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Scanning Lexical Analysis - Lecture Slides | CMSC 430, Study notes of Computer Science

Material Type: Notes; Class: INTRO TO COMPILERS; Subject: Computer Science; University: University of Maryland; Term: Spring 2009;

Typology: Study notes

Pre 2010

Uploaded on 07/30/2009

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Download Scanning Lexical Analysis - Lecture Slides | CMSC 430 and more Study notes Computer Science in PDF only on Docsity!       CMSC 430 Lecture 2 2                   •        !  ∈   " • #    $      " • %   #& '                                  CMSC 430 Lecture 2 3      • (          → %    → ) *  +   ,- . , /-). , - . , -*. , -. ,-+ . • 0          • #             1   •       2                           3   3  CMSC 430 Lecture 2 4      • 0 1                    • 4           $  • 5    1     '    • %   #&        6 7                    CMSC 430 Lecture 2 5  %  •            -    •   1              →   →      !  →  " #  $ → % & '  ( ) (*  "+ +%+, - . (*++  + -  (*+++!+#+$+&- CMSC 430 Lecture 2 6  %  6     " • 6    '       5  ! →       2        →         /           /    0    0 1  2  "         8    9 &               : CMSC 430 Lecture 2 7 &               ;;;        ;;; &     &        &      '     Σ • ε   &      <ε= • #    Σ-      &   <= • #    &         → >   &     ∪  →    &      →    &    ;        -    -      '   8 ;? ?9 " CMSC 430 Lecture 2 8        1    @    '   3    4 0    5  06    7   6∪  6∪ M = {s | s ∈ L or s ∈ M } 8     06     7   6  6 (*   ∈6   ∈ - 9   06 7   6:  6:(∪0≤i≤∞ L i    ;8 06 7   6% 6%(∪1≤i≤∞ L i      CMSC 430 Lecture 2 9      &      #  !   → > >> A >3>>%>0> A >B 4  → C>>:> A >D #   →      > 4  ; E  ! #   → *>$>ε C> >:>F> A >D4  ;  4   → #   ? 4  ; &  →  #   > 4     *>$>ε 4  ; 0  →  &  - &   E             G CMSC 430 Lecture 2 10 &        &                           3  H                -         3         6  &            G CMSC 430 Lecture 2 11 0       3 # @ 0      &   →  C>>:> A > D C>>:> A > D; •            • & /      &      3   4            -     <   =<   > ?@    =<   > ?@   A0    CMSC 430 Lecture 2 12 4    •    C 2 1       • 4        '       :  - • I 1    C- - :    •  1    C-     •  1           <   =<   > ?@    =<   > ?@   A0    K CMSC 430 Lecture 2 25     0  '       !  6     &     : %    E  F %   4        E  J     1  4  K          • -  - Q  1       •      $1    $  • R                • S         1 G CMSC 430 Lecture 2 26     0 &→ E   7  • %   E      • 0      ε$ '  E  → 4      • %      4  → (   4  • N 7   4  →& E        •  -     • 1       C          4 C  .C 4 C )8D08   CMSC 430 Lecture 2 27 & →E    7 0 R    • E            •  E          • Q      ε  '         <   .C 0 <    ! " .C 0" ε .C 0 " <     ! " # ε ε ε ε <  ε  ! ε .C 0:  ε ε 9  )   +8C8 +?$B CMSC 430 Lecture 2 28      7 0 7    >  ; ? - - 2  :? >  F?  >  ; <   <  " <     " ! #   $< & ε ε ε ε ε ε ε ε   "  !  < # ε ε ε ε CMSC 430 Lecture 2 29      7 0 7 J?   >  ; @   -              ??? <   "    +2       0     <   ε ! # " $ &   B ? ε ε ε ε ε ε ε ε CMSC 430 Lecture 2 30 E  →4       0 E           E    1   • ( '  -              • ε$              ε    ! •    '   C   E  • 1  ε$  C ) ε$  C • 1     C-  ' C-     ∈ Σ-  1  ε$  • #                  A L CMSC 430 Lecture 2 31 E  →4       0 )  E < ← ε, =F<@   <  2 =      @ 0  ∈  0∈ Σ G← ε, = ;= +@@ 0= G ∉ @    G   H )I +J← H 6 K    " 2 D   2  )   E        =  "0   @  L  0    2   +"     ;0 =    @       " .C           " ;D ".C  0      )0  4 C CMSC 430 Lecture 2 32 E  →4       0       $   • (        • N             •     2        •           @    $   • 0      &     → O          • 0  $    →  '          / 6         $   CMSC 430 Lecture 2 33 F< F  ε F! F# " F$ F&  F FBF F? ε ε ε ε ε ε ε ε ,    =  ; = + : @ @ .  C     "  < F < F  + F  + F  + F ! + F $ + F ?      F  + F  + F  + F ! + F $ + F ?   F # + F B + F ? + F  + F ! + F $ F & + F B + F ? + F  + F ! + F $  F # + F B + F ? + F  + F ! + F $      F & + F B + F ? + F  + F ! + F $         E  →4       0       !  ="  @:E ε CMSC 430 Lecture 2 34 E  →4       0  4     >  ; •        E  •        δ  "  <  , ,  ,    ,    ,     <   "  "   " CMSC 430 Lecture 2 35     0 &→E   7  • %   E      • 0      ε$ '  E  →4      • %      4  →(   4  • N 7   4  →&          •  -     • H       C         4 C  .C 4 C )8D08   CMSC 430 Lecture 2 36 4  (  3  %  • 4 '     /'    • &          P   I CMSC 430 Lecture 2 37 4  (  3  %  • 4 '     /'    • &          P        /'      ! • ∀  ∈ Σ-      /'    4  • $              CMSC 430 Lecture 2 38 4  (  3  %  • 4 '     /'    • &          P        /'      ! • ∀  ∈ Σ-      /'    4  • $                   •    ∈          ∈  •     '    4 7   CMSC 430 Lecture 2 39 4  (  3 4       • 5         3  -    • # '   '   -     •             /'  # - C -     !<= 2 <O$= 4 )O-Σ-δ-/C-      8     9 •  /- 2 / ∈ -  δ/- ) / - 2 δ/ - ) / • # / 2 /       -        → /    - /         CMSC 430 Lecture 2 40 4  (  3     ← < - <O$==         ← < =      ∈    ∈ Σ  ←  ∪  -   ←   - !         :     < - :=     6      1" •   ∈ :O •     :     O <=  <O$= • 6   1  →*          • *               >O>   • (     >O >   E   •    '         $   G CMSC 430 Lecture 2 41 4  (  3  -      3         4    <   "  " "     8     "  < * + + -* <-       <   "  6   '                   7  2      ? (  3  4              G 0    CMSC 430 Lecture 2 42   '  &              C >  > : > F > J > K > L > I > M > D     4 C  .C 4 C )8D08   E  ! 8>9   
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