1use rustc_hir::Node::*;
2use rustc_middle::ty::TyCtxt;
3use rustc_span::def_id::DefId;
4use rustc_span::symbol::Symbol;
5use rustc_span::{FileName, FileNameDisplayPreference};
6
7extern crate rustc_hir;
8extern crate rustc_middle;
9extern crate rustc_span;
10
11pub fn get_fn_name(tcx: TyCtxt<'_>, def_id: DefId) -> Option<String> {
12 let name = tcx.def_path(def_id).to_string_no_crate_verbose();
13 Some(name)
14}
15
16pub fn get_name(tcx: TyCtxt<'_>, def_id: DefId) -> Option<Symbol> {
17 if def_id.is_local() {
18 if let Some(node) = tcx.hir_get_if_local(def_id) {
19 match node {
20 Item(item) => {
21 let ident = tcx.hir_ident(item.hir_id());
22 return Some(ident.name);
23 }
24 ImplItem(item) => {
25 let ident = tcx.hir_ident(item.hir_id());
26 return Some(ident.name);
27 }
28 ForeignItem(item) => {
29 let ident = tcx.hir_ident(item.hir_id());
30 return Some(ident.name);
31 }
32 TraitItem(item) => {
33 let ident = tcx.hir_ident(item.hir_id());
34 return Some(ident.name);
35 }
36 _ => {
37 return None;
38 }
39 }
40 }
41 }
42 None
43}
44
45pub fn get_filename(tcx: TyCtxt<'_>, def_id: DefId) -> Option<String> {
46 if let Some(local_id) = def_id.as_local() {
48 let hir_id = tcx.local_def_id_to_hir_id(local_id);
49 let span = tcx.hir_span(hir_id);
50 let source_map = tcx.sess.source_map();
51
52 if let Some(filename) = source_map.span_to_filename(span).into() {
54 return Some(convert_filename(filename));
55 }
56 }
57 None
58}
59
60fn convert_filename(filename: FileName) -> String {
61 match filename {
62 FileName::Real(path) => path
63 .to_string_lossy(FileNameDisplayPreference::Local)
64 .into_owned(),
65 _ => "<unknown>".to_string(),
66 }
67}