haxscramper haxscramper

Moved to https://github.com/haxscramper/site/blob/master/nimskull-notes.org

Cleaning up existing tests

There are many ideas of what we could change or where to go next, but those are often poorly thought out. The sheer volume of what we don't know about the existing system, good or bad, is so large we're working in the dark. This is a blindspot induced by the current state of the code base.

What we do know, with great certainty, is that we need tests that not only test things but also:

teach the reader
are a useful reasoning tools
remember decisions of the past
help uncover lost ideas
shine a light on dark corners and issues

Nim fusion

Starting from this version you can run nim fusion to install or update the fusion package - an extension to the nim stdlib with some additional modules.

Currently, the following modules are present:

fusion/smartptrs - C++-like unique/shared pointers
fusion/btreetables - sorted associative containers
fusion/matching - pattern matching implementation using nim macros
introduction article: https://nim-lang.org/blog/2021/01/11/pattern-matching.html

Base C++ class cppbase.cpp

#pragma once

#include <stdio.h>

struct CppBase {
  virtual void baseMethod(int arg) {
    printf("arg from nim - %d -\n", arg);

Pattern matching in nim

Introduction

New pattern matcing library introduces support for two very useful concepts: pattern matching and object destructuring.

Nim features you didn’t know and don’t need to

Can put basically anything as identifier

Technically this is just function call using method call syntax - × is treated as regular identifier (like someFunction) and it is perfectly legal to call obj .someFunction arg. So a .× b is not really different in that regard.

proc ×(a, b: set[char]): seq[(char, char)] =
  for aIt in a:
    for bIt in b:

	TU(records=[],
	enums=[Enum(fields=[EnumField(name='GIT_FEATURE_THREADS', value=''),
	EnumField(name='GIT_FEATURE_HTTPS', value=''),
	EnumField(name='GIT_FEATURE_SSH', value=''),
	EnumField(name='GIT_FEATURE_NSEC', value='')],
	name='',
	base=QualType(name='', spaces=[], parameters=[], is_const=False, is_ref=False, is_pointer=False, is_function_pointer=False, is_method_pointer=False, is_namespace=False, dbg_origin=''),
	doc=''),
	Enum(fields=[EnumField(name='GIT_OPT_GET_MWINDOW_SIZE', value=''),
	EnumField(name='GIT_OPT_SET_MWINDOW_SIZE', value=''),

	#!/usr/bin/env python

	import yaml
	import textwrap
	from typing import *


	def indent(text, amount, ch=" "):
	padding = amount * ch
	return "".join(padding + line for line in text.splitlines(True))

	import asynchttpserver, asyncdispatch, os


	proc handler(req: Request) {.async.} =
	echo "request for path ", req.url.path
	let cwd = getCurrentDir()
	let file = cwd / req.url.path
	if fileExists(file):
	await req.respond(Http200, file.readFile())
	else: