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体验新版 GitCode,发现更多精彩内容 >>
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e475a69f
编写于
5月 03, 2022
作者:
C
Camille GILLOT
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差异文件
Reword create_def comment.
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e912c8df
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+13
-6
compiler/rustc_middle/src/ty/context.rs
compiler/rustc_middle/src/ty/context.rs
+13
-6
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compiler/rustc_middle/src/ty/context.rs
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e475a69f
...
...
@@ -1470,21 +1470,28 @@ pub fn def_path_debug_str(self, def_id: DefId) -> String {
/// Create a new definition within the incr. comp. engine.
pub
fn
create_def
(
self
,
parent
:
LocalDefId
,
data
:
hir
::
definitions
::
DefPathData
)
->
LocalDefId
{
// The following call has the side effect of modifying the tables inside `definitions`.
// These very tables are relied on by the incr. comp. engine to decode DepNodes and to
// decode the on-disk cache.
let
def_id
=
self
.definitions
.write
()
.create_def
(
parent
,
data
);
// This function modifies `self.definitions` using a side-effect.
// We need to ensure that these side effects are re-run by the incr. comp. engine.
// Depending on the forever-red node will tell the graph that the calling query
// needs to be re-evaluated.
use
rustc_query_system
::
dep_graph
::
DepNodeIndex
;
self
.dep_graph
.read_index
(
DepNodeIndex
::
FOREVER_RED_NODE
);
// The following call has the side effect of modifying the tables inside `definitions`.
// These very tables are relied on by the incr. comp. engine to decode DepNodes and to
// decode the on-disk cache.
//
// Any LocalDefId which is used within queries, either as key or result, either:
// - has been created before the construction of the TyCtxt;
// - has been created by this call to `create_def`.
// As a consequence, this LocalDefId is always re-created before it is needed by the incr.
// comp. engine itself.
def_id
//
// This call also writes to the value of `source_span` and `expn_that_defined` queries.
// This is fine because:
// - those queries are `eval_always` so we won't miss their result changing;
// - this write will have happened before these queries are called.
self
.definitions
.write
()
.create_def
(
parent
,
data
)
}
pub
fn
iter_local_def_id
(
self
)
->
impl
Iterator
<
Item
=
LocalDefId
>
+
'tcx
{
...
...
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