really remove regexp4...
Doug Coleman
parent
79da16bc5a
commit
f1fe2641b5
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@ -1,244 +0,0 @@
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USING: regexp4 tools.test kernel ;
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IN: regexp4-tests
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[ f ] [ "b" "a*" <regexp> matches? ] unit-test
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[ t ] [ "" "a*" <regexp> matches? ] unit-test
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[ t ] [ "a" "a*" <regexp> matches? ] unit-test
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[ t ] [ "aaaaaaa" "a*" <regexp> matches? ] unit-test
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[ f ] [ "ab" "a*" <regexp> matches? ] unit-test
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[ t ] [ "abc" "abc" <regexp> matches? ] unit-test
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[ t ] [ "a" "a|b|c" <regexp> matches? ] unit-test
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[ t ] [ "b" "a|b|c" <regexp> matches? ] unit-test
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[ t ] [ "c" "a|b|c" <regexp> matches? ] unit-test
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[ f ] [ "c" "d|e|f" <regexp> matches? ] unit-test
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[ f ] [ "aa" "a|b|c" <regexp> matches? ] unit-test
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[ f ] [ "bb" "a|b|c" <regexp> matches? ] unit-test
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[ f ] [ "cc" "a|b|c" <regexp> matches? ] unit-test
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[ f ] [ "cc" "d|e|f" <regexp> matches? ] unit-test
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[ f ] [ "" "a+" <regexp> matches? ] unit-test
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[ t ] [ "a" "a+" <regexp> matches? ] unit-test
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[ t ] [ "aa" "a+" <regexp> matches? ] unit-test
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[ t ] [ "" "a?" <regexp> matches? ] unit-test
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[ t ] [ "a" "a?" <regexp> matches? ] unit-test
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[ f ] [ "aa" "a?" <regexp> matches? ] unit-test
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[ f ] [ "" "." <regexp> matches? ] unit-test
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[ t ] [ "a" "." <regexp> matches? ] unit-test
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[ t ] [ "." "." <regexp> matches? ] unit-test
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! [ f ] [ "\n" "." <regexp> matches? ] unit-test
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[ f ] [ "" ".+" <regexp> matches? ] unit-test
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[ t ] [ "a" ".+" <regexp> matches? ] unit-test
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[ t ] [ "ab" ".+" <regexp> matches? ] unit-test
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[ t ] [ "" "a|b*|c+|d?" <regexp> matches? ] unit-test
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[ t ] [ "a" "a|b*|c+|d?" <regexp> matches? ] unit-test
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[ t ] [ "c" "a|b*|c+|d?" <regexp> matches? ] unit-test
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[ t ] [ "cc" "a|b*|c+|d?" <regexp> matches? ] unit-test
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[ f ] [ "ccd" "a|b*|c+|d?" <regexp> matches? ] unit-test
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[ t ] [ "d" "a|b*|c+|d?" <regexp> matches? ] unit-test
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[ t ] [ "foo" "foo|bar" <regexp> matches? ] unit-test
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[ t ] [ "bar" "foo|bar" <regexp> matches? ] unit-test
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[ f ] [ "foobar" "foo|bar" <regexp> matches? ] unit-test
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[ f ] [ "" "(a)" <regexp> matches? ] unit-test
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[ t ] [ "a" "(a)" <regexp> matches? ] unit-test
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[ f ] [ "aa" "(a)" <regexp> matches? ] unit-test
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[ t ] [ "aa" "(a*)" <regexp> matches? ] unit-test
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[ f ] [ "aababaaabbac" "(a|b)+" <regexp> matches? ] unit-test
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[ t ] [ "ababaaabba" "(a|b)+" <regexp> matches? ] unit-test
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[ f ] [ "" "a{1}" <regexp> matches? ] unit-test
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[ t ] [ "a" "a{1}" <regexp> matches? ] unit-test
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[ f ] [ "aa" "a{1}" <regexp> matches? ] unit-test
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[ f ] [ "a" "a{2,}" <regexp> matches? ] unit-test
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[ t ] [ "aaa" "a{2,}" <regexp> matches? ] unit-test
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[ t ] [ "aaaa" "a{2,}" <regexp> matches? ] unit-test
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[ t ] [ "aaaaa" "a{2,}" <regexp> matches? ] unit-test
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[ t ] [ "" "a{,2}" <regexp> matches? ] unit-test
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[ t ] [ "a" "a{,2}" <regexp> matches? ] unit-test
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[ t ] [ "aa" "a{,2}" <regexp> matches? ] unit-test
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[ f ] [ "aaa" "a{,2}" <regexp> matches? ] unit-test
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[ f ] [ "aaaa" "a{,2}" <regexp> matches? ] unit-test
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[ f ] [ "aaaaa" "a{,2}" <regexp> matches? ] unit-test
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[ f ] [ "" "a{1,3}" <regexp> matches? ] unit-test
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[ t ] [ "a" "a{1,3}" <regexp> matches? ] unit-test
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[ t ] [ "aa" "a{1,3}" <regexp> matches? ] unit-test
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[ t ] [ "aaa" "a{1,3}" <regexp> matches? ] unit-test
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[ f ] [ "aaaa" "a{1,3}" <regexp> matches? ] unit-test
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[ f ] [ "" "[a]" <regexp> matches? ] unit-test
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[ t ] [ "a" "[a]" <regexp> matches? ] unit-test
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[ t ] [ "a" "[abc]" <regexp> matches? ] unit-test
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[ f ] [ "b" "[a]" <regexp> matches? ] unit-test
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[ f ] [ "d" "[abc]" <regexp> matches? ] unit-test
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[ t ] [ "ab" "[abc]{1,2}" <regexp> matches? ] unit-test
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[ f ] [ "abc" "[abc]{1,2}" <regexp> matches? ] unit-test
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[ f ] [ "" "[^a]" <regexp> matches? ] unit-test
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[ f ] [ "a" "[^a]" <regexp> matches? ] unit-test
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[ f ] [ "a" "[^abc]" <regexp> matches? ] unit-test
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[ t ] [ "b" "[^a]" <regexp> matches? ] unit-test
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[ t ] [ "d" "[^abc]" <regexp> matches? ] unit-test
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[ f ] [ "ab" "[^abc]{1,2}" <regexp> matches? ] unit-test
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[ f ] [ "abc" "[^abc]{1,2}" <regexp> matches? ] unit-test
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[ t ] [ "]" "[]]" <regexp> matches? ] unit-test
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[ f ] [ "]" "[^]]" <regexp> matches? ] unit-test
