Re: completion for compilers (cc, gcc...) and -o

[Daniel Shahaf <d.s@xxxxxxxxxxxxxxxxxx>]

Vincent Lefevre wrote on Thu, 30 Apr 2020 22:54 +0200:
> Now I'm wondering whether there is a way to automatically apply
> the zstyle to the _gcc command list (I also sometimes use clang
> and so on).

This? —

zstyle -e ":completion::complete:*:option-o-1:" file-patterns '(( ${+funcstack[_gcc]} )) && reply=( … )'

---

More generally, I think it might be nice if the code evaluated by
«zstyle -e» could be told what context it's being looked up under.
Something like this:

% zstyle -e '*' foo 'echo $CONTEXT > /dev/tty'
% zstyle -s bar foo REPLY
bar
% 

(though the name $CONTEXT is already taken)

> I was also wondering whether there is a way to get the extension
> list automatically from the one in _gcc (assuming that it could
> evolve[*]).
> 

I don't know how likely it is to evolve, but I suppose we could drop
the list of extensions in a variable, «cc_extensions=( c h cc C cxx cpp
hpp )», then you'll be able to use «zstyle -e» to build on top of it?

> [*] On this subject, I'm quite sure I've already used the .cpp
> extension. I do not program in C++, but sometimes have to do
> some tests of small examples... I think that it should be added
> to the standard list, but C++ programmers may tell you more.

Sure.  This? —

diff --git a/Completion/Unix/Command/_gcc b/Completion/Unix/Command/_gcc
index 9ec09200e..20b3abe59 100644
--- a/Completion/Unix/Command/_gcc
+++ b/Completion/Unix/Command/_gcc
@@ -390,7 +390,7 @@ languages=(
 # generic options (from --help)
 args+=(
   '-###[print commands to run this compilation]'
-  '-o:output file:_files -g "^*.(c|h|cc|C|cxx)(-.)"'
+  '-o:output file:_files -g "^*.(c|h|cc|C|cxx|cpp|hpp)(-.)"'
   '-x[Specify the language of the following input files]:input file language:('"$languages"')'
   '+e-:virtual function definitions in classes:((0\:only\ interface 1\:generate\ code))'
   '-d-:dump:->dump'
@@ -1004,7 +1004,7 @@ args+=(
   '--help[Display this information]'
   '--no-warnings[Same as -w]'
   '--optimize[Same as -O]'
-  '--output[Same as -o]'
+  '--output:output file:_files -g "^*.(c|h|cc|C|cxx|cpp|hpp)(-.)"'
   '--param[Set parameter <param> to value.  See manpage for a complete list of parameters]:name=value'
   '--verbose[Same as -v]'
   '--version[Display version information]'

Cheers,