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-rw-r--r--compiler/rustc_macros/src/diagnostics/subdiagnostic.rs740
1 files changed, 478 insertions, 262 deletions
diff --git a/compiler/rustc_macros/src/diagnostics/subdiagnostic.rs b/compiler/rustc_macros/src/diagnostics/subdiagnostic.rs
index edf4dbed9..dce5d3cfb 100644
--- a/compiler/rustc_macros/src/diagnostics/subdiagnostic.rs
+++ b/compiler/rustc_macros/src/diagnostics/subdiagnostic.rs
@@ -12,7 +12,7 @@ use quote::{format_ident, quote};
use std::collections::HashMap;
use std::fmt;
use std::str::FromStr;
-use syn::{parse_quote, spanned::Spanned, Meta, MetaList, MetaNameValue, NestedMeta, Path};
+use syn::{spanned::Spanned, Attribute, Meta, MetaList, MetaNameValue, NestedMeta, Path};
use synstructure::{BindingInfo, Structure, VariantInfo};
/// Which kind of suggestion is being created?
@@ -28,8 +28,41 @@ enum SubdiagnosticSuggestionKind {
Verbose,
}
+impl FromStr for SubdiagnosticSuggestionKind {
+ type Err = ();
+
+ fn from_str(s: &str) -> Result<Self, Self::Err> {
+ match s {
+ "" => Ok(SubdiagnosticSuggestionKind::Normal),
+ "_short" => Ok(SubdiagnosticSuggestionKind::Short),
+ "_hidden" => Ok(SubdiagnosticSuggestionKind::Hidden),
+ "_verbose" => Ok(SubdiagnosticSuggestionKind::Verbose),
+ _ => Err(()),
+ }
+ }
+}
+
+impl SubdiagnosticSuggestionKind {
+ pub fn to_suggestion_style(&self) -> TokenStream {
+ match self {
+ SubdiagnosticSuggestionKind::Normal => {
+ quote! { rustc_errors::SuggestionStyle::ShowCode }
+ }
+ SubdiagnosticSuggestionKind::Short => {
+ quote! { rustc_errors::SuggestionStyle::HideCodeInline }
+ }
+ SubdiagnosticSuggestionKind::Hidden => {
+ quote! { rustc_errors::SuggestionStyle::HideCodeAlways }
+ }
+ SubdiagnosticSuggestionKind::Verbose => {
+ quote! { rustc_errors::SuggestionStyle::ShowAlways }
+ }
+ }
+ }
+}
+
/// Which kind of subdiagnostic is being created from a variant?
-#[derive(Clone, Copy)]
+#[derive(Clone)]
enum SubdiagnosticKind {
/// `#[label(...)]`
Label,
@@ -37,34 +70,12 @@ enum SubdiagnosticKind {
Note,
/// `#[help(...)]`
Help,
- /// `#[warn_(...)]`
+ /// `#[warning(...)]`
Warn,
/// `#[suggestion{,_short,_hidden,_verbose}]`
- Suggestion(SubdiagnosticSuggestionKind),
-}
-
-impl FromStr for SubdiagnosticKind {
- type Err = ();
-
- fn from_str(s: &str) -> Result<Self, Self::Err> {
- match s {
- "label" => Ok(SubdiagnosticKind::Label),
- "note" => Ok(SubdiagnosticKind::Note),
- "help" => Ok(SubdiagnosticKind::Help),
- "warn_" => Ok(SubdiagnosticKind::Warn),
- "suggestion" => Ok(SubdiagnosticKind::Suggestion(SubdiagnosticSuggestionKind::Normal)),
- "suggestion_short" => {
- Ok(SubdiagnosticKind::Suggestion(SubdiagnosticSuggestionKind::Short))
- }
- "suggestion_hidden" => {
- Ok(SubdiagnosticKind::Suggestion(SubdiagnosticSuggestionKind::Hidden))
- }
- "suggestion_verbose" => {
