rust/compiler/rustc_session/src/errors.rs, branch 1.77.2

Stop using `String` for error codes.

2024-01-28T20:41:41+00:00

Error codes are integers, but `String` is used everywhere to represent them. Gross! This commit introduces `ErrCode`, an integral newtype for error codes, replacing `String`. It also introduces a constant for every error code, e.g. `E0123`, and removes the `error_code!` macro. The constants are imported wherever used with `use rustc_errors::codes::*`. With the old code, we have three different ways to specify an error code at a use point: ``` error_code!(E0123) // macro call struct_span_code_err!(dcx, span, E0123, "msg"); // bare ident arg to macro call \#[diag(name, code = "E0123")] // string struct Diag; ``` With the new code, they all use the `E0123` constant. ``` E0123 // constant struct_span_code_err!(dcx, span, E0123, "msg"); // constant \#[diag(name, code = E0123)] // constant struct Diag; ``` The commit also changes the structure of the error code definitions: - `rustc_error_codes` now just defines a higher-order macro listing the used error codes and nothing else. - Because that's now the only thing in the `rustc_error_codes` crate, I moved it into the `lib.rs` file and removed the `error_codes.rs` file. - `rustc_errors` uses that macro to define everything, e.g. the error code constants and the `DIAGNOSTIC_TABLES`. This is in its new `codes.rs` file.

Rollup merge of #119172 - nnethercote:earlier-NulInCStr, r=petrochenkov

2024-01-18T09:34:17+00:00

Detect `NulInCStr` error earlier. By making it an `EscapeError` instead of a `LitError`. This makes it like the other errors produced when checking string literals contents, e.g. for invalid escape sequences or bare CR chars. NOTE: this means these errors are issued earlier, before expansion, which changes behaviour. It will be possible to move the check back to the later point if desired. If that happens, it's likely that all the string literal contents checks will be delayed together. One nice thing about this: the old approach had some code in `report_lit_error` to calculate the span of the nul char from a range. This code used a hardwired `+2` to account for the `c"` at the start of a C string literal, but this should have changed to a `+3` for raw C string literals to account for the `cr"`, which meant that the caret in `cr"` nul error messages was one short of where it should have been. The new approach doesn't need any of this and avoids the off-by-one error. r? ```@fee1-dead```

Add check for ui_testing via promoting parameters from `ParseSess` to `Session`

2024-01-13T17:11:13+00:00

Add suggestion to upgrade the compiler

2024-01-13T17:11:12+00:00

Detect `NulInCStr` error earlier.

2024-01-12T05:19:37+00:00

By making it an `EscapeError` instead of a `LitError`. This makes it like the other errors produced when checking string literals contents, e.g. for invalid escape sequences or bare CR chars. NOTE: this means these errors are issued earlier, before expansion, which changes behaviour. It will be possible to move the check back to the later point if desired. If that happens, it's likely that all the string literal contents checks will be delayed together. One nice thing about this: the old approach had some code in `report_lit_error` to calculate the span of the nul char from a range. This code used a hardwired `+2` to account for the `c"` at the start of a C string literal, but this should have changed to a `+3` for raw C string literals to account for the `cr"`, which meant that the caret in `cr"` nul error messages was one short of where it should have been. The new approach doesn't need any of this and avoids the off-by-one error.

Rename consuming chaining methods on `DiagnosticBuilder`.

2024-01-09T20:40:00+00:00

In #119606 I added them and used a `_mv` suffix, but that wasn't great. A `with_` prefix has three different existing uses. - Constructors, e.g. `Vec::with_capacity`. - Wrappers that provide an environment to execute some code, e.g. `with_session_globals`. - Consuming chaining methods, e.g. `Span::with_{lo,hi,ctxt}`. The third case is exactly what we want, so this commit changes `DiagnosticBuilder::foo_mv` to `DiagnosticBuilder::with_foo`. Thanks to @compiler-errors for the suggestion.

Use chaining in `DiagnosticBuilder` construction.

2024-01-08T04:43:07+00:00

To avoid the use of a mutable local variable, and because it reads more nicely.

Rename some `Diagnostic` setters.

2024-01-03T08:40:20+00:00

`Diagnostic` has 40 methods that return `&mut Self` and could be considered setters. Four of them have a `set_` prefix. This doesn't seem necessary for a type that implements the builder pattern. This commit removes the `set_` prefixes on those four methods.

Remove `ParseSess` methods that duplicate `DiagCtxt` methods.

2023-12-23T20:59:21+00:00

Also add missing `#[track_caller]` attributes to `DiagCtxt` methods as necessary to keep tests working.

Give `DiagnosticBuilder` a default type.

2023-12-23T02:23:10+00:00

`IntoDiagnostic` defaults to `ErrorGuaranteed`, because errors are the most common diagnostic level. It makes sense to do likewise for the closely-related (and much more widely used) `DiagnosticBuilder` type, letting us write `DiagnosticBuilder<'a, ErrorGuaranteed>` as just `DiagnosticBuilder<'a>`. This cuts over 200 lines of code due to many multi-line things becoming single line things.