Compute NativeBehavior for native methods and fields.

pkg/compiler/lib/src/kernel/constant_visitor.dart

+// Copyright (c) 2016, 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.md file.
+
+import 'package:kernel/ast.dart' as ir;
+
+import '../constants/expressions.dart';
+import 'kernel.dart';
+
+/// Visitor that converts a [ConstantExpression] into a kernel constant
+/// expression.
+class ConstantVisitor extends ConstantExpressionVisitor<ir.Node, Kernel> {
+  const ConstantVisitor();
+
+  @override
+  ir.Node visitNamed(NamedArgumentReference exp, Kernel kernel) {
+    throw new UnsupportedError(
+        '${exp.toStructuredText()} is not a valid constant.');
+  }
+
+  @override
+  ir.Node visitPositional(PositionalArgumentReference exp, Kernel kernel) {
+    throw new UnsupportedError(
+        '${exp.toStructuredText()} is not a valid constant.');
+  }
+
+  @override
+  ir.Node visitDeferred(DeferredConstantExpression exp, Kernel kernel) {
+    throw new UnimplementedError('${exp.toStructuredText()} is not supported.');
+  }
+
+  @override
+  ir.Node visitStringFromEnvironment(
+      StringFromEnvironmentConstantExpression exp, Kernel kernel) {
+    throw new UnimplementedError('${exp.toStructuredText()} is not supported.');
+  }
+
+  @override
+  ir.Node visitIntFromEnvironment(
+      IntFromEnvironmentConstantExpression exp, Kernel kernel) {
+    throw new UnimplementedError('${exp.toStructuredText()} is not supported.');
+  }
+
+  @override
+  ir.Node visitBoolFromEnvironment(
+      BoolFromEnvironmentConstantExpression exp, Kernel kernel) {
+    throw new UnimplementedError('${exp.toStructuredText()} is not supported.');
+  }
+
+  @override
+  ir.Node visitConditional(ConditionalConstantExpression exp, Kernel kernel) {
+    throw new UnimplementedError('${exp.toStructuredText()} is not supported.');
+  }
+
+  @override
+  ir.Node visitStringLength(StringLengthConstantExpression exp, Kernel kernel) {
+    throw new UnimplementedError('${exp.toStructuredText()} is not supported.');
+  }
+
+  @override
+  ir.Node visitUnary(UnaryConstantExpression exp, Kernel kernel) {
+    throw new UnimplementedError('${exp.toStructuredText()} is not supported.');
+  }
+
+  @override
+  ir.Node visitIdentical(IdenticalConstantExpression exp, Kernel kernel) {
+    throw new UnimplementedError('${exp.toStructuredText()} is not supported.');
+  }
+
+  @override
+  ir.Node visitBinary(BinaryConstantExpression exp, Kernel kernel) {
+    throw new UnimplementedError('${exp.toStructuredText()} is not supported.');
+  }
+
+  @override
+  ir.Node visitFunction(FunctionConstantExpression exp, Kernel kernel) {
+    throw new UnimplementedError('${exp.toStructuredText()} is not supported.');
+  }
+
+  @override
+  ir.Node visitVariable(VariableConstantExpression exp, Kernel kernel) {
+    return new ir.StaticGet(kernel.fieldToIr(exp.element));
+  }
+
+  @override
+  ir.Node visitType(TypeConstantExpression exp, Kernel kernel) {
+    throw new UnimplementedError('${exp.toStructuredText()} is not supported.');
+  }
+
+  @override
+  ir.Node visitSymbol(SymbolConstantExpression exp, Kernel kernel) {
+    throw new UnimplementedError('${exp.toStructuredText()} is not supported.');
+  }
+
+  @override
+  ir.Node visitConcatenate(ConcatenateConstantExpression exp, Kernel kernel) {
+    throw new UnimplementedError('${exp.toStructuredText()} is not supported.');
+  }
+
+  @override
+  ir.Node visitConstructed(ConstructedConstantExpression exp, Kernel kernel) {
+    List<ir.Expression> positional = <ir.Expression>[];
+    List<ir.NamedExpression> named = <ir.NamedExpression>[];
+    int positionalCount = exp.callStructure.positionalArgumentCount;
+    for (int index = 0; index < positionalCount; index++) {
+      ir.Expression argument = visit(exp.arguments[index], kernel);
+      if (index < exp.callStructure.positionalArgumentCount) {
+        positional.add(argument);
+      } else {
+        named.add(new ir.NamedExpression(
+            exp.callStructure.namedArguments[index - positionalCount],
+            argument));
+      }
+    }
+    ir.Arguments arguments = new ir.Arguments(positional, named: named);
+    return new ir.ConstructorInvocation(
+        kernel.functionToIr(exp.target), arguments,
+        isConst: true);
+  }
+
+  @override
+  ir.Node visitMap(MapConstantExpression exp, Kernel kernel) {
+    throw new UnimplementedError('${exp.toStructuredText()} is not supported.');
+  }
+
+  @override
+  ir.Node visitList(ListConstantExpression exp, Kernel kernel) {
+    throw new UnimplementedError('${exp.toStructuredText()} is not supported.');
+  }
+
+  @override
+  ir.Node visitNull(NullConstantExpression exp, Kernel kernel) {
+    return new ir.NullLiteral();
+  }
+
+  @override
+  ir.Node visitString(StringConstantExpression exp, Kernel kernel) {
+    return new ir.StringLiteral(exp.primitiveValue);
+  }
+
+  @override
+  ir.Node visitDouble(DoubleConstantExpression exp, Kernel kernel) {
+    return new ir.DoubleLiteral(exp.primitiveValue);
+  }
+
+  @override
+  ir.Node visitInt(IntConstantExpression exp, Kernel kernel) {
+    return new ir.IntLiteral(exp.primitiveValue);
+  }
+
+  @override
+  ir.Node visitBool(BoolConstantExpression exp, Kernel kernel) {
+    return new ir.BoolLiteral(exp.primitiveValue);
+  }
+}