ngeoffray@google.com
04293eb214
Review URL: https://chromiumcodereview.appspot.com//10916232 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@12370 260f80e4-7a28-3924-810f-c04153c831b5
69 lines
2.3 KiB
Dart
69 lines
2.3 KiB
Dart
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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interface Operation {
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final SourceString name;
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bool isUserDefinable();
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}
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interface UnaryOperation extends Operation {
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/** Returns [:null:] if it was unable to fold the operation. */
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Constant fold(Constant constant);
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}
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interface BinaryOperation extends Operation {
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/** Returns [:null:] if it was unable to fold the operation. */
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Constant fold(Constant left, Constant right);
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}
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/**
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* A [ConstantSystem] is responsible for creating constants and folding them.
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*/
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interface ConstantSystem {
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BinaryOperation get add;
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BinaryOperation get bitAnd;
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UnaryOperation get bitNot;
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BinaryOperation get bitOr;
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BinaryOperation get bitXor;
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BinaryOperation get booleanAnd;
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BinaryOperation get booleanOr;
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BinaryOperation get divide;
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BinaryOperation get equal;
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BinaryOperation get greaterEqual;
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BinaryOperation get greater;
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BinaryOperation get identity;
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BinaryOperation get lessEqual;
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BinaryOperation get less;
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BinaryOperation get modulo;
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BinaryOperation get multiply;
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UnaryOperation get negate;
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UnaryOperation get not;
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BinaryOperation get shiftLeft;
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BinaryOperation get shiftRight;
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BinaryOperation get subtract;
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BinaryOperation get truncatingDivide;
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Constant createInt(int i);
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Constant createDouble(double d);
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// We need a diagnostic node to report errors in case the string is malformed.
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Constant createString(DartString string, Node diagnosticNode);
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Constant createBool(bool value);
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Constant createNull();
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// We need to special case the subtype check for JavaScript constant
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// system because an int is a double at runtime.
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bool isSubtype(Compiler compiler, DartType s, DartType t);
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/** Returns true if the [constant] is an integer at runtime. */
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bool isInt(Constant constant);
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/** Returns true if the [constant] is a double at runtime. */
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bool isDouble(Constant constant);
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/** Returns true if the [constant] is a string at runtime. */
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bool isString(Constant constant);
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/** Returns true if the [constant] is a boolean at runtime. */
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bool isBool(Constant constant);
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/** Returns true if the [constant] is null at runtime. */
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bool isNull(Constant constant);
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}
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