Returns a collection of tokens that can be used to exhaustively access the struct's fields. If the struct is a tuple struct, span-less integer litera

Returns a collection of references to the struct's field types.

Create where-clause with a single predicate.

Returns the [`GenericParamList`], if any, of the declaration. For instance, this will return Some for `struct MyStruct<A, B, C> { ... }`, Some for `i

Returns Some if the attribute has a single path segment, eg `#[hello(...)]`. Returns None if the attribute has multiple segments, eg `#[hello::world(.

Returns Some if the variant is a wrapper around a single type. Returns None otherwise.

Returns `foo + bar` for `#[hello = foo + bar]` and `#[hello(foo + bar)]`. Returns an empty slice for `#[hello]`.

Returns true if every single variant is empty. ``` # use venial::parse_item; # use quote::quote; let enum_type = parse_item(quote!( enum MyEnum { A,

Returns true if the generic param is a const param.

True if this is a `static`, false if `const`.

Returns true if the generic param is a type param.

Create new lifetime param from name. ``` # use venial::GenericParam; GenericParam::lifetime("a") # ; ```

Returns the [`Ident`] of the declaration, if available. Certain declarations (currently `impl` blocks) do not have a name, as they refer to other (po

Create a new list.

Create a new error message with the given text. The span will be located at the macro's call site.

Create from proc_macro2 Group.

Create a new error message with the given text and span.

Create a new error message with the given text. Venial will do its best to locate the message at a span encompassing all the given tokens.

Helper method to create a WhereClauseItem from a quote. # Panics Panics if given a token stream that isn't a valid where-clause item.