(index<- ) ./librustc/util/ppaux.rs
git branch: * master 5200215 auto merge of #14035 : alexcrichton/rust/experimental, r=huonw
modified: Fri May 9 13:02:28 2014
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
4 //
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
10
11
12 use middle::ty::{ReSkolemized, ReVar};
13 use middle::ty::{BoundRegion, BrAnon, BrNamed};
14 use middle::ty::{BrFresh, ctxt};
15 use middle::ty::{mt, t, param_ty};
16 use middle::ty::{ReFree, ReScope, ReInfer, ReStatic, Region,
17 ReEmpty};
18 use middle::ty::{ty_bool, ty_char, ty_bot, ty_box, ty_struct, ty_enum};
19 use middle::ty::{ty_err, ty_str, ty_vec, ty_float, ty_bare_fn, ty_closure};
20 use middle::ty::{ty_nil, ty_param, ty_ptr, ty_rptr, ty_self, ty_tup};
21 use middle::ty::{ty_uniq, ty_trait, ty_int, ty_uint, ty_infer};
22 use middle::ty;
23 use middle::typeck;
24
25 use std::rc::Rc;
26 use std::strbuf::StrBuf;
27 use syntax::abi;
28 use syntax::ast_map;
29 use syntax::codemap::{Span, Pos};
30 use syntax::parse::token;
31 use syntax::print::pprust;
32 use syntax::{ast, ast_util};
33 use syntax::owned_slice::OwnedSlice;
34
35 /// Produces a string suitable for debugging output.
36 pub trait Repr {
37 fn repr(&self, tcx: &ctxt) -> ~str;
38 }
39
40 /// Produces a string suitable for showing to the user.
41 pub trait UserString {
42 fn user_string(&self, tcx: &ctxt) -> ~str;
43 }
44
45 pub fn note_and_explain_region(cx: &ctxt,
46 prefix: &str,
47 region: ty::Region,
48 suffix: &str) {
49 match explain_region_and_span(cx, region) {
50 (ref str, Some(span)) => {
51 cx.sess.span_note(
52 span,
53 format!("{}{}{}", prefix, *str, suffix));
54 }
55 (ref str, None) => {
56 cx.sess.note(
57 format!("{}{}{}", prefix, *str, suffix));
58 }
59 }
60 }
61
62 pub fn explain_region_and_span(cx: &ctxt, region: ty::Region)
63 -> (~str, Option<Span>) {
64 return match region {
65 ReScope(node_id) => {
66 match cx.map.find(node_id) {
67 Some(ast_map::NodeBlock(ref blk)) => {
68 explain_span(cx, "block", blk.span)
69 }
70 Some(ast_map::NodeExpr(expr)) => {
71 match expr.node {
72 ast::ExprCall(..) => explain_span(cx, "call", expr.span),
73 ast::ExprMethodCall(..) => {
74 explain_span(cx, "method call", expr.span)
75 },
76 ast::ExprMatch(..) => explain_span(cx, "match", expr.span),
77 _ => explain_span(cx, "expression", expr.span)
78 }
79 }
80 Some(ast_map::NodeStmt(stmt)) => {
81 explain_span(cx, "statement", stmt.span)
82 }
83 Some(ast_map::NodeItem(it)) if (match it.node {
84 ast::ItemFn(..) => true, _ => false}) => {
85 explain_span(cx, "function body", it.span)
86 }
87 Some(_) | None => {
88 // this really should not happen
89 (format!("unknown scope: {}. Please report a bug.", node_id),
90 None)
91 }
92 }
93 }
94
95 ReFree(ref fr) => {
96 let prefix = match fr.bound_region {
97 BrAnon(idx) => format!("the anonymous lifetime \\#{} defined on",
98 idx + 1),
99 BrFresh(_) => format!("an anonymous lifetime defined on"),
100 _ => format!("the lifetime {} as defined on",
101 bound_region_ptr_to_str(cx, fr.bound_region))
102 };
103
104 match cx.map.find(fr.scope_id) {
105 Some(ast_map::NodeBlock(ref blk)) => {
106 let (msg, opt_span) = explain_span(cx, "block", blk.span);
107 (format!("{} {}", prefix, msg), opt_span)
108 }
109 Some(ast_map::NodeItem(it)) if match it.node {
110 ast::ItemImpl(..) => true, _ => false} => {
111 let (msg, opt_span) = explain_span(cx, "impl", it.span);
112 (format!("{} {}", prefix, msg), opt_span)
113 }
114 Some(_) | None => {
115 // this really should not happen
116 (format!("{} node {}", prefix, fr.scope_id), None)
117 }
118 }
119 }
120
121 ReStatic => { ("the static lifetime".to_owned(), None) }
122
123 ReEmpty => { ("the empty lifetime".to_owned(), None) }
124
125 // I believe these cases should not occur (except when debugging,
126 // perhaps)
127 ty::ReInfer(_) | ty::ReEarlyBound(..) | ty::ReLateBound(..) => {
128 (format!("lifetime {:?}", region), None)
129 }
130 };
131
132 fn explain_span(cx: &ctxt, heading: &str, span: Span)
133 -> (~str, Option<Span>) {
134 let lo = cx.sess.codemap().lookup_char_pos_adj(span.lo);
135 (format!("the {} at {}:{}", heading,
136 lo.line, lo.col.to_uint()), Some(span))
137 }
138 }
139
140 pub fn bound_region_ptr_to_str(cx: &ctxt, br: BoundRegion) -> ~str {
141 bound_region_to_str(cx, "&", true, br)
142 }
143
144 pub fn bound_region_to_str(cx: &ctxt,
145 prefix: &str, space: bool,
146 br: BoundRegion) -> ~str {
147 let space_str = if space { " " } else { "" };
148
149 if cx.sess.verbose() {
150 return format!("{}{}{}", prefix, br.repr(cx), space_str);
151 }
152
153 match br {
154 BrNamed(_, name) => format!("{}'{}{}", prefix,
155 token::get_name(name), space_str),
156 BrAnon(_) => prefix.to_str(),
157 BrFresh(_) => prefix.to_str(),
158 }
159 }
160
161 // In general, if you are giving a region error message,
162 // you should use `explain_region()` or, better yet,
163 // `note_and_explain_region()`
164 pub fn region_ptr_to_str(cx: &ctxt, region: Region) -> ~str {
165 region_to_str(cx, "&", true, region)
166 }
167
168 pub fn region_to_str(cx: &ctxt, prefix: &str, space: bool, region: Region) -> ~str {
169 let space_str = if space { " " } else { "" };
170
171 if cx.sess.verbose() {
172 return format!("{}{}{}", prefix, region.repr(cx), space_str);
173 }
174
175 // These printouts are concise. They do not contain all the information
176 // the user might want to diagnose an error, but there is basically no way
177 // to fit that into a short string. Hence the recommendation to use
178 // `explain_region()` or `note_and_explain_region()`.
