c++ - GDB Python APIs: Doesn't .parse_and_eval() make .cast() and .dereference() redundant? -


i not able understand utility of 2 gdb-python apis, value.cast() , value.dereference(). feel gdb.parse_and_eval() can same thing these 2 guys ( , more ).

for example, can achieve value.cast("int*") gdb.parse_and_eval('(int*)value') , can achieve value.dereference() gdb.parse_and_eval(*value).

specifically have seen people use .dereference() dereference struct pointer some_struct_ptr.dereference()['some_var']. here feel .dereference() not needed @ all. some_struct_ptr['some_var'] produces exact same output.

am missing something?

parse_and_eval not want. unlike other operations, exposed user's current language setting, , other things set print object. and, if have gdb.value other computation, using parse_and_eval means must convert string first -- can pain if pretty-printers involved, instead safety have convert long , string.

it true dereference not needed if accessing member via pointer. gdb quirk got exposed via value. perhaps better.

while still think best use value api, isn't possible. example there no way assign way; , there other holes well.

that said, can write code like.


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