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

Example 26 with Block

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

the class UnsequencedExpressionRewriter method extractConditionalExpression.

private void extractConditionalExpression(List<Statement> stmtList, ConditionalExpression conditional, List<VariableAccess> toExtract) {
    Expression condition = conditional.getExpression();
    Expression thenExpr = conditional.getThenExpression();
    Expression elseExpr = conditional.getElseExpression();
    List<VariableAccess> conditionAccesses = Lists.newArrayList();
    List<VariableAccess> thenAccesses = Lists.newArrayList();
    List<VariableAccess> elseAccesses = Lists.newArrayList();
    boolean needsExtraction = false;
    for (VariableAccess access : toExtract) {
        TreeNode node = access.expression;
        while (node.getParent() != conditional) {
            node = node.getParent();
        }
        if (node == condition) {
            conditionAccesses.add(access);
        } else if (node == thenExpr) {
            thenAccesses.add(access);
        } else if (node == elseExpr) {
            elseAccesses.add(access);
        } else {
            throw new AssertionError();
        }
        if (node != condition) {
            // We need to extract an if-statement if there is an access that
            // executes conditionally.
            needsExtraction = true;
        }
    }
    extractOrderedAccesses(stmtList, condition, conditionAccesses);
    // The recursive call might replace the condition child.
    condition = conditional.getExpression();
    if (needsExtraction) {
        VariableElement resultVar = GeneratedVariableElement.newLocalVar("unseq$" + count++, conditional.getTypeMirror(), currentMethod);
        conditional.replaceWith(new SimpleName(resultVar));
        stmtList.add(new VariableDeclarationStatement(resultVar, null));
        IfStatement newIf = new IfStatement();
        newIf.setExpression(condition.copy());
        stmtList.add(newIf);
        Block thenBlock = new Block();
        newIf.setThenStatement(thenBlock);
        List<Statement> thenStmts = thenBlock.getStatements();
        extractOrderedAccesses(thenStmts, thenExpr, thenAccesses);
        // The recursive call might replace the then expression child.
        thenExpr = conditional.getThenExpression();
        thenStmts.add(new ExpressionStatement(new Assignment(new SimpleName(resultVar), thenExpr.copy())));
        Block elseBlock = new Block();
        newIf.setElseStatement(elseBlock);
        List<Statement> elseStmts = elseBlock.getStatements();
        extractOrderedAccesses(elseStmts, elseExpr, elseAccesses);
        // The recursive call might replace the else expression child.
        elseExpr = conditional.getElseExpression();
        elseStmts.add(new ExpressionStatement(new Assignment(new SimpleName(resultVar), elseExpr.copy())));
    } else {
        extractOrderedAccesses(stmtList, thenExpr, thenAccesses);
        extractOrderedAccesses(stmtList, elseExpr, elseAccesses);
    }
}

Example 27 with Block

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

the class InitializationNormalizer method isDesignatedConstructor.

/**
   * Returns true if this is a constructor that doesn't call "this(...)".  This constructors are
   * skipped so initializers aren't run more than once per instance creation.
   */
public static boolean isDesignatedConstructor(MethodDeclaration node) {
    if (!node.isConstructor()) {
        return false;
    }
    Block body = node.getBody();
    if (body == null) {
        return false;
    }
    List<Statement> stmts = body.getStatements();
    return (stmts.isEmpty() || !(stmts.get(0) instanceof ConstructorInvocation));
}

Example 28 with Block

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

the class LabelRewriter method endVisit.

@Override
public void endVisit(LabeledStatement node) {
    Statement loopBody = getLoopBody(node.getBody());
    final String labelIdentifier = node.getLabel().getIdentifier();
    final boolean[] hasContinue = new boolean[1];
    final boolean[] hasBreak = new boolean[1];
    node.accept(new TreeVisitor() {

        @Override
        public void endVisit(ContinueStatement node) {
            if (node.getLabel() != null && node.getLabel().getIdentifier().equals(labelIdentifier)) {
                hasContinue[0] = true;
                node.setLabel(new SimpleName("continue_" + labelIdentifier));
            }
        }

        @Override
        public void endVisit(BreakStatement node) {
            if (node.getLabel() != null && node.getLabel().getIdentifier().equals(labelIdentifier)) {
                hasBreak[0] = true;
                node.setLabel(new SimpleName("break_" + labelIdentifier));
            }
        }
    });
    if (hasContinue[0]) {
        assert loopBody != null : "Continue statements must be inside a loop.";
        LabeledStatement newLabelStmt = new LabeledStatement("continue_" + labelIdentifier);
        newLabelStmt.setBody(new EmptyStatement());
        // Put the loop body into an inner block so the continue label is outside
        // the scope of any variable initializations.
        Block newBlock = new Block();
        loopBody.replaceWith(newBlock);
        newBlock.addStatement(loopBody);
        newBlock.addStatement(newLabelStmt);
    }
    if (hasBreak[0]) {
        LabeledStatement newLabelStmt = new LabeledStatement("break_" + labelIdentifier);
        newLabelStmt.setBody(new EmptyStatement());
        TreeUtil.insertAfter(node, newLabelStmt);
    }
    if (hasContinue[0] || hasBreak[0]) {
        // Replace this node with its statement, thus deleting the label.
        node.replaceWith(TreeUtil.remove(node.getBody()));
    }
}

Example 29 with Block

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

the class Rewriter method endVisit.

@Override
public void endVisit(VariableDeclarationStatement node) {
    if (options.isJDT()) {
        ListMultimap<Integer, VariableDeclarationFragment> newDeclarations = rewriteExtraDimensions(node.getFragments());
        if (newDeclarations != null) {
            List<Statement> statements = ((Block) node.getParent()).getStatements();
            int location = 0;
            while (location < statements.size() && !node.equals(statements.get(location))) {
                location++;
            }
            for (Integer dimensions : newDeclarations.keySet()) {
                List<VariableDeclarationFragment> fragments = newDeclarations.get(dimensions);
                VariableDeclarationStatement newDecl = new VariableDeclarationStatement(fragments.get(0));
                newDecl.getFragments().addAll(fragments.subList(1, fragments.size()));
                statements.add(++location, newDecl);
            }
        }
    }
}

Example 30 with Block

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

the class PackageInfoRewriter method createPrefixMethod.

private MethodDeclaration createPrefixMethod(String prefix, TypeElement type) {
    ExecutableElement element = GeneratedExecutableElement.newMethodWithSelector("__prefix", typeUtil.getJavaString().asType(), type).addModifiers(Modifier.STATIC);
    MethodDeclaration method = new MethodDeclaration(element);
    method.setHasDeclaration(false);
    Block body = new Block();
    method.setBody(body);
    body.addStatement(new ReturnStatement(new StringLiteral(prefix, typeUtil)));
    return method;
}