179 match region {
180 ty::ReScope(_) => prefix.to_str(),
181 ty::ReEarlyBound(_, _, name) => token::get_name(name).get().to_str(),
182 ty::ReLateBound(_, br) => bound_region_to_str(cx, prefix, space, br),
183 ty::ReFree(ref fr) => bound_region_to_str(cx, prefix, space, fr.bound_region),
184 ty::ReInfer(ReSkolemized(_, br)) => {
185 bound_region_to_str(cx, prefix, space, br)
186 }
187 ty::ReInfer(ReVar(_)) => prefix.to_str(),
188 ty::ReStatic => format!("{}'static{}", prefix, space_str),
189 ty::ReEmpty => format!("{}'<empty>{}", prefix, space_str)
190 }
191 }
192
193 pub fn mutability_to_str(m: ast::Mutability) -> ~str {
194 match m {
195 ast::MutMutable => "mut ".to_owned(),
196 ast::MutImmutable => "".to_owned(),
197 }
198 }
199
200 pub fn mt_to_str(cx: &ctxt, m: &mt) -> ~str {
201 format!("{}{}", mutability_to_str(m.mutbl), ty_to_str(cx, m.ty))
202 }
203
204 pub fn trait_store_to_str(cx: &ctxt, s: ty::TraitStore) -> ~str {
205 match s {
206 ty::UniqTraitStore => "Box ".to_owned(),
207 ty::RegionTraitStore(r, m) => {
208 format!("{}{}", region_ptr_to_str(cx, r), mutability_to_str(m))
209 }
210 }
211 }
212
213 pub fn vec_map_to_str<T>(ts: &[T], f: |t: &T| -> ~str) -> ~str {
214 let tstrs = ts.iter().map(f).collect::<Vec<~str>>();
215 format!("[{}]", tstrs.connect(", "))
216 }
217
218 pub fn fn_sig_to_str(cx: &ctxt, typ: &ty::FnSig) -> ~str {
219 format!("fn{}{} -> {}",
220 typ.binder_id,
221 typ.inputs.repr(cx),
222 typ.output.repr(cx))
223 }
224
225 pub fn trait_ref_to_str(cx: &ctxt, trait_ref: &ty::TraitRef) -> ~str {
226 trait_ref.user_string(cx)
227 }
228
229 pub fn ty_to_str(cx: &ctxt, typ: t) -> ~str {
230 fn fn_input_to_str(cx: &ctxt, input: ty::t) -> ~str {
231 ty_to_str(cx, input)
232 }
233 fn bare_fn_to_str(cx: &ctxt,
234 fn_style: ast::FnStyle,
235 abi: abi::Abi,
236 ident: Option<ast::Ident>,
237 sig: &ty::FnSig)
238 -> ~str {
239 let mut s = if abi == abi::Rust {
240 StrBuf::new()
241 } else {
242 StrBuf::from_owned_str(format!("extern {} ", abi.to_str()))
243 };
244
245 match fn_style {
246 ast::NormalFn => {}
247 _ => {
248 s.push_str(fn_style.to_str());
249 s.push_char(' ');
250 }
251 };
252
253 s.push_str("fn");
254
255 match ident {
256 Some(i) => {
257 s.push_char(' ');
258 s.push_str(token::get_ident(i).get());
259 }
260 _ => { }
261 }
262
263 push_sig_to_str(cx, &mut s, '(', ')', sig);
264
265 s.into_owned()
266 }
267
268 fn closure_to_str(cx: &ctxt, cty: &ty::ClosureTy) -> ~str {
269 let mut s = StrBuf::new();
270
271 match cty.store {
272 ty::UniqTraitStore => {}
273 ty::RegionTraitStore(region, _) => {
274 s.push_str(region_to_str(cx, "", true, region));
275 }
276 }
277
278 match cty.fn_style {
279 ast::NormalFn => {}
280 _ => {
281 s.push_str(cty.fn_style.to_str());
282 s.push_char(' ');
283 }
284 };
285
286 match cty.store {
287 ty::UniqTraitStore => {
288 assert_eq!(cty.onceness, ast::Once);
289 s.push_str("proc");
290 push_sig_to_str(cx, &mut s, '(', ')', &cty.sig);
291 }
292 ty::RegionTraitStore(..) => {
293 match cty.onceness {
294 ast::Many => {}
295 ast::Once => s.push_str("once ")
296 }
297 push_sig_to_str(cx, &mut s, '|', '|', &cty.sig);
298 }
299 }
300
301 if !cty.bounds.is_empty() {
302 s.push_str(":");
303 s.push_str(cty.bounds.repr(cx));
304 }
305
306 s.into_owned()
307 }
308
309 fn push_sig_to_str(cx: &ctxt,
310 s: &mut StrBuf,
311 bra: char,
312 ket: char,
313 sig: &ty::FnSig) {
314 s.push_char(bra);
315 let strs: Vec<~str> = sig.inputs.iter().map(|a| fn_input_to_str(cx, *a)).collect();
316 s.push_str(strs.connect(", "));
317 if sig.variadic {
318 s.push_str(", ...");
319 }
320 s.push_char(ket);
321
