forked from OSchip/llvm-project
37 lines
1.3 KiB
ReStructuredText
37 lines
1.3 KiB
ReStructuredText
.. title:: clang-tidy - abseil-duration-subtraction
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abseil-duration-subtraction
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===========================
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Checks for cases where subtraction should be performed in the
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``absl::Duration`` domain. When subtracting two values, and the first one is
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known to be a conversion from ``absl::Duration``, we can infer that the second
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should also be interpreted as an ``absl::Duration``, and make that inference
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explicit.
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Examples:
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.. code-block:: c++
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// Original - Subtraction in the double domain
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double x;
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absl::Duration d;
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double result = absl::ToDoubleSeconds(d) - x;
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// Suggestion - Subtraction in the absl::Duration domain instead
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double result = absl::ToDoubleSeconds(d - absl::Seconds(x));
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// Original - Subtraction of two Durations in the double domain
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absl::Duration d1, d2;
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double result = absl::ToDoubleSeconds(d1) - absl::ToDoubleSeconds(d2);
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// Suggestion - Subtraction in the absl::Duration domain instead
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double result = absl::ToDoubleSeconds(d1 - d2);
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Note: As with other ``clang-tidy`` checks, it is possible that multiple fixes
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may overlap (as in the case of nested expressions), so not all occurences can
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be transformed in one run. In particular, this may occur for nested subtraction
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expressions. Running ``clang-tidy`` multiple times will find and fix these
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overlaps.
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