Introduction

Exprust is an easy to use expression parser with some light customisation options.

How to use

Exprust is held simple.
There are two available functions as well as 5 available flags for one of these functions.

• parse parses an expression and takes one or more flags as a second parameter
  parse("4+4", NONE) => 8
  
  
• evaluate on the other hand evaluates a comparision
  evaluate("4+4 = 8") => true
  

Capabilities

Operation	Example	Result (as String)
Addition	4 + 4	8
Subtraction	4 - 4	0
Multiplication	4 * 4	16
Power	4 ^ 4	256
Parenthesis	4*(4+4)	32
Absolute Values	|-4*4|	16
Functions	sin(3.14159265/2)	1
Hexadecimals	0xA15+4	2585
Binary	0b11011 * 0xa4	4428
Octals	(0o17 * 4)^0b110	46656000000
Constants	pi	3.1415926...
Degrees	sin(30°)	0.5

Note that any number here can also be a float and any operation can be paired with any other, PEMDAS is fully implemented

Functions

• floor
• ceil
• round
• trunc
• fract
• abs
• log2
• log10
• ln
• sig
• sqrt/root
• cbrt
• sin
• cos
• tan
• asin
• acos
• atan
• sinh
• cosh
• tanh
• asinh
• acosh
• atanh

Constants

The following constants are supported:

• pi
• e
• phi

Note that for the moment the actual symbols for pi and phi (π, ϕ) are not supported

Customisation

You can use a few flags to alter the output:

Flag	Effect
NONE	Returns normal output
AS_DEGREES	Arc functions usually return the result in radians, this switches it up to degrees
BIN	Wraps result in a binary number
OCT	Wraps result in an octal number
HEX	Wraps result in a hexadecimal number

Requests

Extending this is fairly simple. There are a few things such as convenience options (e.g. allowing 4(4+4) instead of 4*(4+4)) which I could add, but frankly they're not a major concern for me at the moment.
Should you have any requests though, feel free to open a new issue and I'll look into it.