.0 released
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- Subject: [ANN] stdlib 41.2.0 released
- From: "Gary V. Vaughan" <gary@...>
- Date: Sun, 8 Mar 2015 21:02:14 +0000
stdlib is a library of modules for common programming tasks, including
list, table and functional operations, objects, pickling, pretty-printing
and command-line option parsing.
I am happy to announce release 41.2.0 of stdlib.
stdlib's home page is at http://lua-stdlib.github.io/lua-stdlib
## Noteworthy changes in release 41.2.0 (2015年03月08日) [stable]
### New features
- New iterators, `std.npairs` and `std.rnpairs` behave like
`std.ipairs` and `std.ripairs` resp., except that they will visit
all integer keyed elements, including nil-valued "holes". This is
useful for iterating over argument lists with nils:
```lua
function fn (a, b, c) for _, v in npairs {...} do print (v) end
fn (nil, nil, 3) --> nil nil 3
```
- New `debug.getfenv` and `debug.setfenv` that work with Lua 5.2 and
5.3.
- `debug.argscheck` will skip typecheck for `self` parameter if the
function name specification contains a colon.
- New `debug.resulterror` is much like `debug.argerror`, but uses the
message format "bad result #n from 'fname'".
- New `debug.extramsg_mismatch` to generate `extramsg` argument for
`debug.argerror` or `debug.resulterror` on encountering a type
mismatch.
- New `debug.extramsg_toomany` to generate a too many arguments or
similar `extramsg` argument.
### Deprecations
- `debug.toomanyargmsg` has been deprecated in favour of the more
orthogal `debug.extramsg_toomany` api. You can rewrite clients of
deprecated api like this:
```lua
if maxn (argt) > 7 then
argerror ("fname", 8, extramsg_toomany ("argument", 7, maxn (argt)), 2)
end
```
### Bug fixes
- `std.getmetamethod` no longer rejects non-table subjects when
`_DEBUG.argcheck` is set.
- `functional.bind`, `functional.collect`, `functional.compose`,
`functional.filter` and `functional.map` propagate nil valued
arguments correctly.
- `functional.callable` no longer raises an argument error when passed
a nil valued argument.
- `debug.argcheck` and `debug.argscheck` accept "bool" as an alias for
"boolean" consistently.
- `io.catdir` and `io.dirname` no longer leak extra results from
implementation details.
### Incompatible changes
- `functional.collect` uses `std.npairs` as a default iterator rather
than `std.ipairs`.
Install it with LuaRocks, using:
luarocks install stdlib 41.2.0