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Disambiguate associated items in trait impls #193

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Nov 19, 2021
Merged

Disambiguate associated items in trait impls #193

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6 changes: 3 additions & 3 deletions strum_macros/src/macros/enum_iter.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -96,7 +96,7 @@ pub fn enum_iter_inner(ast: &DeriveInput) -> syn::Result<TokenStream> {
impl #impl_generics Iterator for #iter_name #ty_generics #where_clause {
type Item = #name #ty_generics;

fn next(&mut self) -> Option<Self::Item> {
fn next(&mut self) -> Option<<Self as Iterator>::Item> {
self.nth(0)
}

Expand All @@ -105,7 +105,7 @@ pub fn enum_iter_inner(ast: &DeriveInput) -> syn::Result<TokenStream> {
(t, Some(t))
}

fn nth(&mut self, n: usize) -> Option<Self::Item> {
fn nth(&mut self, n: usize) -> Option<<Self as Iterator>::Item> {
let idx = self.idx + n + 1;
if idx + self.back_idx > #variant_count {
// We went past the end of the iterator. Freeze idx at #variant_count
Expand All @@ -127,7 +127,7 @@ pub fn enum_iter_inner(ast: &DeriveInput) -> syn::Result<TokenStream> {
}

impl #impl_generics DoubleEndedIterator for #iter_name #ty_generics #where_clause {
fn next_back(&mut self) -> Option<Self::Item> {
fn next_back(&mut self) -> Option<<Self as Iterator>::Item> {
let back_idx = self.back_idx + 1;

if self.idx + back_idx > #variant_count {
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4 changes: 2 additions & 2 deletions strum_macros/src/macros/strings/from_string.rs
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Expand Up @@ -91,7 +91,7 @@ pub fn from_string_inner(ast: &DeriveInput) -> syn::Result<TokenStream> {
#[allow(clippy::use_self)]
impl #impl_generics ::core::str::FromStr for #name #ty_generics #where_clause {
type Err = #strum_module_path::ParseError;
fn from_str(s: &str) -> ::core::result::Result< #name #ty_generics , Self::Err> {
fn from_str(s: &str) -> ::core::result::Result< #name #ty_generics , <Self as ::core::str::FromStr>::Err> {
match s {
#(#arms),*
}
Expand Down Expand Up @@ -136,7 +136,7 @@ fn try_from_str(
#[allow(clippy::use_self)]
impl #impl_generics ::core::convert::TryFrom<&str> for #name #ty_generics #where_clause {
type Error = #strum_module_path::ParseError;
fn try_from(s: &str) -> ::core::result::Result< #name #ty_generics , Self::Error> {
fn try_from(s: &str) -> ::core::result::Result< #name #ty_generics , <Self as ::core::convert::TryFrom<&str>>::Error> {
::core::str::FromStr::from_str(s)
}
}
Expand Down