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[ t ] [ "a" "[^]]" <regexp> matches? ] unit-test
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[ t ] [ "^" "[^]" <regexp> matches? ] must-fail
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[ t ] [ "^" "[]^]" <regexp> matches? ] unit-test
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[ t ] [ "]" "[]^]" <regexp> matches? ] unit-test
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[ t ] [ "[" "[[]" <regexp> matches? ] unit-test
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[ f ] [ "^" "[^^]" <regexp> matches? ] unit-test
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[ t ] [ "a" "[^^]" <regexp> matches? ] unit-test
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[ t ] [ "-" "[-]" <regexp> matches? ] unit-test
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[ f ] [ "a" "[-]" <regexp> matches? ] unit-test
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[ f ] [ "-" "[^-]" <regexp> matches? ] unit-test
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[ t ] [ "a" "[^-]" <regexp> matches? ] unit-test
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[ t ] [ "-" "[-a]" <regexp> matches? ] unit-test
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[ t ] [ "a" "[-a]" <regexp> matches? ] unit-test
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[ t ] [ "-" "[a-]" <regexp> matches? ] unit-test
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[ t ] [ "a" "[a-]" <regexp> matches? ] unit-test
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[ f ] [ "b" "[a-]" <regexp> matches? ] unit-test
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[ f ] [ "-" "[^-]" <regexp> matches? ] unit-test
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[ t ] [ "a" "[^-]" <regexp> matches? ] unit-test
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[ f ] [ "-" "[a-c]" <regexp> matches? ] unit-test
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[ t ] [ "-" "[^a-c]" <regexp> matches? ] unit-test
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[ t ] [ "b" "[a-c]" <regexp> matches? ] unit-test
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[ f ] [ "b" "[^a-c]" <regexp> matches? ] unit-test
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[ t ] [ "-" "[a-c-]" <regexp> matches? ] unit-test
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[ f ] [ "-" "[^a-c-]" <regexp> matches? ] unit-test
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[ t ] [ "\\" "[\\\\]" <regexp> matches? ] unit-test
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[ f ] [ "a" "[\\\\]" <regexp> matches? ] unit-test
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[ f ] [ "\\" "[^\\\\]" <regexp> matches? ] unit-test
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[ t ] [ "a" "[^\\\\]" <regexp> matches? ] unit-test
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[ t ] [ "0" "[\\d]" <regexp> matches? ] unit-test
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[ f ] [ "a" "[\\d]" <regexp> matches? ] unit-test
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[ f ] [ "0" "[^\\d]" <regexp> matches? ] unit-test
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[ t ] [ "a" "[^\\d]" <regexp> matches? ] unit-test
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[ t ] [ "a" "[a-z]{1,}|[A-Z]{2,4}|b*|c|(f|g)*" <regexp> matches? ] unit-test
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[ t ] [ "a" "[a-z]{1,2}|[A-Z]{3,3}|b*|c|(f|g)*" <regexp> matches? ] unit-test
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[ t ] [ "a" "[a-z]{1,2}|[A-Z]{3,3}" <regexp> matches? ] unit-test
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[ t ] [ "1000" "\\d{4,6}" <regexp> matches? ] unit-test
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[ t ] [ "1000" "[0-9]{4,6}" <regexp> matches? ] unit-test
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[ t ] [ "abc" "\\p{Lower}{3}" <regexp> matches? ] unit-test
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[ f ] [ "ABC" "\\p{Lower}{3}" <regexp> matches? ] unit-test
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[ t ] [ "ABC" "\\p{Upper}{3}" <regexp> matches? ] unit-test
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[ f ] [ "abc" "\\p{Upper}{3}" <regexp> matches? ] unit-test
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[ f ] [ "abc" "[\\p{Upper}]{3}" <regexp> matches? ] unit-test
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[ t ] [ "ABC" "[\\p{Upper}]{3}" <regexp> matches? ] unit-test
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[ t ] [ "" "\\Q\\E" <regexp> matches? ] unit-test
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[ f ] [ "a" "\\Q\\E" <regexp> matches? ] unit-test
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[ t ] [ "|*+" "\\Q|*+\\E" <regexp> matches? ] unit-test
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[ f ] [ "abc" "\\Q|*+\\E" <regexp> matches? ] unit-test
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[ t ] [ "s" "\\Qs\\E" <regexp> matches? ] unit-test
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[ t ] [ "S" "\\0123" <regexp> matches? ] unit-test
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[ t ] [ "SXY" "\\0123XY" <regexp> matches? ] unit-test
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[ t ] [ "x" "\\x78" <regexp> matches? ] unit-test
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[ f ] [ "y" "\\x78" <regexp> matches? ] unit-test
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[ t ] [ "x" "\\u000078" <regexp> matches? ] unit-test
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[ f ] [ "y" "\\u000078" <regexp> matches? ] unit-test
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[ t ] [ "ab" "a+b" <regexp> matches? ] unit-test
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[ f ] [ "b" "a+b" <regexp> matches? ] unit-test
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[ t ] [ "aab" "a+b" <regexp> matches? ] unit-test
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[ f ] [ "abb" "a+b" <regexp> matches? ] unit-test
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[ t ] [ "abbbb" "ab*" <regexp> matches? ] unit-test
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[ t ] [ "a" "ab*" <regexp> matches? ] unit-test
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[ f ] [ "abab" "ab*" <regexp> matches? ] unit-test
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[ f ] [ "x" "\\." <regexp> matches? ] unit-test
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[ t ] [ "." "\\." <regexp> matches? ] unit-test
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[ t ] [ "aaaab" "a+ab" <regexp> matches? ] unit-test
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[ f ] [ "aaaxb" "a+ab" <regexp> matches? ] unit-test
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[ t ] [ "aaacb" "a+cb" <regexp> matches? ] unit-test
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[ f ] [ "aaaab" "a++ab" <regexp> matches? ] unit-test
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[ t ] [ "aaacb" "a++cb" <regexp> matches? ] unit-test
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[ 3 ] [ "aaacb" "a*" <regexp> match-head ] unit-test
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[ 1 ] [ "aaacb" "a+?" <regexp> match-head ] unit-test
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[ 2 ] [ "aaacb" "aa?" <regexp> match-head ] unit-test
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[ 1 ] [ "aaacb" "aa??" <regexp> match-head ] unit-test
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[ 3 ] [ "aacb" "aa?c" <regexp> match-head ] unit-test
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[ 3 ] [ "aacb" "aa??c" <regexp> match-head ] unit-test
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! [ t ] [ "aaa" "AAA" t <regexp> matches? ] unit-test
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! [ f ] [ "aax" "AAA" t <regexp> matches? ] unit-test
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! [ t ] [ "aaa" "A*" t <regexp> matches? ] unit-test
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! [ f ] [ "aaba" "A*" t <regexp> matches? ] unit-test
