src/3rdparty/webkit/JavaScriptCore/bytecompiler/LabelScope.h


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79

/*
 * Copyright (C) 2008 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef LabelScope_h
#define LabelScope_h

#include <wtf/PassRefPtr.h>
#include "Label.h"

namespace JSC {

    class Identifier;

    class LabelScope {
    public:
        enum Type { Loop, Switch, NamedLabel };

        LabelScope(Type type, const Identifier* name, int scopeDepth, PassRefPtr<Label> breakTarget, PassRefPtr<Label> continueTarget)
            : m_refCount(0)
            , m_type(type)
            , m_name(name)
            , m_scopeDepth(scopeDepth)
            , m_breakTarget(breakTarget)
            , m_continueTarget(continueTarget)
        {
        }

        void ref() { ++m_refCount; }
        void deref()
        {
            --m_refCount;
            ASSERT(m_refCount >= 0);
        }
        int refCount() const { return m_refCount; }

        Label* breakTarget() const { return m_breakTarget.get(); }
        Label* continueTarget() const { return m_continueTarget.get(); }

        Type type() const { return m_type; }
        const Identifier* name() const { return m_name; }
        int scopeDepth() const { return m_scopeDepth; }

    private:
        int m_refCount;
        Type m_type;
        const Identifier* m_name;
        int m_scopeDepth;
        RefPtr<Label> m_breakTarget;
        RefPtr<Label> m_continueTarget;
    };

} // namespace JSC

#endif // LabelScope_h

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106

# Commands covered:  incr
#
# This file contains the original set of tests for Tcl's incr command.
# Since the incr command is now compiled, a new set of tests covering
# the new implementation is in the file "incr.test". Sourcing this file
# into Tcl runs the tests and generates output for errors.
# No output means no errors were found.
#
# Copyright (c) 1991-1993 The Regents of the University of California.
# Copyright (c) 1994-1996 Sun Microsystems, Inc.
# Copyright (c) 1998-1999 by Scriptics Corporation.
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
# RCS: @(#) $Id: incr-old.test,v 1.3 1999/04/16 00:47:28 stanton Exp $

if {[lsearch [namespace children] ::tcltest] == -1} {
    source [file join [pwd] [file dirname [info script]] defs.tcl]
}

catch {unset x}

test incr-old-1.1 {basic incr operation} {
    set x 23
    list [incr x] $x
} {24 24}
test incr-old-1.2 {basic incr operation} {
    set x 106
    list [incr x -5] $x
} {101 101}
test incr-old-1.3 {basic incr operation} {
    set x "  -106"
    list [incr x 1] $x
} {-105 -105}
test incr-old-1.3 {basic incr operation} {
    set x "  +106"
    list [incr x 1] $x
} {107 107}

test incr-old-2.1 {incr errors} {
    list [catch incr msg] $msg
} {1 {wrong # args: should be "incr varName ?increment?"}}
test incr-old-2.2 {incr errors} {
    list [catch {incr a b c} msg] $msg
} {1 {wrong # args: should be "incr varName ?increment?"}}
test incr-old-2.3 {incr errors} {
    catch {unset x}
    list [catch {incr x} msg] $msg $errorInfo
} {1 {can't read "x": no such variable} {can't read "x": no such variable
    (reading value of variable to increment)
    invoked from within
"incr x"}}
test incr-old-2.4 {incr errors} {
    set x abc
    list [catch {incr x} msg] $msg $errorInfo
} {1 {expected integer but got "abc"} {expected integer but got "abc"
    while executing
"incr x"}}
test incr-old-2.5 {incr errors} {
    set x 123
    list [catch {incr x 1a} msg] $msg $errorInfo
} {1 {expected integer but got "1a"} {expected integer but got "1a"
    while executing
"incr x 1a"}}
test incr-old-2.6 {incr errors} {
    proc readonly args {error "variable is read-only"}
    set x 123
    trace var x w readonly
    list [catch {incr x 1} msg] $msg $errorInfo
} {1 {can't set "x": variable is read-only} {can't set "x": variable is read-only
    while executing
"incr x 1"}}
catch {unset x}
test incr-old-2.7 {incr errors} {
    set x -
    list [catch {incr x 1} msg] $msg
} {1 {expected integer but got "-"}}
test incr-old-2.8 {incr errors} {
    set x {  -  }
    list [catch {incr x 1} msg] $msg
} {1 {expected integer but got "  -  "}}
test incr-old-2.9 {incr errors} {
    set x +
    list [catch {incr x 1} msg] $msg
} {1 {expected integer but got "+"}}
test incr-old-2.10 {incr errors} {
    set x {20 x}
    list [catch {incr x 1} msg] $msg
} {1 {expected integer but got "20 x"}}

# cleanup
::tcltest::cleanupTests
return