evaluate

evaluate is mathematical evaluator for Lua.

Features:

• Supports variables
• Support constants like pi
• Supports standard mathematical operators
• Functions with a variable number of arguments like min
• Supports unary operators, e.g. -2 or +2

Usage Examples:

local evaluate = require(...)

-- Simple expression without variables.
evaluate("1 + 1 / 3") -- 1.3333333333333

-- A more complex expression showing support for unary operators.
evaluate("(3.4 + -4.1)/2") -- -0.35

-- Expression using functions and variables.
evaluate("sqrt(a^2 + b^2)", {
    a = 2.4;
    b = 9.253;
}) -- 9.5591845363504

-- Expression with constant.
evaluate("pi * 2") -- 6.2831853071796

-- Expression using composite function calls and constant.
evaluate("sin(cos(pi)))") -- -0.8414709848079

-- Expression using function with variable parameters.
evaluate("max(2, 4, 7, 1)") -- 7

Supported Operators

Operator	Description
+	Addition operator / Unary plus
-	Subtraction operator / Unary minus
*	Multiplication operator
/	Division operator
%	Modulo operator
^	Power operator

Supported Functions

Function
abs
acos
asin
atan
atan2
ceil
clamp
cos
cosh
deg
exp
floor
fmod
ldexp
log
max
min
noise
pow
rad
random
sign
sin
sinh
sqrt
tan
tanh

Supported Constants

Constant
pi
huge