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gdb.texinfo (Values From Inferior): Clarify that

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value.dynamic_type works only in C++ programs with RTTI.
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Eli Zaretskii
2010-09-22 09:13:31 +00:00
parent d487497340
commit fccd1d1e5f
2 changed files with 17 additions and 6 deletions
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5
gdb/doc/ChangeLog
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@ -1,3 +1,8 @@
2010-09-22 Eli Zaretskii <eliz@gnu.org>
* gdb.texinfo (Values From Inferior): Clarify that
value.dynamic_type works only in C++ programs with RTTI.
2010-09-15 Paul Bolle <pebolle@tiscali.nl> 2010-09-15 Paul Bolle <pebolle@tiscali.nl>
* gdb.texinfo (Character Sets): Correctly reference host-charset * gdb.texinfo (Character Sets): Correctly reference host-charset

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gdb/doc/gdb.texinfo
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@ -20762,12 +20762,18 @@ The type of this @code{gdb.Value}. The value of this attribute is a
@defivar Value dynamic_type @defivar Value dynamic_type
The dynamic type of this @code{gdb.Value}. This uses C@t{++} run-time The dynamic type of this @code{gdb.Value}. This uses C@t{++} run-time
type information to determine the dynamic type of the value. If this type information (@acronym{RTTI}) to determine the dynamic type of the
value is of class type, it will return the class in which the value is value. If this value is of class type, it will return the class in
embedded, if any. If this value is of pointer or reference to a class which the value is embedded, if any. If this value is of pointer or
type, it will compute the dynamic type of the referenced object, and reference to a class type, it will compute the dynamic type of the
return a pointer or reference to that type, respectively. In all referenced object, and return a pointer or reference to that type,
other cases, it will return the value's static type. respectively. In all other cases, it will return the value's static
type.
Note that this feature will only work when debugging a C@t{++} program
that includes @acronym{RTTI} for the object in question. Otherwise,
it will just return the static type of the value as in @kbd{ptype foo}
(@pxref{Symbols, ptype}).
@end defivar @end defivar
@end table @end table