Ticket #127: Clojure scanner by Licenser, yay!

It's still in development. The Scheme scanner, which Lice used as template,
has some very bad code, and both scanner must be cleaned up (see #59).

1 files changed, 203 insertions, 0 deletions

diff --git a/lib/coderay/scanners/clojure.rb b/lib/coderay/scanners/clojure.rb
new file mode 100644
index 0000000..362387a
--- /dev/null
+++ b/lib/coderay/scanners/clojure.rb
@@ -0,0 +1,203 @@
+module CodeRay
+  module Scanners
+    
+    # Clojure scanner by Licenser.
+    class Clojure < Scanner
+      
+      register_for :clojure
+      file_extension 'clj'
+      
+      SPECIAL_FORMS = %w[
+        def if do let quote var fn loop recur throw try catch monitor-enter monitor-exit .
+        new 
+      ]  # :nodoc:
+      
+      CORE_FORMS = %w[
+        + - -> ->> .. / * < <= = == > >= accessor aclone add-classpath add-watch
+        agent agent-error agent-errors aget alength alias all-ns alter alter-meta!
+        alter-var-root amap ancestors and apply areduce array-map aset aset-boolean
+        aset-byte aset-char aset-double aset-float aset-int aset-long aset-short
+        assert assoc assoc! assoc-in associative? atom await await-for bases bean
+        bigdec bigint binding bit-and bit-and-not bit-clear bit-flip bit-not bit-or
+        bit-set bit-shift-left bit-shift-right bit-test bit-xor boolean boolean-array
+        booleans bound-fn bound-fn* bound? butlast byte byte-array bytes case cast char
+        char-array char-escape-string char-name-string char? chars class class?
+        clear-agent-errors clojure-version coll? comment commute comp comparator
+        compare compare-and-set! compile complement concat cond condp conj conj!
+        cons constantly construct-proxy contains? count counted? create-ns
+        create-struct cycle dec decimal? declare definline defmacro defmethod defmulti
+        defn defn- defonce defprotocol defrecord defstruct deftype delay delay?
+        deliver denominator deref derive descendants disj disj! dissoc dissoc!
+        distinct distinct? doall doc dorun doseq dosync dotimes doto double
+        double-array doubles drop drop-last drop-while empty empty? ensure
+        enumeration-seq error-handler error-mode eval even? every? extend
+        extend-protocol extend-type extenders extends? false? ffirst file-seq
+        filter find find-doc find-ns find-var first float float-array float?
+        floats flush fn fn? fnext for force format future future-call future-cancel
+        future-cancelled? future-done? future? gen-class gen-interface gensym get
+        get-in get-method get-proxy-class get-thread-bindings get-validator hash
+        hash-map hash-set identical? identity if-let if-not ifn? import in-ns
+        inc init-proxy instance? int int-array integer? interleave intern
+        interpose into into-array ints io! isa? iterate iterator-seq juxt key
+        keys keyword keyword? last lazy-cat lazy-seq let letfn line-seq list list*
+        list? load load-file load-reader load-string loaded-libs locking long
+        long-array longs loop macroexpand macroexpand-1 make-array make-hierarchy
+        map map? mapcat max max-key memfn memoize merge merge-with meta methods
+        min min-key mod name namespace neg? newline next nfirst nil? nnext not
+        not-any? not-empty not-every? not= ns ns-aliases ns-imports ns-interns
+        ns-map ns-name ns-publics ns-refers ns-resolve ns-unalias ns-unmap nth
+        nthnext num number? numerator object-array odd? or parents partial
+        partition pcalls peek persistent! pmap pop pop! pop-thread-bindings
+        pos? pr pr-str prefer-method prefers print print-namespace-doc
+        print-str printf println println-str prn prn-str promise proxy
+        proxy-mappings proxy-super push-thread-bindings pvalues quot rand
+        rand-int range ratio? rationalize re-find re-groups re-matcher
+        re-matches re-pattern re-seq read read-line read-string reduce ref
+        ref-history-count ref-max-history ref-min-history ref-set refer
+        refer-clojure reify release-pending-sends rem remove remove-all-methods
+        remove-method remove-ns remove-watch repeat repeatedly replace replicate
+        require reset! reset-meta! resolve rest restart-agent resultset-seq
+        reverse reversible? rseq rsubseq satisfies? second select-keys send
+        send-off seq seq? seque sequence sequential? set set-error-handler!
