#!/bin/bash

    # Modifiy the COMMAND variable to your taste, if your shell isn't
    # mentioned.  By specifying your COMMAND-shell last it will be used;
COMMAND="/usr/bin/tcsh -f"
#COMMAND=/bin/bash

    # Assuming bisonc++ is in your computer's search-path. If not, define
    # BISONCPP as the full path to bisconc++:
#BISONCPP=/home/frank/git/bisonc++/src/bisonc++/tmp/bin/binary
BISONCPP=bisonc++

    # UNCOMMENT the following variables if you want to run the examples from
    # the source distribution's documentation/regression directory rather than
    # from bisonc++ documentation's `regression' subdirectory.
SKEL=../../../../skeletons
BISONCPP="../../../../tmp/bin/binary -S ${SKEL}"

example()
{
    let EXAMPLE=${EXAMPLE}+1

    orgdir=`pwd`

    echo 
    echo Running example $1

    case $2 in
        ("go")
        ;;
        (*)
            return 0
        ;;
    esac

    cd $1
    cwd=`pwd`

    echo --------------------------------
    echo
    cat doc
    echo
    echo '(waiting for the compilation to complete ...)'
    echo --------------------------------
    
    cd parser
    echo $BISONCPP --construction $3 grammar

    $BISONCPP --construction --debug $3 grammar
    [ -e /usr/bin/bison -a -e bgram ] && bison -v bgram

    echo    
    if [ -s ../demo.cc ] 
    then
        cd ../scanner
        flexc++  lexer
        cd ..
        g++ $ICMAKE_CPPSTD -Wall -o demo *.cc */*.cc
        echo "ENTERING A SHELL: \`demo' runs the program, use \`exit' to return"
        echo "      (the grammar analysis is in the \`parser' subdirectory)"
    else    
        echo "ENTERING A SHELL: Inspect the results, use \`exit' to return"
    fi

    echo "bison's output is in \`bgram.output', bisonc++'s output in \`grammar.output'"
    echo
    $COMMAND

    cd $cwd

        # the doc-test is a safequard agains accidentally removing files

    [ -s doc ]                      &&  \
    find ./ -type f                     \
        \(                              \
            -name Parser*h      -or     \
            -name parserbase.h  -or     \
            -name scannerbase.h         \
        \)                              \
        -exec rm '{}' ';'           &&  \
    find ./ -type f                     \
        -not -regex '.*/_.*'            \
        -not -name doc                  \
        -not -name demo.cc              \
        -not -name bgram                \
        -not -name grammar              \
        -not -regex '.*/*h'             \
        -not -regex '.*/dallas.*'       \
        -not -name input                \
        -not -name lexer                \
        -exec rm '{}' ';'

    cd $orgdir
    tput clear
}

readRUN()
{
    read RUN
    if [ "$RUN" == "" ] 
    then 
        RUN=go
    else
        RUN=skip
        tput clear
    fi
}

tput clear

echo "
    This script feeds several grammars to bisonc++. Some grammars allow you to
execute a little demo-program. Some examples do not have demo programs. All
grammars are also fed to bison \(if existing\), producing their output on a file
\`bgram.output' Bisonc++'s output is provided in the file \`grammar.output'

    From the various test/parser directories, bisonc++ should be accessible as

$BISONCPP

    If that's not true for you, consider changing the BISONCPP variable in
this script.

    With each example, hitting a plain Enter creates the parser and optionally
builds the demo-program

    Note that bison always defines one additional state compared with
bisonc++. Bison accepts its input in a separate state, whereas bisonc++
accepts when <EOF> is seen in combination with the reduction of the
the augmented grammar rule G* -> G . Bisonc++ will not execute an action here,
but that should be ok, since the grammar specification does not make G* -> G
visible, so no action can be associated with its reduction anyway.

[press Enter to continue]
"

read RUN
tput clear
echo


EXAMPLE=1
PRE="Enter x to skip; a plain Enter to run; ^c to end this script"

echo $EXAMPLE: AHO Example 4.42, p. 231
echo $PRE
readRUN
example aho4.42 $RUN

echo $EXAMPLE: two R/R conflicts
echo $PRE
readRUN
example rr2 $RUN

echo $EXAMPLE: the dangling-else conflict
echo $PRE
readRUN
example danglingelse $RUN

echo $EXAMPLE: S/R and R/R conflicts
echo $PRE
readRUN
example conflicts $RUN

echo $EXAMPLE: not derivable sentence
echo $PRE
readRUN
example nosentence $RUN

echo $EXAMPLE: a reduced icmake V 7.00 grammar
echo $PRE
readRUN
example icmake1 $RUN

echo $EXAMPLE: the full icmake V 7.00 grammar
echo $PRE
readRUN
example icmake2 $RUN

echo $EXAMPLE: using an error-production
echo $PRE
readRUN
example error $RUN

echo "$EXAMPLE: Simple ;-separated list of numbers and error recovery"
echo $PRE
readRUN
example naive $RUN

echo $EXAMPLE: adding two integral values
echo $PRE
readRUN
example simplecalc $RUN

echo $EXAMPLE: using the location stack
echo $PRE
readRUN
example location $RUN

echo $EXAMPLE: the man-page calculator
echo $PRE
readRUN
example calculator $RUN

echo $EXAMPLE: a calculator from the C++ Annotations
echo $PRE
readRUN
example annotations $RUN

echo $EXAMPLE: an extensive calculator supporting functions
echo $PRE
readRUN
example fun $RUN

echo $EXAMPLE: an example of polymorphic semantic values
echo $PRE
readRUN
example polymorphic $RUN --insert-stype

echo $EXAMPLE: a grammar in which reduces precede shifts
echo $PRE
readRUN
example mandayam $RUN


tput clear

echo "
    END OF SCRIPT
"