/
Mapping.pir
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Mapping.pir
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## $Id$
=head1 NAME
src/classes/Mapping.pir - Perl 6 hash class and related functions
=head1 Methods
=cut
.namespace ['Mapping']
.sub 'onload' :anon :load :init
.local pmc p6meta, mappingproto
p6meta = get_hll_global ['Perl6Object'], '$!P6META'
mappingproto = p6meta.'new_class'('Mapping', 'parent'=>'parrot;Hash Any')
$P0 = get_hll_global 'Associative'
$P0 = $P0.'!select'()
p6meta.'add_role'($P0, 'to'=>mappingproto)
p6meta.'register'('Hash', 'parent'=>mappingproto, 'protoobject'=>mappingproto)
$P0 = get_hll_namespace ['Mapping']
'!EXPORT'('keys,kv,values', 'from'=>$P0, 'to_p6_multi'=>1)
.end
=head2 Methods
=over
=item fmt
our Str multi Mapping::fmt ( Str $format = "%s\t%s", $separator = "\n" )
Returns the invocant mapping formatted by an implicit call to C<.fmt> on
every pair, joined by newlines or an explicitly given separator.
=cut
.sub 'fmt' :method :multi() :subid('mapping_fmt')
.param string format :optional
.param int has_format :opt_flag
.param string sep :optional
.param int has_sep :opt_flag
.local pmc it
.local pmc rv
if has_format goto have_format
format = "%s\t%s"
have_format:
if has_sep goto have_sep
sep = "\n"
have_sep:
it = self.'iterator'()
rv = new ['List']
loop:
.local pmc pairfmt
.local pmc pair
unless it goto end
pair = shift it
pairfmt = pair.'fmt'(format)
push rv, pairfmt
goto loop
end:
rv = 'join'(sep, rv)
.return(rv)
.end
.sub '' :init :load
.local pmc block, signature
.const 'Sub' $P0 = "mapping_fmt"
block = $P0
signature = new ["Signature"]
setprop block, "$!signature", signature
signature."!add_param"("$format")
signature."!add_param"("$sep", 1 :named('optional'))
$P0 = get_hll_global 'Mapping'
signature."!add_implicit_self"($P0)
'!TOPERL6MULTISUB'(block)
.end
=item iterator()
=cut
.sub 'iterator' :method :multi() :subid('mapping_iterator')
.local pmc it
.local pmc rv
it = iter self
rv = new ['List']
loop:
.local string key
.local pmc pair
.local pmc val
unless it goto end
key = shift it
val = it[key]
pair = 'infix:=>'(key, val)
push rv, pair
goto loop
end:
.return (rv)
.end
.sub '' :init :load
.local pmc block, signature
.const 'Sub' $P0 = "mapping_iterator"
block = $P0
signature = new ["Signature"]
setprop block, "$!signature", signature
$P0 = get_hll_global 'Mapping'
signature."!add_implicit_self"($P0)
'!TOPERL6MULTISUB'(block)
.end
=item keys()
Returns keys of hash as a List
=cut
.sub 'keys' :method :multi() :subid('mapping_keys')
.local pmc it
.local pmc rv
it = self.'iterator'()
rv = new ['List']
loop:
.local string key
.local pmc pair
unless it goto end
pair = shift it
key = pair.'key'()
push rv, key
goto loop
end:
.return (rv)
.end
.sub '' :init :load
.local pmc block, signature
.const 'Sub' $P0 = "mapping_keys"
block = $P0
signature = new ["Signature"]
setprop block, "$!signature", signature
$P0 = get_hll_global 'Mapping'
signature."!add_implicit_self"($P0)
.end
=item kv (method)
Returns elements of hash as array of C<Pair(key, value)>
=cut
.sub 'kv' :method :multi() :subid('mapping_kv')
.local pmc it
.local pmc rv
it = self.'iterator'()
rv = new ['List']
loop:
.local string key
.local pmc pair
.local pmc val
unless it goto end
pair = shift it
key = pair.'key'()
val = pair.'value'()
push rv, key
push rv, val
goto loop
end:
.return (rv)
.end
.sub '' :init :load
.local pmc block, signature
.const 'Sub' $P0 = "mapping_kv"
block = $P0
signature = new ["Signature"]
setprop block, "$!signature", signature
$P0 = get_hll_global 'Mapping'
signature."!add_implicit_self"($P0)
.end
=item list()
Return invocant as a List of Pairs.
