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Migrate from failure to thiserror

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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.
This commit is contained in:
Josh Triplett
2019-10-30 07:30:20 -07:00
committed by Dan Gohman
parent 6de45ff8fc
commit 7e725cf880
9 changed files with 37 additions and 53 deletions
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8
cranelift/codegen/src/isa/mod.rs
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@@ -65,8 +65,8 @@ use crate::settings::SetResult;
use crate::timing;
use alloc::boxed::Box;
use core::fmt;
use failure_derive::Fail;
use target_lexicon::{triple, Architecture, PointerWidth, Triple};
use thiserror::Error;
#[cfg(feature = "riscv")]
mod riscv;
@@ -124,14 +124,14 @@ pub fn lookup_by_name(name: &str) -> Result<Builder, LookupError> {
}
/// Describes reason for target lookup failure
#[derive(Fail, PartialEq, Eq, Copy, Clone, Debug)]
#[derive(Error, PartialEq, Eq, Copy, Clone, Debug)]
pub enum LookupError {
/// Support for this target was disabled in the current build.
#[fail(display = "Support for this target is disabled")]
#[error("Support for this target is disabled")]
SupportDisabled,
/// Support for this target has not yet been implemented.
#[fail(display = "Support for this target has not been implemented yet")]
#[error("Support for this target has not been implemented yet")]
Unsupported,
}