Module from 

Re-exports

use rustc_ast as ast; 🔒

use rustc_ast::ItemKind; 🔒

use rustc_ast::VariantData; 🔒

use rustc_errors::MultiSpan; 🔒

use rustc_expand::base::DummyResult; 🔒

use rustc_expand::base::ExtCtxt; 🔒

use rustc_span::Ident; 🔒

use rustc_span::Span; 🔒

use rustc_span::kw; 🔒

use rustc_span::sym; 🔒

use thin_vec::thin_vec; 🔒

use crate::deriving::pathvec; 🔒

use crate::diagnostics; 🔒

use crate::deriving::generic::*; 🔒

Functions

expand_deriving_from 🔒

Generate an implementation of the From trait, provided that item is a struct or a tuple struct with exactly one field.