Per https://datatracker.ietf.org/doc/html/rfc9110#name-user-agent a
User-Agent is defined as follows:
```
User-Agent = product *( RWS ( product / comment ) )
```
Where
```
product = token ["/" product-version]
product-version = token
```
In this case, `token` is defined in RFC 7230 -
https://datatracker.ietf.org/doc/html/rfc7230#section-3.2.6:
```
token = 1*tchar
tchar = "!" / "#" / "$" / "%" / "&" / "'" / "*"
/ "+" / "-" / "." / "^" / "_" / "`" / "|" / "~"
/ DIGIT / ALPHA
; any VCHAR, except delimiters
```
or, in the original RFC 2616 -
https://datatracker.ietf.org/doc/html/rfc2616#section-2.2 (next page):
```
token = 1*<any CHAR except CTLs or separators>
separators = "(" | ")" | "<" | ">" | "@"
| "," | ";" | ":" | "\" | <">
| "/" | "[" | "]" | "?" | "="
| "{" | "}" | SP | HT
```
which means that a `token` cannot have whitespace. Not sure if this
should be in the breaking changelog section - theoretically, some
clients might've relied on the old Nim user-agent?
For some extra info, some other languages seem to have adopted the same
hyphen user agent to specify the language + module, e.g.:
-
https://github.com/python/cpython/blob/main/Lib/urllib/request.py#L1679
(`Python-urllib/<version>`)
Fixes#22862.
fixes#22856
`-d:nimStrictDelete` is introduced in 1.6.0, which promised to be
enabled in the coming versions. To keep backwards incompatibilities, it
also extends the feature of `-d:nimAuditDelete`, which now mimics the
old behaviors.
1. `freeAddrInfo` is called prematurely, the variable `myAddr` is still
in use
2. Use defer syntax to ensure that `freeAddrInfo` is also called on
exceptions
At least on modern Nim `tempfiles` is not usable if the user has
https://github.com/oprypin/nim-random installed, because the compiler
picks the nimble path over the stdlib path (apparently).
fix#22834
Edit: also fixes `result.addrList` when IPv6, which previously only
performed a `result.addrList = cstringArrayToSeq(s.h_addr_list)` which
does not provide the textual representation of an IPv6
Theoretical Benefits / Plans:
- Typed assembler-like language.
- Allows for a CPS transformation.
- Can replace the existing C backend by a new C backend.
- Can replace the VM.
- Can do more effective "not nil" checking and static array bounds
checking.
- Can be used instead of the DFA.
- Easily translatable to LLVM.
- Reasonably easy to produce native code from.
- Tiny memory consumption. No pointers, no cry.
**In very early stages of development.**
Todo:
- [x] Map Nim types to IR types.
- [ ] Map Nim AST to IR instructions:
- [x] Map bitsets to bitops.
- [ ] Implement string cases.
- [ ] Implement range and index checks.
- [x] Implement `default(T)` builtin.
- [x] Implement multi string concat.
- [ ] Write some analysis passes.
- [ ] Write a backend.
- [x] Integrate into the compilation pipeline.
This would be handy for making terminal apps which display content below
the prompt (e.g. `fzf` does this).
Need to test it on windows before I remove "draft" status.
---------
Co-authored-by: Matt Rixman <MatrixManAtYrService@users.noreply.github.com>
Co-authored-by: Andreas Rumpf <rumpf_a@web.de>
I couldn't find any documentation on the syntax for --hint:X:on|off with
`nimscript` except in [this old forum
post](https://forum.nim-lang.org/t/8526#55236).
- `copyFile` allows to specify `bufferSize` instead of hardcoded wrong
value. Tiny diff.
# Performance
- 1200% Performance improvement.
# Check it yourself
Execute:
```bash
for i in $(seq 0 10); do
bs=$((1024*2**$i))
printf "%7s Kb\t" $bs
timeout --foreground -sINT 2 dd bs=$bs if=/dev/zero of=/dev/null 2>&1 | sed -n 's/.* \([0-9.,]* [GM]B\/s\)/\1/p'
done
```
(This script can be ported to PowerShell for Windows I guess, it works
in Windows MinGW Bash anyways).
# Stats
- Hardcoded `8192` or `8000` Kb bufferSize gives `5` GB/s.
- Setting `262144` Kb bufferSize gives `65` GB/s (script suggestion).
---------
Co-authored-by: Andreas Rumpf <rumpf_a@web.de>
```nim
echo newString(8)
```
results in:
```
D:\User\test.js:25
var code_33556944 = c_33556931.toString(16);
^
TypeError: Cannot read properties of undefined (reading 'toString')
at toJSStr (D:\User\test.js:25:50)
at rawEcho (D:\User\test.js:70:16)
at Object.<anonymous> (D:\User\test.js:101:1)
at Module._compile (node:internal/modules/cjs/loader:1095:14)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1147:10)
at Module.load (node:internal/modules/cjs/loader:975:32)
at Function.Module._load (node:internal/modules/cjs/loader:822:12)
at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
at node:internal/main/run_main_module:17:47
Node.js v17.0.1
Error: execution of an external program failed: '"C:\Program Files\nodejs\node.exe" --unhandled-rejections=strict D:\User\test.js'
```
`{.push overflowChecks: off.}` works in backends. Though it could be
implemented as a magic function.
By inspecting the generated C code, the overflow check is eliminated in
the debug or release mode.
Likewise, the index checking is probably not needed.
