[Bug c/41624] New: RFE: -fno-nested-functions

[Bug c/41624] New: RFE: -fno-nested-functions

[ajax at redhat dot com]

Nested functions in C are a serious misfeature, for any number of reasons (some
of which are even in the manual).  They should be something a project should be
able to ban the use of at the language level, without forcing a switch to
strict non-gnu mode.

Also, unlike most g89 language features, they seriously impede the ability of
the parser to tell you where syntax errors occur.  As it is, a missing }
doesn't get noticed until the end of the compilation unit; non-nested-function
dialects of C can fail at exactly the nested function declaration.


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           Summary: RFE: -fno-nested-functions
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ajax at redhat dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41624

[Bug c/41624] RFE: -fno-nested-functions

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2009-10-07 19:00 -------
I don't think they are a misfeature at all.  Ada for an example actually
requires nested functions even with the reasons we mention in the manual, that
is trampolines and such.  Fortran also has nested functions.

Now non local gotos are in my thoughts a more misfeature than nested functions.

Also some ABIs don't require a trampoline at all.  The PowerOpen/AIX/PowerPC64
Linux ABI does not require a trampoline and creates a function descriptor with
the needed chain pointer.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41624