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* Using HLists instead of tuples for inference. * Upgrading method signatures * Trying to force cast * Duck typing generics to collide HList types if enclosing type is found. * Removing useless printlns * Adding more documentation and dealing with warnings. * Adding more documentation. * Adding shapeless implementation. * Removing unused imports. * Removing println statements, tweaking echo and info usage and fixing SingleGenerics * A bit more work and tests * Cheating * Fixing logging for batch staments. * Upgrading batch query mechanism. * Adding macro paradise plugin dependency * Adding more docs. * Fixing recurvise call * Renaming batch method [version skip]
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phantom-dsl/src/main/scala/com/outworkers/phantom/macros/==:==.scala
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| @@ -0,0 +1,78 @@ | ||
| /* | ||
| * Copyright 2013 - 2017 Outworkers Ltd. | ||
| * | ||
| * 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 com.outworkers.phantom.macros | ||
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| import shapeless.{HList, HNil} | ||
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| import scala.annotation.tailrec | ||
| import scala.reflect.macros.whitebox | ||
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| /** | ||
| * A special implicitly materialized typeclass that compares HLists for equality. | ||
| * This also prints more useful information to the end user if the HLists don't match. | ||
| * However, it is required because the standard [[=:=]] type class in Scala | ||
| * is not able to see through an HList generated as an abstract type member of another | ||
| * implicitly materialized type class. | ||
| * @tparam LL The left [[shapeless.HList]] type. | ||
| * @tparam RR The right [[shapeless.HList]] type. | ||
| */ | ||
| trait ==:==[LL <: HList, RR <: HList] | ||
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| object ==:== { | ||
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| def apply[LL <: HList, RR <: HList](implicit ev: LL ==:== RR): ==:==[LL, RR] = ev | ||
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| implicit def materialize[ | ||
| LL <: HList, | ||
| RR <: HList | ||
| ]: ==:==[LL, RR] = macro EqsMacro.materialize[LL, RR] | ||
| } | ||
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| @macrocompat.bundle | ||
| class EqsMacro(val c: whitebox.Context) extends WhiteboxToolbelt with HListHelpers { | ||
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| import c.universe._ | ||
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| protected[this] val macroPkg = q"_root_.com.outworkers.phantom.macros" | ||
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| def mkEqs(left: Type, right: Type): Tree = { | ||
| if (left =:= right) { | ||
| val tree = q"""new $macroPkg.==:==[$left, $right] {}""" | ||
| if (showTrees) { | ||
| echo(showCode(tree)) | ||
| } | ||
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| tree | ||
| } else { | ||
| val debugString = s"Types ${showHList(left)} did not equal ${showHList(right)}" | ||
| error(debugString) | ||
| abort( debugString) | ||
| } | ||
| } | ||
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| def materialize[LL <: HList : c.WeakTypeTag, RR <: HList : c.WeakTypeTag]: Tree = { | ||
| val left = weakTypeOf[LL] | ||
| val right = weakTypeOf[RR] | ||
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| memoize[(Type, Type), Tree]( | ||
| WhiteboxToolbelt.specialEqsCache | ||
| )(Tuple2(left, right), { case (t, s) => mkEqs(t, s)}) | ||
| } | ||
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| } |
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