abseil-duration-unnecessary-conversion

查找并修复将 absl::Duration 值转换为数字类型然后再转换回来的情况。

浮点数示例

// Original - Conversion to double and back again
absl::Duration d1;
absl::Duration d2 = absl::Seconds(absl::ToDoubleSeconds(d1));

// Suggestion - Remove unnecessary conversions
absl::Duration d2 = d1;

// Original - Division to convert to double and back again
absl::Duration d2 = absl::Seconds(absl::FDivDuration(d1, absl::Seconds(1)));

// Suggestion - Remove division and conversion
absl::Duration d2 = d1;

整数示例

// Original - Conversion to integer and back again
absl::Duration d1;
absl::Duration d2 = absl::Hours(absl::ToInt64Hours(d1));

// Suggestion - Remove unnecessary conversions
absl::Duration d2 = d1;

// Original - Integer division followed by conversion
absl::Duration d2 = absl::Seconds(d1 / absl::Seconds(1));

// Suggestion - Remove division and conversion
absl::Duration d2 = d1;

解包标量运算

// Original - Multiplication by a scalar
absl::Duration d1;
absl::Duration d2 = absl::Seconds(absl::ToInt64Seconds(d1) * 2);

// Suggestion - Remove unnecessary conversion
absl::Duration d2 = d1 * 2;

注意：如果值未与转换比例对齐，则转换为整数然后再转换为 absl::Duration 可能是截断操作。在极少数情况下，如果这是预期的结果，调用者应使用 absl::Trunc 显式截断。