/
Example.scala
81 lines (70 loc) · 2.97 KB
/
Example.scala
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/*
* Copyright (c) 2021, Daniel Spiewak
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package common
import scala.collection.compat.immutable.LazyList
import scala.io.Source
import com.codecommit.gll._
trait Example[A] extends Parsers {
def main(args: Array[String]): Unit = {
for (file <- args) {
println(file)
println("=============================")
val results = parser(LineStream(Source fromFile file))
if (results exists { _.isInstanceOf[Success[A]] }) {
handleSuccesses(results collect { case Success(tree, _) => tree })
} else {
val sorted = results.toList sortWith { _.tail.length < _.tail.length }
val length = sorted.head.tail.length
sorted.takeWhile(_.tail.length == length) collect {
case Failure(msg, tail) =>
val pattern = " error:%%d: %s%n %%s%n %%s%n".format(msg)
tail.printError(pattern)(System.err)
}
}
println()
}
}
def test(file: String): Boolean = {
val src = Source.fromInputStream(getClass().getResourceAsStream(file))
val results: LazyList[Result[A]] = parser(LineStream(src))
if (results exists { _.isInstanceOf[Success[A]] }) {
// suppress stdout:
val stream = new java.io.ByteArrayOutputStream()
Console.withOut(stream) {
handleSuccesses(results collect { case Success(tree, _) => tree })
}
return true
} else {
return false
}
}
def parser: Parser[A]
def handleSuccesses(forest: LazyList[A]): Unit
}