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org.scalajs.ir.Traversers.scala Maven / Gradle / Ivy
/*
* Scala.js (https://www.scala-js.org/)
*
* Copyright EPFL.
*
* Licensed under Apache License 2.0
* (https://www.apache.org/licenses/LICENSE-2.0).
*
* See the NOTICE file distributed with this work for
* additional information regarding copyright ownership.
*/
package org.scalajs.ir
import Trees._
object Traversers {
class Traverser {
def traverseTreeOrJSSpread(tree: TreeOrJSSpread): Unit = tree match {
case JSSpread(items) => traverse(items)
case tree: Tree => traverse(tree)
}
def traverse(tree: Tree): Unit = tree match {
// Definitions
case VarDef(_, _, _, _, rhs) =>
traverse(rhs)
// Control flow constructs
case Block(stats) =>
stats foreach traverse
case Labeled(label, tpe, body) =>
traverse(body)
case Assign(lhs, rhs) =>
traverse(lhs)
traverse(rhs)
case Return(expr, label) =>
traverse(expr)
case If(cond, thenp, elsep) =>
traverse(cond)
traverse(thenp)
traverse(elsep)
case While(cond, body) =>
traverse(cond)
traverse(body)
case ForIn(obj, _, _, body) =>
traverse(obj)
traverse(body)
case TryCatch(block, _, _, handler) =>
traverse(block)
traverse(handler)
case TryFinally(block, finalizer) =>
traverse(block)
traverse(finalizer)
case Throw(expr) =>
traverse(expr)
case Match(selector, cases, default) =>
traverse(selector)
cases foreach (c => (c._1 map traverse, traverse(c._2)))
traverse(default)
// Scala expressions
case New(_, _, args) =>
args foreach traverse
case Select(qualifier, _) =>
traverse(qualifier)
case Apply(_, receiver, _, args) =>
traverse(receiver)
args foreach traverse
case ApplyStatically(_, receiver, _, _, args) =>
traverse(receiver)
args foreach traverse
case ApplyStatic(_, _, _, args) =>
args foreach traverse
case ApplyDynamicImport(_, _, _, args) =>
args.foreach(traverse)
case UnaryOp(op, lhs) =>
traverse(lhs)
case BinaryOp(op, lhs, rhs) =>
traverse(lhs)
traverse(rhs)
case NewArray(tpe, length) =>
traverse(length)
case ArrayValue(tpe, elems) =>
elems foreach traverse
case ArrayLength(array) =>
traverse(array)
case ArraySelect(array, index) =>
traverse(array)
traverse(index)
case RecordValue(tpe, elems) =>
elems foreach traverse
case RecordSelect(record, field) =>
traverse(record)
case IsInstanceOf(expr, _) =>
traverse(expr)
case AsInstanceOf(expr, _) =>
traverse(expr)
case GetClass(expr) =>
traverse(expr)
case Clone(expr) =>
traverse(expr)
case IdentityHashCode(expr) =>
traverse(expr)
case WrapAsThrowable(expr) =>
traverse(expr)
case UnwrapFromThrowable(expr) =>
traverse(expr)
// JavaScript expressions
case JSNew(ctor, args) =>
traverse(ctor)
args.foreach(traverseTreeOrJSSpread)
case JSPrivateSelect(qualifier, _) =>
traverse(qualifier)
case JSSelect(qualifier, item) =>
traverse(qualifier)
traverse(item)
case JSFunctionApply(fun, args) =>
traverse(fun)
args.foreach(traverseTreeOrJSSpread)
case JSMethodApply(receiver, method, args) =>
traverse(receiver)
traverse(method)
args.foreach(traverseTreeOrJSSpread)
case JSSuperSelect(superClass, qualifier, item) =>
traverse(superClass)
traverse(qualifier)
traverse(item)
case JSSuperMethodCall(superClass, receiver, method, args) =>
traverse(superClass)
traverse(receiver)
traverse(method)
args.foreach(traverseTreeOrJSSpread)
case JSSuperConstructorCall(args) =>
args.foreach(traverseTreeOrJSSpread)
case JSImportCall(arg) =>
traverse(arg)
case JSDelete(qualifier, item) =>
traverse(qualifier)
traverse(item)
case JSUnaryOp(op, lhs) =>
traverse(lhs)
case JSBinaryOp(op, lhs, rhs) =>
traverse(lhs)
traverse(rhs)
case JSArrayConstr(items) =>
items.foreach(traverseTreeOrJSSpread)
case JSObjectConstr(fields) =>
for ((key, value) <- fields) {
traverse(key)
traverse(value)
}
case JSTypeOfGlobalRef(globalRef) =>
traverse(globalRef)
// Atomic expressions
case Closure(arrow, captureParams, params, restParam, body, captureValues) =>
traverse(body)
captureValues.foreach(traverse)
case CreateJSClass(_, captureValues) =>
captureValues.foreach(traverse)
// Transients
case Transient(value) =>
value.traverse(this)
// Trees that need not be traversed
case _:Skip | _:Debugger | _:LoadModule | _:StoreModule |
_:SelectStatic | _:SelectJSNativeMember | _:LoadJSConstructor |
_:LoadJSModule | _:JSNewTarget | _:JSImportMeta | _:JSLinkingInfo |
_:Literal | _:VarRef | _:This | _:JSGlobalRef =>
}
def traverseClassDef(tree: ClassDef): Unit = {
tree.jsSuperClass.foreach(traverse)
tree.fields.foreach(traverseAnyFieldDef)
tree.methods.foreach(traverseMethodDef)
tree.jsConstructor.foreach(traverseJSConstructorDef)
tree.jsMethodProps.foreach(traverseJSMethodPropDef)
tree.topLevelExportDefs.foreach(traverseTopLevelExportDef)
}
def traverseAnyFieldDef(fieldDef: AnyFieldDef): Unit = ()
def traverseMethodDef(methodDef: MethodDef): Unit =
methodDef.body.foreach(traverse)
def traverseJSConstructorDef(jsConstructor: JSConstructorDef): Unit =
jsConstructor.body.allStats.foreach(traverse)
def traverseJSMethodPropDef(jsMethodPropDef: JSMethodPropDef): Unit = {
jsMethodPropDef match {
case JSMethodDef(_, name, _, _, body) =>
traverse(name)
traverse(body)
case JSPropertyDef(_, name, getterBody, setterArgAndBody) =>
traverse(name)
getterBody.foreach(traverse)
setterArgAndBody.foreach(argAndBody => traverse(argAndBody._2))
}
}
def traverseTopLevelExportDef(exportDef: TopLevelExportDef): Unit = {
exportDef match {
case _:TopLevelJSClassExportDef | _:TopLevelModuleExportDef |
_:TopLevelFieldExportDef =>
case TopLevelMethodExportDef(_, methodDef) =>
traverseJSMethodPropDef(methodDef)
}
}
}
}
