org.scalactic.anyvals.DigitStringMacro.scala Maven / Gradle / Ivy

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/*
* Copyright 2001-2014 Artima, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.scalactic.anyvals

import reflect.macros.Context
import org.scalactic.Resources

import CompileTimeAssertions._
private[scalactic] object DigitStringMacro {
  def apply(c: Context)(value: c.Expr[String]): c.Expr[DigitString] = {
    val notValidMsg =
      "DigitString.apply can only be invoked on String literals that contain all decimal digits ('0' through '9'), " +
      "like \"123\"."
    val notLiteralMsg =
      "DigitString.apply can only be invoked on String literals that contain all decimal digits ('0' through '9'), like \"123\"" +
      " Please use DigitString.from instead."
    ensureValidStringLiteral(c)(value, notValidMsg, notLiteralMsg) { s =>
      s.forall(c => c >= '0' && c <= '9') 
    }
    c.universe.reify { DigitString.from(value.splice).get }
  } 
}