89 lines
2.4 KiB
Rust
89 lines
2.4 KiB
Rust
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#![allow(clippy::iter_cloned_collect, clippy::uninlined_format_args)]
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use std::fmt::Display;
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use thiserror::Error;
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// Some of the elaborate cases from the rcc codebase, which is a C compiler in
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// Rust. https://github.com/jyn514/rcc/blob/0.8.0/src/data/error.rs
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#[derive(Error, Debug)]
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pub enum CompilerError {
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#[error("cannot shift {} by {maximum} or more bits (got {current})", if *.is_left { "left" } else { "right" })]
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TooManyShiftBits {
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is_left: bool,
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maximum: u64,
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current: u64,
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},
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#[error("#error {}", (.0).iter().copied().collect::<Vec<_>>().join(" "))]
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User(Vec<&'static str>),
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#[error("overflow while parsing {}integer literal",
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if let Some(signed) = .is_signed {
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if *signed { "signed "} else { "unsigned "}
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} else {
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""
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}
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)]
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IntegerOverflow { is_signed: Option<bool> },
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#[error("overflow while parsing {}integer literal", match .is_signed {
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Some(true) => "signed ",
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Some(false) => "unsigned ",
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None => "",
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})]
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IntegerOverflow2 { is_signed: Option<bool> },
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}
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// Examples drawn from Rustup.
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#[derive(Error, Debug)]
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pub enum RustupError {
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#[error(
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"toolchain '{name}' does not contain component {component}{}",
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.suggestion
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.as_ref()
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.map_or_else(String::new, |s| format!("; did you mean '{}'?", s)),
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)]
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UnknownComponent {
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name: String,
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component: String,
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suggestion: Option<String>,
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},
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}
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fn assert<T: Display>(expected: &str, value: T) {
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assert_eq!(expected, value.to_string());
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}
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#[test]
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fn test_rcc() {
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assert(
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"cannot shift left by 32 or more bits (got 50)",
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CompilerError::TooManyShiftBits {
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is_left: true,
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maximum: 32,
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current: 50,
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},
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);
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assert("#error A B C", CompilerError::User(vec!["A", "B", "C"]));
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assert(
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"overflow while parsing signed integer literal",
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CompilerError::IntegerOverflow {
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is_signed: Some(true),
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},
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);
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}
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#[test]
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fn test_rustup() {
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assert(
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"toolchain 'nightly' does not contain component clipy; did you mean 'clippy'?",
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RustupError::UnknownComponent {
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name: "nightly".to_owned(),
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component: "clipy".to_owned(),
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suggestion: Some("clippy".to_owned()),
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},
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);
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}
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