Add - Math module for std lib

[EvanPerreau]

Rounding

• ceil(x: Num): Num - rounds up to the nearest integer
• floor(x: Num): Num - rounds down to the nearest
• round(x: Num): Num - rounds to the nearest integer

Absolute and sign

• abs(x: Num): Num - absolute value
• sign(x: Num): Num - sign function, returns -1, 0, or 1 depending on the sign of x

Min / Max

• min(a: Num, b: Num): Num
• max(a: Num, b: Num): Num

Power, root, exponential, logarithms and trigonometric

These can be easily evaluated using bc with flag -l

• pow(base: Num, exponent: Num): Num - power function
• sqrt(x: Num): Num - square root
• exp(x: Num): Num - exponential function
• log(x: Num): Num - natural logarithm
• log10(x: Num): Num - base-10 logarithm
• sin(x: Num): Num - sine
• cos(x: Num): Num - cosine
• tan(x: Num): Num - tangent

[EvanPerreau]

It's because actually, the pull request Split stdlib into submodules isn't merge, for unit test, I need to put all functions in main.ab, but for help us to split stdlib in future, I also put all functions in math.ab

[b1ek]

then its probably better to wait for a decicion on #152 and then merge this one

[EvanPerreau]

yes, ok !

[UrbanCoffee]

Hello. I just wanted to add that the implementations of floor and ceil are not entirely correct. They return the wrong value for negative inputs. Additionally, if the input x is an integer, ceil returns x+1 rather than just x.

[Ph0enixKM]

We'll have to write a separate file for testing the math library. We need a lot of good tests to keep this working

[b1ek]

We'll have to write a separate file for testing the math library. We need a lot of good tests to keep this working

that should probably be as a submod to stlib.rs, like stdlib/math.rs ig

[EvanPerreau]

Hello. I just wanted to add that the implementations of floor and ceil are not entirely correct. They return the wrong value for negative inputs. Additionally, if the input x is an integer, ceil returns x+1 rather than just x.

Hello, I fix this bug :)