Examples with UnaryExpression org.eclipse.n4js.n4JS.UnaryExpression used on opensource projects

Example 6 with UnaryExpression

use of org.eclipse.n4js.n4JS.UnaryExpression in project n4js by eclipse.

the class GuardFactory method createGuardForEquality.

private static Guard createGuardForEquality(EObject topContainer, boolean negateTree, EqualityExpression eqe, boolean sameEqualNot) {
    Expression lhs = eqe.getLhs();
    Expression rhs = eqe.getRhs();
    UnaryOperator luo = lhs instanceof UnaryExpression ? ((UnaryExpression) lhs).getOp() : null;
    UnaryOperator ruo = rhs instanceof UnaryExpression ? ((UnaryExpression) rhs).getOp() : null;
    // typeof foo != 'undefined'
    if (luo == UnaryOperator.TYPEOF) {
        return createGuardForTypeof(topContainer, (UnaryExpression) lhs, negateTree, sameEqualNot, rhs);
    }
    if (ruo == UnaryOperator.TYPEOF) {
        return createGuardForTypeof(topContainer, (UnaryExpression) rhs, negateTree, sameEqualNot, lhs);
    }
    // name == void 0
    if (luo == UnaryOperator.VOID && SymbolFactory.canCreate(rhs)) {
        return createGuardForVoid(topContainer, (UnaryExpression) lhs, negateTree, sameEqualNot, rhs);
    }
    if (ruo == UnaryOperator.VOID && SymbolFactory.canCreate(lhs)) {
        return createGuardForVoid(topContainer, (UnaryExpression) rhs, negateTree, sameEqualNot, lhs);
    }
    // v == null|undefined|0
    if (SymbolFactory.canCreate(lhs) && SymbolFactory.canCreate(rhs)) {
        GuardType guardType = getGuardType(lhs);
        Expression symbolExpr = rhs;
        if (guardType == null) {
            guardType = getGuardType(rhs);
            symbolExpr = lhs;
        }
        if (guardType != null) {
            return createGuardForNUZ(topContainer, eqe, negateTree, sameEqualNot, guardType, symbolExpr);
        }
    }
    return null;
}

Example 7 with UnaryExpression

use of org.eclipse.n4js.n4JS.UnaryExpression in project n4js by eclipse.

the class GuardFactory method createGuardForTypeof.

private static Guard createGuardForTypeof(EObject topContainer, UnaryExpression ue, boolean negateTree, boolean negateEqe, Expression rhs) {
    if (rhs instanceof StringLiteral) {
        StringLiteral rhsStringLit = (StringLiteral) rhs;
        String lit = rhsStringLit.getValue();
        if (!"undefined".equals(lit)) {
            return null;
        }
    }
    Expression typeofExpr = ue.getExpression();
    if (SymbolFactory.canCreate(typeofExpr)) {
        GuardAssertion asserts = FlowAssertionFactory.getGuard(topContainer, ue.eContainer(), negateTree, negateEqe);
        Guard guard = createIsUndefinedGuard(ue, asserts, typeofExpr);
        return guard;
    }
    return null;
}