5d9dfbd08f
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.
25 lines
556 B
Rust
25 lines
556 B
Rust
// rustc-env:CARGO_CRATE_NAME=rustc_dummy
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#![feature(rustc_private)]
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#![crate_type = "lib"]
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extern crate rustc_span;
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use rustc_span::symbol::Ident;
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use rustc_span::Span;
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extern crate rustc_macros;
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use rustc_macros::{Diagnostic, LintDiagnostic, Subdiagnostic};
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extern crate rustc_middle;
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use rustc_middle::ty::Ty;
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extern crate rustc_errors;
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use rustc_errors::{Applicability, MultiSpan};
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extern crate rustc_session;
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#[derive(Diagnostic)]
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#[diag(compiletest_example, code = 0123)]
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//~^ ERROR diagnostic slug and crate name do not match
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struct Hello {}
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