notriddle

@notriddle's Rust 2020 wishlist

or, Rust 2021: Integration

This is just a brain dump. Doing all of this is not going to happen, but all of it is stuff I know of that impacts Rust's integration with the rest of the world and eventually becoming Too Big To Fail like C++ is.

Better resources outside the Rust core team's reach

1. Improved support for vendored, external, and non-crates.io crates. Some of it is just a matter of documenting the workarounds to allow cargo to use local git repositories in place of networked ones. Some of it is providing official, documented registry software.
2. Improved support for third-party discussion and documentation platforms. I love Users and Internals, and I can deal with Discord, but these are platforms specifically for discussing Rust. What we need is greater presence on platforms that are dedicated to problem domains: database courses

notriddle

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

notriddle

use std::collections::VecDeque;
use std::ffi::OsString;
use std::os::windows::ffi::OsStringExt;
use std::slice;
use std::iter;
use std::ptr;

/// Implements the Windows command-line argument parsing algorithm, described at
/// <https://docs.microsoft.com/en-us/previous-versions//17w5ykft(v=vs.85)>.
///

notriddle

This is the rough implementation plan:

pick 9ae5db20d2 introduce Universe struct

We want this. =)

pick 1da0b70c57 introduce UniverseIndex into ParamEnv

Instead of adding a universe to the ParamEnv, the plan is now to add this field to the InferenceCtxt. It represents the maxixum

notriddle

// https://rust-lang.org/
use std::ffi::CStr;
use std::os::raw::{c_char, c_int};
use std::slice;
use lua_sys::lua_State;
unsafe extern "C" fn runargs(l: *mut lua_State, argv: *mut *mut c_char, n: c_int) -> c_int {
  // slices can use normal [] access, while pointers have to use the .offset method
  // so convert the pointer to a slice, because otherwise this'll be 99% .offset(i).deref().offset(0).deref()
  let args = &slice::from_raw_parts(argv, n)[1..];
  let mut iter = args.iter().cloned().map(CStr::from_ptr);

notriddle

How to use hub's PAT for user accounts

$ git config --global hub.protocol https
$ cat ~/.config/hub
github.com:
- user: notriddle
  oauth_token: [CENSORED]
  protocol: https
$ cat > ~/.netrc

notriddle

Action	Mix	Cargo
Create a project	mix new [--app APP] PATH	cargo new [--bin] PATH
Run your project	iex -S mix / mix run --no-halt / mix phoenix.server	cargo run
Get help	mix help cmd	cargo [cmd] --help
Build configuration	mix.exs	Cargo.toml
Project commands	mix COMMAND	N/A
Global add-on commands	mix archive.install PACKAGE	cargo install PACKAGE
Integrating with other languag

notriddle

### General List of Reserved Words
### Stuart P. Bentley <[email protected]>, June 4, 2013
### Michael Howell <[email protected]>, April 5, 2017

## This is a general list of words you may want to consider reserving,
## in a system where users can pick any name, in a context where the
## system may use names as well. One prominent example of a system
## where this is the case would be a site that serves pages for users,
## at their username, from the site root, like
## http://twitter.com/stuartpb . In this system, you would want to

notriddle

defmodule Enum2 do

  @type t :: Enum.t

  @doc """
  If `enum` starts with `prefix`, return true. Otherwise, return false.

  ### Examples

      iex> Enum.starts_with?([1, 2, 3], [1, 2])

notriddle

defmodule Split do
  @moduledoc """
      iex(2)> Split.split("this,is,1,way,to,do_it")
      ["this", "is", "1", "way", "to", "do", "it"]
  """
  @spec split(bitstring) :: [bitstring]
  def split(s) do
    do_split(s, [], [])
    |> Enum.map(&List.to_string/1)
    |> Enum.map(&String.reverse/1)