A Regex library that uses Regex, made for Regex, in Regex. Ignore CodeFactor in saying anything above A. This is just horrible.

You might have seen RegexMath, a math engine written in Regex. Now, this is a project that aims to replace most of the common string functionality (or anything that can be done with strings/chars/int turned to strings) into Regex. (In the process of merging)

"Foo Bar".IndexOfRegex("a");
// 5

```cs
"Foo Bar".SubstringRegex(1, 4);
// oo B

"   Foo Bar    ".Trim()
// Foo Bar

RegexMath.Evaluate("5+(-5(0.431e4*(5)(4)))*3.430e2(.509194e-5)-40.05245");
// -787.80921602

Regexmath.Evaluate("sqrt(5)+5^2PI+H_3/log(e, 3)");
// 82.444656232727

var input = "broken";
RegexMath.TryEvaluate(input, our var result);
// False

It tries to copy some of the exceptions and behavior present in the native implementation. I try to, but it will take awhile to make it quite exact. After all, I don't understand code so optimized (after all, I am using Regex for a library, how optimized do I need to be?)

• Substring
• Trim
• TrimStart/TrimEnd

• IndexOf
• LastIndexOf
• IndexOfAny
• LastIndexOfAny
• StartsWith/EndsWith
• Contains

^, **, *, /, %, +, and -

PI and E

• sqrt(x)
• cbrt(x)
• root(x, y)
• log_x(y) or log(x, y)
• min(x, y) or max(x, y)

and a lot more...

• Modulo
• Remainder
• Bitshift

• Factorial on non-natural numbers
• Euler Beta functions
• Error functions
• Sigmoid: Logistic functions
• Gamma functions
• Harmonic numbers
• Trigonometry

• Split
• Numerics
• Padding

• Summation in the form of Σ/sum/sigma[i=1, 6][3i + 4]
• Product in the form of Π/prod/product[i=1, 3][3i + 4]
• Variable substitution
• Differential equations
• Numerical stability
• Conversion between radian, degree, and grad

Some of the functions can be found in Math.Net or Typing Math as text