# -*- tcl -*-

# Testing the handling of various simple grammars for specific inputs,
# using both interpretation and generated parsers.

# -------------------------------------------------------------------------

proc makei {g} {
    set p [pt::peg::interp P]
    $p use $g
    return $p
}

proc makep {g suffix} {
    # Generate a snit parser for G, then make an instance to
    # handle the actual parsing of the input.
    pt::peg::to::tclparam reset
    pt::peg::to::tclparam configure -name TEMPLATE$suffix
    pt::peg::to::tclparam configure -file TEST$suffix

    pt::tclparam::configuration::snit def \
	PARSER$suffix SNIT_PACKAGE$suffix 1 \
	{pt::peg::to::tclparam configure}

    set c [pt::peg::to::tclparam convert [$g serialize]]

    # The catch is required because the generated code ends in
    # 'return' (ending the code in the file). This command must not
    # stop us from setting this up in memory.
    catch { uplevel 1 $c }

    return [::PARSER$suffix P]
}

proc reformat {ast} {
    return [join [split [pt::ast print $ast] \n]]
}

# -------------------------------------------------------------------------

foreach {k section expected} {
    0 leaf  {<Grammar> :: 0 1     <String> :: 0 1}
    1 value {<Grammar> :: 0 1     <String> :: 0 1}
    2 void  {<Grammar> :: 0 1}
} {
    # Set the grammar up...
    set g [pt::peg::container G]
    $g start {n Grammar}
    $g add   Grammar String
    $g modes [list Grammar value String $section]
    $g rules {
	Grammar {n String}
	String  {x {t b} {* {t a}} {t c}}
    }

    test pt-runtime-rde:${rdeimpl}-stack:${stackimpl}-1.$k "$section, pt::peg::interp, X* (bracketed)" -setup {
	set p [makei $g]
    } -body {
	reformat [$p parset {bc}]
    } -cleanup {
	$p destroy
    } -result $expected

    test pt-runtime-rde:${rdeimpl}-stack:${stackimpl}-2.$k "$section, pt::peg::to::tclparam/snit, X* (bracketed)" -setup {
	set p [makep $g $k$section]
    } -body {
	reformat [$p parset {bc}]
    } -cleanup {
	$p destroy
    } -result $expected

    $g destroy
}

# -------------------------------------------------------------------------

foreach {k section expected} {
    0 leaf  {<Grammar> :: 0 1     <String> :: 1 0}
    1 value {<Grammar> :: 0 1     <String> :: 1 0}
    2 void  {<Grammar> :: 0 1}
} {
    # Set the grammar up
    set g [pt::peg::container G]
    $g start {n Grammar}
    $g add   Grammar String
    $g modes [list Grammar value String $section]
    $g rules {
	Grammar {x {t b} {n String} {t c}}
	String  {* {t a}}
    }

    test pt-runtime-rde:${rdeimpl}-stack:${stackimpl}-3.$k "$section, pt::peg::interp, X* (alone)" -setup {
	set p [makei $g]
    } -body {
	reformat [$p parset {bc}]
    } -cleanup {
	$p destroy
    } -result $expected

    test pt-runtime-rde:${rdeimpl}-stack:${stackimpl}-4.$k "$section, pt::peg::to::tclparam/snit, X* (alone)" -setup {
	set p [makep $g $k$section]
    } -body {
	reformat [$p parset {bc}]
    } -cleanup {
	$p destroy
    } -result $expected

    $g destroy
}

# -------------------------------------------------------------------------

foreach {k section expected} {
    0 leaf  {<Grammar> :: 0 1     <String> :: 1 0}
    1 value {<Grammar> :: 0 1     <String> :: 1 0}
    2 void  {<Grammar> :: 0 1}
} {
    # Set the grammar up
    set g [pt::peg::container G]
    $g start {n Grammar}
    $g add   Grammar String
    $g modes [list Grammar value String $section]
    $g rules {
	Grammar {x {t b} {n String} {t c}}
	String  {? {t a}}
    }

    test pt-runtime-rde:${rdeimpl}-stack:${stackimpl}-5.$k "$section, pt::peg::interp, X? (alone)" -setup {
	set p [makei $g]
    } -body {
	reformat [$p parset {bc}]
    } -cleanup {
	$p destroy
    } -result $expected

    test pt-runtime-rde:${rdeimpl}-stack:${stackimpl}-6.$k "$section, pt::peg::to::tclparam/snit, X? (alone)" -setup {
	set p [makep $g $k$section]
    } -body {
	reformat [$p parset {bc}]
    } -cleanup {
	$p destroy
    } -result $expected

    $g destroy
}

#----------------------------------------------------------------------
unset p g k section expected
rename makep {}
rename makei {}