+        set-error-mode! set-validator! set? short short-array shorts
+        shutdown-agents slurp some sort sort-by sorted-map sorted-map-by
+        sorted-set sorted-set-by sorted? special-form-anchor special-symbol?
+        split-at split-with str string? struct struct-map subs subseq subvec
+        supers swap! symbol symbol? sync syntax-symbol-anchor take take-last
+        take-nth take-while test the-ns thread-bound? time to-array to-array-2d
+        trampoline transient tree-seq true? type unchecked-add unchecked-dec
+        unchecked-divide unchecked-inc unchecked-multiply unchecked-negate
+        unchecked-remainder unchecked-subtract underive update-in update-proxy
+        use val vals var-get var-set var? vary-meta vec vector vector-of vector?
+        when when-first when-let when-not while with-bindings with-bindings*
+        with-in-str with-local-vars with-meta with-open with-out-str
+        with-precision xml-seq zero? zipmap 
+      ]  # :nodoc:
+      PREDEFINED_CONSTANTS = %w[
+        true false *1 *2 *3 *agent* *clojure-version* *command-line-args*
+        *compile-files* *compile-path* *e *err* *file* *flush-on-newline*
+        *in* *ns* *out* *print-dup* *print-length* *print-level* *print-meta*
+        *print-readably* *read-eval* *warn-on-reflection*
+      ]  # :nodoc:
+      
+      IDENT_KIND = CaseIgnoringWordList.new(:ident).
+        add(SPECIAL_FORMS, :reserved).
+        add(CORE_FORMS, :reserved).
+        add(PREDEFINED_CONSTANTS, :pre_constant)
+      
+      BASIC_IDENTIFYER = /[a-zA-Z$%*\/_+!?&<>\-=][a-zA-Z0-9§$&*+!\/_?<>\-\#]*/
+      IDENTIFIER = /(?:[@']?(?:#{BASIC_IDENTIFYER}\.)*#{BASIC_IDENTIFYER}(?:\/#{BASIC_IDENTIFYER})?\.?)|\.\.?/
+      SYMBOL = /::?#{IDENTIFIER}/o
+      DIGIT = /\d/
+      DIGIT10 = DIGIT
+      DIGIT16 = /[0-9a-f]/i
+      DIGIT8 = /[0-7]/
+      DIGIT2 = /[01]/
+      RADIX16 = /\#x/i
+      RADIX8 = /\#o/i
+      RADIX2 = /\#b/i
+      RADIX10 = /\#d/i
+      EXACTNESS = /#i|#e/i
+      SIGN = /[\+-]?/
+      EXP_MARK = /[esfdl]/i
+      EXP = /#{EXP_MARK}#{SIGN}#{DIGIT}+/
+      SUFFIX = /#{EXP}?/
+      PREFIX10 = /#{RADIX10}?#{EXACTNESS}?|#{EXACTNESS}?#{RADIX10}?/
+      PREFIX16 = /#{RADIX16}#{EXACTNESS}?|#{EXACTNESS}?#{RADIX16}/
+      PREFIX8 = /#{RADIX8}#{EXACTNESS}?|#{EXACTNESS}?#{RADIX8}/
+      PREFIX2 = /#{RADIX2}#{EXACTNESS}?|#{EXACTNESS}?#{RADIX2}/
+      UINT10 = /#{DIGIT10}+#*/
+      UINT16 = /#{DIGIT16}+#*/
+      UINT8 = /#{DIGIT8}+#*/
+      UINT2 = /#{DIGIT2}+#*/
+      DECIMAL = /#{DIGIT10}+#+\.#*#{SUFFIX}|#{DIGIT10}+\.#{DIGIT10}*#*#{SUFFIX}|\.#{DIGIT10}+#*#{SUFFIX}|#{UINT10}#{EXP}/
+      UREAL10 = /#{UINT10}\/#{UINT10}|#{DECIMAL}|#{UINT10}/
+      UREAL16 = /#{UINT16}\/#{UINT16}|#{UINT16}/
+      UREAL8 = /#{UINT8}\/#{UINT8}|#{UINT8}/
+      UREAL2 = /#{UINT2}\/#{UINT2}|#{UINT2}/
+      REAL10 = /#{SIGN}#{UREAL10}/
+      REAL16 = /#{SIGN}#{UREAL16}/
+      REAL8 = /#{SIGN}#{UREAL8}/
+      REAL2 = /#{SIGN}#{UREAL2}/
+      IMAG10 = /i|#{UREAL10}i/
+      IMAG16 = /i|#{UREAL16}i/
+      IMAG8 = /i|#{UREAL8}i/
