Interactions of symbol-lookup with language

["Paul N. Hilfinger" <hilfingr@otisco.mckusick.com>]

David,

The symbol-lookup facilities are now organized to adapt themselves to
the current language.  We've encountered some problems with this.  

In particular, in decode_line_1, there is a call to find_imps, an
Objective C function, which in turn calls lookup_symbol.  When
decode_line_1 is called while in Ada mode, this latter lookup_symbol
acts like an Ada symbol lookup, which makes little sense given that
find_imps is concerned with Objective C code.  We have encountered
cases where the result is anomalous.  

Our fix for the moment is simply to put a wrapper around decode_objc
to force the language to objc temporarily.  We are a little
uncomfortable with submitting this kind of kludge publicly, and
would prefer something officially blessed.  One possibility is to have
a variant of lookup_symbol that allows one to specify a prevailing
language for those cases where it matters.  We have at least one other
place where we'd like to "look up a symbol as in C".  

In any case, we'd welcome your (and other maintainers') comments.

Paul Hilfinger
ACT, Inc.