strum_macros/helpers/
mod.rs

1pub use self::case_style::snakify;
2pub use self::inner_variant_props::HasInnerVariantProperties;
3pub use self::type_props::HasTypeProperties;
4pub use self::variant_props::HasStrumVariantProperties;
5
6pub mod case_style;
7pub mod inner_variant_props;
8mod metadata;
9pub mod type_props;
10pub mod variant_props;
11
12use proc_macro2::Span;
13use quote::ToTokens;
14use syn::spanned::Spanned;
15
16pub fn non_enum_error() -> syn::Error {
17    syn::Error::new(Span::call_site(), "This macro only supports enums.")
18}
19
20pub fn non_unit_variant_error() -> syn::Error {
21    syn::Error::new(
22        Span::call_site(),
23        "This macro only supports enums of strictly unit variants. Consider \
24        using it in conjunction with [`EnumDiscriminants`]",
25    )
26}
27
28pub fn strum_discriminants_passthrough_error(span: &impl Spanned) -> syn::Error {
29    syn::Error::new(
30        span.span(),
31        "expected a pass-through attribute, e.g. #[strum_discriminants(serde(rename = \"var0\"))]",
32    )
33}
34
35pub fn occurrence_error<T: ToTokens>(fst: T, snd: T, attr: &str) -> syn::Error {
36    let mut e = syn::Error::new_spanned(
37        snd,
38        format!("Found multiple occurrences of strum({})", attr),
39    );
40    e.combine(syn::Error::new_spanned(fst, "first one here"));
41    e
42}
strum_macros/helpers/mod.rs

strum_macros/helpers/
mod.rs
