0.20.2现已发布
17 July 2019 Nim团队
Nim团队很荣幸为大家带来0.20.2版本，这是我们为1.0版本准备的第二个RC版本。
请点击之前的版本发布日志 以查看更多关于0.20版本的信息，以及我们关于1.0及之后版本的计划。 此版本主要包含了对0.20.0（1.0 RC1）版本的BUG修复。
唯一的新功能是我们添加了名为toOpenArray的切片操作符，
现对JavaScript后端可用。
这次更新距离上一个版本的发布尽管只差了一个月， 但它却包含了超过200次的新commit，修复了超过70个被提出来的issues， 并且带来了很多应该能让Nim更加稳定的改进。
代码风格检查
在0.20.0版本发布后，我们改进了我们的代码样式检查器，
现在可以通过在启动Nim时加上--styleCheck:error标识，
这意味着可以对编译器和标准库进行代码风格检查了，
如果使用了不同的代码风格（比如：fooBar和foo_bar），那么这些代码将不会被编译。
Nimpretty
我们对于这个版本的关注点还有一个，那就是我们的nimpretty工具：
这是一个Nim的源码美化器，
用来把代码格式化得符合官方风格(NEP-1)。
我们进行了超过30个提交，以改善nimpretty体验，让它更有能力应对现实场景。
新的runtime
新的runtime进展很顺利，但它还没有达到预想的状态，
所以他在1.0版本中将作为一个可选的特性。
下一个重要的里程碑是使新的运行时与async一起工作。
只有完成这一点，我们才会真正地进行推广，让大家优先考虑它。
安装0.20.2版本
你之前如果已经使用choosenim来安装了旧版本的Nim，
那么更新到0.20.2版本将会非常的简单：
$ choosenim update stable
如果你之前并没有使用它，你可以通过
这篇介绍来获取choosenim。
当然你也可以直接根据我们的安装页面，
单独安装Nim。
（译者注：在Windows下的choosenim只支持32位的下载， 你可以在64位系统下进行安装，但是这样的话你的nim版本只能也使用32位的，否则会报错）
不向后兼容的更新
-
All
strutils.rfindprocs now takestartandlastlikestrutils.findwith the same data slice/index meaning. This is backwards compatible for calls not changing therfindstartparameter from its default. (#11487)In the unlikely case that you were using
rfind X, start=N, orrfind X, N, then you need to change that torfind X, last=Norrfind X, 0, N. (This should minimize gotchas porting code from other languages like Python or C++.) -
On Windows stderr/stdout/stdin are not opened as binary files anymore. Use the switch
-d:nimBinaryStdFilesfor a transition period.
影响标准库的更新
- Mac OS X / BSD: TSa_Family is now the
uint8type, so type conversions likex.sin_family = uint16 toInt(nativesockets.AF_INET)need to be changed intox.sin_family = TSa_Family toInt(nativesockets.AF_INET).
库的新增
- 用于JS的
toOpenArray现已可用。
库的更新
-
Fix async IO operations stalling even after socket is closed. (#11232)
-
More informative error message for
streams.openFileStream. (#11438)
编译器更新
-
Better error message for IndexError for empty containers. (#11476)
-
Fix regression in semfold for old right shift. (#11477)
-
Fix for passing tuples as static params to macros. (#11423)
Bug修复
- Fixed “nimpretty goes crazy with this snippet” (#10295)
- Fixed “nimpretty doesn’t trim all whitespace on the right side of an export marker” (#10177)
- Fixed “nimpretty gives invalid indentation to array elements” (#9505)
- Fixed “nimpretty doesn’t indent correctly if preceding line ends with
;,{etc” (#10159) - Fixed “Nimpretty wrong indentation for doc comments” (#10156)
- Fixed “HttpClient Documentation needs Proxy example” (#11281)
- Fixed “nimpretty aligns comment annoyingly” (#9399)
- Fixed “ENDB missing from Docs and TheIndex, remove ENDB from –fullhelp” (#11431)
- Fixed “Nimrod on Documentation generator” (#11460)
- Fixed “nimpretty (de)indents code where it shouldn’t” (#11468)
- Fixed “nimpretty adds spaces where it shouldn’t” (#11470)
- Fixed “nimpretty formats enums differently based on commas” (#11467)
- Fixed “strutils.rfind start parameter is unecessarily unusual” (#11430)
- Fixed “TinyC is not documented” (#11495)
- Fixed “c2nim missing from 0.20.0” (#11434)
- Fixed “nimsuggest doesn’t work unless compiled with -d:danger” (#11482)
- Fixed “random.initRand crashes in Nim 0.20.0 JS backend” (#11450)
- Fixed “0.20.0 fails to bootstrap when passing “–verbosity:2” (or 3) to koch” (#11436)
- Fixed “Destructors lifting doesn’t work with inheritance” (#11517)
- Fixed “std/sums missing from TheIndex” (#11543)
- Fixed “sequtils module: link is broken” (#11546)
- Fixed “Case Statement Macros do not work in functions above exported functions.” (#11556)
- Fixed “newruntime: internal error when initializing a proc variable” (#11533)
