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macros: move sess out of builder

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`sess` field of `SessionDiagnosticDeriveBuilder` is never actually used
in the builder's member functions, so it doesn't need to be a field.

Signed-off-by: David Wood <david.wood@huawei.com>
This commit is contained in:
David Wood 2022-06-29 16:22:27 +01:00
parent 406579ae13
commit 7f9d8480d6
1 changed files with 4 additions and 6 deletions
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10
compiler/rustc_macros/src/diagnostics/diagnostic.rs
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@ -20,6 +20,7 @@ use synstructure::{BindingInfo, Structure};
/// The central struct for constructing the `into_diagnostic` method from an annotated struct.
pub(crate) struct SessionDiagnosticDerive<'a> {
structure: Structure<'a>,
sess: syn::Ident,
builder: SessionDiagnosticDeriveBuilder,
}
@ -28,18 +29,18 @@ impl<'a> SessionDiagnosticDerive<'a> {
Self {
builder: SessionDiagnosticDeriveBuilder {
diag,
sess,
fields: build_field_mapping(&structure),
kind: None,
code: None,
slug: None,
},
sess,
structure,
}
}
pub(crate) fn into_tokens(self) -> TokenStream {
let SessionDiagnosticDerive { mut structure, mut builder } = self;
let SessionDiagnosticDerive { mut structure, sess, mut builder } = self;
let ast = structure.ast();
let attrs = &ast.attrs;
@ -96,7 +97,7 @@ impl<'a> SessionDiagnosticDerive<'a> {
.each(|field_binding| builder.generate_field_attrs_code(field_binding));
let span = ast.span().unwrap();
let (diag, sess) = (&builder.diag, &builder.sess);
let diag = &builder.diag;
let init = match (builder.kind, builder.slug) {
(None, _) => {
span_err(span, "diagnostic kind not specified")
@ -159,7 +160,6 @@ impl<'a> SessionDiagnosticDerive<'a> {
}
};
let sess = &builder.sess;
structure.gen_impl(quote! {
gen impl<'__session_diagnostic_sess> rustc_session::SessionDiagnostic<'__session_diagnostic_sess, #param_ty>
for @Self
@ -200,8 +200,6 @@ impl SessionDiagnosticKind {
/// only to be able to destructure and split `self.builder` and the `self.structure` up to avoid a
/// double mut borrow later on.
struct SessionDiagnosticDeriveBuilder {
/// Name of the session parameter that's passed in to the `as_error` method.
sess: syn::Ident,
/// The identifier to use for the generated `DiagnosticBuilder` instance.
diag: syn::Ident,