Search in sources :

Example 6 with ConditionalExpression

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

the class CastResolver method endVisit.

@Override
public void endVisit(ConditionalExpression node) {
    Expression thenExpr = node.getThenExpression();
    Expression elseExpr = node.getElseExpression();
    if (incompatibleTypes(thenExpr, elseExpr)) {
        // Add (id) cast to else expression.
        node.setElseExpression(new CastExpression(TypeUtil.ID_TYPE, TreeUtil.remove(elseExpr)));
    }
}
Also used : CastExpression(com.google.devtools.j2objc.ast.CastExpression) Expression(com.google.devtools.j2objc.ast.Expression) InfixExpression(com.google.devtools.j2objc.ast.InfixExpression) ParenthesizedExpression(com.google.devtools.j2objc.ast.ParenthesizedExpression) ConditionalExpression(com.google.devtools.j2objc.ast.ConditionalExpression) CastExpression(com.google.devtools.j2objc.ast.CastExpression)

Example 7 with ConditionalExpression

use of com.google.devtools.j2objc.ast.ConditionalExpression 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);
    }
}
Also used : ExpressionStatement(com.google.devtools.j2objc.ast.ExpressionStatement) AssertStatement(com.google.devtools.j2objc.ast.AssertStatement) ForStatement(com.google.devtools.j2objc.ast.ForStatement) SynchronizedStatement(com.google.devtools.j2objc.ast.SynchronizedStatement) DoStatement(com.google.devtools.j2objc.ast.DoStatement) EnhancedForStatement(com.google.devtools.j2objc.ast.EnhancedForStatement) VariableDeclarationStatement(com.google.devtools.j2objc.ast.VariableDeclarationStatement) WhileStatement(com.google.devtools.j2objc.ast.WhileStatement) BreakStatement(com.google.devtools.j2objc.ast.BreakStatement) IfStatement(com.google.devtools.j2objc.ast.IfStatement) Statement(com.google.devtools.j2objc.ast.Statement) ReturnStatement(com.google.devtools.j2objc.ast.ReturnStatement) ThrowStatement(com.google.devtools.j2objc.ast.ThrowStatement) SwitchStatement(com.google.devtools.j2objc.ast.SwitchStatement) SimpleName(com.google.devtools.j2objc.ast.SimpleName) VariableElement(javax.lang.model.element.VariableElement) GeneratedVariableElement(com.google.devtools.j2objc.types.GeneratedVariableElement) Assignment(com.google.devtools.j2objc.ast.Assignment) IfStatement(com.google.devtools.j2objc.ast.IfStatement) PostfixExpression(com.google.devtools.j2objc.ast.PostfixExpression) Expression(com.google.devtools.j2objc.ast.Expression) PrefixExpression(com.google.devtools.j2objc.ast.PrefixExpression) VariableDeclarationExpression(com.google.devtools.j2objc.ast.VariableDeclarationExpression) InfixExpression(com.google.devtools.j2objc.ast.InfixExpression) ParenthesizedExpression(com.google.devtools.j2objc.ast.ParenthesizedExpression) CommaExpression(com.google.devtools.j2objc.ast.CommaExpression) ConditionalExpression(com.google.devtools.j2objc.ast.ConditionalExpression) TreeNode(com.google.devtools.j2objc.ast.TreeNode) ExpressionStatement(com.google.devtools.j2objc.ast.ExpressionStatement) VariableDeclarationStatement(com.google.devtools.j2objc.ast.VariableDeclarationStatement) Block(com.google.devtools.j2objc.ast.Block)

Aggregations

ConditionalExpression (com.google.devtools.j2objc.ast.ConditionalExpression)7 InfixExpression (com.google.devtools.j2objc.ast.InfixExpression)6 Expression (com.google.devtools.j2objc.ast.Expression)4 ParenthesizedExpression (com.google.devtools.j2objc.ast.ParenthesizedExpression)4 PrefixExpression (com.google.devtools.j2objc.ast.PrefixExpression)3 CastExpression (com.google.devtools.j2objc.ast.CastExpression)2 PostfixExpression (com.google.devtools.j2objc.ast.PostfixExpression)2 SimpleName (com.google.devtools.j2objc.ast.SimpleName)2 TreeNode (com.google.devtools.j2objc.ast.TreeNode)2 VariableDeclarationStatement (com.google.devtools.j2objc.ast.VariableDeclarationStatement)2 GeneratedVariableElement (com.google.devtools.j2objc.types.GeneratedVariableElement)2 VariableElement (javax.lang.model.element.VariableElement)2 AssertStatement (com.google.devtools.j2objc.ast.AssertStatement)1 Assignment (com.google.devtools.j2objc.ast.Assignment)1 Block (com.google.devtools.j2objc.ast.Block)1 BreakStatement (com.google.devtools.j2objc.ast.BreakStatement)1 CommaExpression (com.google.devtools.j2objc.ast.CommaExpression)1 DoStatement (com.google.devtools.j2objc.ast.DoStatement)1 EnhancedForStatement (com.google.devtools.j2objc.ast.EnhancedForStatement)1 ExpressionStatement (com.google.devtools.j2objc.ast.ExpressionStatement)1