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Rollup merge of #82607 - bjorn3:frame_loc_getter, r=RalfJung

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Add a getter for Frame.loc

This is necessary for Priroda.

For context see https://rust-lang.zulipchat.com/#narrow/stream/146212-t-compiler.2Fconst-eval/topic/Frame.3A.3Aloc.20no.20longer.20public/near/228070266 and oli-obk/priroda#27.

cc `@DJMcNab`

r? `@RalfJung`
This commit is contained in:
Dylan DPC 2021-02-27 21:56:25 +01:00 committed by GitHub
commit 7847f690fd
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10
compiler/rustc_mir/src/interpret/eval_context.rs
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@ -226,6 +226,16 @@ impl<'mir, 'tcx, Tag> Frame<'mir, 'tcx, Tag> {
}
impl<'mir, 'tcx, Tag, Extra> Frame<'mir, 'tcx, Tag, Extra> {
/// Get the current location within the Frame.
///
/// If this is `Err`, we are not currently executing any particular statement in
/// this frame (can happen e.g. during frame initialization, and during unwinding on
/// frames without cleanup code).
/// We basically abuse `Result` as `Either`.
pub fn current_loc(&self) -> Result<mir::Location, Span> {
self.loc
}
/// Return the `SourceInfo` of the current instruction.
pub fn current_source_info(&self) -> Option<&mir::SourceInfo> {
self.loc.ok().map(|loc| self.body.source_info(loc))