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Caret.scala
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Caret.scala
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/*
* Copyright (c) 2021 Typelevel
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package cats.parse
import cats.Order
/** This is a pointer to a zero based line, column, and total offset.
*/
case class Caret(line: Int, col: Int, offset: Int)
object Caret {
val Start: Caret = Caret(0, 0, 0)
/** This order is the same as offset order if the Carets are both from the same input string, but
* if from different ones will compare by line then by column and finally by offset.
*/
implicit val caretOrder: Order[Caret] =
new Order[Caret] {
def compare(left: Caret, right: Caret): Int = {
val c0 = Integer.compare(left.line, right.line)
if (c0 != 0) c0
else {
val c1 = Integer.compare(left.col, right.col)
if (c1 != 0) c1
else Integer.compare(left.offset, right.offset)
}
}
}
implicit val caretOrdering: Ordering[Caret] =
caretOrder.toOrdering
}