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Co-authored-by: Ralf Jung <post@ralfj.de>
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Do not include NUL-terminator in computed length
This PR contains just the first commit of rust-lang/rust#142579 which changes it so that the string length stored in the `Location` is the length of the `&str` rather than the length of the `&CStr`. Since most users will want the `&str` length, it seems better to optimize for that use-case.
There should be no visible changes in the behavior or API.
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Update `InterpCx::project_field` to take `FieldIdx`
As suggested by Ralf in https://github.com/rust-lang/rust/pull/142005#discussion_r2125839015
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As suggested by Ralf in 142005.
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Replace some `Option<Span>` with `Span` and use DUMMY_SP instead of None
Turns out many locations actually have a span available that we could use, so I used it
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This is useful for C/C++ APIs which expect the const char* returned
from __FILE__ or std::source_location::file_name.
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All hooks receive a `TyCtxtAt` argument.
Currently hooks can be called through `TyCtxtAt` or `TyCtxt`. In the
latter case, a `TyCtxtAt` is constructed with a dummy span and passed to
the hook.
However, in practice hooks are never called through `TyCtxtAt`, and
always receive a dummy span. (I confirmed this via code inspection, and
double-checked it by temporarily making the `TyCtxtAt` code path panic
and running all the tests.)
This commit removes all the `TyCtxtAt` machinery for hooks. All hooks
now receive `TyCtxt` instead of `TyCtxtAt`. There are two existing hooks
that use `TyCtxtAt::span`: `const_caller_location_provider` and
`try_destructure_mir_constant_for_user_output`. For both hooks the span
is always a dummy span, probably unintentionally. This dummy span use is
now explicit. If a non-dummy span is needed for these two hooks it would
be easy to add it as an extra argument because hooks are less
constrained than queries.
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`rustc_span::symbol` defines some things that are re-exported from
`rustc_span`, such as `Symbol` and `sym`. But it doesn't re-export some
closely related things such as `Ident` and `kw`. So you can do `use
rustc_span::{Symbol, sym}` but you have to do `use
rustc_span::symbol::{Ident, kw}`, which is inconsistent for no good
reason.
This commit re-exports `Ident`, `kw`, and `MacroRulesNormalizedIdent`,
and changes many `rustc_span::symbol::` qualifiers in `compiler/` to
`rustc_span::`. This is a 200+ net line of code reduction, mostly
because many files with two `use rustc_span` items can be reduced to
one.
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The previous commit updated `rustfmt.toml` appropriately. This commit is
the outcome of running `x fmt --all` with the new formatting options.
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-> CompileTimeInterpCx
to match the terms used in the shared interpreter infrastructure
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This requires exporting the interpreter macros so they can be used with
`use crate::interpret::*`.
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interpreter
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provenance rather than types
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some code
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