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! [ t ] [ "b" "[AB]" t <regexp> matches? ] unit-test
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! [ f ] [ "c" "[AB]" t <regexp> matches? ] unit-test
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! [ t ] [ "c" "[A-Z]" t <regexp> matches? ] unit-test
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! [ f ] [ "3" "[A-Z]" t <regexp> matches? ] unit-test
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[ ] [
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"(0[lL]?|[1-9]\\d{0,9}(\\d{0,9}[lL])?|0[xX]\\p{XDigit}{1,8}(\\p{XDigit}{0,8}[lL])?|0[0-7]{1,11}([0-7]{0,11}[lL])?|([0-9]+\\.[0-9]*|\\.[0-9]+)([eE][+-]?[0-9]+)?[fFdD]?|[0-9]+([eE][+-]?[0-9]+[fFdD]?|([eE][+-]?[0-9]+)?[fFdD]))"
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<regexp> drop
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] unit-test
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[ t ] [ "fxxbar" "(?!foo).{3}bar" <regexp> matches? ] unit-test
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[ f ] [ "foobar" "(?!foo).{3}bar" <regexp> matches? ] unit-test
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! [ 3 ] [ "foobar" "foo(?=bar)" <regexp> match-head ] unit-test
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! [ f ] [ "foobxr" "foo(?=bar)" <regexp> match-head ] unit-test
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! [ f ] [ "foobxr" "foo\\z" <regexp> match-head ] unit-test
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! [ 3 ] [ "foo" "foo\\z" <regexp> match-head ] unit-test
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! [ 3 ] [ "foo bar" "foo\\b" <regexp> match-head ] unit-test
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! [ f ] [ "fooxbar" "foo\\b" <regexp> matches? ] unit-test
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! [ t ] [ "foo" "foo\\b" <regexp> matches? ] unit-test
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! [ t ] [ "foo bar" "foo\\b bar" <regexp> matches? ] unit-test
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! [ f ] [ "fooxbar" "foo\\bxbar" <regexp> matches? ] unit-test
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! [ f ] [ "foo" "foo\\bbar" <regexp> matches? ] unit-test
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! [ f ] [ "foo bar" "foo\\B" <regexp> matches? ] unit-test
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! [ 3 ] [ "fooxbar" "foo\\B" <regexp> match-head ] unit-test
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! [ t ] [ "foo" "foo\\B" <regexp> matches? ] unit-test
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! [ f ] [ "foo bar" "foo\\B bar" <regexp> matches? ] unit-test
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! [ t ] [ "fooxbar" "foo\\Bxbar" <regexp> matches? ] unit-test
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! [ f ] [ "foo" "foo\\Bbar" <regexp> matches? ] unit-test
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! [ t ] [ "s@f" "[a-z.-]@[a-z]" <regexp> matches? ] unit-test
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! [ f ] [ "a" "[a-z.-]@[a-z]" <regexp> matches? ] unit-test
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! [ t ] [ ".o" "\\.[a-z]" <regexp> matches? ] unit-test
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! Bug in parsing word
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[ t ] [
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"a"
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R' a'
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matches?
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] unit-test
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! ((A)(B(C)))
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! 1. ((A)(B(C)))
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! 2. (A)
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! 3. (B(C))
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! 4. (C)
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@ -1,701 +0,0 @@
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! Copyright (C) 2008 Doug Coleman.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors arrays assocs combinators kernel math
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sequences namespaces locals combinators.lib state-tables
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math.parser state-parser sets dlists unicode.categories
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math.order quotations shuffle math.ranges splitting
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symbols fry parser math.ranges inspector strings ;
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IN: regexp4
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SYMBOLS: eps start-state final-state beginning-of-text
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end-of-text left-parenthesis alternation left-bracket
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caret dash ampersand colon ;
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SYMBOL: runtime-epsilon
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TUPLE: regexp raw parentheses-count bracket-count
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state stack nfa new-states dfa minimized-dfa
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dot-matches-newlines? capture-group captured-groups ;
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TUPLE: capture-group n range ;
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ERROR: parentheses-underflow ;
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ERROR: unbalanced-parentheses ;
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ERROR: unbalanced-brackets ;
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: push-stack ( regexp token -- ) swap stack>> push ;
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: push-all-stack ( regexp seq -- ) swap stack>> push-all ;
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: next-state ( regexp -- n ) [ 1+ ] change-state state>> ;
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: check-parentheses-underflow ( regexp -- )
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parentheses-count>> 0 < [ parentheses-underflow ] when ;
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|
||||||
: check-unbalanced-parentheses ( regexp -- )
|
|
||||||
parentheses-count>> 0 > [ unbalanced-parentheses ] when ;
|
|
||||||
|
|
||||||
:: (apply-alternation) ( stack regexp -- )
|
|
||||||
[let | s2 [ stack peek first ]
|
|
||||||
s3 [ stack pop second ]
|
|
||||||
s0 [ stack peek alternation = [ stack pop* ] when stack peek first ]
|
|
||||||
s1 [ stack pop second ]
|
|
||||||
s4 [ regexp next-state ]
|
|
||||||
s5 [ regexp next-state ]
|
|
||||||
table [ regexp nfa>> ] |
|
|
||||||
s5 table add-row
|
|
||||||
s4 eps s0 <entry> table add-entry
|
|
||||||
s4 eps s2 <entry> table add-entry
|
|
||||||
s1 eps s5 <entry> table add-entry
|
|
||||||
s3 eps s5 <entry> table add-entry
|
|
||||||
s1 table final-states>> delete-at
|
|
||||||
s3 table final-states>> delete-at
|
|
||||||
t s5 table final-states>> set-at
|
|
||||||
s4 s5 2array stack push ] ;
|
|
||||||
|
|
||||||
: apply-alternation ( regexp -- )
|
|
||||||
[ stack>> ] [ (apply-alternation) ] bi ;
|
|
||||||
|
|
||||||
: apply-alternation? ( stack -- ? )
|
|
||||||
dup length dup 3 <
|
|
||||||
[ 2drop f ] [ 2 - swap nth alternation = ] if ;
|
|
||||||
|
|
||||||
:: (apply-concatenation) ( stack regexp -- )
|
|
||||||
[let* |
|
|
||||||
s2 [ stack peek first ]
|
|
||||||
s3 [ stack pop second ]
|
|
||||||
s0 [ stack peek first ]
|
|
||||||
s1 [ stack pop second ]
|
|
||||||
table [ regexp nfa>> ] |
|
|
||||||
s1 eps s2 <entry> table set-entry
|
|
||||||
s1 table final-states>> delete-at
|
|
||||||
s3 table add-row
|
|
||||||
s0 s3 2array stack push ] ;
|
|
||||||
|
|
||||||
: apply-concatenation ( regexp -- )
|
|
||||||
[ stack>> ] [ (apply-concatenation) ] bi ;
|
|
||||||
|
|
||||||
: apply-concatenation? ( seq -- ? )
|
|
||||||
dup length dup 2 <
|
|
||||||
[ 2drop f ] [ 2 - swap nth array? ] if ;
|
|
||||||
|
|
||||||
: apply-loop ( seq regexp -- seq regexp )
|
|
||||||
over length 1 > [
|
|
||||||
2dup over apply-alternation?
