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Reuse throw_machine_stop_str! macro.

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This commit is contained in:
Camille GILLOT 2023-09-09 16:39:21 +00:00
parent 4901893721
commit 24adf07e5f
3 changed files with 25 additions and 54 deletions
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46
compiler/rustc_mir_transform/src/const_prop.rs
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@ -32,32 +32,30 @@ const MAX_ALLOC_LIMIT: u64 = 1024;
/// Macro for machine-specific `InterpError` without allocation.
/// (These will never be shown to the user, but they help diagnose ICEs.)
macro_rules! throw_machine_stop_str {
($($tt:tt)*) => {{
// We make a new local type for it. The type itself does not carry any information,
// but its vtable (for the `MachineStopType` trait) does.
#[derive(Debug)]
struct Zst;
// Printing this type shows the desired string.
impl std::fmt::Display for Zst {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, $($tt)*)
}
pub(crate) macro throw_machine_stop_str($($tt:tt)*) {{
// We make a new local type for it. The type itself does not carry any information,
// but its vtable (for the `MachineStopType` trait) does.
#[derive(Debug)]
struct Zst;
// Printing this type shows the desired string.
impl std::fmt::Display for Zst {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, $($tt)*)
}
}
impl rustc_middle::mir::interpret::MachineStopType for Zst {
fn diagnostic_message(&self) -> rustc_errors::DiagnosticMessage {
self.to_string().into()
}
impl rustc_middle::mir::interpret::MachineStopType for Zst {
fn diagnostic_message(&self) -> rustc_errors::DiagnosticMessage {
self.to_string().into()
}
fn add_args(
self: Box<Self>,
_: &mut dyn FnMut(std::borrow::Cow<'static, str>, rustc_errors::DiagnosticArgValue<'static>),
) {}
}
throw_machine_stop!(Zst)
}};
}
fn add_args(
self: Box<Self>,
_: &mut dyn FnMut(std::borrow::Cow<'static, str>, rustc_errors::DiagnosticArgValue<'static>),
) {}
}
throw_machine_stop!(Zst)
}}
pub struct ConstProp;