Emik.Analyzers.Matches 1.2.1

Emik.Analyzers.Matches

Analyzer for compile-time parameter validation with the power of regex.

This project has a dependency to Emik.Morsels, if you are building this project, refer to its README first.

• Example
• Lints
• Contribute
• License

Example

[StringSyntax(StringSyntaxAttribute.Regex)]
const string ValidatorQuery = @"^\d{2}$";

[GeneratedRegex(ValidatorQuery)]
partial Regex Validator();

byte? Test([Emik.Match(ValidatorQuery)] string x)
{
    if (!Validator().IsMatch(out var capture)) // OK
        return null;

    if (!Validator().IsMatch(out _, out var captureThatDoesNotExist)) // Error
        return null;

    if (!new Regex(x).IsMatch(out _)) // Warning: Not a constant
        return null;

    return byte.Parse(capture);
}

string TestTyped(X x) => x.Value;

record X(string Value)
{
    public static implicit operator X([Match(@"^\w{3}$")] string value) => new(value);
}

Test("12"); // OK
Test("34"); // OK
TestTyped("foo"); // OK
TestTyped("bar"); // OK

Test("1"); // Error
Test("foobar"); // Error
TestTyped("12"); // Error
TestTyped("food"); // Error

Test(bool.FalseString); // Warning: Not a constant
TestTyped(bool.TrueString); // Warning: Not a constant

Lints

Contribute

Issues and pull requests are welcome to help this repository be the best it can be.

License

This repository falls under the MPL-2 license.