Fluent RegularExpression

The Bromix.Fluent.RegularExpression package provides a fluent API for building regular expression patterns in C#. This can be useful in situations where regular expressions are complex or difficult to maintain, or when they need to be generated dynamically based on external data inputs.

Installation via dotnet CLI

1. Open a command prompt or terminal
2. Navigate to your project directory
3. Run the following command:

dotnet add package Bromix.Fluent.RegularExpression

Usage

Here are some simple examples to get a sense of how it works. For more detailed information, you can use the wiki.

Match Year

The pattern could be \d{4} and can be written with Fluent Regular Expression like this.

using Bromix.Fluent.RegularExpression;

var pattern = Pattern
    .With()
    .Digit(Quantifier.Exactly(4))
    .ToString();

var regex = new Regex(pattern);
var match = regex.Match("2023");
Console.WriteLine(match);

Match Mail

The pattern could be ^[a-zA-Z0-9._%\-+]+@[a-zA-Z0-9._]+.[a-zA-Z]{2,}$ and can be written with Fluent Regular Expression like this.

using Bromix.Fluent.RegularExpression;

var pattern = Pattern
    .With()
    .StartOfLine()
    .CharacterClass(Quantifier.OneOrMore, cc => cc
        .Range('a', 'z')
        .Range('A', 'Z')
        .Range('0', '9')
        .OneOf('.', '_', '%', '-', '+'))
    .Literal("@")
    .CharacterClass(Quantifier.OneOrMore, cc => cc
        .Range('a', 'z')
        .Range('A', 'Z')
        .Range('0', '9')
        .OneOf('.', '_'))
    .Literal(".")
    .CharacterClass(Quantifier.AtLeast(2), cc => cc
        .Range('a', 'z')
        .Range('A', 'Z'))
    .EndOfLine()
    .ToString();

    var regex = new Regex(pattern);
    var match = regex.Match(input);
    Console.WriteLine(match.Success);