|
|
||||||
[ (apply-alternation) ] [ (apply-concatenation) ] if apply-loop
|
|
||||||
] when ;
|
|
||||||
|
|
||||||
: cut-out ( vector n -- vector' vector ) cut rest ;
|
|
||||||
|
|
||||||
: cut-stack ( obj vector -- vector' vector )
|
|
||||||
tuck last-index cut-out swap ;
|
|
||||||
|
|
||||||
: apply-til-last ( regexp token -- )
|
|
||||||
swap [ cut-stack ] change-stack
|
|
||||||
apply-loop stack>> push-all ;
|
|
||||||
|
|
||||||
: concatenation-loop ( regexp -- )
|
|
||||||
dup stack>> dup apply-concatenation?
|
|
||||||
[ over (apply-concatenation) concatenation-loop ] [ 2drop ] if ;
|
|
||||||
|
|
||||||
:: apply-kleene-closure ( regexp -- )
|
|
||||||
[let* | stack [ regexp stack>> ]
|
|
||||||
s0 [ stack peek first ]
|
|
||||||
s1 [ stack pop second ]
|
|
||||||
s2 [ regexp next-state ]
|
|
||||||
s3 [ regexp next-state ]
|
|
||||||
table [ regexp nfa>> ] |
|
|
||||||
s1 table final-states>> delete-at
|
|
||||||
t s3 table final-states>> set-at
|
|
||||||
s3 table add-row
|
|
||||||
s1 eps s0 <entry> table add-entry
|
|
||||||
s2 eps s0 <entry> table add-entry
|
|
||||||
s2 eps s3 <entry> table add-entry
|
|
||||||
s1 eps s3 <entry> table add-entry
|
|
||||||
s2 s3 2array stack push ] ;
|
|
||||||
|
|
||||||
: add-numbers ( n obj -- obj )
|
|
||||||
2dup [ number? ] bi@ and
|
|
||||||
[ + ] [ dup sequence? [ [ + ] with map ] [ nip ] if ] if ;
|
|
||||||
|
|
||||||
: increment-columns ( n assoc -- )
|
|
||||||
dup [ >r swap >r add-numbers r> r> set-at ] curry with* assoc-each ;
|
|
||||||
|
|
||||||
:: copy-state-rows ( regexp range -- )
|
|
||||||
[let* | len [ range range-length ]
|
|
||||||
offset [ regexp state>> range range-min - 1+ ]
|
|
||||||
state [ regexp [ len + ] change-state ] |
|
|
||||||
regexp nfa>> rows>>
|
|
||||||
[ drop range member? ] assoc-filter
|
|
||||||
[
|
|
||||||
[ offset + ] dip
|
|
||||||
[ offset swap add-numbers ] assoc-map
|
|
||||||
] assoc-map
|
|
||||||
regexp nfa>> [ assoc-union ] change-rows drop
|
|
||||||
range [ range-min ] [ range-max ] bi [ offset + ] bi@ 2array
|
|
||||||
regexp stack>> push ] ;
|
|
||||||
|
|
||||||
: last-state ( regexp -- range )
|
|
||||||
stack>> peek first2 [a,b] ;
|
|
||||||
|
|
||||||
: set-last-state-final ( ? regexp -- )
|
|
||||||
[ stack>> peek second ] [ nfa>> final-states>> ] bi set-at ;
|
|
||||||
|
|
||||||
: apply-plus-closure ( regexp -- )
|
|
||||||
[ dup last-state copy-state-rows ]
|
|
||||||
[ apply-kleene-closure ]
|
|
||||||
[ apply-concatenation ] tri ;
|
|
||||||
|
|
||||||
: apply-question-closure ( regexp -- )
|
|
||||||
[ stack>> peek first2 eps swap <entry> ] [ nfa>> add-entry ] bi ;
|
|
||||||
|
|
||||||
: with0 ( obj n quot -- n quot' ) swapd curry ; inline
|
|
||||||
|
|
||||||
: copy-state ( regexp state n -- )
|
|
||||||
[ copy-state-rows ] with0 with0 times ;
|
|
||||||
|
|
||||||
:: (exactly-n) ( regexp state n -- )
|
|
||||||
regexp state n copy-state
|
|
||||||
t regexp set-last-state-final ;
|
|
||||||
|
|
||||||
: exactly-n ( regexp n -- )
|
|
||||||
>r dup last-state r> 1- (exactly-n) ;
|
|
||||||
|
|
||||||
: exactly-n-concatenated ( regexp state n -- )
|
|
||||||
[ (exactly-n) ] 3keep
|
|
||||||
nip 1- [ apply-concatenation ] with0 times ;
|
|
||||||
|
|
||||||
:: at-least-n ( regexp n -- )
|
|
||||||
[let | state [ regexp stack>> pop first2 [a,b] ] |
|
|
||||||
regexp state n copy-state
|
|
||||||
state regexp stack>> push
|
|
||||||
regexp apply-kleene-closure ] ;
|
|
||||||
|
|
||||||
: pop-last ( regexp -- range )
|
|
||||||
stack>> pop first2 [a,b] ;
|
|
||||||
|
|
||||||
:: at-most-n ( regexp n -- )
|
|
||||||
[let | state [ regexp pop-last ] |
|
|
||||||
regexp state n [ 1+ exactly-n-concatenated ] with with each
|
|
||||||
regexp n 1- [ apply-alternation ] with0 times
|
|
||||||
regexp apply-question-closure ] ;
|
|
||||||
|
|
||||||
:: from-m-to-n ( regexp m n -- )
|
|
||||||
[let | state [ regexp pop-last ] |
|
|
||||||
regexp state
|
|
||||||
m n [a,b] [ exactly-n-concatenated ] with with each
|
|
||||||
regexp n m - [ apply-alternation ] with0 times ] ;
|
|
||||||
|
|
||||||
: apply-brace-closure ( regexp from/f to/f comma? -- )
|
|
||||||
[
|
|
||||||
2dup and
|
|
||||||
[ from-m-to-n ]
|
|
||||||
[ [ nip at-most-n ] [ at-least-n ] if* ] if
|
|
||||||
] [ drop exactly-n ] if ;
|
|
||||||
|
|
||||||
:: push-single-nfa ( regexp obj -- )
|
|
||||||
[let | s0 [ regexp next-state ]
|
|
||||||
s1 [ regexp next-state ]
|
|
||||||
stack [ regexp stack>> ]
|
|
||||||
table [ regexp nfa>> ] |
|
|
||||||
s0 obj s1 <entry> table set-entry
|
|
||||||
s1 table add-row
|
|
||||||
t s1 table final-states>> set-at
|
|
||||||
s0 s1 2array stack push ] ;
|
|
||||||
|
|
||||||
: set-start-state ( regexp -- )
|
|
||||||
dup stack>> dup empty? [
