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Commit 4f020d5

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Merge pull request #507 from peteraldous/position-equality
2 parents f1e3836 + 11e08c6 commit 4f020d5

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‎shared/src/main/scala/scala/util/parsing/input/Position.scala

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@@ -60,4 +60,16 @@ trait Position {
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this.line < that.line ||
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this.line == that.line && this.column < that.column
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}
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/** Compare this position to another, checking for equality.
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*
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* @param `that` a `Position` to compare to this `Position`
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* @return true if the line numbers and column numbers are equal.
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*/
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override def equals(other: Any) = {
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other match {
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case that: Position => this.line == that.line && this.column == that.column
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case _ => false
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}
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}
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}
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package scala.util.parsing.combinator
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import java.io.StringReader
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import scala.util.parsing.combinator.Parsers
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import scala.util.parsing.input.StreamReader
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import org.junit.Test
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import org.junit.Assert.{ assertEquals, fail }
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class LongestMatchTest {
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class TestParsers extends Parsers {
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type Elem = Char
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def ab: Parser[String] = 'a' ~ 'b' ^^^ "ab"
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def a: Parser[String] = 'a' ^^^ "a"
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def ab_alt: Parser[String] = 'a' ~ 'b' ^^^ "alt"
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}
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@Test
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def longestMatchFirst: Unit = {
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val tParsers = new TestParsers
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val reader = StreamReader(new StringReader("ab"))
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val p = tParsers.ab ||| tParsers.a
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p(reader) match {
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case tParsers.Success(result, _) => assertEquals("ab", result)
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case _ => fail()
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}
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}
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@Test
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def longestMatchSecond: Unit = {
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val tParsers = new TestParsers
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val reader = StreamReader(new StringReader("ab"))
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val p = tParsers.a ||| tParsers.ab
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p(reader) match {
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case tParsers.Success(result, _) => assertEquals("ab", result)
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case _ => fail()
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}
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}
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@Test
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def tieGoesToFirst: Unit = {
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val tParsers = new TestParsers
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val reader = StreamReader(new StringReader("ab"))
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val p = tParsers.ab ||| tParsers.ab_alt
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p(reader) match {
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case tParsers.Success(result, _) => assertEquals("ab", result)
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case _ => fail()
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}
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}
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}

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