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enum messages: Make the returned values all 'static (#160)

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This is (at least in theory) a breaking change, because someone might
have implemented this trait by hand, and their implementation won't
be declared as returning 'static lifetimes.

Closes #159

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
This commit is contained in:
Ian Jackson 2021-05-18 23:52:33 +01:00 committed by GitHub
parent f71830c5fe
commit 3869b6fa90
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 9 additions and 9 deletions
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6
strum/src/lib.rs
View File

@ -118,9 +118,9 @@ pub trait IntoEnumIterator: Sized {
/// assert_eq!("I have a dog", my_pet.get_message().unwrap());
/// ```
pub trait EnumMessage {
fn get_message(&self) -> Option<&str>;
fn get_detailed_message(&self) -> Option<&str>;
fn get_serializations(&self) -> &[&str];
fn get_message(&self) -> Option<&'static str>;
fn get_detailed_message(&self) -> Option<&'static str>;
fn get_serializations(&self) -> &'static [&'static str];
}
/// EnumProperty is a trait that makes it possible to store additional information

6
strum_macros/src/lib.rs
View File

@ -396,7 +396,7 @@ pub fn enum_iter(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
/// // Generated code looks like more or less like this:
/// /*
/// impl ::strum::EnumMessage for Color {
/// fn get_message(&self) -> ::std::option::Option<&str> {
/// fn get_message(&self) -> ::std::option::Option<&'static str> {
/// match self {
/// &Color::Red => ::std::option::Option::Some("Red"),
/// &Color::Green {..} => ::std::option::Option::Some("Simply Green"),
@ -404,7 +404,7 @@ pub fn enum_iter(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
/// }
/// }
///
/// fn get_detailed_message(&self) -> ::std::option::Option<&str> {
/// fn get_detailed_message(&self) -> ::std::option::Option<&'static str> {
/// match self {
/// &Color::Red => ::std::option::Option::Some("This is very red"),
/// &Color::Green {..}=> ::std::option::Option::Some("Simply Green"),
@ -412,7 +412,7 @@ pub fn enum_iter(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
/// }
/// }
///
/// fn get_serializations(&self) -> &[&str] {
/// fn get_serializations(&self) -> &'static [&'static str] {
/// match self {
/// &Color::Red => {
/// static ARR: [&'static str; 1] = ["Red"];

6
strum_macros/src/macros/enum_messages.rs
View File

@ -80,19 +80,19 @@ pub fn enum_message_inner(ast: &DeriveInput) -> syn::Result<TokenStream> {
Ok(quote! {
impl #impl_generics ::strum::EnumMessage for #name #ty_generics #where_clause {
fn get_message(&self) -> ::core::option::Option<&str> {
fn get_message(&self) -> ::core::option::Option<&'static str> {
match self {
#(#arms),*
}
}
fn get_detailed_message(&self) -> ::core::option::Option<&str> {
fn get_detailed_message(&self) -> ::core::option::Option<&'static str> {
match self {
#(#detailed_arms),*
}
}
fn get_serializations(&self) -> &[&str] {
fn get_serializations(&self) -> &'static [&'static str] {
match self {
#(#serializations),*
}