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REBOL [ Title: "#define dialected function" File: %define-dialect.r Author: "Gregg Irwin" Version: 0.0.1 Date: 23-sep-2003 Purpose: { Make it easier to map C #define statements. Eliminates the need to manually call datatype conversion functions for each item. } Comment: { The block you pass to the function is a dialect. In the dialect you can specify word-value pairs and functions used to map different types of values as they are processed. MAP is used to tell the processor what function to call when it encounters a particular datatype value. The function specified should take a single value. 'map datatype function-name ; call to-integer when a binary! value is found. [map binary! to-integer] Other than that, just specify a word followed by a value. The resulting block will contain set-word! values for each word, followed by its value - which may have been converted by a function that was mapped to its original datatype. } Example: { do define [ map binary! to-integer map issue! to-integer my-name "Gregg" mapped-binary #{00000001} mapped-issue #000fffff ] print [my-name mapped-binary mapped-issue] } library: [ level: 'intermediate platform: 'all type: [function] domain: [dialects parse external-library] tested-under: [view on W2K] support: none license: none see-also: none ] ] define: func [ block [any-block!] /local type fn word val result map ] [ result: make block length? block map: copy [] either parse block [ some [ 'map set type word! set fn word! ( type: do type either word: find/skip map type 2 [ change next word get fn ][ append map reduce [type get fn] ] ) | set word any-word! set val any-type! ( append result reduce [ to set-word! word either fn: select map type? val [fn val][val] ] ) ] to end ] [result][none] ] comment [ ; test examples print mold defs: define [ map binary! to-integer map issue! to-integer PFD_DOUBLEBUFFER #{00000001} PFD_STEREO #{00000002} PFD_DRAW_TO_WINDOW #00000004 GL_ALL_ATTRIB_BITS #000fffff ] do defs print [ PFD_DOUBLEBUFFER PFD_STEREO PFD_DRAW_TO_WINDOW GL_ALL_ATTRIB_BITS ] halt ]
halt ;; to terminate script if DO'ne from webpage