- Ok(SubdiagnosticKind::Suggestion(SubdiagnosticSuggestionKind::Verbose))
- }
- _ => Err(()),
- }
- }
+ Suggestion { suggestion_kind: SubdiagnosticSuggestionKind, code: TokenStream },
+ /// `#[multipart_suggestion{,_short,_hidden,_verbose}]`
+ MultipartSuggestion { suggestion_kind: SubdiagnosticSuggestionKind },
}
impl quote::IdentFragment for SubdiagnosticKind {
@@ -74,17 +85,9 @@ impl quote::IdentFragment for SubdiagnosticKind {
SubdiagnosticKind::Note => write!(f, "note"),
SubdiagnosticKind::Help => write!(f, "help"),
SubdiagnosticKind::Warn => write!(f, "warn"),
- SubdiagnosticKind::Suggestion(SubdiagnosticSuggestionKind::Normal) => {
- write!(f, "suggestion")
- }
- SubdiagnosticKind::Suggestion(SubdiagnosticSuggestionKind::Short) => {
- write!(f, "suggestion_short")
- }
- SubdiagnosticKind::Suggestion(SubdiagnosticSuggestionKind::Hidden) => {
- write!(f, "suggestion_hidden")
- }
- SubdiagnosticKind::Suggestion(SubdiagnosticSuggestionKind::Verbose) => {
- write!(f, "suggestion_verbose")
+ SubdiagnosticKind::Suggestion { .. } => write!(f, "suggestion_with_style"),
+ SubdiagnosticKind::MultipartSuggestion { .. } => {
+ write!(f, "multipart_suggestion_with_style")
}
}
}
@@ -148,11 +151,9 @@ impl<'a> SessionSubdiagnosticDerive<'a> {
variant,
span,
fields: fields_map,
- kind: None,
- slug: None,
- code: None,
span_field: None,
applicability: None,
+ has_suggestion_parts: false,
};
builder.into_tokens().unwrap_or_else(|v| v.to_compile_error())
});
@@ -193,21 +194,15 @@ struct SessionSubdiagnosticDeriveBuilder<'a> {
/// derive builder.
fields: HashMap<String, TokenStream>,
- /// Subdiagnostic kind of the type/variant.
- kind: Option<(SubdiagnosticKind, proc_macro::Span)>,
-
- /// Slug of the subdiagnostic - corresponds to the Fluent identifier for the message - from the
- /// `#[kind(slug)]` attribute on the type or variant.
- slug: Option<(Path, proc_macro::Span)>,
- /// If a suggestion, the code to suggest as a replacement - from the `#[kind(code = "...")]`
- /// attribute on the type or variant.
- code: Option<(TokenStream, proc_macro::Span)>,
-
/// Identifier for the binding to the `#[primary_span]` field.
span_field: Option<(proc_macro2::Ident, proc_macro::Span)>,
/// If a suggestion, the identifier for the binding to the `#[applicability]` field or a
/// `rustc_errors::Applicability::*` variant directly.
applicability: Option<(TokenStream, proc_macro::Span)>,
+
+ /// Set to true when a `#[suggestion_part]` field is encountered, used to generate an error
+ /// during finalization if still `false`.
+ has_suggestion_parts: bool,
}
impl<'a> HasFieldMap for SessionSubdiagnosticDeriveBuilder<'a> {
@@ -216,8 +211,40 @@ impl<'a> HasFieldMap for SessionSubdiagnosticDeriveBuilder<'a> {
}
}
+/// Provides frequently-needed information about the diagnostic kinds being derived for this type.