322 if ty::get(sig.output).sty != ty_nil {
323 s.push_str(" -> ");
324 if ty::type_is_bot(sig.output) {
325 s.push_char('!');
326 } else {
327 s.push_str(ty_to_str(cx, sig.output));
328 }
329 }
330 }
331
332 // if there is an id, print that instead of the structural type:
333 /*for def_id in ty::type_def_id(typ).iter() {
334 // note that this typedef cannot have type parameters
335 return ty::item_path_str(cx, *def_id);
336 }*/
337
338 // pretty print the structural type representation:
339 return match ty::get(typ).sty {
340 ty_nil => "()".to_owned(),
341 ty_bot => "!".to_owned(),
342 ty_bool => "bool".to_owned(),
343 ty_char => "char".to_owned(),
344 ty_int(t) => ast_util::int_ty_to_str(t, None).to_owned(),
345 ty_uint(t) => ast_util::uint_ty_to_str(t, None).to_owned(),
346 ty_float(t) => ast_util::float_ty_to_str(t).to_owned(),
347 ty_box(typ) => "@".to_owned() + ty_to_str(cx, typ),
348 ty_uniq(typ) => "~".to_owned() + ty_to_str(cx, typ),
349 ty_ptr(ref tm) => "*".to_owned() + mt_to_str(cx, tm),
350 ty_rptr(r, ref tm) => {
351 region_ptr_to_str(cx, r) + mt_to_str(cx, tm)
352 }
353 ty_tup(ref elems) => {
354 let strs: Vec<~str> = elems.iter().map(|elem| ty_to_str(cx, *elem)).collect();
355 "(".to_owned() + strs.connect(",") + ")"
356 }
357 ty_closure(ref f) => {
358 closure_to_str(cx, *f)
359 }
360 ty_bare_fn(ref f) => {
361 bare_fn_to_str(cx, f.fn_style, f.abi, None, &f.sig)
362 }
363 ty_infer(infer_ty) => infer_ty.to_str(),
364 ty_err => "[type error]".to_owned(),
365 ty_param(param_ty {idx: id, def_id: did}) => {
366 let ident = match cx.ty_param_defs.borrow().find(&did.node) {
367 Some(def) => token::get_ident(def.ident).get().to_str(),
368 // This can only happen when a type mismatch error happens and
369 // the actual type has more type parameters than the expected one.
370 None => format!("<generic \\#{}>", id)
371 };
372 if !cx.sess.verbose() {
373 ident
374 } else {
375 format!("{}:{:?}", ident, did)
376 }
377 }
378 ty_self(..) => "Self".to_owned(),
379 ty_enum(did, ref substs) | ty_struct(did, ref substs) => {
380 let base = ty::item_path_str(cx, did);
381 parameterized(cx,
382 base,
383 &substs.regions,
384 substs.tps.as_slice(),
385 did,
386 false)
387 }
388 ty_trait(box ty::TyTrait {
389 def_id: did, ref substs, store, ref bounds
390 }) => {
391 let base = ty::item_path_str(cx, did);
392 let ty = parameterized(cx, base, &substs.regions,
393 substs.tps.as_slice(), did, true);
394 let bound_sep = if bounds.is_empty() { "" } else { ":" };
395 let bound_str = bounds.repr(cx);
396 format!("{}{}{}{}", trait_store_to_str(cx, store), ty, bound_sep, bound_str)
397 }
398 ty_str => "str".to_owned(),
399 ty_vec(ref mt, sz) => {
400 match sz {
401 Some(n) => format!("[{}, .. {}]", mt_to_str(cx, mt), n),
402 None => format!("[{}]", ty_to_str(cx, mt.ty)),
403 }
404 }
405 }
406 }
407
408 pub fn parameterized(cx: &ctxt,
409 base: &str,
410 regions: &ty::RegionSubsts,
411 tps: &[ty::t],
412 did: ast::DefId,
413 is_trait: bool) -> ~str {
414
415 let mut strs = Vec::new();
416 match *regions {
417 ty::ErasedRegions => { }
418 ty::NonerasedRegions(ref regions) => {
419 for &r in regions.iter() {
420 strs.push(region_to_str(cx, "", false, r))
421 }
422 }
423 }
424
425 let generics = if is_trait {
426 ty::lookup_trait_def(cx, did).generics.clone()
427 } else {
428 ty::lookup_item_type(cx, did).generics
429 };
430 let ty_params = generics.type_param_defs();
431 let has_defaults = ty_params.last().map_or(false, |def| def.default.is_some());
432 let num_defaults = if has_defaults {
433 // We should have a borrowed version of substs instead of cloning.
