mtl-rs 0.2.2

Rust bindings for Apple's Metal API
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use objc2::{Encode, Encoding, RefEncode};
use objc2_foundation::NSErrorDomain;

#[repr(u64)]
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord)]
pub enum MTLLibraryError {
    Unsupported = 1,
    Internal = 2,
    CompileFailure = 3,
    CompileWarning = 4,
    FunctionNotFound = 5,
    FileNotFound = 6,
}

unsafe impl Encode for MTLLibraryError {
    const ENCODING: Encoding = u64::ENCODING;
}
unsafe impl RefEncode for MTLLibraryError {
    const ENCODING_REF: Encoding = Encoding::Pointer(&Self::ENCODING);
}

unsafe extern "C" {
    static MTLLibraryErrorDomain: &'static NSErrorDomain;
}

/// Returns the error domain for Metal library compilation and loading errors.
#[inline]
pub fn library_error_domain() -> String {
    unsafe { MTLLibraryErrorDomain }.to_string()
}