mri-dev-build

./configure

alias dev-ruby-rebuild="make DESTDIR=./ruby_build uninstall && make && make DESTDIR=./ruby_build install"
alias dev-ruby="./ruby_build/usr/local/bin/ruby -I ./ruby_build/usr/local/lib/ruby/2.5.0 -I ./ruby_build/usr/local/lib/ruby/2.5.0/x86_64-darwin17"
alias dev-irb="dev-ruby -e 'binding.irb'"

trace.c

void trace(struct parser_params *p, enum lex_state_e state, char* message)
{
    YYDPRINTF (( p, "TRACING (%s):\n", message));
    if (CMDARG_P()) {
        YYDPRINTF (( p, "CMDARG_P() = true\n"));
    } else {
        YYDPRINTF (( p, "CMDARG_P() = false\n"));
    }
    YYDPRINTF (( p, "LEX_STATE:\n"));

    YYDPRINTF (( p, "IS_lex_state(EXPR_BEG): %lu\n", IS_lex_state(EXPR_BEG)  ));
    YYDPRINTF (( p, "IS_lex_state(EXPR_END): %lu\n", IS_lex_state(EXPR_END)  ));
    YYDPRINTF (( p, "IS_lex_state(EXPR_ENDARG): %lu\n", IS_lex_state(EXPR_ENDARG)  ));
    YYDPRINTF (( p, "IS_lex_state(EXPR_ENDFN): %lu\n", IS_lex_state(EXPR_ENDFN)  ));
    YYDPRINTF (( p, "IS_lex_state(EXPR_ARG): %lu\n", IS_lex_state(EXPR_ARG)  ));
    YYDPRINTF (( p, "IS_lex_state(EXPR_CMDARG): %lu\n", IS_lex_state(EXPR_CMDARG)  ));
    YYDPRINTF (( p, "IS_lex_state(EXPR_MID): %lu\n", IS_lex_state(EXPR_MID)  ));
    YYDPRINTF (( p, "IS_lex_state(EXPR_FNAME): %lu\n", IS_lex_state(EXPR_FNAME)  ));
    YYDPRINTF (( p, "IS_lex_state(EXPR_DOT): %lu\n", IS_lex_state(EXPR_DOT)  ));
    YYDPRINTF (( p, "IS_lex_state(EXPR_CLASS): %lu\n", IS_lex_state(EXPR_CLASS)  ));
    YYDPRINTF (( p, "IS_lex_state(EXPR_LABEL): %lu\n", IS_lex_state(EXPR_LABEL)  ));
    YYDPRINTF (( p, "IS_lex_state(EXPR_LABELED): %lu\n", IS_lex_state(EXPR_LABELED)  ));
    YYDPRINTF (( p, "IS_lex_state(EXPR_FITEM): %lu\n", IS_lex_state(EXPR_FITEM)  ));
    YYDPRINTF (( p, "IS_lex_state(EXPR_VALUE): %lu\n", IS_lex_state(EXPR_VALUE)  ));
}