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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-30 18:31:44 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-30 18:31:44 +0000 |
commit | c23a457e72abe608715ac76f076f47dc42af07a5 (patch) | |
tree | 2772049aaf84b5c9d0ed12ec8d86812f7a7904b6 /vendor/darling-0.14.4/tests/from_variant.rs | |
parent | Releasing progress-linux version 1.73.0+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-c23a457e72abe608715ac76f076f47dc42af07a5.tar.xz rustc-c23a457e72abe608715ac76f076f47dc42af07a5.zip |
Merging upstream version 1.74.1+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'vendor/darling-0.14.4/tests/from_variant.rs')
-rw-r--r-- | vendor/darling-0.14.4/tests/from_variant.rs | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/vendor/darling-0.14.4/tests/from_variant.rs b/vendor/darling-0.14.4/tests/from_variant.rs new file mode 100644 index 000000000..e89b8ff7f --- /dev/null +++ b/vendor/darling-0.14.4/tests/from_variant.rs @@ -0,0 +1,57 @@ +use darling::FromVariant; +use syn::{spanned::Spanned, Expr, ExprLit, LitInt}; + +#[derive(FromVariant)] +#[darling(from_ident, attributes(hello))] +#[allow(dead_code)] +pub struct Lorem { + ident: syn::Ident, + into: Option<bool>, + skip: Option<bool>, + discriminant: Option<syn::Expr>, + fields: darling::ast::Fields<syn::Type>, +} + +impl From<syn::Ident> for Lorem { + fn from(ident: syn::Ident) -> Self { + Lorem { + ident, + into: Default::default(), + skip: Default::default(), + discriminant: None, + fields: darling::ast::Style::Unit.into(), + } + } +} + +#[test] +fn discriminant() { + let input: syn::DeriveInput = syn::parse_str( + r#" + pub enum Test { + Works = 1, + AlsoWorks = 2, + } + "#, + ) + .unwrap(); + + let span = input.span(); + if let syn::Data::Enum(enm) = input.data { + let lorem = Lorem::from_variant( + enm.variants + .first() + .expect("Hardcoded input has one variant"), + ) + .expect("FromVariant can process the discriminant"); + assert_eq!( + lorem.discriminant, + Some(Expr::Lit(ExprLit { + attrs: vec![], + lit: LitInt::new("1", span).into(), + })) + ) + } else { + panic!("Data should be enum"); + } +} |