+#[derive(Clone, Copy, Debug)]
+struct KindsStatistics {
+ has_multipart_suggestion: bool,
+ all_multipart_suggestions: bool,
+ has_normal_suggestion: bool,
+}
+
+impl<'a> FromIterator<&'a SubdiagnosticKind> for KindsStatistics {
+ fn from_iter<T: IntoIterator<Item = &'a SubdiagnosticKind>>(kinds: T) -> Self {
+ let mut ret = Self {
+ has_multipart_suggestion: false,
+ all_multipart_suggestions: true,
+ has_normal_suggestion: false,
+ };
+ for kind in kinds {
+ if let SubdiagnosticKind::MultipartSuggestion { .. } = kind {
+ ret.has_multipart_suggestion = true;
+ } else {
+ ret.all_multipart_suggestions = false;
+ }
+
+ if let SubdiagnosticKind::Suggestion { .. } = kind {
+ ret.has_normal_suggestion = true;
+ }
+ }
+ ret
+ }
+}
+
impl<'a> SessionSubdiagnosticDeriveBuilder<'a> {
- fn identify_kind(&mut self) -> Result<(), DiagnosticDeriveError> {
+ fn identify_kind(&mut self) -> Result<Vec<(SubdiagnosticKind, Path)>, DiagnosticDeriveError> {
+ let mut kind_slugs = vec![];
+
for attr in self.variant.ast().attrs {
let span = attr.span().unwrap();
@@ -225,116 +252,121 @@ impl<'a> SessionSubdiagnosticDeriveBuilder<'a> {
let name = name.as_str();
let meta = attr.parse_meta()?;
- let kind = match meta {
- Meta::List(MetaList { ref nested, .. }) => {
- let mut nested_iter = nested.into_iter();
- if let Some(nested_attr) = nested_iter.next() {
- match nested_attr {
- NestedMeta::Meta(Meta::Path(path)) => {
- self.slug.set_once((path.clone(), span));
- }
- NestedMeta::Meta(meta @ Meta::NameValue(_))
- if matches!(
- meta.path().segments.last().unwrap().ident.to_string().as_str(),
- "code" | "applicability"
- ) =>
- {
- // don't error for valid follow-up attributes
- }
- nested_attr => {
- throw_invalid_nested_attr!(attr, &nested_attr, |diag| {
- diag.help(
- "first argument of the attribute should be the diagnostic \
- slug",
- )
- })
- }
- };
- }
+ let Meta::List(MetaList { ref nested, .. }) = meta else {
+ throw_invalid_attr!(attr, &meta);
+ };
- for nested_attr in nested_iter {
- let meta = match nested_attr {
- NestedMeta::Meta(ref meta) => meta,
- _ => throw_invalid_nested_attr!(attr, &nested_attr),
- };
-
- let span = meta.span().unwrap();
- let nested_name = meta.path().segments.last().unwrap().ident.to_string();
- let nested_name = nested_name.as_str();
-
- match meta {
- Meta::NameValue(MetaNameValue { lit: syn::Lit::Str(s), .. }) => {
- match nested_name {
- "code" => {
- let formatted_str = self.build_format(&s.value(), s.span());
- self.code.set_once((formatted_str, span));
- }
- "applicability" => {
- let value = match Applicability::from_str(&s.value()) {
- Ok(v) => v,
- Err(()) => {
- span_err(span, "invalid applicability").emit();
- Applicability::Unspecified
- }
- };
- self.applicability.set_once((quote! { #value }, span));
- }
- _ => throw_invalid_nested_attr!(attr, &nested_attr, |diag| {
- diag.help(
- "only `code` and `applicability` are valid nested \
- attributes",
- )
- }),
- }
- }
- _ => throw_invalid_nested_attr!(attr, &nested_attr, |diag| {
- if matches!(meta, Meta::Path(_)) {
- diag.help(
- "a diagnostic slug must be the first argument to the \
- attribute",
- )
- } else {
- diag
- }
- }),
- }
+ let mut kind = match name {
+ "label" => SubdiagnosticKind::Label,
+ "note" => SubdiagnosticKind::Note,
+ "help" => SubdiagnosticKind::Help,
+ "warning" => SubdiagnosticKind::Warn,
+ _ => {
+ if let Some(suggestion_kind) =
+ name.strip_prefix("suggestion").and_then(|s| s.parse().ok())
+ {
+ SubdiagnosticKind::Suggestion { suggestion_kind, code: TokenStream::new() }
+ } else if let Some(suggestion_kind) =
+ name.strip_prefix("multipart_suggestion").and_then(|s| s.parse().ok())
+ {
+ SubdiagnosticKind::MultipartSuggestion { suggestion_kind }
+ } else {
+ throw_invalid_attr!(attr, &meta);
