/[jscoverage]/trunk/js/jsbool.h
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revision 332 by siliconforks, Thu Oct 23 19:03:33 2008 UTC revision 460 by siliconforks, Sat Sep 26 23:15:22 2009 UTC
# Line 43  Line 43 
43   * JS boolean interface.   * JS boolean interface.
44   */   */
45    
46    #include "jsapi.h"
47    
48  JS_BEGIN_EXTERN_C  JS_BEGIN_EXTERN_C
49    
50  /*  /*
# Line 52  Line 54 
54   * used in the interpreter to represent "no exception pending".  In general it   * used in the interpreter to represent "no exception pending".  In general it
55   * can be used to represent "no value".   * can be used to represent "no value".
56   *   *
57     * A JSVAL_HOLE can be cheaply converted to undefined without affecting any
58     * other boolean (or pseudo boolean) by masking out JSVAL_HOLE_MASK.
59     *
60   * JSVAL_ARETURN is used to throw asynchronous return for generator.close().   * JSVAL_ARETURN is used to throw asynchronous return for generator.close().
61   *   *
62   * NB: BOOLEAN_TO_JSVAL(2) is JSVAL_VOID (see jsapi.h).   * NB: PSEUDO_BOOLEAN_TO_JSVAL(2) is JSVAL_VOID (see jsapi.h).
63   */   */
64  #define JSVAL_HOLE      BOOLEAN_TO_JSVAL(3)  #define JSVAL_HOLE_FLAG jsval(4 << JSVAL_TAGBITS)
65  #define JSVAL_ARETURN   BOOLEAN_TO_JSVAL(4)  #define JSVAL_HOLE      (JSVAL_VOID | JSVAL_HOLE_FLAG)
66    #define JSVAL_ARETURN   PSEUDO_BOOLEAN_TO_JSVAL(8)
67    
68    static JS_ALWAYS_INLINE JSBool
69    JSVAL_TO_PUBLIC_PSEUDO_BOOLEAN(jsval v)
70    {
71        JS_ASSERT(v == JSVAL_TRUE || v == JSVAL_FALSE || v == JSVAL_VOID);
72        return JSVAL_TO_PSEUDO_BOOLEAN(v);
73    }
74    
75  extern JSClass js_BooleanClass;  extern JSClass js_BooleanClass;
76    
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