//! Provides a macro and type for including SPIR-V shaders in const data.
//!
//! In an ideal world, a shader will be compiled at build-time directly into the executable. This
//! is opposed to the typical method of including a shader, which reads a GLSL source code file
//! from the file system at start, compiles it, and sends it to the GPU. That process adds a
//! non-trivial amount of time to startup, and additional error handling code at runtime.
//!
//! This macro moves all of that complexity to build-time. At least for the SPIR-V part of the
//! shader pipeline. (`gfx-hal` backends have their own SPIR-V-to-native compilers at runtime.)