lisp #

#으로 시작하는 매크로인데
공부하면서 접하게 되는건 function 을 대체하는 #' 정도?

2012/12/05 - [Programming/lisp] - lisp - #' 와 '

In addition, the first character may not be '#' (non-terminating macro character), nor may the symbol have identical syntax with a numeric literal.  Uppercase and lowercase characters are not distinguished within symbol names because, by default, lowercase characters are mapped to uppercase on input.

Standard Non-Terminating Macro Characters ----------------------------------------- # [링크 : http://psg.com/~dlamkins/sl/chapter03-11.html]

#   This is a dispatching macro character. It reads an optional digit string and then one more character, and uses that character to select a function to run as a macro-character function. The # character also happens to be a non-terminating macro character. This is completely independent of the fact that it is a dispatching macro character; it is a coincidence that the only standard dispatching macro character in Common Lisp is also the only standard non-terminating macro character. See the next section for predefined # macro-character constructions. [링크 : http://www.cs.cmu.edu/Groups/AI/html/cltl/clm/node190.html]

Table 22-4: Standard # Macro Character Syntax   #!  undefined *                #<backspace>  signals error  #"  undefined                  #<tab>        signals error  ##  reference to #= label      #<newline>    signals error  #$  undefined                  #<linefeed>   signals error  #%  undefined                  #<page>       signals error  #&  undefined                  #<return>     signals error  #'  function abbreviation      #<space>      signals error  #(  simple vector              #+      read-time conditional  #)  signals error              #-      read-time conditional  #*  bit-vector                 #.      read-time evaluation  #,  load-time evaluation       #/      undefined  #0  used for infix arguments   #A, #a  array  #1  used for infix arguments   #B, #b  binary rational  #2  used for infix arguments   #C, #c  complex number  #3  used for infix arguments   #D, #d  undefined  #4  used for infix arguments   #E, #e  undefined  #5  used for infix arguments   #F, #f  undefined  #6  used for infix arguments   #G, #g  undefined  #7  used for infix arguments   #H, #h  undefined  #8  used for infix arguments   #I, #i  undefined  #9  used for infix arguments   #J, #j  undefined  #:  uninterned symbol          #K, #k  undefined  #;  undefined                  #L, #l  undefined  #<  signals error              #M, #m  undefined  #=  label following object     #N, #n  undefined  #>  undefined                  #O, #o  octal rational  #?  undefined *                #P, #p  pathname  #@  undefined                  #Q, #q  undefined  #[  undefined *                #R, #r  radix-n rational  #\  character object           #S, #s  structure  #]  undefined *                #T, #t  undefined  #^  undefined                  #U, #u  undefined  #_  undefined                  #V, #v  undefined  #`  undefined                  #W, #w  undefined  #{  undefined *                #X, #x  hexadecimal rational  #|  balanced comment           #Y, #y  undefined  #}  undefined *                #Z, #z  undefined     #~  undefined                  #<rubout> undefined   [링크 : http://www.cs.cmu.edu/Groups/AI/html/cltl/clm/node191.html]