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-rw-r--r--gcc/tree.def11
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/tree.def b/gcc/tree.def
index ef103cdba50..bde59b7016c 100644
--- a/gcc/tree.def
+++ b/gcc/tree.def
@@ -371,6 +371,17 @@ DEFTREECODE (MEMORY_PARTITION_TAG, "memory_partition_tag", tcc_declaration, 0)
_DECLs, providing a hierarchy of names. */
DEFTREECODE (NAMESPACE_DECL, "namespace_decl", tcc_declaration, 0)
+/* A declaration import.
+ The C++ FE uses this to represent a using-directive; eg:
+ "using namespace foo".
+ But it could be used to represent any declaration import construct.
+ Whenever a declaration import appears in a lexical block, the BLOCK node
+ representing that lexical block in GIMPLE will contain an IMPORTED_DECL
+ node, linked via BLOCK_VARS accessor of the said BLOCK.
+ For a given NODE which code is IMPORTED_DECL,
+ IMPORTED_DECL_ASSOCIATED_DECL (NODE) accesses the imported declaration. */
+DEFTREECODE (IMPORTED_DECL, "imported_decl", tcc_declaration, 0)
+
/* A translation unit. This is not technically a declaration, since it
can't be looked up, but it's close enough. */
DEFTREECODE (TRANSLATION_UNIT_DECL, "translation_unit_decl",\