434 let mut substs = ty::substs {
435 tps: Vec::from_slice(tps),
436 regions: regions.clone(),
437 self_ty: None
438 };
439 ty_params.iter().zip(tps.iter()).rev().take_while(|&(def, &actual)| {
440 substs.tps.pop();
441 match def.default {
442 Some(default) => ty::subst(cx, &substs, default) == actual,
443 None => false
444 }
445 }).len()
446 } else {
447 0
448 };
449
450 for t in tps.slice_to(tps.len() - num_defaults).iter() {
451 strs.push(ty_to_str(cx, *t))
452 }
453
454 if strs.len() > 0u {
455 format!("{}<{}>", base, strs.connect(","))
456 } else {
457 format!("{}", base)
458 }
459 }
460
461 pub fn ty_to_short_str(cx: &ctxt, typ: t) -> ~str {
462 let mut s = typ.repr(cx);
463 if s.len() >= 32u { s = s.slice(0u, 32u).to_owned(); }
464 return s;
465 }
466
467 impl<T:Repr> Repr for Option<T> {
468 fn repr(&self, tcx: &ctxt) -> ~str {
469 match self {
470 &None => "None".to_owned(),
471 &Some(ref t) => t.repr(tcx),
472 }
473 }
474 }
475
476 impl<T:Repr,U:Repr> Repr for Result<T,U> {
477 fn repr(&self, tcx: &ctxt) -> ~str {
478 match self {
479 &Ok(ref t) => t.repr(tcx),
480 &Err(ref u) => format!("Err({})", u.repr(tcx))
481 }
482 }
483 }
484
485 impl Repr for () {
486 fn repr(&self, _tcx: &ctxt) -> ~str {
487 "()".to_owned()
488 }
489 }
490
491 impl<T:Repr> Repr for Rc<T> {
492 fn repr(&self, tcx: &ctxt) -> ~str {
493 (&**self).repr(tcx)
494 }
495 }
496
497 impl<T:Repr> Repr for @T {
498 fn repr(&self, tcx: &ctxt) -> ~str {
499 (&**self).repr(tcx)
500 }
501 }
502
503 impl<T:Repr> Repr for Box<T> {
504 fn repr(&self, tcx: &ctxt) -> ~str {
505 (&**self).repr(tcx)
506 }
507 }
508
509 fn repr_vec<T:Repr>(tcx: &ctxt, v: &[T]) -> ~str {
510 vec_map_to_str(v, |t| t.repr(tcx))
511 }
512
513 impl<'a, T:Repr> Repr for &'a [T] {
514 fn repr(&self, tcx: &ctxt) -> ~str {
515 repr_vec(tcx, *self)
516 }
517 }
518
519 impl<T:Repr> Repr for OwnedSlice<T> {
520 fn repr(&self, tcx: &ctxt) -> ~str {
521 repr_vec(tcx, self.as_slice())
522 }
523 }
524
525 // This is necessary to handle types like Option<~[T]>, for which
526 // autoderef cannot convert the &[T] handler
527 impl<T:Repr> Repr for Vec<T> {
528 fn repr(&self, tcx: &ctxt) -> ~str {
529 repr_vec(tcx, self.as_slice())
530 }
531 }
532
533 impl Repr for ty::TypeParameterDef {
534 fn repr(&self, tcx: &ctxt) -> ~str {
535 format!("TypeParameterDef({:?}, {})",
536 self.def_id,
537 self.bounds.repr(tcx))
538 }
539 }
540
541 impl Repr for ty::RegionParameterDef {
542 fn repr(&self, _tcx: &ctxt) -> ~str {
543 format!("RegionParameterDef({}, {:?})",
544 token::get_name(self.name),
545 self.def_id)
546 }
547 }
548
549 impl Repr for ty::t {
550 fn repr(&self, tcx: &ctxt) -> ~str {
551 ty_to_str(tcx, *self)
552 }
553 }
554
555 impl Repr for ty::substs {
556 fn repr(&self, tcx: &ctxt) -> ~str {
557 format!("substs(regions={}, self_ty={}, tps={})",
558 self.regions.repr(tcx),
559 self.self_ty.repr(tcx),
560 self.tps.repr(tcx))
561 }
562 }
563
564 impl Repr for ty::RegionSubsts {
565 fn repr(&self, tcx: &ctxt) -> ~str {
566 match *self {
567 ty::ErasedRegions => "erased".to_owned(),
568 ty::NonerasedRegions(ref regions) => regions.repr(tcx)
569 }
570 }
571 }
572
573 impl Repr for ty::ParamBounds {
574 fn repr(&self, tcx: &ctxt) -> ~str {
575 let mut res = Vec::new();
576 for b in self.builtin_bounds.iter() {
577 res.push(match b {
578 ty::BoundStatic => "'static".to_owned(),
579 ty::BoundSend => "Send".to_owned(),
580 ty::BoundSized => "Sized".to_owned(),
581 ty::BoundCopy => "Pod".to_owned(),
582 ty::BoundShare => "Share".to_owned(),
583 });
584 }
585 for t in self.trait_bounds.iter() {
586 res.push(t.repr(tcx));
587 }
588 res.connect("+")
589 }
590 }
591
592 impl Repr for ty::TraitRef {
593 fn repr(&self, tcx: &ctxt) -> ~str {
594 trait_ref_to_str(tcx, self)
595 }
596 }
597
598 impl Repr for ast::Expr {
599 fn repr(&self, _tcx: &ctxt) -> ~str {
600 format!("expr({}: {})", self.id, pprust::expr_to_str(self))
601 }
602 }
603
604 impl Repr for ast::Item {
605 fn repr(&self, tcx: &ctxt) -> ~str {
606 format!("item({})", tcx.map.node_to_str(self.id))
607 }
608 }
609
610 impl Repr for ast::Stmt {
611 fn repr(&self, _tcx: &ctxt) -> ~str {
612 format!("stmt({}: {})",
613 ast_util::stmt_id(self),
614 pprust::stmt_to_str(self))
615 }
616 }
617
618 impl Repr for ast::Pat {
619 fn repr(&self, _tcx: &ctxt) -> ~str {
620 format!("pat({}: {})",
621 self.id,
622 pprust::pat_to_str(self))
623 }
624 }
625
626 impl Repr for ty::BoundRegion {
627 fn repr(&self, tcx: &ctxt) -> ~str {
628 match *self {
629 ty::BrAnon(id) => format!("BrAnon({})", id),
630 ty::BrNamed(id, name) => format!("BrNamed({}, {})",
