float_cmp changes - #11948
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r? clippy |
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Hey @Jarcho woudl you mind rebasing this PR? Hey @GuillaumeGomez, if you have the time, could you give this PR a review? r? xFrednet |
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`float_cmp` changes fixes #2834 fixes #6816 --- changelog: This: * Deprecated `float_cmp_const` in favor of a config option on [`float_cmp`]. [#11948](#11948) * [`float_cmp`]: Don't lint literal and self comparisons. [#11948](#11948) * [`float_cmp`] [#11948](#11948) * Add the [`float-cmp-ignore-named-constants`] configuration to ignore comparisons to named constants. * Add the [`float-cmp-ignore-change-detection`] configuration to ignore const-evaluatabled values. * Add the [`float-cmp-ignore-constant-comparisons`] configuration to ignore comparisons to the modification of an operand (e.g. `x == f(x)`).
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…constants to `float_cmp`
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Latest commit changes named constants to be allowed individually rather than as a group. This feature was originally added to allow comparisons to a sentinel value rather than constants in general. |
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One comment and then I'd say it's good to go :D
| /// x == VALUE | ||
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| /// ``` | ||
| (float_cmp_allowed_constants: Vec<String> = Vec::new()), |
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I would suggest adding "*" as a magic value that says that all constants are allowed. THis should also be documented.
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This would be better done in a more uniform way across all the multi-value configs.
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While true, I'm not sure how many lints would benefit from an everything "*" configuration. #12571 comes to mind, where I also suggested this with a Zulip thread.
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An alternative to the current configs would be to have a single heuristics config taking a list of names. e.g. float_cmp_heuristics = ["constant_cmp", "change_detection", "signum_cmp", "cmp_zero"]This would make it possible to preemptively disable future heuristics as well as an easier way to disable all of them. |
Having heuristics as strings in a list feels weird to me. They should be boolean flags IMO. That also makes it easier for format error reporting etc |
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fixes #2834
fixes #6816
changelog: This:
float_cmp_constin favor of a config option on [float_cmp].#11948
float_cmp] #11948float-cmp-ignore-named-constants] configuration to ignore comparisons to named constants.float-cmp-ignore-change-detection] configuration to ignore const-evaluatabled values.float-cmp-ignore-constant-comparisons] configuration to ignore comparisons to the modification of an operand (e.g.x == f(x)).