The YAML test helpers didn't use the `Printable` abstraction in one
place and instead directly used `<<` with a `std::ostream`. This matches
the `require`s expression in the `error_test_helpers.h` printing logic
for `ErrorOr`, but fails to provide the necessary implementation for
`llvm::formatv` to succeed with the `Yaml::Value` type.
The main fix is to use `Printable` and to define the `Print` method in
terms of `llvm::raw_ostream`. We already have all the mapping hooks in
place to also support `std::ostream` when needed based on that
definition.
This also adds some constraints to the printing in
`error_test_helpers.h` so it is a bit less under-constrained and more
understandable when it is correctly being used. These are just tidying
though, they aren't what makes these headers work together.
I've added a test to try and make sure these test helpers compose as
well.
This adds a RawStringOstream. Versus TestRawOstream, which is
consolidated over to RawStringOstream, it uses a string for storage
instead of a vector, mainly to support move-to-string semantics. Versus
llvm::raw_string_ostream, it owns the string and supports pwrite (which
is needed for driver and its fd_ostream compatibility requirement).
This converts most uses of llvm::raw_string_ostream, leaving behind a
few in InstNamer that explicitly cannot own the string, such as:
```
llvm::raw_string_ostream(name)
<< "_" << tree.tokens().GetColumnNumber(token);
```
I have this as its own library so that it can use CHECK.
Yes this doesn't save much code, but it's code we repeatedly write.
---------
Co-authored-by: Geoff Romer <gromer@google.com>
I was wondering, instead of treating `misc` differently and enabling
specific checks, maybe we can flip that since we actually seem okay with
most of the checks?
The main check I'm enabling, with significant edits here, is
`misc-no-recursion`. But maybe this is helpful to enable, even with the
necessary NOLINTs, since we want to avoid recursion in the toolchain?
This PR shows some example fixes in subst.cpp (which are more stylistic,
since the code shouldn't actually have recursed due to its structure; I
think we could remove the warning on TryResolveInst the same way). Some
also just don't seem worth fixing, like those in tests files (I didn't
see a way to exclude files in .clang-tidy, so instead I'm using
NOLINTBEGIN). But I think we might actually want to fix inst_namer, and
there's enough in convert that I didn't look closely.
Also, I made some protected -> private style fixes based on
`misc-non-private-member-variables-in-classes` (this is also how I
noticed `class Real` versus `struct Real`). With node_stack, it looks
like the `protected` wasn't even used. [Per
style](https://google.github.io/styleguide/cppguide.html#Access_Control),
data members should be private outside tests. But since we can't
trivially exclude `protected` members in tests, I'm turning it off -- I
don't view it as offering enough benefit on the whole.
migrate_cpp issues are preexisting (I believe we just aren't monitoring
it), but changes there make `bazel build --config=clang-tidy -k //...`
work cleanly.
---------
Co-authored-by: Richard Smith <richard@metafoo.co.uk>
Previous code could fail silently, only caught with yaml output
mismatches. This uses ErrorOr to be explicit about the error detection;
recovery isn't supported because we should only print valid yaml (in
tests, at least).
Also moves the test helpers from //toolchain/base to
//toolchain/testing.
Switches tree_test to use the matchers so that, on mismatch, gtest
prints a path to the mismatch (the straight value means it was just
printing "not equal").
Addresses
https://github.com/carbon-language/carbon-lang/pull/3217#discussion_r1323586836
Chandler Carruth
Thomas Köppe
Jon Ross-PerkinsandGeoff Romer
