bob gailer wrote:
Rob van der Heij wrote:
On Jan 30, 2008 7:57 AM, Bob Gailer <[EMAIL PROTECTED]> wrote:
How could a secondary input stream be defined but not connected?
Both input and output are defined by the same means.
| x: locate ,none, | insert ,no: , | cons
\ x: | insert ,yes: , | cons
The secondary input of locate is defined but not connected. This
\ hole | x: | insert ,yes: , | cons
is flagged by the scanner as an error.
OK. I had assumed that a label reference at the start of a
specification only created an output stream. It appears from what you
say that a label reference always creates both input and output
streams. Is this behavior documented?
Never mind - p 76 in Author's Edition. "The first reference to the label
creates the secondary input and output stream; the next one creates the
tertiary streams; and so on."
--
Bob Gailer
919-636-4239 Chapel Hill, NC