|
|
||||||
2drop
|
|
||||||
] [
|
|
||||||
[ nfa>> ] [ pop first ] bi* >>start-state drop
|
|
||||||
] if ;
|
|
||||||
|
|
||||||
: ascii? ( n -- ? ) 0 HEX: 7f between? ;
|
|
||||||
: octal-digit? ( n -- ? ) CHAR: 0 CHAR: 7 between? ;
|
|
||||||
: decimal-digit? ( n -- ? ) CHAR: 0 CHAR: 9 between? ;
|
|
||||||
|
|
||||||
: hex-digit? ( n -- ? )
|
|
||||||
[
|
|
||||||
[ dup decimal-digit? ]
|
|
||||||
[ dup CHAR: a CHAR: f between? ]
|
|
||||||
[ dup CHAR: A CHAR: F between? ]
|
|
||||||
] || nip ;
|
|
||||||
|
|
||||||
: control-char? ( n -- ? )
|
|
||||||
[
|
|
||||||
[ dup 0 HEX: 1f between? ]
|
|
||||||
[ dup HEX: 7f = ]
|
|
||||||
] || nip ;
|
|
||||||
|
|
||||||
: punct? ( n -- ? )
|
|
||||||
"!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~" member? ;
|
|
||||||
|
|
||||||
: c-identifier-char? ( ch -- ? )
|
|
||||||
[ [ dup alpha? ] [ dup CHAR: _ = ] ] || nip ;
|
|
||||||
|
|
||||||
: java-blank? ( n -- ? )
|
|
||||||
{
|
|
||||||
CHAR: \s CHAR: \t CHAR: \n
|
|
||||||
HEX: b HEX: 7 CHAR: \r
|
|
||||||
} member? ;
|
|
||||||
|
|
||||||
: java-printable? ( n -- ? )
|
|
||||||
[ [ dup alpha? ] [ dup punct? ] ] || nip ;
|
|
||||||
|
|
||||||
ERROR: bad-character-class obj ;
|
|
||||||
|
|
||||||
: parse-posix-class ( -- quot )
|
|
||||||
next
|
|
||||||
CHAR: { expect
|
|
||||||
[ get-char CHAR: } = ] take-until
|
|
||||||
{
|
|
||||||
{ "Lower" [ [ letter? ] ] }
|
|
||||||
{ "Upper" [ [ LETTER? ] ] }
|
|
||||||
{ "ASCII" [ [ ascii? ] ] }
|
|
||||||
{ "Alpha" [ [ Letter? ] ] }
|
|
||||||
{ "Digit" [ [ digit? ] ] }
|
|
||||||
{ "Alnum" [ [ alpha? ] ] }
|
|
||||||
{ "Punct" [ [ punct? ] ] }
|
|
||||||
{ "Graph" [ [ java-printable? ] ] }
|
|
||||||
{ "Print" [ [ java-printable? ] ] }
|
|
||||||
{ "Blank" [ [ " \t" member? ] ] }
|
|
||||||
{ "Cntrl" [ [ control-char? ] ] }
|
|
||||||
{ "XDigit" [ [ hex-digit? ] ] }
|
|
||||||
{ "Space" [ [ java-blank? ] ] }
|
|
||||||
! TODO: unicode-character-class, fallthrough in unicode is bad-char-clss
|
|
||||||
[ bad-character-class ]
|
|
||||||
} case ;
|
|
||||||
|
|
||||||
ERROR: bad-octal number ;
|
|
||||||
|
|
||||||
: parse-octal ( -- n )
|
|
||||||
next get-char drop
|
|
||||||
3 take oct>
|
|
||||||
dup 255 > [ bad-octal ] when ;
|
|
||||||
|
|
||||||
ERROR: bad-hex number ;
|
|
||||||
|
|
||||||
: parse-short-hex ( -- n )
|
|
||||||
next 2 take hex>
|
|
||||||
dup number? [ bad-hex ] unless ;
|
|
||||||
|
|
||||||
: parse-long-hex ( -- n )
|
|
||||||
next 6 take hex>
|
|
||||||
dup number? [ bad-hex ] unless ;
|
|
||||||
|
|
||||||
: parse-control-character ( -- n )
|
|
||||||
next get-char ;
|
|
||||||
|
|
||||||
: dot-construction ( regexp -- )
|
|
||||||
[ CHAR: \n = not ] push-single-nfa ;
|
|
||||||
|
|
||||||
: front-anchor-construction ( regexp -- )
|
|
||||||
drop ;
|
|
||||||
|
|
||||||
: back-anchor-construction ( regexp -- )
|
|
||||||
drop ;
|
|
||||||
|
|
||||||
: parse-brace ( -- from/f to/f comma? )
|
|
||||||
next
|
|
||||||
[ get-char CHAR: } = ] take-until
|
|
||||||
"," split1 [ [ string>number ] bi@ ] keep >boolean ;
|
|
||||||
|
|
||||||
TUPLE: character-class members ;
|
|
||||||
TUPLE: character-class-range from to ;
|
|
||||||
TUPLE: negated-character-class < character-class ;
|
|
||||||
TUPLE: negated-character-class-range < character-class-range ;
|
|
||||||
TUPLE: intersection-class < character-class ;
|
|
||||||
TUPLE: negated-intersection-class < intersection-class ;
|
|
||||||
|
|
||||||
GENERIC: character-class-contains? ( obj character-class -- ? )
|
|
||||||
|
|
||||||
: parse-escaped-until ( -- seq )
|
|
||||||
[ get-char CHAR: \ = get-next CHAR: E = and ] take-until
|
|
||||||
next ;
|
|
||||||
|
|
||||||
: character-class-predicate ( seq -- quot )
|
|
||||||
boa '[ , character-class-contains? ] ;
|
|
||||||
|
|
||||||
ERROR: unmatched-escape-sequence ;
|
|
||||||
|
|
||||||
: (parse-escaped) ( regexp ? ch -- obj )
|
|
||||||
{
|
|
||||||
{ CHAR: \ [ [ CHAR: \ = ] ] }
|
|
||||||
{ CHAR: t [ [ CHAR: \t = ] ] }
|
|
||||||
{ CHAR: n [ [ CHAR: \n = ] ] }
|
|
||||||
{ CHAR: r [ [ CHAR: \r = ] ] }
|
|
||||||
{ CHAR: f [ [ HEX: c = ] ] }
|
|
||||||
{ CHAR: a [ [ HEX: 7 = ] ] }
|
|
||||||
{ CHAR: e [ [ HEX: 1b = ] ] }
|
|
||||||
|
|
||||||
{ CHAR: d [ [ digit? ] ] }
|
|
||||||
{ CHAR: D [ [ digit? not ] ] }
|
|
||||||
{ CHAR: s [ [ java-blank? ] ] }
|
|
||||||
{ CHAR: S [ [ java-blank? not ] ] }
|
|
||||||
{ CHAR: w [ [ c-identifier-char? ] ] }
|
|
||||||
{ CHAR: W [ [ c-identifier-char? not ] ] }
|
|
||||||
|
|
||||||
{ CHAR: p [ parse-posix-class ] }
|
|
||||||
{ CHAR: P [ parse-posix-class [ not ] compose ] }
|
|
||||||
{ CHAR: x [ parse-short-hex ] }
|
|
||||||
{ CHAR: u [ parse-long-hex ] }
|
|
||||||
{ CHAR: 0 [ parse-octal ] }
|
|
||||||