631 id.repr(tcx),
632 token::get_name(name)),
633 ty::BrFresh(id) => format!("BrFresh({})", id),
634 }
635 }
636 }
637
638 impl Repr for ty::Region {
639 fn repr(&self, tcx: &ctxt) -> ~str {
640 match *self {
641 ty::ReEarlyBound(id, index, name) => {
642 format!("ReEarlyBound({}, {}, {})",
643 id, index, token::get_name(name))
644 }
645
646 ty::ReLateBound(binder_id, ref bound_region) => {
647 format!("ReLateBound({}, {})",
648 binder_id, bound_region.repr(tcx))
649 }
650
651 ty::ReFree(ref fr) => {
652 format!("ReFree({}, {})",
653 fr.scope_id,
654 fr.bound_region.repr(tcx))
655 }
656
657 ty::ReScope(id) => {
658 format!("ReScope({})", id)
659 }
660
661 ty::ReStatic => {
662 format!("ReStatic")
663 }
664
665 ty::ReInfer(ReVar(ref vid)) => {
666 format!("ReInfer({})", vid.id)
667 }
668
669 ty::ReInfer(ReSkolemized(id, ref bound_region)) => {
670 format!("re_skolemized({}, {})",
671 id, bound_region.repr(tcx))
672 }
673
674 ty::ReEmpty => {
675 format!("ReEmpty")
676 }
677 }
678 }
679 }
680
681 impl Repr for ast::DefId {
682 fn repr(&self, tcx: &ctxt) -> ~str {
683 // Unfortunately, there seems to be no way to attempt to print
684 // a path for a def-id, so I'll just make a best effort for now
685 // and otherwise fallback to just printing the crate/node pair
686 if self.krate == ast::LOCAL_CRATE {
687 {
688 match tcx.map.find(self.node) {
689 Some(ast_map::NodeItem(..)) |
690 Some(ast_map::NodeForeignItem(..)) |
691 Some(ast_map::NodeMethod(..)) |
692 Some(ast_map::NodeTraitMethod(..)) |
693 Some(ast_map::NodeVariant(..)) |
694 Some(ast_map::NodeStructCtor(..)) => {
695 return format!("{:?}:{}",
696 *self,
697 ty::item_path_str(tcx, *self));
698 }
699 _ => {}
700 }
701 }
702 }
703 return format!("{:?}", *self);
704 }
705 }
706
707 impl Repr for ty::ty_param_bounds_and_ty {
708 fn repr(&self, tcx: &ctxt) -> ~str {
709 format!("ty_param_bounds_and_ty \\{generics: {}, ty: {}\\}",
710 self.generics.repr(tcx),
711 self.ty.repr(tcx))
712 }
713 }
714
715 impl Repr for ty::Generics {
716 fn repr(&self, tcx: &ctxt) -> ~str {
717 format!("Generics(type_param_defs: {}, region_param_defs: {})",
718 self.type_param_defs().repr(tcx),
719 self.region_param_defs().repr(tcx))
720 }
721 }
722
723 impl Repr for ty::ItemVariances {
724 fn repr(&self, tcx: &ctxt) -> ~str {
725 format!("IterVariances(self_param={}, type_params={}, region_params={})",
726 self.self_param.repr(tcx),
727 self.type_params.repr(tcx),
728 self.region_params.repr(tcx))
729 }
730 }
731
732 impl Repr for ty::Variance {
733 fn repr(&self, _: &ctxt) -> ~str {
734 self.to_str().to_owned()
735 }
736 }
737
738 impl Repr for ty::Method {
739 fn repr(&self, tcx: &ctxt) -> ~str {
740 format!("method(ident: {}, generics: {}, fty: {}, \
741 explicit_self: {}, vis: {}, def_id: {})",
742 self.ident.repr(tcx),
743 self.generics.repr(tcx),
744 self.fty.repr(tcx),
745 self.explicit_self.repr(tcx),
746 self.vis.repr(tcx),
747 self.def_id.repr(tcx))
748 }
749 }
750
751 impl Repr for ast::Name {
752 fn repr(&self, _tcx: &ctxt) -> ~str {
753 token::get_name(*self).get().to_str()
754 }
755 }
756
757 impl Repr for ast::Ident {
758 fn repr(&self, _tcx: &ctxt) -> ~str {
759 token::get_ident(*self).get().to_str()
760 }
761 }
762
763 impl Repr for ast::ExplicitSelf_ {
764 fn repr(&self, _tcx: &ctxt) -> ~str {
765 format!("{:?}", *self)
766 }
767 }
768
769 impl Repr for ast::Visibility {
770 fn repr(&self, _tcx: &ctxt) -> ~str {
771 format!("{:?}", *self)
772 }
773 }
774
775 impl Repr for ty::BareFnTy {
776 fn repr(&self, tcx: &ctxt) -> ~str {
777 format!("BareFnTy \\{fn_style: {:?}, abi: {}, sig: {}\\}",
778 self.fn_style,
779 self.abi.to_str(),
780 self.sig.repr(tcx))
781 }
782 }
783
784 impl Repr for ty::FnSig {
785 fn repr(&self, tcx: &ctxt) -> ~str {
786 fn_sig_to_str(tcx, self)
787 }
788 }
789
790 impl Repr for typeck::MethodCallee {
791 fn repr(&self, tcx: &ctxt) -> ~str {
792 format!("MethodCallee \\{origin: {}, ty: {}, {}\\}",
793 self.origin.repr(tcx),
794 self.ty.repr(tcx),
795 self.substs.repr(tcx))
796 }
797 }
798
799 impl Repr for typeck::MethodOrigin {
800 fn repr(&self, tcx: &ctxt) -> ~str {
801 match self {
802 &typeck::MethodStatic(def_id) => {
803 format!("MethodStatic({})", def_id.repr(tcx))
804 }
805 &typeck::MethodParam(ref p) => {
806 p.repr(tcx)
807 }
808 &typeck::MethodObject(ref p) => {
809 p.repr(tcx)
810 }
811 }
812 }
813 }
814
815 impl Repr for typeck::MethodParam {
816 fn repr(&self, tcx: &ctxt) -> ~str {
817 format!("MethodParam({},{:?},{:?},{:?})",
818 self.trait_id.repr(tcx),
819 self.method_num,
820 self.param_num,
