diff options
Diffstat (limited to 'txr.1')
| -rw-r--r-- | txr.1 | 18 |
1 files changed, 17 insertions, 1 deletions
@@ -15728,10 +15728,11 @@ argument is accessed. By that time, the variable is initialized and holds the lazy cons itself, which creates the circular reference, and a circular list. -.coNP Functions @ generate and @ giterate +.coNP Functions @ generate @, giterate and @ ginterate .synb .mets (generate < while-fun << gen-fun ) .mets (giterate < while-fun < gen-fun <> [ value ]) +.mets (ginterate < while-fun < gen-fun <> [ value ]) .syne .desc The @@ -15815,10 +15816,25 @@ like this: (lambda () (prog1 v (set v [g v]))))) .cble +The +.code ginterate +function is a variant of +.code giterate +which includes the test-failing item in the generated sequence. +That is to say +.code ginterate +generates the next value and adds it to the lazy list. +The value is then tested using +.metn while-fun . +If that function returns +.codn nil , +then the list is terminated, and no more items are produced. + .TP* Example: .cblk (giterate (op > 5) (op + 1) 0) -> (0 1 2 3 4) + (ginterate (op > 5) (op + 1) 0) -> (0 1 2 3 4 5) .cble .coNP Function @ repeat |