Struct rustc_hir_analysis::structured_errors::wrong_number_of_generic_args::WrongNumberOfGenericArgs

pub struct WrongNumberOfGenericArgs<'a, 'tcx> {
    pub(crate) tcx: TyCtxt<'tcx>,
    pub(crate) angle_brackets: AngleBrackets,
    pub(crate) gen_args_info: GenericArgsInfo,
    pub(crate) path_segment: &'a PathSegment<'a>,
    pub(crate) gen_params: &'a Generics,
    pub(crate) params_offset: usize,
    pub(crate) gen_args: &'a GenericArgs<'a>,
    pub(crate) def_id: DefId,
}

Handles the wrong number of type / lifetime / ... arguments family of error messages.

Fields

tcx: TyCtxt<'tcx>

angle_brackets: AngleBrackets

gen_args_info: GenericArgsInfo

path_segment: &'a PathSegment<'a>

Offending path segment

gen_params: &'a Generics

Generic parameters as expected by type or trait

params_offset: usize

Index offset into parameters. Depends on whether Self is included and on number of lifetime parameters in case we’re processing missing or redundant type or constant arguments.

gen_args: &'a GenericArgs<'a>

Generic arguments as provided by user

def_id: DefId

DefId of the generic type

Implementations

impl<'a, 'tcx> WrongNumberOfGenericArgs<'a, 'tcx>

pub fn new( tcx: TyCtxt<'tcx>, gen_args_info: GenericArgsInfo, path_segment: &'a PathSegment<'_>, gen_params: &'a Generics, params_offset: usize, gen_args: &'a GenericArgs<'a>, def_id: DefId ) -> Self

fn missing_lifetimes(&self) -> bool

fn kind(&self) -> &str

fn is_in_trait_impl(&self) -> bool

Returns true if the generic type is a trait and is being referred to from one of its trait impls

fn num_provided_args(&self) -> usize

fn num_provided_lifetime_args(&self) -> usize

fn num_provided_type_or_const_args(&self) -> usize

fn num_expected_lifetime_args(&self) -> usize

fn num_expected_type_or_const_args(&self) -> usize

fn num_expected_type_or_const_args_including_defaults(&self) -> usize

fn num_missing_lifetime_args(&self) -> usize

fn num_missing_type_or_const_args(&self) -> usize

fn num_excess_lifetime_args(&self) -> usize

fn num_excess_type_or_const_args(&self) -> usize

fn too_many_args_provided(&self) -> bool

fn not_enough_args_provided(&self) -> bool

fn get_lifetime_args_offset(&self) -> usize

fn get_num_default_params(&self) -> usize

fn is_synth_provided(&self) -> bool

fn get_quantifier_and_bound(&self) -> (&'static str, usize)

fn get_lifetime_args_suggestions_from_param_names( &self, path_hir_id: HirId, num_params_to_take: usize ) -> String

fn get_type_or_const_args_suggestions_from_param_names( &self, num_params_to_take: usize ) -> String

fn get_unbound_associated_types(&self) -> Vec<String>

fn create_error_message(&self) -> String

fn start_diagnostics(&self) -> DiagnosticBuilder<'tcx>

fn notify(&self, err: &mut DiagnosticBuilder<'_>)

Builds the expected 1 type argument / supplied 2 type arguments message.

fn suggest(&self, err: &mut DiagnosticBuilder<'_>)

fn suggest_adding_args(&self, err: &mut DiagnosticBuilder<'_>)

Suggests to add missing argument(s) when current invocation site already contains some generics:

type Map = HashMap<String>;

fn suggest_adding_lifetime_args(&self, err: &mut DiagnosticBuilder<'_>)

fn suggest_adding_type_and_const_args(&self, err: &mut DiagnosticBuilder<'_>)

fn suggest_moving_args_from_assoc_fn_to_trait( &self, err: &mut DiagnosticBuilder<'_> )

Suggests moving redundant argument(s) of an associate function to the trait it belongs to.

Into::into::<Option<_>>(42) // suggests considering `Into::<Option<_>>::into(42)`

fn suggest_moving_args_from_assoc_fn_to_trait_for_qualified_path( &self, err: &mut DiagnosticBuilder<'_>, qpath: &'tcx QPath<'tcx>, msg: String, num_assoc_fn_excess_args: usize, num_trait_generics_except_self: usize )

fn suggest_moving_args_from_assoc_fn_to_trait_for_method_call( &self, err: &mut DiagnosticBuilder<'_>, trait_def_id: DefId, expr: &'tcx Expr<'tcx>, msg: String, num_assoc_fn_excess_args: usize, num_trait_generics_except_self: usize )

fn suggest_removing_args_or_generics(&self, err: &mut DiagnosticBuilder<'_>)

Suggests to remove redundant argument(s):

type Map = HashMap<String, String, String, String>;

fn show_definition(&self, err: &mut DiagnosticBuilder<'_>)

Builds the type defined here message.

fn note_synth_provided(&self, err: &mut DiagnosticBuilder<'_>)

Add note if impl Trait is explicitly specified.

Trait Implementations

impl<'tcx> StructuredDiagnostic<'tcx> for WrongNumberOfGenericArgs<'_, 'tcx>

fn session(&self) -> &Session

fn code(&self) -> ErrCode

fn diagnostic_common(&self) -> DiagnosticBuilder<'tcx>

fn diagnostic(&self) -> DiagnosticBuilder<'tcx>

fn diagnostic_regular( &self, err: DiagnosticBuilder<'tcx> ) -> DiagnosticBuilder<'tcx>

fn diagnostic_extended( &self, err: DiagnosticBuilder<'tcx> ) -> DiagnosticBuilder<'tcx>

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 88 bytes