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// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
// part of "core_patch.dart";
// NOTE: When making changes to this class, please also update
// `VmTarget.instantiateInvocation` and `VmTarget._invocationType` in
// `pkg/kernel/lib/target/vm.dart`.
class _InvocationMirror implements Invocation {
// Constants describing the invocation kind.
// _FIELD cannot be generated by regular invocation mirrors.
static const int _METHOD = 0;
static const int _GETTER = 1;
static const int _SETTER = 2;
static const int _FIELD = 3;
static const int _LOCAL_VAR = 4;
static const int _KIND_SHIFT = 0;
static const int _KIND_BITS = 3;
static const int _KIND_MASK = (1 << _KIND_BITS) - 1;
// These values, except _DYNAMIC and _SUPER, are only used when throwing
// NoSuchMethodError for compile-time resolution failures.
static const int _DYNAMIC = 0;
static const int _SUPER = 1;
static const int _STATIC = 2;
static const int _CONSTRUCTOR = 3;
static const int _TOP_LEVEL = 4;
static const int _LEVEL_SHIFT = _KIND_BITS;
static const int _LEVEL_BITS = 3;
static const int _LEVEL_MASK = (1 << _LEVEL_BITS) - 1;
// ArgumentsDescriptor layout. Keep in sync with enum in dart_entry.h.
static const int _TYPE_ARGS_LEN = 0;
static const int _COUNT = 1;
static const int _POSITIONAL_COUNT = 2;
static const int _FIRST_NAMED_ENTRY = 3;
// Internal representation of the invocation mirror.
String _functionName;
List _argumentsDescriptor;
List _arguments;
bool _isSuperInvocation;
int _delayedTypeArgumentsLen;
// External representation of the invocation mirror; populated on demand.
Symbol _memberName;
int _type;
List<Type> _typeArguments;
List _positionalArguments;
Map<Symbol, dynamic> _namedArguments;
_InvocationMirror._withType(this._memberName, this._type, this._typeArguments,
this._positionalArguments, this._namedArguments) {
_typeArguments ??= const <Type>[];
_positionalArguments ??= const [];
_namedArguments ??= const {};
}
void _setMemberNameAndType() {
_type ??= 0;
if (_functionName.startsWith("get:")) {
_type |= _GETTER;
_memberName = new internal.Symbol.unvalidated(_functionName.substring(4));
} else if (_functionName.startsWith("set:")) {
_type |= _SETTER;
_memberName =
new internal.Symbol.unvalidated(_functionName.substring(4) + "=");
} else {
_type |=
_isSuperInvocation ? (_SUPER << _LEVEL_SHIFT) | _METHOD : _METHOD;
_memberName = new internal.Symbol.unvalidated(_functionName);
}
}
Symbol get memberName {
if (_memberName == null) {
_setMemberNameAndType();
}
return _memberName;
}
int get _typeArgsLen {
int typeArgsLen = _argumentsDescriptor[_TYPE_ARGS_LEN];
return typeArgsLen == 0 ? _delayedTypeArgumentsLen : typeArgsLen;
}
List<Type> get typeArguments {
if (_typeArguments == null) {
if (_typeArgsLen == 0) {
return _typeArguments = const <Type>[];
}
// A TypeArguments object does not have a corresponding Dart class and
// cannot be accessed as an array in Dart. Therefore, we need a native
// call to unpack the individual types into a list.
_typeArguments = _unpackTypeArguments(_arguments[0], _typeArgsLen);
}
return _typeArguments;
}
// Unpack the given TypeArguments object into a new list of individual types.
static List<Type> _unpackTypeArguments(typeArguments, int numTypeArguments)
native "InvocationMirror_unpackTypeArguments";
List get positionalArguments {
if (_positionalArguments == null) {
// The argument descriptor counts the receiver, but not the type arguments
// as positional arguments.
int numPositionalArguments = _argumentsDescriptor[_POSITIONAL_COUNT] - 1;
if (numPositionalArguments == 0) {
return _positionalArguments = const [];
}
// Exclude receiver and type args in the returned list.
int receiverIndex = _typeArgsLen > 0 ? 1 : 0;
_positionalArguments = new _ImmutableList._from(
_arguments, receiverIndex + 1, numPositionalArguments);
}
return _positionalArguments;
}
Map<Symbol, dynamic> get namedArguments {
if (_namedArguments == null) {
int numArguments = _argumentsDescriptor[_COUNT] - 1; // Exclude receiver.
int numPositionalArguments = _argumentsDescriptor[_POSITIONAL_COUNT] - 1;
int numNamedArguments = numArguments - numPositionalArguments;
if (numNamedArguments == 0) {
return _namedArguments = const {};
}
int receiverIndex = _typeArgsLen > 0 ? 1 : 0;
_namedArguments = new Map<Symbol, dynamic>();
for (int i = 0; i < numNamedArguments; i++) {
int namedEntryIndex = _FIRST_NAMED_ENTRY + 2 * i;
String arg_name = _argumentsDescriptor[namedEntryIndex];
var arg_value = _arguments[
receiverIndex + _argumentsDescriptor[namedEntryIndex + 1]];
_namedArguments[new internal.Symbol.unvalidated(arg_name)] = arg_value;
}
_namedArguments = new Map.unmodifiable(_namedArguments);
}
return _namedArguments;
}
bool get isMethod {
if (_type == null) {
_setMemberNameAndType();
}
return (_type & _KIND_MASK) == _METHOD;
}
bool get isAccessor {
if (_type == null) {
_setMemberNameAndType();
}
return (_type & _KIND_MASK) != _METHOD;
}
bool get isGetter {
if (_type == null) {
_setMemberNameAndType();
}
return (_type & _KIND_MASK) == _GETTER;
}
bool get isSetter {
if (_type == null) {
_setMemberNameAndType();
}
return (_type & _KIND_MASK) == _SETTER;
}
_InvocationMirror(this._functionName, this._argumentsDescriptor,
this._arguments, this._isSuperInvocation, this._type,
[this._delayedTypeArgumentsLen = 0]);
_InvocationMirror._withoutType(this._functionName, this._typeArguments,
this._positionalArguments, this._namedArguments, this._isSuperInvocation,
[this._delayedTypeArgumentsLen = 0]);
@pragma("vm:entry-point")
static _allocateInvocationMirror(String functionName,
List argumentsDescriptor, List arguments, bool isSuperInvocation,
[int type = null]) {
return new _InvocationMirror(
functionName, argumentsDescriptor, arguments, isSuperInvocation, type);
}
// This factory is used when creating an `Invocation` for a closure call which
// may have delayed type arguments. In that case, the arguments descriptor will
// indicate 0 type arguments, but the actual number of type arguments are
// passed in `delayedTypeArgumentsLen`. If any type arguments are available,
// the type arguments vector will be the first entry in `arguments`.
@pragma("vm:entry-point")
static _allocateInvocationMirrorForClosure(
String functionName,
List argumentsDescriptor,
List arguments,
int type,
int delayedTypeArgumentsLen) {
return new _InvocationMirror(functionName, argumentsDescriptor, arguments,
false, type, delayedTypeArgumentsLen);
}
}