{ CHAR: c [ parse-control-character ] }
|
|
||||||
|
|
||||||
! { CHAR: Q [ next parse-escaped-until ] }
|
|
||||||
! { CHAR: E [ unmatched-escape-sequence ] }
|
|
||||||
|
|
||||||
! { CHAR: b [ ] } ! a word boundary
|
|
||||||
! { CHAR: B [ ] } ! a non-word boundary
|
|
||||||
! { CHAR: A [ ] } ! beginning of input
|
|
||||||
! { CHAR: G [ ] } ! end of previous match
|
|
||||||
! { CHAR: Z [ ] } ! end of input but for the final terminator, if any
|
|
||||||
! { CHAR: z [ ] } ! end of the input
|
|
||||||
[ ]
|
|
||||||
} case ;
|
|
||||||
|
|
||||||
: parse-escaped ( regexp -- )
|
|
||||||
next get-char (parse-escaped) push-single-nfa ;
|
|
||||||
|
|
||||||
: handle-dash ( vector -- vector )
|
|
||||||
[ dup dash eq? [ drop CHAR: - ] when ] map ;
|
|
||||||
|
|
||||||
M: object character-class-contains? ( obj1 obj2 -- ? )
|
|
||||||
= ;
|
|
||||||
|
|
||||||
M: callable character-class-contains? ( obj1 callable -- ? )
|
|
||||||
call ;
|
|
||||||
|
|
||||||
M: character-class character-class-contains? ( obj cc -- ? )
|
|
||||||
members>> [ character-class-contains? ] with find drop >boolean ;
|
|
||||||
|
|
||||||
M: negated-character-class character-class-contains? ( obj cc -- ? )
|
|
||||||
call-next-method not ;
|
|
||||||
|
|
||||||
M: character-class-range character-class-contains? ( obj cc -- ? )
|
|
||||||
[ from>> ] [ to>> ] bi between? ;
|
|
||||||
|
|
||||||
M: negated-character-class-range character-class-contains? ( obj cc -- ? )
|
|
||||||
call-next-method not ;
|
|
||||||
|
|
||||||
M: intersection-class character-class-contains? ( obj cc -- ? )
|
|
||||||
members>> [ character-class-contains? not ] with find drop not ;
|
|
||||||
|
|
||||||
M: negated-intersection-class character-class-contains? ( obj cc -- ? )
|
|
||||||
call-next-method not ;
|
|
||||||
|
|
||||||
ERROR: unmatched-negated-character-class class ;
|
|
||||||
|
|
||||||
: handle-caret ( obj -- seq class )
|
|
||||||
dup [ length 2 >= ] [ first caret eq? ] bi and [
|
|
||||||
rest negated-character-class
|
|
||||||
] [
|
|
||||||
character-class
|
|
||||||
] if ;
|
|
||||||
|
|
||||||
: make-character-class ( regexp -- )
|
|
||||||
left-bracket over stack>> cut-stack
|
|
||||||
pick (>>stack)
|
|
||||||
handle-dash handle-caret
|
|
||||||
character-class-predicate push-single-nfa ;
|
|
||||||
|
|
||||||
: apply-dash ( regexp -- )
|
|
||||||
stack>> dup [ pop ] [ pop* ] [ pop ] tri
|
|
||||||
swap character-class-range boa swap push ;
|
|
||||||
|
|
||||||
: apply-dash? ( regexp -- ? )
|
|
||||||
stack>> dup length 3 >=
|
|
||||||
[ [ length 2 - ] keep nth dash eq? ] [ drop f ] if ;
|
|
||||||
|
|
||||||
DEFER: parse-character-class
|
|
||||||
: (parse-character-class) ( regexp -- )
|
|
||||||
[
|
|
||||||
next get-char
|
|
||||||
{
|
|
||||||
{ CHAR: [ [
|
|
||||||
[ 1+ ] change-bracket-count dup left-bracket push-stack
|
|
||||||
parse-character-class
|
|
||||||
] }
|
|
||||||
{ CHAR: ] [
|
|
||||||
[ 1- ] change-bracket-count
|
|
||||||
make-character-class
|
|
||||||
] }
|
|
||||||
{ CHAR: - [ dash push-stack ] }
|
|
||||||
! { CHAR: & [ ampersand push-stack ] }
|
|
||||||
! { CHAR: : [ semicolon push-stack ] }
|
|
||||||
{ CHAR: \ [ next get-char (parse-escaped) push-stack ] }
|
|
||||||
{ f [ unbalanced-brackets ] }
|
|
||||||
[ dupd push-stack dup apply-dash? [ apply-dash ] [ drop ] if ]
|
|
||||||
} case
|
|
||||||
] [
|
|
||||||
dup bracket-count>> 0 >
|
|
||||||
[ (parse-character-class) ] [ drop ] if
|
|
||||||
] bi ;
|
|
||||||
|
|
||||||
: parse-character-class-second ( regexp -- )
|
|
||||||
get-next
|
|
||||||
{
|
|
||||||
{ CHAR: [ [ CHAR: [ push-stack next ] }
|
|
||||||
{ CHAR: ] [ CHAR: ] push-stack next ] }
|
|
||||||
{ CHAR: - [ CHAR: - push-stack next ] }
|
|
||||||
[ 2drop ]
|
|
||||||
} case ;
|
|
||||||
|
|
||||||
: parse-character-class-first ( regexp -- )
|
|
||||||
get-next
|
|
||||||
{
|
|
||||||
{ CHAR: ^ [ caret dupd push-stack next parse-character-class-second ] }
|
|
||||||
{ CHAR: [ [ CHAR: [ push-stack next ] }
|
|
||||||
{ CHAR: ] [ CHAR: ] push-stack next ] }
|
|
||||||
{ CHAR: - [ CHAR: - push-stack next ] }
|
|
||||||
[ 2drop ]
|
|
||||||
} case ;
|
|
||||||
|
|
||||||
: parse-character-class ( regexp -- )
|
|
||||||
[ parse-character-class-first ] [ (parse-character-class) ] bi ;
|
|
||||||
|
|
||||||
ERROR: unsupported-token token ;
|
|
||||||
: parse-token ( regexp token -- )
|
|
||||||
dup {
|
|
||||||
{ CHAR: ^ [ drop front-anchor-construction ] }
|
|
||||||
{ CHAR: $ [ drop back-anchor-construction ] }
|
|
||||||
{ CHAR: \ [ drop parse-escaped ] }
|
|
||||||
{ CHAR: | [ drop dup concatenation-loop alternation push-stack ] }
|
|
||||||
{ CHAR: ( [ drop [ 1+ ] change-parentheses-count left-parenthesis push-stack ] }
|
|
||||||
