[libc++] Clean up test_iterators.h. NFCI.

The majority of the changes here are whitespace.
Also simplify `ThrowingIterator`'s bookkeeping (NFC).
Also move some free operators into hidden friends, for sanity's sake.
Also `=delete` some more comma operators.
Also use `constexpr` in C++20 instead of `TEST_CONSTEXPR_CXX14`.

Differential Revision: https://reviews.llvm.org/D103341
This commit is contained in:
Arthur O'Dwyer 2021-09-04 12:48:10 -04:00
parent f3472ad5c5
commit 7ba3627b54
1 changed files with 301 additions and 361 deletions

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