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Document exp_descriptor.op_name should never return NULL.

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This documents a constaint that struct exp_descriptor's "op_name"
method implementation should obey.  This might not have been part
of the initial design, but is currently true of all instantiations,
and already assumed by the current users.

gdb/ChangeLog:

        * parser-defs.h (struct exp_descriptor): Document constraint
        on return value for "op_name" callbacks.
This commit is contained in:
Joel Brobecker
2012-10-19 19:55:56 +00:00
parent 67d004eb5f
commit a5b1262727
2 changed files with 9 additions and 1 deletions
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5
gdb/parser-defs.h
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@@ -335,7 +335,10 @@ struct exp_descriptor
void *data),
void *data);
/* Name of this operator for dumping purposes. */
/* Name of this operator for dumping purposes.
The returned value should never be NULL, even if EXP_OPCODE is
an unknown opcode (a string containing an image of the numeric
value of the opcode can be returned, for instance). */
char *(*op_name) (enum exp_opcode);
/* Dump the rest of this (prefix) expression after the operator