The standard library's math

Decided

D-0055, settled by the language’s author: part of spec §18. Older text cites it as 18.55.

A compiler-carried module std::math, loaded by import std::math; the name std reserved. Chosen over the prelude, which would put Vec3 and PI in every file, and over a plain math, which a project’s own module could take. f32 vectors, Quat and Mat4, plus Vec2i/Vec3i for grids — a generic Vec3<T> would wait on associated-type projection. Methods everywhere, scalars included through Float and Integer (x.sqrt(), n.wrapping_add(m)), since without overloading a free lerp could not serve f32 and Vec3 both. Column-major matrices on column vectors, as OpenGL, GLSL and glm, so a Mat4 is projection * view * model and its floats are in the order a shader wants (§14.4). Loading by import std::math superseded by 18.57: the math is part of the one flat std module