Removes 'proto' dir

See #137 for the issue.

Every header in the proto directory was:

* Given include guards in the form

    #ifndef NEOVIM_FILENAME_H
    #define NEOVIM_FILENAME_H
        ...
    #endif /* NEOVIM_FILENAM_H */

* Renamed from *.pro -> *.h
* Moved from src/proto/ to src/

This would have caused conficts with some existing headers in src/;
rather than merge these conflicts now (which is a whole other can of
worms involving multiple and conditional inclusion), any header in src/
with a conflicting name was renamed from *.h -> *_defs.h (which may or
may not actually describe its purpose, the change is purely a
namespacing issue).

Once all of these changes were made a script was developed to determine
what #includes needed to be added to each source file to describe its
dependencies and allow it to compile; because the script is so short
and I'll just list it here:

    #! /bin/bash

    cd $(dirname $0)

    # Scrapes `make` output for provided error messages and outputs #includes
    # needed to resolve them.
    #   $1 : part of the clang error message between filename and identifier
    list_missing_includes() {
        for file_missing_pair in $(CC=clang make 2>&1 >/dev/null | sed -n "s/\/\(.*\.[hc]\).*$1.*'\(.*\)'.*/\1:\2/p"); do
            fields=(${file_missing_pair//:/ })
            source_file=${fields[0]}
            missing_func=${fields[1]}
            # Try to find the declaration of the missing function.
            echo $(basename $source_file) \
                \#include \"$(grep -r "\b$missing_func __ARGS" | sed -n "s/.*\/\(.*\)\:.*/\1/p")\"
        # Remove duplicates
        done | sort | uniq
    }

    echo "Finding missing function prototypes..."
    list_missing_includes "implicit declaration of function"
    echo "Finding missing identifier declarations..."
    list_missing_includes "use of undeclared identifier"

Each list of required headers was added by hand in the following format:

    #include "vim.h"
    #include "*_defs.h"
    #include "filename.h"
    /* All other includes in same module here, in alphabetical order. */
    /* All includes from other modules (e.g. "os/*.h") here in alphabetical
     * order. */

1 files changed, 41 insertions, 0 deletions

diff --git a/src/ex_eval.h b/src/ex_eval.h
new file mode 100644
index 0000000000..3685899063
--- /dev/null
+++ b/src/ex_eval.h
@@ -0,0 +1,41 @@
+#ifndef NEOVIM_EX_EVAL_H
+#define NEOVIM_EX_EVAL_H
+/* ex_eval.c */
+int aborting __ARGS((void));
+void update_force_abort __ARGS((void));
+int should_abort __ARGS((int retcode));
+int aborted_in_try __ARGS((void));
+int cause_errthrow __ARGS((char_u *mesg, int severe, int *ignore));
+void free_global_msglist __ARGS((void));
+void do_errthrow __ARGS((struct condstack *cstack, char_u *cmdname));
+int do_intthrow __ARGS((struct condstack *cstack));
+char_u *get_exception_string __ARGS((void *value, int type, char_u *cmdname,
+                                     int *should_free));
+void discard_current_exception __ARGS((void));
+void report_make_pending __ARGS((int pending, void *value));
+void report_resume_pending __ARGS((int pending, void *value));
+void report_discard_pending __ARGS((int pending, void *value));
+void ex_if __ARGS((exarg_T *eap));
+void ex_endif __ARGS((exarg_T *eap));
+void ex_else __ARGS((exarg_T *eap));
+void ex_while __ARGS((exarg_T *eap));
+void ex_continue __ARGS((exarg_T *eap));
+void ex_break __ARGS((exarg_T *eap));
+void ex_endwhile __ARGS((exarg_T *eap));
+void ex_throw __ARGS((exarg_T *eap));
+void do_throw __ARGS((struct condstack *cstack));
+void ex_try __ARGS((exarg_T *eap));
+void ex_catch __ARGS((exarg_T *eap));
+void ex_finally __ARGS((exarg_T *eap));
+void ex_endtry __ARGS((exarg_T *eap));
+void enter_cleanup __ARGS((cleanup_T *csp));
+void leave_cleanup __ARGS((cleanup_T *csp));
+int cleanup_conditionals __ARGS((struct condstack *cstack, int searched_cond,
+                                 int inclusive));
+void rewind_conditionals __ARGS((struct condstack *cstack, int idx,
+                                 int cond_type,
+                                 int *cond_level));
+void ex_endfunction __ARGS((exarg_T *eap));
+int has_loop_cmd __ARGS((char_u *p));
+/* vim: set ft=c : */
+#endif /* NEOVIM_EX_EVAL_H */