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Consider lifetime when adding trait bounds. #61

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Consider lifetime when adding trait bounds. #61

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14 changes: 12 additions & 2 deletions src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -169,8 +169,8 @@ use syn::parse::{ParseStream, Parser};
use syn::visit::{self, Visit};
use syn::{
braced, punctuated, token, Attribute, Data, DeriveInput, Error, Expr, Field, Fields,
FieldsNamed, FieldsUnnamed, GenericParam, Generics, Ident, PredicateType, Result, Token,
TraitBound, Type, TypeMacro, TypeParamBound, TypePath, WhereClause, WherePredicate,
FieldsNamed, FieldsUnnamed, GenericParam, Generics, Ident, Lifetime, PredicateType, Result,
Token, TraitBound, Type, TypeMacro, TypeParamBound, TypePath, WhereClause, WherePredicate,
};

use quote::{format_ident, quote_spanned, ToTokens};
Expand Down Expand Up @@ -476,6 +476,16 @@ fn get_ty_params(field: &Field, generics: &Generics) -> Vec<bool> {
}
}

fn visit_lifetime(&mut self, id: &'a Lifetime) {
for (idx, i) in self.generics.params.iter().enumerate() {
if let GenericParam::Lifetime(lparam) = i {
if lparam.lifetime == *id {
self.result[idx] = true;
}
}
}
}

fn visit_type_macro(&mut self, x: &'a TypeMacro) {
// If we see a type_mac declaration, then we can't know what type parameters
// it might be binding, so we presume it binds all of them.
Expand Down