}
-
- let Ok(kind) = SubdiagnosticKind::from_str(name) else {
- throw_invalid_attr!(attr, &meta)
- };
-
- kind
}
- _ => throw_invalid_attr!(attr, &meta),
};
- if matches!(
- kind,
- SubdiagnosticKind::Label | SubdiagnosticKind::Help | SubdiagnosticKind::Note
- ) && self.code.is_some()
- {
- throw_span_err!(
- span,
- &format!("`code` is not a valid nested attribute of a `{}` attribute", name)
- );
+ let mut slug = None;
+ let mut code = None;
+
+ let mut nested_iter = nested.into_iter();
+ if let Some(nested_attr) = nested_iter.next() {
+ match nested_attr {
+ NestedMeta::Meta(Meta::Path(path)) => {
+ slug.set_once((path.clone(), span));
+ }
+ NestedMeta::Meta(meta @ Meta::NameValue(_))
+ if matches!(
+ meta.path().segments.last().unwrap().ident.to_string().as_str(),
+ "code" | "applicability"
+ ) =>
+ {
+ // Don't error for valid follow-up attributes.
+ }
+ nested_attr => {
+ throw_invalid_nested_attr!(attr, &nested_attr, |diag| {
+ diag.help(
+ "first argument of the attribute should be the diagnostic \
+ slug",
+ )
+ })
+ }
+ };
}
- if matches!(
- kind,
- SubdiagnosticKind::Label | SubdiagnosticKind::Help | SubdiagnosticKind::Note
- ) && self.applicability.is_some()
- {
- throw_span_err!(
- span,
- &format!(
- "`applicability` is not a valid nested attribute of a `{}` attribute",
- name
- )
- );
+ for nested_attr in nested_iter {
+ let meta = match nested_attr {
+ NestedMeta::Meta(ref meta) => meta,
+ _ => throw_invalid_nested_attr!(attr, &nested_attr),
+ };
+
+ let span = meta.span().unwrap();
+ let nested_name = meta.path().segments.last().unwrap().ident.to_string();
+ let nested_name = nested_name.as_str();
+
+ let value = match meta {
+ Meta::NameValue(MetaNameValue { lit: syn::Lit::Str(value), .. }) => value,
+ Meta::Path(_) => throw_invalid_nested_attr!(attr, &nested_attr, |diag| {
+ diag.help("a diagnostic slug must be the first argument to the attribute")
+ }),
+ _ => throw_invalid_nested_attr!(attr, &nested_attr),
+ };
+
+ match nested_name {
+ "code" => {
+ if matches!(kind, SubdiagnosticKind::Suggestion { .. }) {
+ let formatted_str = self.build_format(&value.value(), value.span());
+ code.set_once((formatted_str, span));
+ } else {
+ span_err(
+ span,
+ &format!(
+ "`code` is not a valid nested attribute of a `{}` attribute",
+ name
+ ),
+ )
+ .emit();
+ }
+ }
+ "applicability" => {
+ if matches!(
+ kind,
+ SubdiagnosticKind::Suggestion { .. }
+ | SubdiagnosticKind::MultipartSuggestion { .. }
+ ) {
+ let value =
+ Applicability::from_str(&value.value()).unwrap_or_else(|()| {
+ span_err(span, "invalid applicability").emit();
+ Applicability::Unspecified
+ });
+ self.applicability.set_once((quote! { #value }, span));
+ } else {
+ span_err(
+ span,
+ &format!(
+ "`applicability` is not a valid nested attribute of a `{}` attribute",
+ name
+ )
+ ).emit();
+ }
+ }
+ _ => throw_invalid_nested_attr!(attr, &nested_attr, |diag| {
+ diag.help("only `code` and `applicability` are valid nested attributes")
+ }),
+ }
}
- if self.slug.is_none() {
+ let Some((slug, _)) = slug else {
throw_span_err!(
span,
&format!(
@@ -342,150 +374,334 @@ impl<'a> SessionSubdiagnosticDeriveBuilder<'a> {
name
)
);
+ };
+
+ match kind {
+ SubdiagnosticKind::Suggestion { code: ref mut code_field, .. } => {
+ let Some((code, _)) = code else {
+ throw_span_err!(span, "suggestion without `code = \"...\"`");
+ };
+ *code_field = code;
+ }
+ SubdiagnosticKind::Label
+ | SubdiagnosticKind::Note
+ | SubdiagnosticKind::Help
+ | SubdiagnosticKind::Warn
+ | SubdiagnosticKind::MultipartSuggestion { .. } => {}
}
- self.kind.set_once((kind, span));
+ kind_slugs.push((kind, slug))
}
- Ok(())
+ Ok(kind_slugs)
}
- fn generate_field_code(
+ /// Generates the code for a field with no attributes.
