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Warn about unreachable code.

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This commit is contained in:
Daniel Kirchner
2019-01-10 10:36:50 +01:00
parent 63319cfdcd
commit 0dfd4a726e
27 changed files with 258 additions and 12 deletions
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liblangutil/SourceLocation.h
+20
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@@ -49,6 +49,26 @@ struct SourceLocation
bool isEmpty() const { return start == -1 && end == -1; }
/// @returns the smallest SourceLocation that contains both @param _a and @param _b.
/// Assumes that @param _a and @param _b refer to the same source (exception: if the source of either one
/// is unset, the source of the other will be used for the result, even if that is unset as well).
/// Invalid start and end positions (with value of -1) are ignored (if start or end are -1 for both @param _a and
/// @param _b, then start resp. end of the result will be -1 as well).
static SourceLocation smallestCovering(SourceLocation _a, SourceLocation const& _b)
{
if (!_a.source)
_a.source = _b.source;
if (_a.start < 0)
_a.start = _b.start;
else if (_b.start >= 0 && _b.start < _a.start)
_a.start = _b.start;
if (_b.end > _a.end)
_a.end = _b.end;
return _a;
}
int start = -1;
int end = -1;
std::shared_ptr<CharStream> source;