821 self.bound_num)
822 }
823 }
824
825 impl Repr for typeck::MethodObject {
826 fn repr(&self, tcx: &ctxt) -> ~str {
827 format!("MethodObject({},{:?},{:?})",
828 self.trait_id.repr(tcx),
829 self.method_num,
830 self.real_index)
831 }
832 }
833
834
835 impl Repr for ty::RegionVid {
836 fn repr(&self, _tcx: &ctxt) -> ~str {
837 format!("{:?}", *self)
838 }
839 }
840
841 impl Repr for ty::TraitStore {
842 fn repr(&self, tcx: &ctxt) -> ~str {
843 trait_store_to_str(tcx, *self)
844 }
845 }
846
847 impl Repr for ty::BuiltinBound {
848 fn repr(&self, _tcx: &ctxt) -> ~str {
849 format!("{:?}", *self)
850 }
851 }
852
853 impl UserString for ty::BuiltinBound {
854 fn user_string(&self, _tcx: &ctxt) -> ~str {
855 match *self {
856 ty::BoundStatic => "'static".to_owned(),
857 ty::BoundSend => "Send".to_owned(),
858 ty::BoundSized => "Sized".to_owned(),
859 ty::BoundCopy => "Pod".to_owned(),
860 ty::BoundShare => "Share".to_owned(),
861 }
862 }
863 }
864
865 impl Repr for ty::BuiltinBounds {
866 fn repr(&self, tcx: &ctxt) -> ~str {
867 self.user_string(tcx)
868 }
869 }
870
871 impl Repr for Span {
872 fn repr(&self, tcx: &ctxt) -> ~str {
873 tcx.sess.codemap().span_to_str(*self).to_owned()
874 }
875 }
876
877 impl<A:UserString> UserString for Rc<A> {
878 fn user_string(&self, tcx: &ctxt) -> ~str {
879 let this: &A = &**self;
880 this.user_string(tcx)
881 }
882 }
883
884 impl UserString for ty::BuiltinBounds {
885 fn user_string(&self, tcx: &ctxt) -> ~str {
886 if self.is_empty() { "<no-bounds>".to_owned() } else {
887 let mut result = Vec::new();
888 for bb in self.iter() {
889 result.push(bb.user_string(tcx));
890 }
891 result.connect("+")
892 }
893 }
894 }
895
896 impl UserString for ty::TraitRef {
897 fn user_string(&self, tcx: &ctxt) -> ~str {
898 let base = ty::item_path_str(tcx, self.def_id);
899 if tcx.sess.verbose() && self.substs.self_ty.is_some() {
900 let mut all_tps = self.substs.tps.clone();
901 for &t in self.substs.self_ty.iter() { all_tps.push(t); }
902 parameterized(tcx, base, &self.substs.regions,
903 all_tps.as_slice(), self.def_id, true)
904 } else {
905 parameterized(tcx, base, &self.substs.regions,
906 self.substs.tps.as_slice(), self.def_id, true)
907 }
908 }
909 }
910
911 impl UserString for ty::t {
912 fn user_string(&self, tcx: &ctxt) -> ~str {
913 ty_to_str(tcx, *self)
914 }
915 }
916
917 impl UserString for ast::Ident {
918 fn user_string(&self, _tcx: &ctxt) -> ~str {
919 token::get_name(self.name).get().to_owned()
920 }
921 }
922
923 impl Repr for abi::Abi {
924 fn repr(&self, _tcx: &ctxt) -> ~str {
925 self.to_str()
926 }
927 }
928
929 impl UserString for abi::Abi {
930 fn user_string(&self, _tcx: &ctxt) -> ~str {
931 self.to_str()
932 }
933 }
934
935 impl Repr for ty::UpvarId {
936 fn repr(&self, tcx: &ctxt) -> ~str {
937 format!("UpvarId({};`{}`;{})",
938 self.var_id,
939 ty::local_var_name_str(tcx, self.var_id),
940 self.closure_expr_id)
941 }
942 }
943
944 impl Repr for ast::Mutability {
945 fn repr(&self, _tcx: &ctxt) -> ~str {
946 format!("{:?}", *self)
947 }
948 }
949
950 impl Repr for ty::BorrowKind {
951 fn repr(&self, _tcx: &ctxt) -> ~str {
952 format!("{:?}", *self)
953 }
954 }
955
956 impl Repr for ty::UpvarBorrow {
957 fn repr(&self, tcx: &ctxt) -> ~str {
958 format!("UpvarBorrow({}, {})",
959 self.kind.repr(tcx),
960 self.region.repr(tcx))
961 }
962 }
librustc/util/ppaux.rs:508:1-508:1 -fn- definition:
fn repr_vec<T:Repr>(tcx: &ctxt, v: &[T]) -> ~str {
vec_map_to_str(v, |t| t.repr(tcx))
}
references:- 3528: fn repr(&self, tcx: &ctxt) -> ~str {
529: repr_vec(tcx, self.as_slice())
530: }
librustc/util/ppaux.rs:167:1-167:1 -fn- definition:
pub fn region_to_str(cx: &ctxt, prefix: &str, space: bool, region: Region) -> ~str {
let space_str = if space { " " } else { "" };
if cx.sess.verbose() {
references:- 4273: ty::RegionTraitStore(region, _) => {
274: s.push_str(region_to_str(cx, "", true, region));
275: }
librustc/middle/typeck/check/regionck.rs:
1003: debug!("constrain_regions_in_type(minimum_lifetime={}, ty={})",
1004: region_to_str(tcx, "", false, minimum_lifetime),
1005: ty_to_str(tcx, ty));
librustc/util/ppaux.rs:
419: for &r in regions.iter() {
420: strs.push(region_to_str(cx, "", false, r))
421: }
librustc/util/ppaux.rs:139:1-139:1 -fn- definition:
pub fn bound_region_ptr_to_str(cx: &ctxt, br: BoundRegion) -> ~str {
bound_region_to_str(cx, "&", true, br)
}
references:- 3100: _ => format!("the lifetime {} as defined on",
101: bound_region_ptr_to_str(cx, fr.bound_region))
102: };
librustc/middle/ty.rs:
3362: but found concrete lifetime",
3363: bound_region_ptr_to_str(cx, br))
