Mercurial > jdk8-mips64-public > langtools / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/test/tools/javac/ForwardReference/UseBeforeDeclaration.java	Wed Apr 27 01:34:52 2016 +0800
     1.3 @@ -0,0 +1,63 @@
     1.4 +/*
     1.5 + * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved.
     1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     1.7 + *
     1.8 + * This code is free software; you can redistribute it and/or modify it
     1.9 + * under the terms of the GNU General Public License version 2 only, as
    1.10 + * published by the Free Software Foundation.
    1.11 + *
    1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
    1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    1.14 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    1.15 + * version 2 for more details (a copy is included in the LICENSE file that
    1.16 + * accompanied this code).
    1.17 + *
    1.18 + * You should have received a copy of the GNU General Public License version
    1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
    1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    1.21 + *
    1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
    1.23 + * or visit www.oracle.com if you need additional information or have any
    1.24 + * questions.
    1.25 + */
    1.26 +
    1.27 +/*
    1.28 + * @test
    1.29 + * @bug 4459133
    1.30 + * @summary Forward reference legal or illegal?
    1.31 + * @author gafter
    1.32 + *
    1.33 + * @compile UseBeforeDeclaration.java
    1.34 + */
    1.35 +
    1.36 +class UseBeforeDeclaration {
    1.37 +    static {
    1.38 +        x = 100; // ok - assignment
    1.39 +//      int y = ((x)) + 1; // error - read before declaration
    1.40 +        int v = ((x)) = 3; // ok - x at left hand side of assignment
    1.41 +        int z = UseBeforeDeclaration.x * 2; // ok - not accessed via simple name
    1.42 +        Object o = new Object(){
    1.43 +                void foo(){x++;} // ok - occurs in a different class
    1.44 +                {x++;} // ok - occurs in a different class
    1.45 +            };
    1.46 +    }
    1.47 +    {
    1.48 +        j = 200; // ok - assignment
    1.49 +//      j = j + 1; // error - right hand side reads before declaration
    1.50 +//      int k = j = j + 1; // error - right hand side reads before declaration
    1.51 +        int n = j = 300; // ok - j at left hand side of assignment
    1.52 +//      int h = j++; // error - read before declaration
    1.53 +        int l = this.j * 3; // ok - not accessed via simple name
    1.54 +        Object o = new Object(){
    1.55 +                void foo(){j++;} // ok - occurs in a different class
    1.56 +                { j = j + 1;} // ok - occurs in a different class
    1.57 +            };
    1.58 +    }
    1.59 +    int w = x= 3; // ok - x at left hand side of assignment
    1.60 +    int p = x; // ok - instance initializers may access static fields
    1.61 +    static int u = (new Object(){int bar(){return x;}}).bar(); // ok - occurs in a different class
    1.62 +    static int x;
    1.63 +    int m = j = 4; // ok - j at left hand side of assignment
    1.64 +    int o = (new Object(){int bar(){return j;}}).bar(); // ok - occurs in a different class
    1.65 +    int j;
    1.66 +}