Mol_regexp NPM

$mol_regexp

Builds composable regular expression, which compiles to native RegExp. And generates a matching string for it.

Instance API

// [ 'foo', 'bar' ]
'foo bar'.match( word )

// [ 'foo', 'bar' ]
for( const token of 'foo bar'.matchAll( word ) ) {
	
	// Full matched substring
	token[0]
	
	// Catched subgroups by names like `{ foo: 'bar', ... }`
	// `undefined` when token doesn't matched.
	token.groups
	
}

// "foo@example.org"
mail.generate({
	dot_atom: 'foo',
	domain: 'example.org',
})

// Error: "Wrong param: dot_atom=jin."
mail.generate({
	dot_atom: 'jin.',
	domain: 'example.org',
})

// "jin: male"
sexism.generate({
	name: 'jin',
	male: true,
})

Build Instance

// /:\)/gsu
const smile = $mol_regexp.from( ':)' )

| Matches |-------- | :)

// /hello/gimsu
const hello = $mol_regexp.from( 'hello', {
	ignoreCase: true,
	multiline: true,
} )

| Matches |-------- | hello | HELLO

// /.../gmsu
const triplet = $mol_regexp.from(
	$mol_regexp.from(
		/.../,
		{ ignoreCase: true },
	),
	{ multiline: true },
)

| Matches |-------- | any | a=+

// /\u{20}/gsu
const space = $mol_regexp.from( 32 )

// /[,;\u{20}\u{61}-\u{7a}\d]/gsu
const tags = $mol_regexp.char_only(
	',;', // chars
	32, // code of space
	$mol_regexp.char_range( 0x61, 0x7A ), // a-z
	$mol_regexp.decimal_only, // 0-9
)

| Matches |-------- | foo, bar | 0;1;10

// /[^,;\u{20}\u{61}-\u{7a}\d]/gsu
const tags = $mol_regexp.char_except(
	',;', // chars
	32, // code of space
	$mol_regexp.char_range( 0x61, 0x7A ), // a-z
	$mol_regexp.decimal_only, // 0-9
)

| Matches |-------- | *=+ | ABC

// /\p{Script=Cyrillic}/gsu
$mol_regexp.unicode_only( 'Script', 'Cyrillic' )

// /\P{Script=Cyrillic}/gsu
$mol_regexp.unicode_except( 'Script', 'Cyrillic' )

// /\p{Hex_Digit}/gsu
$mol_regexp.unicode_only( 'Hex_Digit' )

// /\P{Hex_Digit}/gsu
$mol_regexp.unicode_except( 'Hex_Digit' )

// Regexp: /(?:\n){1,2}?/gsu
const para_sep = $mol_regexp.repeat( '\n', 1, 2 )

| Matches |-------- | \n | \n\n

// /(?:\d){2,4}/
const year = $mol_regexp.repeat_greedy( $mol_regexp.decimal_only, 2, 4 )

| Matches |-------- | 95 | 2020

// /(?:\d){2,4}(?:\.\.(?:\d){2,4}){0,1}/gsu
const life_years = $mol_regexp.from([ year, [ '..', year ] ])

| Matches |-------- | 95..99 | 2020

const from = year
const to = year

// /(?:((?:\d){2,4}))(?:\.\.(?:((?:\d){2,4}))){0,1}/gsu
const life_years = $mol_regexp.from([ {from}, [ '..', {to} ] ])

Matches	from	to
95..99	95	99
2020	2020

enum Sex {
	male = 'male',
	female = 'female',
}

// /(?:((?:(male)|(female))))/gsu
const sex = $mol_regexp.from( {Sex} )

// { Sex: string, male: string, female: string } | undefined
const res = [ ... text.matchAll( sex ) ][0].groups

Matches	Sex	male	female
male	male	male
female	female		female

const {
	begin, end,
	char_only, char_range,
	latin_only, slash_back,
	repeat_greedy, from,
} = $mol_regexp

const atom_char = char_only( latin_only, "!#$%&'*+/=?^`{|}~-" )
const atom = repeat_greedy( atom_char, 1 )
const dot_atom = from([ atom, repeat_greedy([ '.', atom ]) ])

const name_letter = char_only(
	char_range( 0x01, 0x08 ),
	0x0b, 0x0c,
	char_range( 0x0e, 0x1f ),
	0x21,
	char_range( 0x23, 0x5b ),
	char_range( 0x5d, 0x7f ),
)

const quoted_pair = from([
	slash_back,
	char_only(
		char_range( 0x01, 0x09 ),
		0x0b, 0x0c,
		char_range( 0x0e, 0x7f ),
	)
])

const name = repeat_greedy({ name_letter, quoted_pair })
const quoted_name = from([ '"', {name}, '"' ])

const local_part = from({ dot_atom, quoted_name })
const domain = dot_atom

const mail = from([ begin, local_part, '@', {domain}, end ])

Matches	domain	dot_atom	name	name_letter	quoted_name	quoted_pair
a.b@c.d	c.d	a.b
"a\n"@c.d	c.d		a\n		"a\n"	\n

Usage from NPM

npm install mol_regexp

import { $mol_regexp } from 'mol_regexp'

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$mol_regexp

Instance API

All Matched Substrings

Tokenize String

Generate New String

Substitution

Validation

Default Value from Pattern

Build Instance

Fixed String

Flags

From Other Regexp

Char by code point

Inclusive char class

Exclusive char class

Unicode classes

Repeat non-greedy

Repeat greedy

Sequence and optional sequence

Catch groups

Сatch variants

Complex example

Usage from NPM