3364: }
--
3367: but found bound lifetime parameter {}",
3368: bound_region_ptr_to_str(cx, br))
3369: }
librustc/util/ppaux.rs:143:1-143:1 -fn- definition:
pub fn bound_region_to_str(cx: &ctxt,
prefix: &str, space: bool,
br: BoundRegion) -> ~str {
references:- 8182: ty::ReLateBound(_, br) => bound_region_to_str(cx, prefix, space, br),
183: ty::ReFree(ref fr) => bound_region_to_str(cx, prefix, space, fr.bound_region),
184: ty::ReInfer(ReSkolemized(_, br)) => {
185: bound_region_to_str(cx, prefix, space, br)
186: }
librustc/middle/typeck/infer/sub.rs:
179: debug!("Bound region {} skolemized to {:?}",
180: bound_region_to_str(self.get_ref().infcx.tcx, "", false, br),
181: skol);
librustc/middle/typeck/infer/error_reporting.rs:
1225: format!(" for {}in function call",
1226: bound_region_to_str(self.tcx, "lifetime parameter ", true, br))
1227: }
--
1229: format!(" for {}in function type",
1230: bound_region_to_str(self.tcx, "lifetime parameter ", true, br))
1231: }
librustc/middle/typeck/infer/mod.rs:
798: debug!("Bound region {} maps to {:?}",
799: bound_region_to_str(self.tcx, "", false, br),
800: rvar);
librustc/util/ppaux.rs:224:1-224:1 -fn- definition:
pub fn trait_ref_to_str(cx: &ctxt, trait_ref: &ty::TraitRef) -> ~str {
trait_ref.user_string(cx)
}
references:- 6593: fn repr(&self, tcx: &ctxt) -> ~str {
594: trait_ref_to_str(tcx, self)
595: }
librustc/middle/typeck/check/vtable.rs:
207: format!("expected {}, but found {} ({})",
208: ppaux::trait_ref_to_str(tcx, &r_exp_trait_ref),
209: ppaux::trait_ref_to_str(tcx, &r_act_trait_ref),
librustc/middle/typeck/infer/mod.rs:
663: let t = self.resolve_type_vars_in_trait_ref_if_possible(t);
664: trait_ref_to_str(self.tcx, &t)
665: }
librustc/middle/typeck/infer/to_str.rs:
91: fn inf_str(&self, cx: &InferCtxt) -> ~str {
92: trait_ref_to_str(cx.tcx, self)
93: }
librustc/middle/typeck/collect.rs:
1151: token::get_ident(ident),
1152: ppaux::trait_ref_to_str(tcx, &*trait_ref)));
1153: }
librustc/middle/typeck/check/vtable.rs:
208: ppaux::trait_ref_to_str(tcx, &r_exp_trait_ref),
209: ppaux::trait_ref_to_str(tcx, &r_act_trait_ref),
210: ty::type_err_to_str(tcx, err)));
librustc/util/ppaux.rs:35:53-35:53 -trait- definition:
/// Produces a string suitable for debugging output.
pub trait Repr {
fn repr(&self, tcx: &ctxt) -> ~str;
references:- 76librustc/middle/trans/common.rs:
librustc/middle/trans/_match.rs:
librustc/middle/typeck/mod.rs:
librustc/middle/typeck/check/method.rs:
librustc/middle/typeck/infer/mod.rs:
librustc/middle/typeck/infer/region_inference/mod.rs:
librustc/middle/borrowck/mod.rs:
librustc/middle/mem_categorization.rs:
librustc/util/ppaux.rs:203:1-203:1 -fn- definition:
pub fn trait_store_to_str(cx: &ctxt, s: ty::TraitStore) -> ~str {
match s {
ty::UniqTraitStore => "Box ".to_owned(),
references:- 5842: fn repr(&self, tcx: &ctxt) -> ~str {
843: trait_store_to_str(tcx, *self)
844: }
librustc/middle/trans/debuginfo.rs:
2119: let ident_string = token::get_name(last.name());
2120: let name = ppaux::trait_store_to_str(cx.tcx(), trait_store) +
2121: ident_string.get();
librustc/middle/ty.rs:
3371: format!("trait storage differs: expected `{}` but found `{}`",
3372: trait_store_to_str(cx, (*values).expected),
3373: trait_store_to_str(cx, (*values).found))
3374: }
librustc/util/ppaux.rs:228:1-228:1 -fn- definition:
pub fn ty_to_str(cx: &ctxt, typ: t) -> ~str {
fn fn_input_to_str(cx: &ctxt, input: ty::t) -> ~str {
ty_to_str(cx, input)
references:- 108librustc/middle/trans/glue.rs:
librustc/middle/trans/datum.rs:
librustc/middle/trans/consts.rs:
librustc/middle/trans/base.rs:
librustc/middle/trans/closure.rs:
librustc/middle/trans/tvec.rs:
librustc/middle/trans/intrinsic.rs:
librustc/middle/trans/reflect.rs:
librustc/middle/trans/debuginfo.rs:
librustc/middle/trans/adt.rs:
librustc/middle/ty.rs:
librustc/middle/typeck/mod.rs:
librustc/middle/typeck/check/mod.rs:
librustc/middle/typeck/check/regionmanip.rs:
librustc/middle/typeck/check/regionck.rs:
librustc/middle/typeck/check/method.rs:
librustc/middle/typeck/infer/mod.rs:
librustc/middle/typeck/infer/resolve.rs:
librustc/middle/typeck/infer/to_str.rs:
librustc/middle/typeck/collect.rs:
librustc/middle/check_match.rs:
librustc/middle/check_const.rs:
librustc/middle/lint.rs:
librustc/middle/mem_categorization.rs:
librustc/middle/kind.rs:
librustc/middle/astencode.rs:
librustc/middle/effect.rs:
librustc/back/link.rs:
librustc/driver/driver.rs:
librustc/middle/check_match.rs:
librustc/util/ppaux.rs:407:1-407:1 -fn- definition:
pub fn parameterized(cx: &ctxt,
base: &str,
regions: &ty::RegionSubsts,
