Commit Graph

2 Commits

Author SHA1 Message Date
Justin Lebar b17269da75 Fix warnings in ImmutableSetTest and SequenceTest.
Doing "I++" inside of an EXPECT_* triggers

  warning: expression with side effects has no effect in an unevaluated context

because EXPECT_* partially expands to

  EqHelper<(sizeof(::testing::internal::IsNullLiteralHelper(i++)) == 1)>

which is an unevaluated context.

llvm-svn: 275717
2016-07-17 18:10:30 +00:00
Chandler Carruth d1ad58b196 [ADT] Add an 'llvm::seq' function which produces an iterator range over
a sequence of values.

It increments through the values in the half-open range: [Begin, End),
producing those values when indirecting the iterator. It should support
integers, iterators, and any other type providing these basic arithmetic
operations.

This came up in the C++ standards committee meeting, and it seemed like
a useful construct that LLVM might want as well, and I wanted to
understand how easily we could solve it. I suspect this can be used to
write simpler counting loops even in LLVM along the lines of:

  for (int i : seq(0, v.size())) {
    ...
  };

As part of this, I had to fix the lack of a proxy object returned from
the operator[] in our iterator facade.

Differential Revision: http://reviews.llvm.org/D17870

llvm-svn: 269390
2016-05-13 03:57:50 +00:00