forked from OSchip/llvm-project
40 lines
992 B
ReStructuredText
40 lines
992 B
ReStructuredText
.. title:: clang-tidy - bugprone-integer-division
|
|
|
|
bugprone-integer-division
|
|
=========================
|
|
|
|
Finds cases where integer division in a floating point context is likely to
|
|
cause unintended loss of precision.
|
|
|
|
No reports are made if divisions are part of the following expressions:
|
|
|
|
- operands of operators expecting integral or bool types,
|
|
- call expressions of integral or bool types, and
|
|
- explicit cast expressions to integral or bool types,
|
|
|
|
as these are interpreted as signs of deliberateness from the programmer.
|
|
|
|
Examples:
|
|
|
|
.. code-block:: c++
|
|
|
|
float floatFunc(float);
|
|
int intFunc(int);
|
|
double d;
|
|
int i = 42;
|
|
|
|
// Warn, floating-point values expected.
|
|
d = 32 * 8 / (2 + i);
|
|
d = 8 * floatFunc(1 + 7 / 2);
|
|
d = i / (1 << 4);
|
|
|
|
// OK, no integer division.
|
|
d = 32 * 8.0 / (2 + i);
|
|
d = 8 * floatFunc(1 + 7.0 / 2);
|
|
d = (double)i / (1 << 4);
|
|
|
|
// OK, there are signs of deliberateness.
|
|
d = 1 << (i / 2);
|
|
d = 9 + intFunc(6 * i / 32);
|
|
d = (int)(i / 32) - 8;
|