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Colby Mchenry
bb8a0f732b
When several files declare a name a C or C++ test uses, the test now links
to one its translation unit declares, when there is one: a definition in its
own file, in a file it includes (directly or through other includes), or in
the source file that implements such a header (the same-stem file that
includes it), unless that source keeps the definition to itself (a `static`,
an unnamed namespace, a class it declares). Before, the candidates were
ranked by directory and index order, so a test took whichever namesake came
first:
- protobuf's C# generator tests called test_util2.h's
`TestUtil::TestSourceDir()`, a test suite they never include, instead of
the `TestSourceDir()` googletest.h declares;
- protobuf's upb and hpb tests left `upb_Arena_New()` and the rest of upb's
C API unlinked: the copies bundled for PHP and Ruby won the ranking and
were then rejected;
- rocksdb's c_test.c left `rocksdb_open()` and the rest of the C API in
db/c.cc unlinked, and its histogram test's `clock->SleepForMicroseconds()`
went to emulated_clock.h's `EmulatedSystemClock`, which it doesn't include.
The narrowing applies to test files only, to the exact-name strategy, typed
receivers (resolveMethodOnType), and the class-name and receiver-word
strategies of matchMethodCall. When the translation unit declares none of
the candidates, as when a test's includes don't resolve (jemalloc's tests
include a generated header), the candidates stay as they were. A name a
test writes alone (no receiver, no qualifier) is narrowed only to what C++
finds for it outside a class: a function, a namespace-scope type or a
constructor, never another class's method or nested type, and a call the
extractor recorded without the receiver it is written on is left as it
was. The qualified-name strategy is unchanged.
Validated on main 3695818f (site-keyed edge diffs, every group triaged):
rocksdb +1,442 / 47 retargeted / -12, protobuf +2,316 / 55 / -67,
fmt +33 / 40, breakpad +13 / 14, glog +22, leveldb +10, llm.c 6
retargeted; jq, tokio, excalidraw, okhttp and typeorm byte-identical.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>