+ fn generate_field_set_arg(&mut self, binding: &BindingInfo<'_>) -> TokenStream {
+ let ast = binding.ast();
+ assert_eq!(ast.attrs.len(), 0, "field with attribute used as diagnostic arg");
+
+ let diag = &self.diag;
+ let ident = ast.ident.as_ref().unwrap();
+ quote! {
+ #diag.set_arg(
+ stringify!(#ident),
+ #binding
+ );
+ }
+ }
+
+ /// Generates the necessary code for all attributes on a field.
+ fn generate_field_attr_code(
&mut self,
binding: &BindingInfo<'_>,
- is_suggestion: bool,
- ) -> Result<TokenStream, DiagnosticDeriveError> {
+ kind_stats: KindsStatistics,
+ ) -> TokenStream {
let ast = binding.ast();
+ assert!(ast.attrs.len() > 0, "field without attributes generating attr code");
+ // Abstract over `Vec<T>` and `Option<T>` fields using `FieldInnerTy`, which will
+ // apply the generated code on each element in the `Vec` or `Option`.
let inner_ty = FieldInnerTy::from_type(&ast.ty);
- let info = FieldInfo {
- binding: binding,
- ty: inner_ty.inner_type().unwrap_or(&ast.ty),
- span: &ast.span(),
- };
+ ast.attrs
+ .iter()
+ .map(|attr| {
+ let info = FieldInfo {
+ binding,
+ ty: inner_ty.inner_type().unwrap_or(&ast.ty),
+ span: &ast.span(),
+ };
- for attr in &ast.attrs {
- let name = attr.path.segments.last().unwrap().ident.to_string();
- let name = name.as_str();
- let span = attr.span().unwrap();
+ let generated = self
+ .generate_field_code_inner(kind_stats, attr, info)
+ .unwrap_or_else(|v| v.to_compile_error());
- let meta = attr.parse_meta()?;
- match meta {
- Meta::Path(_) => match name {
- "primary_span" => {
- report_error_if_not_applied_to_span(attr, &info)?;
- self.span_field.set_once((binding.binding.clone(), span));
- return Ok(quote! {});
- }
- "applicability" if is_suggestion => {
- report_error_if_not_applied_to_applicability(attr, &info)?;
- let binding = binding.binding.clone();
- self.applicability.set_once((quote! { #binding }, span));
- return Ok(quote! {});
- }
- "applicability" => {
- span_err(span, "`#[applicability]` is only valid on suggestions").emit();
- return Ok(quote! {});
- }
- "skip_arg" => {
- return Ok(quote! {});
- }
- _ => throw_invalid_attr!(attr, &meta, |diag| {
+ inner_ty.with(binding, generated)
+ })
+ .collect()
+ }
+
+ fn generate_field_code_inner(
+ &mut self,
+ kind_stats: KindsStatistics,
+ attr: &Attribute,
+ info: FieldInfo<'_>,
+ ) -> Result<TokenStream, DiagnosticDeriveError> {
+ let meta = attr.parse_meta()?;
+ match meta {
+ Meta::Path(path) => self.generate_field_code_inner_path(kind_stats, attr, info, path),
+ Meta::List(list @ MetaList { .. }) => {
+ self.generate_field_code_inner_list(kind_stats, attr, info, list)
+ }
+ _ => throw_invalid_attr!(attr, &meta),
+ }
+ }
+
+ /// Generates the code for a `[Meta::Path]`-like attribute on a field (e.g. `#[primary_span]`).
