1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
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.
11 // Type Names for Debug Info.
13 use common
::CrateContext
;
14 use rustc
::hir
::def_id
::DefId
;
15 use rustc
::ty
::subst
::Substs
;
16 use rustc
::ty
::{self, Ty}
;
20 // Compute the name of the type as it should be stored in debuginfo. Does not do
21 // any caching, i.e. calling the function twice with the same type will also do
22 // the work twice. The `qualified` parameter only affects the first level of the
23 // type name, further levels (i.e. type parameters) are always fully qualified.
24 pub fn compute_debuginfo_type_name
<'a
, 'tcx
>(cx
: &CrateContext
<'a
, 'tcx
>,
28 let mut result
= String
::with_capacity(64);
29 push_debuginfo_type_name(cx
, t
, qualified
, &mut result
);
33 // Pushes the name of the type as it should be stored in debuginfo on the
34 // `output` String. See also compute_debuginfo_type_name().
35 pub fn push_debuginfo_type_name
<'a
, 'tcx
>(cx
: &CrateContext
<'a
, 'tcx
>,
38 output
: &mut String
) {
40 ty
::TyBool
=> output
.push_str("bool"),
41 ty
::TyChar
=> output
.push_str("char"),
42 ty
::TyStr
=> output
.push_str("str"),
43 ty
::TyNever
=> output
.push_str("!"),
44 ty
::TyInt(int_ty
) => output
.push_str(int_ty
.ty_to_string()),
45 ty
::TyUint(uint_ty
) => output
.push_str(uint_ty
.ty_to_string()),
46 ty
::TyFloat(float_ty
) => output
.push_str(float_ty
.ty_to_string()),
47 ty
::TyAdt(def
, substs
) => {
48 push_item_name(cx
, def
.did
, qualified
, output
);
49 push_type_params(cx
, substs
, output
);
51 ty
::TyTuple(component_types
) => {
53 for &component_type
in component_types
{
54 push_debuginfo_type_name(cx
, component_type
, true, output
);
55 output
.push_str(", ");
57 if !component_types
.is_empty() {
63 ty
::TyBox(inner_type
) => {
64 output
.push_str("Box<");
65 push_debuginfo_type_name(cx
, inner_type
, true, output
);
68 ty
::TyRawPtr(ty
::TypeAndMut { ty: inner_type, mutbl }
) => {
71 hir
::MutImmutable
=> output
.push_str("const "),
72 hir
::MutMutable
=> output
.push_str("mut "),
75 push_debuginfo_type_name(cx
, inner_type
, true, output
);
77 ty
::TyRef(_
, ty
::TypeAndMut { ty: inner_type, mutbl }
) => {
79 if mutbl
== hir
::MutMutable
{
80 output
.push_str("mut ");
83 push_debuginfo_type_name(cx
, inner_type
, true, output
);
85 ty
::TyArray(inner_type
, len
) => {
87 push_debuginfo_type_name(cx
, inner_type
, true, output
);
88 output
.push_str(&format
!("; {}", len
));
91 ty
::TySlice(inner_type
) => {
93 push_debuginfo_type_name(cx
, inner_type
, true, output
);
96 ty
::TyTrait(ref trait_data
) => {
97 let principal
= cx
.tcx().erase_late_bound_regions_and_normalize(
98 &trait_data
.principal
);
99 push_item_name(cx
, principal
.def_id
, false, output
);
100 push_type_params(cx
, principal
.substs
, output
);
102 ty
::TyFnDef(.., &ty
::BareFnTy{ unsafety, abi, ref sig }
) |
103 ty
::TyFnPtr(&ty
::BareFnTy{ unsafety, abi, ref sig }
) => {
104 if unsafety
== hir
::Unsafety
::Unsafe
{
105 output
.push_str("unsafe ");
108 if abi
!= ::abi
::Abi
::Rust
{
109 output
.push_str("extern \"");
110 output
.push_str(abi
.name());
111 output
.push_str("\" ");
114 output
.push_str("fn(");
116 let sig
= cx
.tcx().erase_late_bound_regions_and_normalize(sig
);
117 if !sig
.inputs
.is_empty() {
118 for ¶meter_type
in &sig
.inputs
{
119 push_debuginfo_type_name(cx
, parameter_type
, true, output
);
120 output
.push_str(", ");
127 if !sig
.inputs
.is_empty() {
128 output
.push_str(", ...");
130 output
.push_str("...");
136 if !sig
.output
.is_nil() {
137 output
.push_str(" -> ");
138 push_debuginfo_type_name(cx
, sig
.output
, true, output
);
141 ty
::TyClosure(..) => {
142 output
.push_str("closure");
146 ty
::TyProjection(..) |
149 bug
!("debuginfo: Trying to create type name for \
150 unexpected type: {:?}", t
);
154 fn push_item_name(cx
: &CrateContext
,
157 output
: &mut String
) {
159 output
.push_str(&cx
.tcx().crate_name(def_id
.krate
));
160 for path_element
in cx
.tcx().def_path(def_id
).data
{
161 output
.push_str("::");
162 output
.push_str(&path_element
.data
.as_interned_str());
165 output
.push_str(&cx
.tcx().item_name(def_id
).as_str());
169 // Pushes the type parameters in the given `Substs` to the output string.
170 // This ignores region parameters, since they can't reliably be
171 // reconstructed for items from non-local crates. For local crates, this
172 // would be possible but with inlining and LTO we have to use the least
173 // common denominator - otherwise we would run into conflicts.
174 fn push_type_params
<'a
, 'tcx
>(cx
: &CrateContext
<'a
, 'tcx
>,
175 substs
: &Substs
<'tcx
>,
176 output
: &mut String
) {
177 if substs
.types().next().is_none() {
183 for type_parameter
in substs
.types() {
184 push_debuginfo_type_name(cx
, type_parameter
, true, output
);
185 output
.push_str(", ");