- Fixed “newruntime: error when modifying a sequence” (#11524)
- Fixed “fmod and other math module functions are missing in js mode” (#4630)
- Fixed “Object variants and new runtime” (#11563)
- Fixed “newruntime exceptions” (#11577)
- Fixed “nimpretty is not aware that the next line is a part of the same context” (#11469)
- Fixed “Distinct procs fail to compile” (#11600)
- Fixed “[SharedTables] Error: undeclared identifier: ‘defaultInitialSize’” (#11588)
- Fixed “newSeqOfCap is not working in newruntime” (#11098)
- Fixed “nimpretty destroys source with a source code filter” (#11532)
- Fixed “Unexpected behaviour when constructing with
result” (#11525) - Fixed “Regression in 0.20.0: Nested proc using outer scope variable fails to compile” (#11523)
- Fixed “os:standalone Error: redefinition of ‘nimToCStringConv’ “ (#11445)
- Fixed “No ambiguity error on field overloaded by
field=” (#11514) - Fixed “object variants and new runtime part 2” (#11611)
- Fixed “seq Error: unhandled exception: value out of range: 32772 “ (#11606)
- Fixed “Compiled binary includes full path to internal nim files” (#11572)
- Fixed “Newruntime: top-level string variable is empty after an array assignment” (#11614)
- Fixed “Newruntime: raise ObjContructor() doesn’t compile” (#11628)
- Fixed “Owned ref can be copied and causes double-free” (#11617)
- Fixed “When compiling to JS (in
-d:release) output contains toolchain path on dev’s machine” (#11545) - Fixed “wrong unicode string output” (#11618)
- Fixed “unittest “generic instantiation too nested” error” (#11515)
- Fixed “Last read of a var parameter generates sink instead of assignment” (#11633)
- Fixed “const table with proc type does not compile anymore” (#11479)
- Fixed “Can’t use offsetOf on object that ends with an UncheckedArray” (#11320)
- Fixed “Newruntime/regression: Bad codegen for inline methods” (#11636)
- Fixed “String or sequences inside a loop are not cleared in each iteration” (#11510)
- Fixed “Nim -v doesn’t acknowledge new danger flag” (#11484)
- Fixed “SIGSEGV while compiling when trying to instantiate a case type, that uses an enum with non-zero start” (#11585)
- Fixed “Compile-time usage of parts of strutils fails when using -d:useNimRtl” (#8405)
- Fixed “regression(0.20):
finallyblock executed twice in VM” (#11610) - Fixed “exportc symbol not exported, leading to link error” (#11651)
- Fixed “Render bug: opearator priority can be wrong for second argument” (#11662)
- Fixed “Nim & C disagree on type size” (#6860)
- Fixed “Spawn passes refs across threads” (#7057)
- Fixed “BUG: “varargs[string,
$]” calls$n^2 times instead of n times (n=len(varargs))” (#8316) - Fixed “Problem with the same name for module and exported type” (#3333)
- Fixed “–gc:go does not work anymore” (#11447)
- Fixed “Error: inconsistent typing for reintroduced symbol” (#11494)
- Fixed “Auto generated destructors for tuples/objects fail with “non-trivial” error…” (#11671)
- Fixed “Regression: parameter default value + typedesc parameter causes compiler crash” (#11660)
- Fixed “newruntime: undetected dangling ref” (#11350)
- Fixed “Newruntime: setLen() not working on sequences of owned refs” (#11530)
- Fixed “Incorrect overflow/underflow error in case statements” (#11551)
- Fixed “cgen preprocessor directive placed after struct declaration” (#11691)
- Fixed “
continuein anexcept Exception as eblock crashes the compiler.” (#11683) - Fixed “nimsuggest, nim check segfault when using bindSym and doAssert” (#10901)
- Fixed “Nimpretty issue, multiline string of x length only causes output grow every time.” (#11700)
- Fixed “Array indexed by distinct int doesnt work with iterators” (#11715)