{ CHAR: ) [ drop [ 1- ] change-parentheses-count left-parenthesis apply-til-last ] }
|
|
||||||
{ CHAR: * [ drop apply-kleene-closure ] }
|
|
||||||
{ CHAR: + [ drop apply-plus-closure ] }
|
|
||||||
{ CHAR: ? [ drop apply-question-closure ] }
|
|
||||||
{ CHAR: { [ drop parse-brace apply-brace-closure ] }
|
|
||||||
{ CHAR: [ [
|
|
||||||
drop
|
|
||||||
dup left-bracket push-stack
|
|
||||||
[ 1+ ] change-bracket-count parse-character-class
|
|
||||||
] }
|
|
||||||
! { CHAR: } [ drop drop "brace" ] }
|
|
||||||
! { CHAR: ? [ drop ] }
|
|
||||||
{ CHAR: . [ drop dot-construction ] }
|
|
||||||
{ beginning-of-text [ push-stack ] }
|
|
||||||
{ end-of-text [
|
|
||||||
drop {
|
|
||||||
[ check-unbalanced-parentheses ]
|
|
||||||
[ concatenation-loop ]
|
|
||||||
[ beginning-of-text apply-til-last ]
|
|
||||||
[ set-start-state ]
|
|
||||||
} cleave
|
|
||||||
] }
|
|
||||||
[ drop push-single-nfa ]
|
|
||||||
} case ;
|
|
||||||
|
|
||||||
: (parse-raw-regexp) ( regexp -- )
|
|
||||||
get-char [ dupd parse-token next (parse-raw-regexp) ] [ drop ] if* ;
|
|
||||||
|
|
||||||
: parse-raw-regexp ( regexp -- )
|
|
||||||
[ beginning-of-text parse-token ]
|
|
||||||
[
|
|
||||||
dup raw>> dup empty? [
|
|
||||||
2drop
|
|
||||||
] [
|
|
||||||
[ (parse-raw-regexp) ] string-parse
|
|
||||||
] if
|
|
||||||
]
|
|
||||||
[ end-of-text parse-token ] tri ;
|
|
||||||
|
|
||||||
:: find-delta ( states obj table -- keys )
|
|
||||||
obj states [
|
|
||||||
table get-row at
|
|
||||||
[ dup integer? [ 1array ] when unique ] [ H{ } ] if*
|
|
||||||
] with map H{ } clone [ assoc-union ] reduce keys ;
|
|
||||||
|
|
||||||
:: (find-closure) ( states obj assoc table -- keys )
|
|
||||||
[let | size [ assoc assoc-size ] |
|
|
||||||
assoc states unique assoc-union
|
|
||||||
dup assoc-size size > [
|
|
||||||
obj states [
|
|
||||||
table get-row at* [
|
|
||||||
dup integer? [ 1array ] when
|
|
||||||
obj rot table (find-closure)
|
|
||||||
] [
|
|
||||||
drop
|
|
||||||
] if
|
|
||||||
] with each
|
|
||||||
] when ] ;
|
|
||||||
|
|
||||||
: find-closure ( states obj table -- states )
|
|
||||||
>r H{ } r> (find-closure) keys ;
|
|
||||||
|
|
||||||
: find-epsilon-closure ( states table -- states )
|
|
||||||
>r eps H{ } r> (find-closure) keys ;
|
|
||||||
|
|
||||||
: filter-special-transition ( vec -- vec' )
|
|
||||||
[ drop eps = not ] assoc-filter ;
|
|
||||||
|
|
||||||
: initialize-subset-construction ( regexp -- )
|
|
||||||
<vector-table> >>dfa
|
|
||||||
[
|
|
||||||
nfa>> [ start-state>> 1array ] keep
|
|
||||||
find-epsilon-closure 1dlist
|
|
||||||
] [
|
|
||||||
swap >>new-states drop
|
|
||||||
] [
|
|
||||||
[ dfa>> ] [ nfa>> ] bi
|
|
||||||
columns>> filter-special-transition >>columns drop
|
|
||||||
] tri ;
|
|
||||||
|
|
||||||
:: (subset-construction) ( regexp -- )
|
|
||||||
[let* | nfa [ regexp nfa>> ]
|
|
||||||
dfa [ regexp dfa>> ]
|
|
||||||
new-states [ regexp new-states>> ]
|
|
||||||
columns [ dfa columns>> keys ] |
|
|
||||||
|
|
||||||
new-states dlist-empty? [
|
|
||||||
new-states pop-front
|
|
||||||
dup dfa add-row
|
|
||||||
columns [
|
|
||||||
2dup nfa [ find-delta ] [ find-epsilon-closure ] bi
|
|
||||||
dup [ dfa rows>> key? ] [ empty? ] bi or [
|
|
||||||
dup new-states push-back
|
|
||||||
] unless
|
|
||||||
dup empty? [ 3drop ] [ <entry> dfa set-entry ] if
|
|
||||||
] with each
|
|
||||||
regexp (subset-construction)
|
|
||||||
] unless ] ;
|
|
||||||
|
|
||||||
: set-start/final-states ( regexp -- )
|
|
||||||
dup [ nfa>> start-state>> ]
|
|
||||||
[ dfa>> rows>> keys [ member? ] with filter first ] bi
|
|
||||||
>r dup dfa>> r> >>start-state drop
|
|
||||||
|
|
||||||
dup [ nfa>> final-states>> ] [ dfa>> rows>> ] bi
|
|
||||||
[ keys ] bi@
|
|
||||||
[ intersect empty? not ] with filter
|
|
||||||
>r dfa>> r> >>final-states drop ;
|
|
||||||
|
|
||||||
: subset-construction ( regexp -- )
|
|
||||||
[ initialize-subset-construction ]
|
|
||||||
[ (subset-construction) ]
|
|
||||||
[ set-start/final-states ] tri ;
|
|
||||||
|
|
||||||
: <regexp> ( raw -- obj )
|
|
||||||
regexp new
|
|
||||||
swap >>raw
|
|
||||||
0 >>parentheses-count
|
|
||||||
0 >>bracket-count
|
|
||||||
-1 >>state
|
|
||||||
V{ } clone >>stack
|
|
||||||
<vector-table> >>nfa
|
|
||||||
dup [ parse-raw-regexp ] [ subset-construction ] bi ;
|
|
||||||
|
|
||||||
! Literal syntax for regexps
|
|
||||||
: parse-options ( string -- ? )
|
|
||||||
#! Lame
|
|
||||||
{
|
|
||||||
{ "" [ f ] }
|
|
||||||
{ "i" [ t ] }
|
|
||||||
} case ;
|
|
||||||
|
|
||||||
: parse-regexp ( accum end -- accum )
|
|
||||||
lexer get dup skip-blank
|
|
||||||
[ [ index-from dup 1+ swap ] 2keep swapd subseq swap ] change-lexer-column
|
|
||||||
! lexer get dup still-parsing-line?
