Behrang Nevii Chubek

Understanding Grammar Notations Used in PLT Textbooks ('Cheatsheet')

Chubak Bidpaa (Based on the 3rd edition of TDB, pages 198-199)

PLT textboks often use Greek and Latin letters to denote grammatic notations such as terminal, non-terminals, and other such concepts. For a beginner (like me!) it could be rather overwhelming. So I created this cheatsheet to be used as reference for any curious person or learners, alike.

Categories

clemore_virtdev.c is the Linux virtual keyboard driver for my key remapper, Clemore.

After compiling it with this Makefile:

obj-m += clemore_virtdev.o

all:
	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules

I made this function to be able to render manpages with bat -lman --pager=most, but compile it with GROFF instead of mandoc(1).

It's very easy to prepare mandoc(1)-compiled manpages with bat(1). All you have to do is to filter it through col -xb.

But GROFF uses ESC[..;word ESC[... sequences (aka ANSI) so it's a bit hard.

My Fish function deansify takes a file either via STDIN or --file/-f and da-ANSI-fies it tou STDOUT.

Pretty simple. Now you can do zcat (man -w <manpage>) | groff -man -Tascii | deansify | bat -lman --pager=most (I highly recommend using most(1) as your default pager!).

	#include <ctype.h>
	#include <stdbool.h>
	#include <stdint.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <uchar.h>

	#define FNV_32_PRIME 0x1000193U
	#define FNV_32_OFFSET_BASIS 0x811c9dc5U

	#include <stdarg.h>
	#include <stdbool.h>
	#include <stdint.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>

	#define OP_Add 1
	#define OP_And 2
	#define OP_Alloc 3

	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <unistd.h>

	#include "object.h"
	#include "symtbl.h"

	symtbl_t *
	symtbl_new (size_t max_buckets)

	package lexer

	import (
	"fmt"
	"patina-lang/internal/token"
	"strings"
	"unicode/utf8"
	)

	const EOF rune = -1

	(* Core Structure *)
	HelpFile = FirstLine, { Section \| FreeContent }, [ Modeline ] ;
	FirstLine = TagDef, Tab, Description, Newline ;
	Section = Heading, SeparatorLine, { Block } ;
	FreeContent = { Block } ;

	(* Headings and Separators *)
	Heading = TextLine ;
	SeparatorLine = "=", "=", "=", { "=" }, Newline ; (* Min 3 '=' *)
	ColumnHeading = Text, " ~", Newline ;

	#define PHI 0x585f14dULL

	static inline uint32_t
	_skiena_hash32 (const uint8_t *msg, size_t msg_len)
	{
	static uint16_t rand_map[UCHAR_MAX] = {
	0x144, 0x1ab, 0x13c, 0x028, 0x1c3, 0x107, 0x193, 0x174, 0x00c, 0x160,
	0x142, 0x0fe, 0x01f, 0x1b0, 0x198, 0x160, 0x10f, 0x185, 0x015, 0x051,
	0x057, 0x138, 0x17e, 0x199, 0x1f5, 0x01e, 0x1f2, 0x01f, 0x174, 0x0b7,
	0x085, 0x0a5, 0x200, 0x14d, 0x188, 0x168, 0x1e4, 0x1ef, 0x15c, 0x14e,

	" Superscript
	iabbrev <buffer> ^0 ⁰
	iabbrev <buffer> ^1 ¹
	iabbrev <buffer> ^2 ²
	iabbrev <buffer> ^3 ³
	iabbrev <buffer> ^4 ⁴
	iabbrev <buffer> ^5 ⁵
	iabbrev <buffer> ^6 ⁶
	iabbrev <buffer> ^7 ⁷
	iabbrev <buffer> ^8 ⁸