references:- 6904: } else {
905: parameterized(tcx, base, &self.substs.regions,
906: self.substs.tps.as_slice(), self.def_id, true)
librustc/middle/trans/type_of.rs:
308: };
309: let tstr = ppaux::parameterized(cx.tcx(), ty::item_path_str(cx.tcx(), did),
310: &ty::NonerasedRegions(OwnedSlice::empty()),
librustc/middle/trans/debuginfo.rs:
2122: // Add type and region parameters
2123: let name = ppaux::parameterized(cx.tcx(), name, &substs.regions,
2124: substs.tps.as_slice(), def_id, true);
librustc/util/ppaux.rs:
901: for &t in self.substs.self_ty.iter() { all_tps.push(t); }
902: parameterized(tcx, base, &self.substs.regions,
903: all_tps.as_slice(), self.def_id, true)
librustc/util/ppaux.rs:44:1-44:1 -fn- definition:
pub fn note_and_explain_region(cx: &ctxt,
prefix: &str,
region: ty::Region,
references:- 37librustc/middle/ty.rs:
librustc/middle/typeck/infer/error_reporting.rs:
librustc/middle/borrowck/mod.rs:
librustc/middle/typeck/infer/error_reporting.rs:
librustc/util/ppaux.rs:132:4-132:4 -fn- definition:
fn explain_span(cx: &ctxt, heading: &str, span: Span)
-> (~str, Option<Span>) {
let lo = cx.sess.codemap().lookup_char_pos_adj(span.lo);
references:- 967: Some(ast_map::NodeBlock(ref blk)) => {
68: explain_span(cx, "block", blk.span)
69: }
--
105: Some(ast_map::NodeBlock(ref blk)) => {
106: let (msg, opt_span) = explain_span(cx, "block", blk.span);
107: (format!("{} {}", prefix, msg), opt_span)
--
110: ast::ItemImpl(..) => true, _ => false} => {
111: let (msg, opt_span) = explain_span(cx, "impl", it.span);
112: (format!("{} {}", prefix, msg), opt_span)
librustc/util/ppaux.rs:212:1-212:1 -fn- definition:
pub fn vec_map_to_str<T>(ts: &[T], f: |t: &T| -> ~str) -> ~str {
let tstrs = ts.iter().map(f).collect::<Vec<~str>>();
format!("[{}]", tstrs.connect(", "))
references:- 3509: fn repr_vec<T:Repr>(tcx: &ctxt, v: &[T]) -> ~str {
510: vec_map_to_str(v, |t| t.repr(tcx))
511: }
librustc/middle/trans/_match.rs:
1425: m.repr(bcx.tcx()),
1426: vec_map_to_str(vals, |v| bcx.val_to_str(*v)));
1427: let _indenter = indenter();
librustc/util/ppaux.rs:40:56-40:56 -trait- definition:
/// Produces a string suitable for showing to the user.
pub trait UserString {
fn user_string(&self, tcx: &ctxt) -> ~str;
references:- 10877: impl<A:UserString> UserString for Rc<A> {
878: fn user_string(&self, tcx: &ctxt) -> ~str {
--
929: impl UserString for abi::Abi {
930: fn user_string(&self, _tcx: &ctxt) -> ~str {
librustc/middle/typeck/infer/error_reporting.rs:
108: fn expected_found_str<T:UserString+Resolvable>(
109: &self,
--
383: fn expected_found_str<T:UserString+Resolvable>(
384: &self,
librustc/util/ppaux.rs:
853: impl UserString for ty::BuiltinBound {
854: fn user_string(&self, _tcx: &ctxt) -> ~str {
librustc/util/ppaux.rs:309:4-309:4 -fn- definition:
fn push_sig_to_str(cx: &ctxt,
s: &mut StrBuf,
bra: char,
references:- 3263: push_sig_to_str(cx, &mut s, '(', ')', sig);
--
296: }
297: push_sig_to_str(cx, &mut s, '|', '|', &cty.sig);
298: }
librustc/util/ppaux.rs:192:1-192:1 -fn- definition:
pub fn mutability_to_str(m: ast::Mutability) -> ~str {
match m {
ast::MutMutable => "mut ".to_owned(),
references:- 2200: pub fn mt_to_str(cx: &ctxt, m: &mt) -> ~str {
201: format!("{}{}", mutability_to_str(m.mutbl), ty_to_str(cx, m.ty))
202: }
--
207: ty::RegionTraitStore(r, m) => {
208: format!("{}{}", region_ptr_to_str(cx, r), mutability_to_str(m))
209: }
librustc/util/ppaux.rs:199:1-199:1 -fn- definition:
pub fn mt_to_str(cx: &ctxt, m: &mt) -> ~str {
format!("{}{}", mutability_to_str(m.mutbl), ty_to_str(cx, m.ty))
}
references:- 8350: ty_rptr(r, ref tm) => {
351: region_ptr_to_str(cx, r) + mt_to_str(cx, tm)
352: }
--
400: match sz {
401: Some(n) => format!("[{}, .. {}]", mt_to_str(cx, mt), n),
402: None => format!("[{}]", ty_to_str(cx, mt.ty)),
librustc/middle/typeck/infer/glb.rs:
52: mt_to_str(tcx, a),
53: mt_to_str(tcx, b));
librustc/middle/typeck/infer/lub.rs:
51: mt_to_str(tcx, a),
52: mt_to_str(tcx, b));
librustc/middle/typeck/infer/to_str.rs:
41: fn inf_str(&self, cx: &InferCtxt) -> ~str {
42: mt_to_str(cx.tcx, self)
43: }
librustc/middle/typeck/infer/glb.rs:
51: self.tag(),
52: mt_to_str(tcx, a),
53: mt_to_str(tcx, b));
librustc/util/ppaux.rs:163:31-163:31 -fn- definition:
// `note_and_explain_region()`
pub fn region_ptr_to_str(cx: &ctxt, region: Region) -> ~str {
region_to_str(cx, "&", true, region)
references:- 2207: ty::RegionTraitStore(r, m) => {
208: format!("{}{}", region_ptr_to_str(cx, r), mutability_to_str(m))
209: }
--
350: ty_rptr(r, ref tm) => {
351: region_ptr_to_str(cx, r) + mt_to_str(cx, tm)
352: }