List of resolveBackReferences() Examples

Examples of resolveBackReferences()

org.jnode.shell.syntax.MuAlternation.resolveBackReferences()
org.jnode.shell.syntax.MuSyntax.resolveBackReferences()
Resolve any MuBackReference instances in this syntax tree.
The algorithm has the following limitations:
- References to ancestor syntax nodes (true back references) are guaranteed to be resolvable. References to sibling or cousin syntax nodes may not be resolvable, depending on whether or not the target is encountered before the reference in the tree traversal order.
- If SyntaxFailureException is thrown, the syntax tree may be left in a partially resolved state.
@throws SyntaxFailureException if any MuBackReference cannot be resolved.

Examples of org.jnode.shell.syntax.MuAlternation.resolveBackReferences()

    }


    @Test
    public void testResolveBackReferences() {
        MuSyntax syntax = new MuAlternation("root", new MuBackReference("root"), null);
        syntax.resolveBackReferences();
        Assert.assertEquals(((MuAlternation) syntax).getAlternatives()[0], syntax);


        syntax =
                new MuAlternation("root", new MuSequence(new MuBackReference("root"),
                        new MuBackReference("root")), null);

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Examples of org.jnode.shell.syntax.MuAlternation.resolveBackReferences()

        Assert.assertEquals(((MuAlternation) syntax).getAlternatives()[0], syntax);


        syntax =
                new MuAlternation("root", new MuSequence(new MuBackReference("root"),
                        new MuBackReference("root")), null);
        syntax.resolveBackReferences();
        MuSyntax[] tmp = ((MuAlternation) syntax).getAlternatives();
        Assert.assertEquals(((MuSequence) tmp[0]).getElements()[0], syntax);
        Assert.assertEquals(((MuSequence) tmp[0]).getElements()[1], syntax);


        try {

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Examples of org.jnode.shell.syntax.MuAlternation.resolveBackReferences()

        Assert.assertEquals(((MuSequence) tmp[0]).getElements()[0], syntax);
        Assert.assertEquals(((MuSequence) tmp[0]).getElements()[1], syntax);


        try {
            syntax = new MuAlternation("root", new MuBackReference("foo"), null);
            syntax.resolveBackReferences();
            Assert.fail("expected SFE");
        } catch (SyntaxFailureException ex) {
            // expected
        }
    }

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Examples of org.jnode.shell.syntax.MuAlternation.resolveBackReferences()


    @Test
    public void testFormat2() {
        MuSyntax syntax = new MuAlternation("root", new MuBackReference("root"), null);
        Assert.assertEquals("<root> ::= ( <[root]> |  )\n<[root]> ::= <root>", syntax.format());
        syntax.resolveBackReferences();
        Assert.assertEquals("<root> ::= ( <root> |  )", syntax.format());
    }
}

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Examples of org.jnode.shell.syntax.MuAlternation.resolveBackReferences()

            Assert.fail("expected SFE");
        } catch (SyntaxFailureException ex) {
            // expected
        }


        syntax.resolveBackReferences();
        cl = new CommandLine(new String[] {"a", "b"});
        parser.parse(syntax, null, cl.tokenIterator(), null);


        cl = new CommandLine(new String[] {"a", "a", "b"});
        parser.parse(syntax, null, cl.tokenIterator(), null);

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Examples of org.jnode.shell.syntax.MuAlternation.resolveBackReferences()

                new MuAlternation("root", new MuSequence(new MuSymbol("a"), new MuBackReference(
                        "root")), new MuSymbol("b"));
        MuParser parser = new MuParser();
        CommandLine cl;


        syntax.resolveBackReferences();


        cl = new CommandLine(new String[] {"b"});


        parser.parse(syntax, null, cl.tokenIterator(), null);

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Examples of org.jnode.shell.syntax.MuAlternation.resolveBackReferences()


        cl = new CommandLine(new String[] {"b"});


        parser.parse(syntax, null, cl.tokenIterator(), null);


        syntax.resolveBackReferences();
        cl = new CommandLine(new String[] {"a", "b"});
        parser.parse(syntax, null, cl.tokenIterator(), null);


        cl = new CommandLine(new String[] {"a", "a", "b"});
        parser.parse(syntax, null, cl.tokenIterator(), null);

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Examples of org.jnode.shell.syntax.MuAlternation.resolveBackReferences()

            new MuBackReference("root")), new MuSequence(new MuSymbol("b"), new MuSymbol("c"))),
            new MuAlternation(new MuSequence(new MuSymbol("a"), new MuBackReference("root")), new MuSymbol("b")));
        MuParser parser = new MuParser();
        CommandLine cl;


        syntax.resolveBackReferences();


        cl = new CommandLine(new String[] {"b"});


        parser.parse(syntax, null, cl.tokenIterator(), null);

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Examples of org.jnode.shell.syntax.MuAlternation.resolveBackReferences()


        cl = new CommandLine(new String[] {"b"});


        parser.parse(syntax, null, cl.tokenIterator(), null);


        syntax.resolveBackReferences();
        cl = new CommandLine(new String[] {"a", "b"});
        parser.parse(syntax, null, cl.tokenIterator(), null);


        cl = new CommandLine(new String[] {"a", "a", "b"});
        parser.parse(syntax, null, cl.tokenIterator(), null);

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Examples of org.jnode.shell.syntax.MuAlternation.resolveBackReferences()

                new MuAlternation("root", new MuSymbol("b"), new MuSequence(new MuBackReference(
                        "root"), new MuBackReference("root")));
        MuParser parser = new MuParser();
        CommandLine cl;


        syntax.resolveBackReferences();


        // This doesn't hit the infinite loop ...
        cl = new CommandLine(new String[] {"b"});
        parser.parse(syntax, null, cl.tokenIterator(), null);

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