7e725cf880
The failure crate invents its own traits that don't use std::error::Error (because failure predates certain features added to Error); this prevents using ? on an error from failure in a function using Error. The thiserror crate integrates with the standard Error trait instead.
37 lines
1.3 KiB
Rust
37 lines
1.3 KiB
Rust
//! Result and error types representing the outcome of compiling a function.
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use crate::verifier::VerifierErrors;
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use thiserror::Error;
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/// A compilation error.
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///
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/// When Cranelift fails to compile a function, it will return one of these error codes.
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#[derive(Error, Debug, PartialEq, Eq)]
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pub enum CodegenError {
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/// A list of IR verifier errors.
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///
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/// This always represents a bug, either in the code that generated IR for Cranelift, or a bug
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/// in Cranelift itself.
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#[error("Verifier errors")]
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Verifier(#[from] VerifierErrors),
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/// An implementation limit was exceeded.
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///
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/// Cranelift can compile very large and complicated functions, but the [implementation has
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/// limits][limits] that cause compilation to fail when they are exceeded.
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///
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/// [limits]: https://cranelift.readthedocs.io/en/latest/ir.html#implementation-limits
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#[error("Implementation limit exceeded")]
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ImplLimitExceeded,
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/// The code size for the function is too large.
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///
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/// Different target ISAs may impose a limit on the size of a compiled function. If that limit
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/// is exceeded, compilation fails.
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#[error("Code for function is too large")]
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CodeTooLarge,
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}
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/// A convenient alias for a `Result` that uses `CodegenError` as the error type.
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pub type CodegenResult<T> = Result<T, CodegenError>;
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