+ fn generate_field_code_inner_path(
+ &mut self,
+ kind_stats: KindsStatistics,
+ attr: &Attribute,
+ info: FieldInfo<'_>,
+ path: Path,
+ ) -> Result<TokenStream, DiagnosticDeriveError> {
+ let span = attr.span().unwrap();
+ let ident = &path.segments.last().unwrap().ident;
+ let name = ident.to_string();
+ let name = name.as_str();
+
+ match name {
+ "skip_arg" => Ok(quote! {}),
+ "primary_span" => {
+ if kind_stats.has_multipart_suggestion {
+ throw_invalid_attr!(attr, &Meta::Path(path), |diag| {
diag.help(
- "only `primary_span`, `applicability` and `skip_arg` are valid field \
- attributes",
+ "multipart suggestions use one or more `#[suggestion_part]`s rather \
+ than one `#[primary_span]`",
)
- }),
- },
- _ => throw_invalid_attr!(attr, &meta),
+ })
+ }
+
+ report_error_if_not_applied_to_span(attr, &info)?;
+
+ let binding = info.binding.binding.clone();
+ self.span_field.set_once((binding, span));
+
+ Ok(quote! {})
+ }
+ "suggestion_part" => {
+ self.has_suggestion_parts = true;
+
+ if kind_stats.has_multipart_suggestion {
+ span_err(span, "`#[suggestion_part(...)]` attribute without `code = \"...\"`")
+ .emit();
+ Ok(quote! {})
+ } else {
+ throw_invalid_attr!(attr, &Meta::Path(path), |diag| {
+ diag.help(
+ "`#[suggestion_part(...)]` is only valid in multipart suggestions, use `#[primary_span]` instead",
+ )
+ });
+ }
+ }
+ "applicability" => {
+ if kind_stats.has_multipart_suggestion || kind_stats.has_normal_suggestion {
+ report_error_if_not_applied_to_applicability(attr, &info)?;
+
+ let binding = info.binding.binding.clone();
+ self.applicability.set_once((quote! { #binding }, span));
+ } else {
+ span_err(span, "`#[applicability]` is only valid on suggestions").emit();
+ }
+
+ Ok(quote! {})
}
+ _ => throw_invalid_attr!(attr, &Meta::Path(path), |diag| {
+ let mut span_attrs = vec![];
+ if kind_stats.has_multipart_suggestion {
+ span_attrs.push("suggestion_part");
+ }
+ if !kind_stats.all_multipart_suggestions {
+ span_attrs.push("primary_span")
+ }
+ diag.help(format!(
+ "only `{}`, `applicability` and `skip_arg` are valid field attributes",
+ span_attrs.join(", ")
+ ))
+ }),
}
+ }
- let ident = ast.ident.as_ref().unwrap();
+ /// Generates the code for a `[Meta::List]`-like attribute on a field (e.g.
+ /// `#[suggestion_part(code = "...")]`).