=cut
.sub 'list' :method
.tailcall self.'iterator'()
.end
=item pairs (method)
Returns elements of hash as array of C<Pairs>
=cut
.sub 'pairs' :method :multi() :subid('mapping_pairs')
.tailcall self.'iterator'()
.end
.sub '' :init :load
.local pmc block, signature
.const 'Sub' $P0 = "mapping_pairs"
block = $P0
signature = new ["Signature"]
setprop block, "$!signature", signature
$P0 = get_hll_global 'Mapping'
signature."!add_implicit_self"($P0)
'!TOPERL6MULTISUB'(block)
.end
=item perl()
Return perl representation of the invocant.
=cut
.sub 'perl' :method :subid('mapping_perl')
.local string rv
.local pmc it
rv = '{'
it = self.'iterator'()
unless it goto done
loop:
$P1 = shift it
$S1 = $P1.'perl'()
rv .= $S1
unless it goto done
rv .= ', '
goto loop
done:
rv .= '}'
.return (rv)
.end
.sub '' :init :load
.local pmc block, signature
.const 'Sub' $P0 = "mapping_perl"
block = $P0
signature = new ["Signature"]
setprop block, "$!signature", signature
$P0 = get_hll_global 'Mapping'
signature."!add_implicit_self"($P0)
.end
=item reverse
=cut
.namespace ['Mapping']
.sub 'reverse' :method :subid('mapping_reverse')
.local pmc it
.local pmc rv
rv = new ['Perl6Hash']
it = self.'iterator'()
loop:
.local string key
.local pmc pair
.local pmc val
unless it goto end
pair = shift it
key = pair.'key'()
val = pair.'value'()
rv[val] = key
goto loop
end:
.return (rv)
.end
.sub '' :init :load
.local pmc block, signature
.const 'Sub' $P0 = "mapping_reverse"
block = $P0
signature = new ["Signature"]
setprop block, "$!signature", signature
$P0 = get_hll_global 'Mapping'
signature."!add_implicit_self"($P0)
.end
=item values()
Returns values of hash as a List
=cut
.sub 'values' :method :multi() :subid('mapping_values')
.local pmc it
.local pmc rv
it = self.'iterator'()
rv = new ['List']
loop:
.local pmc pair
.local pmc val
unless it goto end
pair = shift it
val = pair.'value'()
push rv, val
goto loop
end:
.return (rv)
.end
.sub '' :init :load
.local pmc block, signature
.const 'Sub' $P0 = "mapping_values"
block = $P0
signature = new ["Signature"]
setprop block, "$!signature", signature
$P0 = get_hll_global 'Mapping'
signature."!add_implicit_self"($P0)
.end
=back
=head2 Coercion methods
=over
=item Scalar
When we're going to be stored as an item, become a Hash and
return a Perl6Scalar with it.
=cut
.namespace ['Mapping']
.sub 'Scalar' :method
$P0 = self.'Hash'()
$P0 = root_new ['parrot';'Perl6Scalar'], $P0
.return ($P0)
.end
=item Str
Stringification of a Mapping
=cut
## FIXME: :vtable('get_string') is wrong here
.namespace ['Mapping']
.sub 'Str' :vtable('get_string') :method
.local string rv
.local pmc it
it = self.'iterator'()
rv = ''
loop:
.local string str
unless it goto end
str = shift it
rv .= str
rv .= "\n"
goto loop
end:
.return (rv)
.end
=back
=head2 Private methods
=over 4
=item !flatten()
Flatten the invocant, as in list context.
=cut
.sub '!flatten' :method
.tailcall self.'iterator'()
.end
=back
=cut
# Local Variables:
# mode: pir
# fill-column: 100
# End:
# vim: expandtab shiftwidth=4 ft=pir: