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// Copyright (c) 2011-2015 ScalaMock Contributors (https://github.com/paulbutcher/ScalaMock/graphs/contributors)
//
// 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 org.scalamock.clazz
import org.scalamock.util.{MacroAdapter, MacroUtils}
object MockFunctionFinder {
import MacroAdapter.Context
/**
* Given something of the structure <|o.m _|> where o is a mock object
* and m is a method, find the corresponding MockFunction instance
*/
def findMockFunction[F: c.WeakTypeTag, M: c.WeakTypeTag](c: Context)(f: c.Expr[F], actuals: List[c.universe.Type]): c.Expr[M] = {
import c.universe._
val utils = new MacroUtils[c.type](c)
import utils._
// todo: JS implementation is needed here
// mock.getClass().getMethod(name).invoke(obj).asInstanceOf[MockFunctionX[...]]
def mockedFunctionGetter(obj: Tree, name: Name, targs: List[Type]): c.Expr[M] = {
// val method = applyOn(applyOn(obj, "getClass"), "getMethod", literal(mockFunctionName(name, obj.tpe, targs)))
// val r = c.Expr[M](castTo(applyOn(method, "invoke", obj), weakTypeOf[M]))
MockFunctionFinderImpl.mockedFunctionGetter[M](c)(obj, name, targs, actuals)
}
def transcribeTree(tree: Tree, targs: List[Type] = Nil): c.Expr[M] = {
tree match {
case Select(qualifier, name) => mockedFunctionGetter(qualifier, name, targs)
case Block(stats, expr) => c.Expr[M](Block(stats, transcribeTree(expr).tree)) // see issue #62
case Typed(expr, tpt) => transcribeTree(expr)
case Function(vparams, body) => transcribeTree(body)
case Apply(fun, args) => transcribeTree(fun)
case TypeApply(fun, args) => transcribeTree(fun, args.map(_.tpe))
case Ident(fun) => reportError(s"please declare '$fun' as MockFunctionx or StubFunctionx (e.g val $fun: MockFunction1[X, R] = ... if it has 1 parameter)")
case _ => reportError(
s"ScalaMock: Unrecognised structure: ${showRaw(tree)}." +
"Please open a ticket at https://github.com/paulbutcher/ScalaMock/issues")
}
}
transcribeTree(f.tree)
}
// This performs a ridiculously simple-minded overload resolution, but it works well enough for
// our purposes, and is much easier than trying to backport the implementation that was deleted
// from the macro API (c.f. https://groups.google.com/d/msg/scala-internals/R1iZXfotqds/3xytfX39U2wJ)
//! TODO - replace with official resolveOverloaded if/when it's reinstated
def resolveOverloaded(c: Context)(method: c.universe.TermSymbol, targs: List[c.universe.Type], actuals: List[c.universe.Type]): c.universe.Symbol = {
val utils = new MacroUtils[c.type](c)
import utils._
import c.universe._
def sameTypes(types1: List[Type], types2: List[Type]) = {
// see issue #34
var these = types1.map(_.dealias)
var those = types2.map(_.dealias)
while (!these.isEmpty && !those.isEmpty && these.head =:= those.head) {
these = these.tail
those = those.tail
}
these.isEmpty && those.isEmpty
}
method.alternatives find { m =>
val tpe = m.typeSignature
val pts = {
if (targs.nonEmpty && tpe.typeParams.length == targs.length)
paramTypes(appliedType(tpe, targs))
else
paramTypes(tpe)
}
sameTypes(pts, actuals)
} getOrElse {
reportError(s"Unable to resolve overloaded method ${method.name}")
}
}
}
