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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| class ARE::Actions is HLL::Actions; | ||
|
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||
| method TOP($/) { | ||
| my $past := buildsub( $<nibbler>.ast ); | ||
| $past.node($/); | ||
| make $past; | ||
| } | ||
|
|
||
| method nibbler($/) { | ||
| my $past; | ||
| if +$<termish> > 1 { | ||
| $past := PAST::Regex.new( :pasttype('alt'), :node($/) ); | ||
| for $<termish> { $past.push($_.ast); } | ||
| } | ||
| else { | ||
| $past := $<termish>[0].ast; | ||
| } | ||
| make $past; | ||
| } | ||
|
|
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| method termish($/) { | ||
| my $past := PAST::Regex.new( :pasttype('concat'), :node($/) ); | ||
| my $lastlit := 0; | ||
| for $<noun> { | ||
| my $ast := $_.ast; | ||
| if $ast { | ||
| if $lastlit && $ast.pasttype eq 'literal' | ||
| && !PAST::Node.ACCEPTS($ast[0]) { | ||
| $lastlit[0] := $lastlit[0] ~ $ast[0]; | ||
| } | ||
| else { | ||
| $past.push($ast); | ||
| $lastlit := $ast.pasttype eq 'literal' | ||
| && !PAST::Node.ACCEPTS($ast[0]) | ||
| ?? $ast !! 0; | ||
| } | ||
| } | ||
| } | ||
| make $past; | ||
| } | ||
|
|
||
| method quantified_atom($/) { | ||
| my $past := $<atom>.ast; | ||
| if $<quantifier> { | ||
| my $qast := $<quantifier>[0].ast; | ||
| $qast.unshift($past); | ||
| $past := $qast; | ||
| } | ||
| make $past; | ||
| } | ||
|
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||
| method atom($/) { | ||
| my $past := $<metachar> | ||
| ?? $<metachar>.ast | ||
| !! PAST::Regex.new( ~$/, :pasttype<literal>, :node($/) ); | ||
| make $past; | ||
| } | ||
|
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| method quantifier:sym<*>($/) { | ||
| make PAST::Regex.new( :pasttype<quant>, :node($/) ); | ||
| } | ||
| method quantifier:sym<+>($/) { | ||
| make PAST::Regex.new( :pasttype<quant>, :min(1), :node($/) ); | ||
| } | ||
| method quantifier:sym<?>($/) { | ||
| make PAST::Regex.new( :pasttype<quant>, :min(0), :max(1), :node($/) ); | ||
| } | ||
|
|
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| method metachar:sym<.>($/) { | ||
| make PAST::Regex.new( :pasttype<charclass>, :subtype<.>, :node($/) ); | ||
| } | ||
|
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| method metachar:sym<back>($/) { make $<backslash>.ast; } | ||
|
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| method backslash:sym<w>($/) { | ||
| make PAST::Regex.new( :pasttype<charclass>, :subtype(~$<sym>), :node($/)); | ||
| } | ||
|
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||
| sub buildsub($rpast, $block = PAST::Block.new() ) { | ||
| $rpast := PAST::Regex.new( | ||
| PAST::Regex.new( :pasttype('scan') ), | ||
| $rpast, | ||
| PAST::Regex.new( :pasttype('pass') ), | ||
| :pasttype('concat'), | ||
| ); | ||
| unless $block.symbol('$¢') { $block.symbol('$¢', :scope<lexical>); } | ||
| unless $block.symbol('$/') { $block.symbol('$/', :scope<lexical>); } | ||
| $block.push($rpast); | ||
| $block.blocktype('method'); | ||
| $block; | ||
| } | ||
|
|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| class ARE::Compiler is HLL::Compiler { | ||
| INIT { | ||
| ARE::Compiler.parsegrammar(ARE::Grammar); | ||
| ARE::Compiler.parseactions(ARE::Actions); | ||
| ARE::Compiler.language('ARE'); | ||
| } | ||
| } | ||
|
|
||
|
|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| grammar ARE::Grammar is HLL::Grammar; | ||
|
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||
| token TOP { | ||
| <nibbler> | ||
| [ $ || <.panic: 'Confused'> ] | ||
| } | ||
|
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| token nibbler { | ||
| <termish> [ '|' <termish> ]* | ||
| } | ||
|
|
||
| token termish { | ||
| <noun=.quantified_atom>+ | ||
| } | ||
|
|
||
| token quantified_atom { | ||
| <atom> <quantifier>? | ||
| } | ||
|
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||
| token atom { | ||
| [ | ||
| | \w [ \w+! <?before \w> ]? | ||
| | <metachar> | ||
| ] | ||
| } | ||
|
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||
| proto token quantifier { <...> } | ||
| token quantifier:sym<*> { <sym> } | ||
| token quantifier:sym<+> { <sym> } | ||
| token quantifier:sym<?> { <sym> } | ||
|
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| proto token metachar { <...> } | ||
| token metachar:sym<.> { <sym> } | ||
| token metachar:sym<back> { \\ <backslash> } | ||
|
|
||
| proto token backslash { <...> } | ||
| token backslash:sym<w> { $<sym>=[<[dswDSW]>] } | ||
|
|
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