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Add test of unnamed tuple struct field with inherited visibility #1601

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Mar 22, 2024
Merged

Add test of unnamed tuple struct field with inherited visibility #1601

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57 changes: 49 additions & 8 deletions tests/test_visibility.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@
mod macros;

use proc_macro2::{Delimiter, Group, Ident, Punct, Spacing, Span, TokenStream, TokenTree};
use quote::quote;
use syn::parse::{Parse, ParseStream};
use syn::{DeriveInput, Result, Visibility};

Expand Down Expand Up @@ -100,7 +101,7 @@ fn test_junk_after_in() {
}

#[test]
fn test_empty_group_vis() {
fn test_inherited_vis_named_field() {
// mimics `struct S { $vis $field: () }` where $vis is empty
let tokens = TokenStream::from_iter(vec![
TokenTree::Ident(Ident::new("struct", Span::call_site())),
Expand All @@ -109,13 +110,7 @@ fn test_empty_group_vis() {
Delimiter::Brace,
TokenStream::from_iter(vec![
TokenTree::Group(Group::new(Delimiter::None, TokenStream::new())),
TokenTree::Group(Group::new(
Delimiter::None,
TokenStream::from_iter(vec![TokenTree::Ident(Ident::new(
"f",
Span::call_site(),
))]),
)),
TokenTree::Group(Group::new(Delimiter::None, quote!(f))),
TokenTree::Punct(Punct::new(':', Spacing::Alone)),
TokenTree::Group(Group::new(Delimiter::Parenthesis, TokenStream::new())),
]),
Expand All @@ -142,3 +137,49 @@ fn test_empty_group_vis() {
}
"###);
}

#[test]
fn test_inherited_vis_unnamed_field() {
// mimics `struct S($vis $ty);` where $vis is empty
let tokens = TokenStream::from_iter(vec![
TokenTree::Ident(Ident::new("struct", Span::call_site())),
TokenTree::Ident(Ident::new("S", Span::call_site())),
TokenTree::Group(Group::new(
Delimiter::Parenthesis,
TokenStream::from_iter(vec![
TokenTree::Group(Group::new(Delimiter::None, TokenStream::new())),
TokenTree::Group(Group::new(Delimiter::None, quote!(str))),
]),
)),
TokenTree::Punct(Punct::new(';', Spacing::Alone)),
]);

snapshot!(tokens as DeriveInput, @r###"
DeriveInput {
vis: Visibility::Inherited,
ident: "S",
generics: Generics,
data: Data::Struct {
fields: Fields::Unnamed {
unnamed: [
Field {
vis: Visibility::Inherited,
ty: Type::Group {
elem: Type::Path {
path: Path {
segments: [
PathSegment {
ident: "str",
},
],
},
},
},
},
],
},
semi_token: Some,
},
}
"###);
}