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[smlnj] Annotation of /sml/trunk/src/MLRISC/emit/asmStream.sml
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Annotation of /sml/trunk/src/MLRISC/emit/asmStream.sml

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1 : monnier 245 (* asmStream.sml
2 :     *
3 :     * COPYRIGHT (c) 1996 Bell Laboratories.
4 :     *
5 :     *)
6 :    
7 :     (* AsmStream - this structure is available to all codegenerators.
8 :     * Typically asmOutStream is rebound to a file.
9 :     *)
10 : monnier 469
11 : monnier 245 signature ASM_STREAM = sig
12 :     val asmOutStream : TextIO.outstream ref
13 :     val withStream : TextIO.outstream -> ('a -> 'b) -> 'a -> 'b
14 :     end
15 :    
16 : monnier 469 structure AsmStream : ASM_STREAM = struct
17 : monnier 245 val asmOutStream = ref TextIO.stdOut
18 :     fun withStream stream body x = let
19 :     val s = !asmOutStream
20 :     val _ = asmOutStream := stream
21 :     in
22 :     (body x before asmOutStream := s)
23 :     handle e => (asmOutStream := s; raise e)
24 :     end
25 :     end
26 :    
27 :    
28 :    

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