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

Example 86 with Expression

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

the class StatementGenerator method visit.

@Override
public boolean visit(ExpressionStatement node) {
    Expression expression = node.getExpression();
    TypeMirror type = expression.getTypeMirror();
    if (!type.getKind().isPrimitive() && !type.getKind().equals(TypeKind.VOID) && options.useARC() && (expression instanceof MethodInvocation || expression instanceof SuperMethodInvocation || expression instanceof FunctionInvocation)) {
        // Avoid clang warning that the return value is unused.
        buffer.append("(void) ");
    }
    expression.accept(this);
    buffer.append(";\n");
    return false;
}

Example 87 with Expression

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

the class StatementGenerator method visit.

@Override
public boolean visit(FunctionInvocation node) {
    // If the function is actually a macro, then it's arguments may need to be wrapped in
    // parentheses.
    boolean isMacro = node.getFunctionElement().isMacro();
    buffer.append(node.getName());
    buffer.append('(');
    for (Iterator<Expression> iter = node.getArguments().iterator(); iter.hasNext(); ) {
        Expression arg = iter.next();
        if (isMacro) {
            acceptMacroArgument(arg);
        } else {
            arg.accept(this);
        }
        if (iter.hasNext()) {
            buffer.append(", ");
        }
    }
    buffer.append(')');
    return false;
}

Example 88 with Expression

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

the class SuperMethodInvocationRewriter method endVisit.

@Override
public void endVisit(SuperMethodInvocation node) {
    Expression receiver = node.getReceiver();
    ExecutableElement method = node.getExecutableElement();
    TypeMirror exprType = node.getTypeMirror();
    assert !ElementUtil.isDefault(method) : "Default methods are handled in Functionizer.java";
    if (receiver == null) {
        return;
    }
    VariableElement var = TreeUtil.getVariableElement(receiver);
    assert var != null : "Expected receiver to be a variable";
    TypeMirror receiverType = var.asType();
    TypeElement receiverElem = TypeUtil.asTypeElement(receiverType);
    SuperMethodElementPair superMethod = new SuperMethodElementPair(receiverElem, method);
    superMethods.add(superMethod);
    FunctionElement element = new FunctionElement(getSuperFunctionName(superMethod), exprType, receiverElem).addParameters(receiverType, TypeUtil.ID_TYPE).addParameters(ElementUtil.asTypes(method.getParameters()));
    FunctionInvocation invocation = new FunctionInvocation(element, exprType);
    List<Expression> args = invocation.getArguments();
    args.add(TreeUtil.remove(receiver));
    String selectorExpr = UnicodeUtils.format("@selector(%s)", nameTable.getMethodSelector(method));
    args.add(new NativeExpression(selectorExpr, TypeUtil.ID_TYPE));
    TreeUtil.copyList(node.getArguments(), args);
    node.replaceWith(invocation);
}

Example 89 with Expression

use of com.google.devtools.j2objc.ast.Expression 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 90 with Expression

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

the class UnsequencedExpressionRewriter method extractVariableDeclarationFragments.

private void extractVariableDeclarationFragments(List<VariableDeclarationFragment> fragments, List<Statement> stmtList) {
    for (int i = 0; i < fragments.size(); i++) {
        VariableDeclarationFragment frag = fragments.get(i);
        Expression init = frag.getInitializer();
        if (init == null) {
            continue;
        }
        newExpression(init);
        init.accept(this);
        List<VariableAccess> toExtract = getUnsequencedAccesses();
        if (!toExtract.isEmpty()) {
            if (i > 0) {
                // Extract all fragments before the current one to preserve ordering.
                VariableDeclarationStatement newDecl = new VariableDeclarationStatement(fragments.get(0).copy());
                for (int j = 1; j < i; j++) {
                    newDecl.addFragment(fragments.get(j).copy());
                }
                stmtList.add(newDecl);
                fragments.subList(0, i).clear();
            }
            extractOrderedAccesses(stmtList, currentTopNode, toExtract);
            i = 0;
        }
    }
}