+ fn generate_field_code_inner_list(
+ &mut self,
+ kind_stats: KindsStatistics,
+ attr: &Attribute,
+ info: FieldInfo<'_>,
+ list: MetaList,
+ ) -> Result<TokenStream, DiagnosticDeriveError> {
+ let span = attr.span().unwrap();
+ let ident = &list.path.segments.last().unwrap().ident;
+ let name = ident.to_string();
+ let name = name.as_str();
+
+ match name {
+ "suggestion_part" => {
+ if !kind_stats.has_multipart_suggestion {
+ throw_invalid_attr!(attr, &Meta::List(list), |diag| {
+ diag.help(
+ "`#[suggestion_part(...)]` is only valid in multipart suggestions",
+ )
+ })
+ }
- let diag = &self.diag;
- let generated = quote! {
- #diag.set_arg(
- stringify!(#ident),
- #binding
- );
- };
+ self.has_suggestion_parts = true;
+
+ report_error_if_not_applied_to_span(attr, &info)?;
+
+ let mut code = None;
+ for nested_attr in list.nested.iter() {
+ let NestedMeta::Meta(ref meta) = nested_attr else {
+ throw_invalid_nested_attr!(attr, &nested_attr);
+ };
+
+ let span = meta.span().unwrap();
+ let nested_name = meta.path().segments.last().unwrap().ident.to_string();
+ let nested_name = nested_name.as_str();
+
+ let Meta::NameValue(MetaNameValue { lit: syn::Lit::Str(value), .. }) = meta else {
+ throw_invalid_nested_attr!(attr, &nested_attr);
+ };
+
+ match nested_name {
+ "code" => {
+ let formatted_str = self.build_format(&value.value(), value.span());
+ code.set_once((formatted_str, span));
+ }
+ _ => throw_invalid_nested_attr!(attr, &nested_attr, |diag| {
+ diag.help("`code` is the only valid nested attribute")
+ }),
+ }
+ }
- Ok(inner_ty.with(binding, generated))
+ let Some((code, _)) = code else {
+ span_err(span, "`#[suggestion_part(...)]` attribute without `code = \"...\"`")
+ .emit();
+ return Ok(quote! {});
+ };
+ let binding = info.binding;
+
+ Ok(quote! { suggestions.push((#binding, #code)); })
+ }
+ _ => throw_invalid_attr!(attr, &Meta::List(list), |diag| {
+ let mut span_attrs = vec![];
+ if kind_stats.has_multipart_suggestion {
+ span_attrs.push("suggestion_part");
+ }
+ if !kind_stats.all_multipart_suggestions {
+ span_attrs.push("primary_span")
+ }
+ diag.help(format!(
+ "only `{}`, `applicability` and `skip_arg` are valid field attributes",
+ span_attrs.join(", ")
+ ))
+ }),
+ }
}
- fn into_tokens(&mut self) -> Result<TokenStream, DiagnosticDeriveError> {
- self.identify_kind()?;
- let Some(kind) = self.kind.map(|(kind, _)| kind) else {
+ pub fn into_tokens(&mut self) -> Result<TokenStream, DiagnosticDeriveError> {
+ let kind_slugs = self.identify_kind()?;
+ if kind_slugs.is_empty() {
throw_span_err!(
self.variant.ast().ident.span().unwrap(),
"subdiagnostic kind not specified"
);
};
- let is_suggestion = matches!(kind, SubdiagnosticKind::Suggestion(_));
+ let kind_stats: KindsStatistics = kind_slugs.iter().map(|(kind, _slug)| kind).collect();
- let mut args = TokenStream::new();
- for binding in self.variant.bindings() {
- let arg = self
- .generate_field_code(binding, is_suggestion)
- .unwrap_or_else(|v| v.to_compile_error());
- args.extend(arg);
- }
-
- // Missing slug errors will already have been reported.