+      IMAG2 = /i|#{UREAL2}i/
+      COMPLEX10 = /#{REAL10}@#{REAL10}|#{REAL10}\+#{IMAG10}|#{REAL10}-#{IMAG10}|\+#{IMAG10}|-#{IMAG10}|#{REAL10}/
+      COMPLEX16 = /#{REAL16}@#{REAL16}|#{REAL16}\+#{IMAG16}|#{REAL16}-#{IMAG16}|\+#{IMAG16}|-#{IMAG16}|#{REAL16}/
+      COMPLEX8 = /#{REAL8}@#{REAL8}|#{REAL8}\+#{IMAG8}|#{REAL8}-#{IMAG8}|\+#{IMAG8}|-#{IMAG8}|#{REAL8}/
+      COMPLEX2 = /#{REAL2}@#{REAL2}|#{REAL2}\+#{IMAG2}|#{REAL2}-#{IMAG2}|\+#{IMAG2}|-#{IMAG2}|#{REAL2}/
+      NUM10 = /#{PREFIX10}?#{COMPLEX10}/
+      NUM16 = /#{PREFIX16}#{COMPLEX16}/
+      NUM8 = /#{PREFIX8}#{COMPLEX8}/
+      NUM2 = /#{PREFIX2}#{COMPLEX2}/
+      NUM = /#{NUM10}|#{NUM16}|#{NUM8}|#{NUM2}/
+      
+    protected
+      
+      def scan_tokens encoder, options
+        
+        state = :initial
+        ident_kind = IDENT_KIND
+        
+        until eos?
+          
+          case state
+          when :initial
+            if match = scan(/ \s+ | \\\n | , /x)
+              encoder.text_token match, :space
+            elsif match = scan(/['`\(\[\)\]\{\}]|\#[({]|~@?|@/)
+              encoder.text_token match, :operator  # FIXME: was :operator_fat
+            elsif match = scan(/;.*/)
+              encoder.text_token match, :comment
+            elsif match = scan(/\#\\(?:newline|space|.?)/)
+              encoder.text_token match, :char
+            elsif match = scan(/\#[ft]/)
+              encoder.text_token match, :pre_constant
+            elsif match = scan(/#{IDENTIFIER}/o)
+              encoder.text_token match, ident_kind[matched]
+            elsif match = scan(/#{SYMBOL}/o)
+              encoder.text_token match, :symbol
+            elsif match = scan(/\./)
+              encoder.text_token match, :operator
+            elsif match = scan(/ \# \^ #{IDENTIFIER} /ox)
+              encoder.text_token match, :type
+            elsif match = scan(/ (\#)? " /x)
+              state = self[1] ? :regexp : :string
+              encoder.begin_group state
+              encoder.text_token match, :delimiter
+            elsif match = scan(/#{NUM}/o) and not matched.empty?
+              encoder.text_token match, match[/[.e]/i] ? :float : :integer
+            else
+              encoder.text_token getch, :error
+            end
+            
+          when :string, :regexp
+            if match = scan(/[^"\\]+|\\.?/)
+              encoder.text_token match, :content
+            elsif match = scan(/"/)
+              encoder.text_token match, :delimiter
+              encoder.end_group state
+              state = :initial
+            else
+              raise_inspect "else case \" reached; %p not handled." % peek(1),
+                encoder, state
+            end
+            
+          else
+            raise 'else case reached'
+            
+          end
+          
+        end
+        
+        if [:string, :regexp].include? state
+          encoder.end_group state
+        end
+        
+        encoder
+        
+      end
+    end
+  end
+end
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