/*
 * NAME
 *      yacc_many - how to use yacc several times in the same directory
 *
 * DESCRIPTION
 *      This cookbook describes how to use yacc.
 *      The difference with the "yacc" cookbook is that this cookbook
 *      allows you to have more that one yacc generated parser in the same
 *      program, by using the classic sed(1) hack of the output.
 *
 *      You will have to add "-d" to the [yacc_flags] variable
 *      if you want %.h files generated.
 *
 *      If a y.output file is constructed, it will be moved to %.list
 *
 * RECIPES
 *      %.c %.h: %.y    applied if -d in [yacc_flags]
 *      %.c: %.y        applied if -d not in [yacc_flags]
 *
 * VARIABLES
 *      yacc_src        Yacc source files in the current directory.
 *      dot_src         Source files constructable in the current directory
 *                      (unioned with existing setting, if necessary).
 *      dot_obj         Object files constructable in the current directory
 *                      (unioned with existing setting, if necessary).
 *      dot_clean       Files which may be removed from the current directory
 *                      in a clean target.
 *      dot_lint_obj    Lint object files constructable in the current directory
 *                      (unioned with existing setting, if necessary).
 * Copyright (C) 2007 Peter Miller
 */

#pragma once

#include "c"

if [not [defined yacc]] then
        yacc = yacc;
if [not [defined yacc_flags]] then
        yacc_flags = ;
yacc_src = [glob *.y];
cc_src = [stringset [cc_src] - [fromto %.y %.c [yacc_src]]];
dot_src =
        [stringset
                [dot_src] [yacc_src]
        -
                [fromto %.y %.c [yacc_src]] [fromto %.y %.s [yacc_src]]
        ];
dot_obj = [stringset [dot_obj] [fromto %.y %.o [yacc_src]]];
dot_clean =
        [stringset
                [dot_clean]
                [fromto %.y %.o [yacc_src]]
                [fromto %.y %.c [yacc_src]]
                [fromto %.y %.list [yacc_src]]
                [fromto %.y %.ln [yacc_src]]
                [fromto %.y %.s [yacc_src]]
                y.tab.c y.tab.h y.output
        ];
dot_lint_obj = [stringset [dot_lint_obj] [fromto %.y %.ln [yacc_src]]];


%.c %.h: %.y
        if [in -d [yacc_flags]]
        single-thread y.tab.c y.tab.h y.output
{
        if [exists %.list] then
                rm -f %.list
                        set clearstat;
        if [exists y.output] then
                rm -f y.output
                        set clearstat;
        [yacc] [yacc_flags] %.y;
        sed -e \'s/\[yY\]\[yY\]/%_/g\' y.tab.c > %.c;
        rm -f y.tab.c;
        sed -e \'s/\[yY\]\[yY\]/%_/g\' y.tab.h > %.h;
        rm -f y.tab.h;
        if [exists y.output] then
                mv y.output %.list
                        set clearstat;
}

%.c: %.y
        if [not [in -d [yacc_flags]]]
        single-thread y.tab.c y.output
{
        if [exists %.list] then
                rm -f %.list
                        set clearstat;
        if [exists y.output] then
                rm -f y.output
                        set clearstat;
        [yacc] [yacc_flags] %.y;
        sed -e \'s/\[yY\]\[yY\]/%_/g\' y.tab.c > %.c;
        rm -f y.tab.c;
        if [exists y.output] then
                mv y.output %.list
                        set clearstat;
}