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Fuzion • Library Modules • base • io • file • use
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use

io.file.use

use
(R 
type
, file_name String, m io.file.this.mode.val, code Function (outcome R))
 => 
outcome R
[src]
this opens a file with the given mode.
on success it instates effects:

file.this.open,
(io.buffered file.this.file_mutate).reader and
(io.buffered file.this.file_mutate).writer.

These can then be used in `code()`.

usage example:

my_file : io.file is
_ := my_file.use file_name mode.read ()->
say (io.buffered my_file.file_mutate).read_lines
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What are effects?

Type Parameters

R
:
Any
[src]
0.094dev (2025-07-10 15:41:47 GIT hash eafa42ae743de61b62f958948d7abb5fada7756f built by fridi@fzen)