* Copyright (C) 2017 Apple Inc. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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.
*/
"use strict";
class Substitution extends Rewriter {
constructor(parameters, argumentList)
{
super();
if (parameters.length != argumentList.length)
throw new Error("Parameters and arguments are mismatched");
this._map = new Map();
for (let i = 0; i < parameters.length; ++i)
this._map.set(parameters[i], argumentList[i]);
}
get map() { return this._map; }
visitTypeRef(node)
{
let replacement = this._map.get(node.type);
if (replacement) {
if (node.typeArguments.length)
throw new Error("Unexpected type arguments on type variable");
let result = replacement.visit(new AutoWrapper());
return result;
}
let result = super.visitTypeRef(node);
return result;
}
visitVariableRef(node)
{
let replacement = this._map.get(node.variable);
if (replacement)
return replacement.visit(new AutoWrapper());
return super.visitVariableRef(node);
}
}
