Examples with Expression com.google.devtools.j2objc.ast.Expression used on opensource projects

Example 91 with Expression

use of com.google.devtools.j2objc.ast.Expression in project j2objc by google.

the class UnsequencedExpressionRewriter method visit.

@Override
public boolean visit(Assignment node) {
    Expression lhs = node.getLeftHandSide();
    VariableElement lhsVar = TreeUtil.getVariableElement(lhs);
    // its access after visiting the rhs. Otherwise, visit both sides.
    if (lhsVar == null) {
        lhs.accept(this);
    }
    node.getRightHandSide().accept(this);
    addVariableAccess(lhsVar, node, true);
    return false;
}

Example 92 with Expression

use of com.google.devtools.j2objc.ast.Expression in project j2objc by google.

the class UnsequencedExpressionRewriter method visit.

@Override
public boolean visit(AssertStatement node) {
    Expression expr = node.getExpression();
    visitAndExtract(expr, node);
    Expression msg = node.getMessage();
    if (msg != null) {
        newExpression(msg);
        msg.accept(this);
        List<VariableAccess> toExtract = getUnsequencedAccesses();
        if (!toExtract.isEmpty()) {
            // If the message expression needs any extraction, then we first extract
            // the entire boolean expression to preserve ordering between the two.
            VariableElement exprVar = GeneratedVariableElement.newLocalVar("unseq$" + count++, expr.getTypeMirror(), currentMethod);
            TreeUtil.insertBefore(node, new VariableDeclarationStatement(exprVar, node.getExpression().copy()));
            node.setExpression(new SimpleName(exprVar));
            extractOrderedAccesses(TreeUtil.asStatementList(node).subList(0, 0), currentTopNode, toExtract);
        }
    }
    return false;
}

Example 93 with Expression

use of com.google.devtools.j2objc.ast.Expression in project j2objc by google.

the class UnsequencedExpressionRewriter method visit.

@Override
public boolean visit(ConstructorInvocation node) {
    newExpression(node);
    for (Expression arg : node.getArguments()) {
        arg.accept(this);
    }
    extractUnsequenced(node);
    return false;
}

Example 94 with Expression

use of com.google.devtools.j2objc.ast.Expression in project j2objc by google.

the class OuterReferenceResolver method addCaptureArgs.

private void addCaptureArgs(TypeElement type, List<Expression> args) {
    for (VariableElement var : captureInfo.getCapturedVars(type)) {
        Expression path = getPathForLocalVar(var);
        if (path == null) {
            path = new SimpleName(var);
        }
        args.add(path);
    }
}

Example 95 with Expression

use of com.google.devtools.j2objc.ast.Expression in project j2objc by google.

the class Rewriter method visit.

@Override
public boolean visit(TryStatement node) {
    // This visit rewrites try-with-resources constructs into regular try statements according to
    // JLS 14.20.3. The rewriting is done in a visit instead of endVisit because the mutations may
    // result in more try-with-resources constructs that need to be rewritten recursively.
    List<TreeNode> resources = node.getResources();
    if (resources.isEmpty()) {
        return true;
    }
    if (!node.getCatchClauses().isEmpty() || node.getFinally() != null) {
        // Extended try-with-resources. (JLS 14.20.3.2)
        // The new innerTry statement will be a "Basic try-with-resources" and will be rewritten by
        // the code below when it is visited.
        TryStatement innerTry = new TryStatement().setBody(TreeUtil.remove(node.getBody()));
        ;
        TreeUtil.moveList(resources, innerTry.getResources());
        node.setBody(new Block().addStatement(innerTry));
        return true;
    }
    // Basic try-with-resources. (JLS 14.20.3.1)
    DeclaredType throwableType = (DeclaredType) typeUtil.getJavaThrowable().asType();
    VariableElement primaryException = GeneratedVariableElement.newLocalVar("__primaryException" + resources.size(), throwableType, null);
    TreeNode resource = resources.remove(0);
    VariableElement resourceVar = null;
    VariableDeclarationFragment resourceFrag = null;
    if (resource.getKind() == Kind.VARIABLE_DECLARATION_EXPRESSION) {
        List<VariableDeclarationFragment> resourceFrags = ((VariableDeclarationExpression) resource).getFragments();
        assert resourceFrags.size() == 1;
        resourceFrag = resourceFrags.get(0);
        resourceVar = resourceFrag.getVariableElement();
    } else {
        resourceVar = TreeUtil.getVariableElement((Expression) resource);
    }
    assert resourceVar != null;
    DeclaredType closeableType = typeUtil.findSupertype(resourceVar.asType(), "java.lang.AutoCloseable");
    ExecutablePair closeMethod = typeUtil.findMethod(closeableType, "close");
    ExecutablePair addSuppressedMethod = typeUtil.findMethod(throwableType, "addSuppressed", "java.lang.Throwable");
    Block block = new Block();
    if (resourceFrag != null) {
        block.addStatement(new VariableDeclarationStatement(resourceVar, TreeUtil.remove(resourceFrag.getInitializer())));
    }
    block.addStatement(new VariableDeclarationStatement(primaryException, new NullLiteral(typeUtil.getNull())));
    // If the current try node is the only statement in its parent block then replace the parent
    // block instead of the try node to avoid extra nesting of braces.
    TreeNode parent = node.getParent();
    if (parent instanceof Block && ((Block) parent).getStatements().size() == 1) {
        parent.replaceWith(block);
    } else {
        node.replaceWith(block);
    }
    block.addStatement(TreeUtil.remove(node));
    VariableElement caughtException = GeneratedVariableElement.newLocalVar("e", throwableType, null);
    Block catchBlock = new Block().addStatement(new ExpressionStatement(new Assignment(new SimpleName(primaryException), new SimpleName(caughtException)))).addStatement(new ThrowStatement(new SimpleName(caughtException)));
    node.addCatchClause(new CatchClause().setException(new SingleVariableDeclaration(caughtException)).setBody(catchBlock));
    Statement closeResource = new ExpressionStatement(new MethodInvocation(closeMethod, typeUtil.getVoid(), new SimpleName(resourceVar)));
    VariableElement suppressedException = GeneratedVariableElement.newLocalVar("e", throwableType, null);
    node.setFinally(new Block().addStatement(new IfStatement().setExpression(new InfixExpression(typeUtil.getBoolean(), InfixExpression.Operator.NOT_EQUALS, new SimpleName(resourceVar), new NullLiteral(typeUtil.getNull()))).setThenStatement(new Block().addStatement(new IfStatement().setExpression(new InfixExpression(typeUtil.getBoolean(), InfixExpression.Operator.NOT_EQUALS, new SimpleName(primaryException), new NullLiteral(typeUtil.getNull()))).setThenStatement(new Block().addStatement(new TryStatement().setBody(new Block().addStatement(closeResource)).addCatchClause(new CatchClause().setException(new SingleVariableDeclaration(suppressedException)).setBody(new Block().addStatement(new ExpressionStatement(new MethodInvocation(addSuppressedMethod, typeUtil.getVoid(), new SimpleName(primaryException)).addArgument(new SimpleName(suppressedException)))))))).setElseStatement(new Block().addStatement(closeResource.copy()))))));
    // Visit the new block instead of the current node because some of content of the node (eg. the
    // resource initializer) has been moved outside of the try node.
    block.accept(this);
    return false;
}