C try / catch implementation.

• thread safe
• nested calls
• automatic throwing up if it is impossible to find match at its level

• POSIX-compatible environment
• C99 compiler with GNU extensions (GCC 2.95+, Clang 1.0+, MinGW)

TRY(
    THROW(int,4);
)CATCH(int,x)(
    printf("int %d\n",x);
)

examples are in main.c

• in TRY block do not call return and goto
• EXCEPTION always rewrites by last one