|
|
||||||
! [ (parse-token) parse-options ] [ drop f ] if
|
|
||||||
<regexp> parsed ;
|
|
||||||
|
|
||||||
: R! CHAR: ! parse-regexp ; parsing
|
|
||||||
: R" CHAR: " parse-regexp ; parsing
|
|
||||||
: R# CHAR: # parse-regexp ; parsing
|
|
||||||
: R' CHAR: ' parse-regexp ; parsing
|
|
||||||
: R( CHAR: ) parse-regexp ; parsing
|
|
||||||
: R/ CHAR: / parse-regexp ; parsing
|
|
||||||
: R@ CHAR: @ parse-regexp ; parsing
|
|
||||||
: R[ CHAR: ] parse-regexp ; parsing
|
|
||||||
: R` CHAR: ` parse-regexp ; parsing
|
|
||||||
: R{ CHAR: } parse-regexp ; parsing
|
|
||||||
: R| CHAR: | parse-regexp ; parsing
|
|
||||||
|
|
||||||
TUPLE: dfa-traverser
|
|
||||||
dfa
|
|
||||||
last-state current-state
|
|
||||||
text
|
|
||||||
start-index current-index
|
|
||||||
matches ;
|
|
||||||
|
|
||||||
: <dfa-traverser> ( text dfa -- match )
|
|
||||||
dfa>>
|
|
||||||
dfa-traverser new
|
|
||||||
swap [ start-state>> >>current-state ] keep
|
|
||||||
>>dfa
|
|
||||||
swap >>text
|
|
||||||
0 >>start-index
|
|
||||||
0 >>current-index
|
|
||||||
V{ } clone >>matches ;
|
|
||||||
|
|
||||||
: final-state? ( dfa-traverser -- ? )
|
|
||||||
[ current-state>> ] [ dfa>> final-states>> ] bi
|
|
||||||
member? ;
|
|
||||||
|
|
||||||
: text-finished? ( dfa-traverser -- ? )
|
|
||||||
[ current-index>> ] [ text>> length ] bi >= ;
|
|
||||||
|
|
||||||
: save-final-state ( dfa-straverser -- )
|
|
||||||
[ current-index>> ] [ matches>> ] bi push ;
|
|
||||||
|
|
||||||
: match-done? ( dfa-traverser -- ? )
|
|
||||||
dup final-state? [
|
|
||||||
dup save-final-state
|
|
||||||
] when text-finished? ;
|
|
||||||
|
|
||||||
: increment-state ( dfa-traverser state -- dfa-traverser )
|
|
||||||
>r [ 1+ ] change-current-index
|
|
||||||
dup current-state>> >>last-state r>
|
|
||||||
>>current-state ;
|
|
||||||
|
|
||||||
: match-transition ( obj hash -- state/f )
|
|
||||||
2dup keys [ callable? ] filter predicates
|
|
||||||
[ swap at nip ] [ at ] if* ;
|
|
||||||
|
|
||||||
: do-match ( dfa-traverser -- dfa-traverser )
|
|
||||||
dup match-done? [
|
|
||||||
dup {
|
|
||||||
[ current-index>> ]
|
|
||||||
[ text>> ]
|
|
||||||
[ current-state>> ]
|
|
||||||
[ dfa>> rows>> ]
|
|
||||||
} cleave
|
|
||||||
at >r nth r> match-transition [
|
|
||||||
increment-state do-match
|
|
||||||
] when*
|
|
||||||
] unless ;
|
|
||||||
|
|
||||||
: return-match ( dfa-traverser -- interval/f )
|
|
||||||
dup matches>> empty? [
|
|
||||||
drop f
|
|
||||||
] [
|
|
||||||
[ start-index>> ] [ matches>> peek ] bi 1 <range>
|
|
||||||
] if ;
|
|
||||||
|
|
||||||
: match ( string regexp -- pair )
|
|
||||||
<dfa-traverser> do-match return-match ;
|
|
||||||
|
|
||||||
: matches? ( string regexp -- ? )
|
|
||||||
dupd match [ [ length ] [ range-length 1- ] bi* = ] [ drop f ] if* ;
|
|
||||||
|
|
||||||
: match-head ( string regexp -- end )
|
|
||||||
match length>> 1- ;
|
|
||||||
|
|
||||||
! character classes
|
|
||||||
! TUPLE: range-class from to ;
|
|
||||||
! TUPLE: or-class left right ;
|
|
||||||
|
|
||||||
! (?:a|b)* <- does not capture
|
|
||||||
! (a|b)*\1 <- group captured
|
|
||||||
! doesn't advance the current position:
|
|
||||||
! (?=abba) positive lookahead matches abbaaa but not abaaa
|
|
||||||
! (?!abba) negative lookahead matches ababa but not abbaa
|
|
||||||
! look behind. "lookaround"
|
|
||||||
|
|
||||||
! : $ ( n -- obj ) groups get nth ;
|
|
||||||
! [
|
|
||||||
! groups bound to scope here
|
|
||||||
! ] [
|
|
||||||
! error or something
|
|
||||||
! ] if-match
|
|
||||||
! match in a string with .*foo.*
|
|
||||||
Loading…
Reference in New Issue