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use syn::{Attribute, Data, Variant};
pub fn enum_data(data: Data) -> Vec<Variant> {
match data {
Data::Enum(e) => e.variants.into_iter().collect(),
_ => panic!("Expected enum"),
}
}
pub fn named_struct_fields_from_data(data: syn::Data) -> Vec<syn::Field> {
if let syn::Data::Struct(e) = data {
if let syn::Fields::Named(e) = e.fields {
e.named.into_iter().collect::<Vec<_>>()
} else {
panic!();
}
} else {
panic!();
}
}
pub fn contains_ident(fields: &[syn::Field], ident: &str) -> bool {
fields
.iter()
.filter_map(|f| f.ident.as_ref())
.any(|i| i.to_string() == ident)
}
pub fn filter_attributes_from_fields<'a>(
fields: &'a [syn::Field],
att_to_find: &'static str,
) -> Vec<&'a syn::Field> {
fields
.iter()
.filter(|f| attributes_contains(&f.attrs, att_to_find))
.collect()
}
pub fn filter_attributes_from_variants<'a>(
variants: &'a [syn::Variant],
att_to_find: &'static str,
) -> Vec<&'a syn::Variant> {
variants
.iter()
.filter(|f| attributes_contains(&f.attrs, att_to_find))
.collect()
}
pub fn attributes_contains(attrs: &[syn::Attribute], att_to_find: &str) -> bool {
attrs.iter().any(|a| attribute_contains(a, att_to_find))
}
pub fn attribute_contains(attr: &Attribute, att_to_find: &str) -> bool {
attr.path.segments.iter().any(|a| {
let y = a.ident.to_string();
let r = y.as_str();
r == att_to_find
})
}