programming-language

This subject was initially discussed in https://discourse.julialang.org/t/efficient-way-to-split-string-at-specific-index/83115/17 regarding a way to split a string into equal-length substrings.

The solutions discussed involved (for a string composed of 10 blocks of 8 strings)

• using a comprehension split8(str::String) = [str[i+1:8] for i in 0:8:length(str)]
• using a comprehension and `S

I think the Carbon project would welcome a proposal to add an explicit syntax that forces a tail call. This is aligned with our goals of predictable performance and giving the user explicit control.

My syntax suggestion: tail return F(...);.

Background:

• [[[clang::musttail]] attribute for guaranteed tail calls.](https://reviews.llvm.org/D9951

Whiskers' regex looks for <..> as opposed to tokenizing the input, so it is not able to detect truncated/mistyped input.

For example it can't detect that <!b is not terminated in<?b> X <!b Y </b>.

With some heuristics it could be improved: match for <?, <! and </ and only allow identifiers which are terminated with >, otherwise it is invalid.

_Originally posted by @axic in h

The example below prints "Hello, world" when using printf, and " Hello, world" (note the extra leading space) when using @pony_os_std_print (which is what StdStream.print is using).

Note that @pony_os_std_print will put as many leading spaces as \0 are present in the original string.

use @printf[I32](fmt: Pointer[U8] tag, ...)
use @pony_os_stdout[Pointer[U8]]()
use @pony

Motivation

The Git class currently doesn't support submodules which prevents for example using submodules in Quark repos.

Description of Proposed Feature

Add a submodule method to Git and add submodule recursion to the Quark install step, eg adding the --recurse-submodules git flag to the clone command. This will download an