base

編譯器的虛擬yacc工具

   set VYACC		=	${INSTALL_BIN}/vyacc
   set TRANSFORM	=	${INSTALL_BIN}/pre_vyacc
   set LEXFIX		=	${INSTALL_BIN}/fix_lex
   set YACCFIX		=	${INSTALL_BIN}/yaccfix
   set INCLUDE_DIR	=	${VY}/Include
   set STEPPAR		=	${INCLUDE_DIR}/stepPar
   set CC		=	gcc
   set ECHOCMD		=	echo
   set FNAME		=	$1

#pretest the yaccablity, lexablity, and compilablity of .y and .l before traslation
   $ECHOCMD ""
   $ECHOCMD "Pretest ..."
   $ECHOCMD "   If no errors generated by this phase, your input is legal"
   $YACCFIX $FNAME.y
   yacc -d $FNAME.y.vy
   lex $FNAME.l
   $CC -o pretest.out y.tab.c lex.yy.c -ly -ll -lm
#run the parser through the tool
   $ECHOCMD "   Cleaning up pretest ..."
   rm pretest.out $FNAME.y.vy
   $ECHOCMD ""



   $ECHOCMD "Building ..."
   $ECHOCMD "   Preprocessing $FNAME.y ..."
   $TRANSFORM < $FNAME.y > ${FNAME}_pre.y
   $ECHOCMD "   Preprocessing $FNAME.l ..."
   $LEXFIX < $FNAME.l > ${FNAME}_pre.l
   $ECHOCMD "   Translating $FNAME.y ..."
   $VYACC < ${FNAME}_pre.y > ${FNAME}_vyacc.y
   $ECHOCMD "   Lexing ..."
   lex ${FNAME}_pre.l
   $ECHOCMD "   Yaccing translation ..."
   yacc -P $STEPPAR -d ${FNAME}_vyacc.y
#compile the result being sure to link with the vyacc libraries
   $ECHOCMD "   Compiling translation and lex.yy.c..."
   $CC -o $FNAME.out y.tab.c lex.yy.c -ly -ll -lm $MOTIF_LIB \
        -lXm -lXt  -lX11 -I$INCLUDE_DIR 	\
        -L$INSTALL_LIB -lvyacc
# clean up
    $ECHOCMD "Cleaning up ..."
    rm ${FNAME}_vyacc.y ${FNAME}_pre.y ${FNAME}_pre.l
    rm y.tab.* lex.yy.c
#tell how to use the result
   echo ""
   echo "To do a visualization type:"
   echo "    $FNAME.out < <input_string>"