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Introduce minWithOrNull and maxWithOrNull extension functions #KT-38854

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This commit is contained in:
Abduqodiri Qurbonzoda
2020-06-16 00:59:24 +03:00
parent 194791a168
commit 16b62b8e65
11 changed files with 545 additions and 317 deletions
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libraries/tools/kotlin-stdlib-gen/src/templates/Aggregates.kt
+47 -65
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@@ -448,74 +448,56 @@ object Aggregates : TemplateGroupBase() {
yield(def(op, nullable))
}
val f_minWith = fn("minWith(comparator: Comparator<in T>)") {
includeDefault()
include(Maps, CharSequences, ArraysOfUnsigned)
} builder {
doc { "Returns the first ${f.element} having the smallest value according to the provided [comparator] or `null` if there are no ${f.element.pluralize()}." }
returns("T?")
body {
"""
val iterator = iterator()
if (!iterator.hasNext()) return null
val f_minMaxWith = sequence {
fun def(op: String, nullable: Boolean, orNull: String = "OrNull".ifOrEmpty(nullable)) =
fn("$op$orNull(comparator: Comparator<in T>)") {
includeDefault()
include(Maps, CharSequences, ArraysOfUnsigned)
} builder {
specialFor(Maps) { if (op == "maxWith" || nullable) inlineOnly() }
returns("T?")
var min = iterator.next()
while (iterator.hasNext()) {
val e = iterator.next()
if (comparator.compare(min, e) > 0) min = e
if (!nullable) {
deprecate(Deprecation("Use ${op}OrNull instead.", "${op}OrNull(comparator)", DeprecationLevel.WARNING))
body { "return ${op}OrNull(comparator)" }
return@builder
}
since("1.4")
doc { "Returns the first ${f.element} having the ${if (op == "maxWith") "largest" else "smallest"} value according to the provided [comparator] or `null` if there are no ${f.element.pluralize()}." }
val (acc, cmp) = if (op == "minWith") Pair("min", ">") else Pair("max", "<")
body {
"""
val iterator = iterator()
if (!iterator.hasNext()) return null
var $acc = iterator.next()
while (iterator.hasNext()) {
val e = iterator.next()
if (comparator.compare($acc, e) $cmp 0) $acc = e
}
return $acc
"""
}
body(CharSequences, ArraysOfObjects, ArraysOfPrimitives, ArraysOfUnsigned) {
"""
if (isEmpty()) return null
var $acc = this[0]
for (i in 1..lastIndex) {
val e = this[i]
if (comparator.compare($acc, e) $cmp 0) $acc = e
}
return $acc
"""
}
body(Maps) { "return entries.$op$orNull(comparator)" }
}
return min
"""
}
body(CharSequences, ArraysOfObjects, ArraysOfPrimitives, ArraysOfUnsigned) {
"""
if (isEmpty()) return null
var min = this[0]
for (i in 1..lastIndex) {
val e = this[i]
if (comparator.compare(min, e) > 0) min = e
}
return min
"""
}
body(Maps) { "return entries.minWith(comparator)" }
}
val f_maxWith = fn("maxWith(comparator: Comparator<in T>)") {
includeDefault()
include(Maps, CharSequences, ArraysOfUnsigned)
} builder {
doc { "Returns the first ${f.element} having the largest value according to the provided [comparator] or `null` if there are no ${f.element.pluralize()}." }
returns("T?")
body {
"""
val iterator = iterator()
if (!iterator.hasNext()) return null
var max = iterator.next()
while (iterator.hasNext()) {
val e = iterator.next()
if (comparator.compare(max, e) < 0) max = e
}
return max
"""
}
body(CharSequences, ArraysOfObjects, ArraysOfPrimitives, ArraysOfUnsigned) {
"""
if (isEmpty()) return null
var max = this[0]
for (i in 1..lastIndex) {
val e = this[i]
if (comparator.compare(max, e) < 0) max = e
}
return max
"""
}
specialFor(Maps) {
inlineOnly()
body { "return entries.maxWith(comparator)" }
}
for (op in listOf("minWith", "maxWith"))
for (nullable in listOf(false, true))
yield(def(op, nullable))
}
fun f_minMaxOf() = sequence {