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| operator | is open | ||||
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| Summary |
Boolean
Returns true if the stream has been opened or reopened and not yet closed, and false otherwise. Replacing |
stream? stream-name indexer? (is | isnt) open
You can use is open to determine if a stream variable is open. A stream is open if it has been opened or reopened, but is not yet closed.
The following code opens a stream if it is not already open:
open my-stream as buffer unless my-stream is open
The following code shows two OmniMark stream state tests that use isnt open:
document-start
local stream s
...
open s as buffer when s isnt open
...
close s when s isnt closed
...
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Related Syntax open reopen |
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