Enable lazy construction of label strings #1041
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TIL scalafmt doesn't do headers. Edit: dropped the scalafmt for further research
One hint is to |
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som-snytt
commented
Mar 16, 2024
| @@ -583,6 +583,8 @@ object GenSpecification extends Properties("Gen") with GenSpecificationVersionSp | |||
| } | |||
| val avg = sum / n | |||
| s"average = $avg" |: avg >= 0.49 && avg <= 0.51 | |||
| s"average = $avg".ensuring(false, "eager evaluation") =|= avg >= 0.49 && avg <= 0.51 | |||
| avg >= 0.49 && avg <= 0.51 =|= s"average = $avg" | |||
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just to exercise the idioms in the absence of tests
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On precedence, the trade-off is the |
mrdziuban
reviewed
Mar 22, 2024
| * The label is evaluated lazily. The operator name is chosen for its precedence btween boolean operators and | ||
| * others. | ||
| */ | ||
| def =|=(label: => String): Prop = prop.map(_.label(label)) |
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Another part of my PR (#979) was to avoid evaluating the label if it will never be displayed to the user. What do you think about doing the same here?
def =|=(label: => String): Prop =
prop.map(r =>
r.status match {
case Prop.False | Prop.Exception(_) => r.label(l)
case Prop.Proof | Prop.True | Prop.Undecided => r
})| * | ||
| * The operator name is chosen for its precedence between boolean operators and others. | ||
| */ | ||
| extension (prop: Prop) def =|=(label: => String): Prop = prop.map(_.label(label)) |
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Does Scala 3 not need an extension for Boolean like the Scala 2 version?
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@satorg @som-snytt do you have any thoughts on moving this or #979 forward? |
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A different take on #979
Instead of recycling
|:for labeling, use=|=for improved symmetry and operator precedence.A second commit follows up scalafmt config by "fixing" star alignment in doc comments. Edit: That hassle is reserved for another effort.