Get rid of options in test filenames (part 1).

This commit adds a comment with options to the beginning of each .re file.
Because of the added line all test results had to be updated (line numbers
in line directives, error messages, warnings, etc. have increased by one).

The testing script run_test.sh has been changed to use options in the
comments rather than options in the filenames.

Conversion has been done almost automatically (except for a few rare tricky
cases) with the following horrible Bash script:

  #!/bin/bash

  for f in `find . -name '*.re'`; do
    switches=`basename "$f" | sed \
        -e 's/^[^.]*\.re$//g' \
        -e 's/^[^.]*\.\(.*\)\.re$/\1/g' \
        -e 's,[+],/,g' \
        -e 's/^\([^-]\)/-\1/' \
        -e 's/--\([^ (-]*\)/ --\1/g' \
        -e 's/(\([^)]*\))/ \1/g' \
    `
    ext=`basename "$f" | grep -q -- '--lang(go)' && echo go || echo c`
    x="${f%.re}.$ext"
    ff="$f.mod"
    xx="$x.mod"
    linedirs=`egrep -q -- '(#|//)line' "$x" && echo 1 || echo 0`
    dot=`echo "$switches" | fgrep -q -- ' --emit-dot' && echo 1 || echo 0`
    skel=`echo "$switches" | fgrep -q -- ' --skeleton' && echo 1 || echo 0`
    if [ $ext == c ]; then
        l='// re2c $INPUT -o $OUTPUT '"$switches"
    else
        switches=`echo "$switches" | sed 's/ --lang go//'`
        l='//go:generate re2go $INPUT -o $OUTPUT '"$switches"
    fi
    nocomment=0
    if [ "$(tail -n 1 $x | fgrep -q 'error: ' ; echo $?)" -eq 0 ]; then
        nocomment=1
    elif [ $dot -eq 1 ]; then
        nocomment=1
    elif [ $skel -eq 1 ]; then
        nocomment=1
    fi

    echo "$l" > "$ff"
    cat "$f" >> "$ff"
    if [ $linedirs -eq 0 ]; then
        head -n 1 "$x" > "$xx"
        if [ $nocomment -eq 0 ]; then echo "$l" >> "$xx"; fi
        tail -n +2 "$x" >> "$xx"
    else
        head -n  2 "$x" > "$x.head"
        tail -n +3 "$x" > "$x.tail"
        if [ $nocomment -eq 0 ]; then echo "$l" >> "$x.head"; fi
        if [ $ext == c ]; then
            e='s/^([ \t]*#line )([0-9]+)(.*\.re"|.*\.c")$/($1).($2+1).($3)/eg'
        else
            e='s/^(\/\/line ".*".)([0-9]+)$/($1).($2+1)/eg'
        fi
        perl -p -i -e "$e" "$x.tail"
        cat "$x.head" "$x.tail" > "$xx"
        rm "$x.head" "$x.tail"
    fi

    a="$(basename $f | sed -E -e 's/([()])/\\\1/g' -e 's/\./\\./g')"
    perl -p -i -e 's/^(.*'"$a"'[:(])([0-9]+)(.*)$/($1).($2+1).($3)/eg' "$xx"
    perl -p -i -e 's/^(.*shadowed by rule at line )([0-9]+)(.*)$/($1).($2+1).($3)/eg' "$xx"
    perl -p -i -e 's/^(.* already defined at line )([0-9]+)(.*)$/($1).($2+1).($3)/eg' "$xx"
    if [ $skel -eq 1 ]; then
        perl -p -i -e 's/^(.*[_.]line)([0-9]+)(.*)$/($1).($2+1).($3)/eg' "$xx"
    fi
  done

  find . -name '*.re' -o -name '*.c' -o -name '*.go' | xargs rm
  for f in `find . -name '*.mod'` ; do mv "$f" "${f%.mod}" ; done

Author: skvadrik