- let slug = self
- .slug
- .as_ref()
- .map(|(slug, _)| slug.clone())
- .unwrap_or_else(|| parse_quote! { you::need::to::specify::a::slug });
- let code = match self.code.as_ref() {
- Some((code, _)) => Some(quote! { #code }),
- None if is_suggestion => {
- span_err(self.span, "suggestion without `code = \"...\"`").emit();
- Some(quote! { /* macro error */ "..." })
- }
- None => None,
+ let init = if kind_stats.has_multipart_suggestion {
+ quote! { let mut suggestions = Vec::new(); }
+ } else {
+ quote! {}
};
+ let attr_args: TokenStream = self
+ .variant
+ .bindings()
+ .iter()
+ .filter(|binding| !binding.ast().attrs.is_empty())
+ .map(|binding| self.generate_field_attr_code(binding, kind_stats))
+ .collect();
+
let span_field = self.span_field.as_ref().map(|(span, _)| span);
- let applicability = match self.applicability.clone() {
- Some((applicability, _)) => Some(applicability),
- None if is_suggestion => {
- span_err(self.span, "suggestion without `applicability`").emit();
- Some(quote! { rustc_errors::Applicability::Unspecified })
- }
- None => None,
- };
+ let applicability = self.applicability.take().map_or_else(
+ || quote! { rustc_errors::Applicability::Unspecified },
+ |(applicability, _)| applicability,
+ );
let diag = &self.diag;
- let name = format_ident!("{}{}", if span_field.is_some() { "span_" } else { "" }, kind);
- let message = quote! { rustc_errors::fluent::#slug };
- let call = if matches!(kind, SubdiagnosticKind::Suggestion(..)) {
- if let Some(span) = span_field {
- quote! { #diag.#name(#span, #message, #code, #applicability); }
- } else {
- span_err(self.span, "suggestion without `#[primary_span]` field").emit();
- quote! { unreachable!(); }
- }
- } else if matches!(kind, SubdiagnosticKind::Label) {
- if let Some(span) = span_field {
- quote! { #diag.#name(#span, #message); }
- } else {
- span_err(self.span, "label without `#[primary_span]` field").emit();
- quote! { unreachable!(); }
- }
- } else {
- if let Some(span) = span_field {
- quote! { #diag.#name(#span, #message); }
- } else {
- quote! { #diag.#name(#message); }
- }
- };
+ let mut calls = TokenStream::new();
+ for (kind, slug) in kind_slugs {
+ let name = format_ident!("{}{}", if span_field.is_some() { "span_" } else { "" }, kind);
+ let message = quote! { rustc_errors::fluent::#slug };
+ let call = match kind {
+ SubdiagnosticKind::Suggestion { suggestion_kind, code } => {
+ if let Some(span) = span_field {
+ let style = suggestion_kind.to_suggestion_style();
+
+ quote! { #diag.#name(#span, #message, #code, #applicability, #style); }
+ } else {
+ span_err(self.span, "suggestion without `#[primary_span]` field").emit();
+ quote! { unreachable!(); }
+ }
+ }
+ SubdiagnosticKind::MultipartSuggestion { suggestion_kind } => {
+ if !self.has_suggestion_parts {
+ span_err(
+ self.span,
+ "multipart suggestion without any `#[suggestion_part(...)]` fields",
+ )
+ .emit();
+ }
+
+ let style = suggestion_kind.to_suggestion_style();
+
+ quote! { #diag.#name(#message, suggestions, #applicability, #style); }
+ }
+ SubdiagnosticKind::Label => {
+ if let Some(span) = span_field {
+ quote! { #diag.#name(#span, #message); }
+ } else {
+ span_err(self.span, "label without `#[primary_span]` field").emit();
+ quote! { unreachable!(); }
+ }
+ }
+ _ => {
+ if let Some(span) = span_field {
+ quote! { #diag.#name(#span, #message); }
+ } else {
+ quote! { #diag.#name(#message); }
+ }
+ }
+ };
+ calls.extend(call);
+ }
+
+ let plain_args: TokenStream = self
+ .variant
+ .bindings()
+ .iter()
+ .filter(|binding| binding.ast().attrs.is_empty())
+ .map(|binding| self.generate_field_set_arg(binding))
+ .collect();
Ok(quote! {
- #call
- #args
+ #init
+ #attr_args
+ #calls
+ #plain_args
})
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-24 19:48:36 +0000