diff options
Diffstat (limited to 'txr.1')
| -rw-r--r-- | txr.1 | 12 |
1 files changed, 7 insertions, 5 deletions
@@ -5498,7 +5498,7 @@ Examples: Syntax: ({for | for*} ({<sym> | (<sym> <init-form>)}*) - (<test-form> <result-form>*) + ([<test-form> <result-form>*]) (<inc-form>*) <body-form>*) @@ -5510,6 +5510,7 @@ The first argument is a list of variables with optional initializers, exactly the same as in the let and let* operators. Furthermore, the difference between for and for* is like that between let and let* with regard to this list of variables. + The for operators execute these steps: 1. Establish bindings for the specified variables similarly to let @@ -5519,10 +5520,11 @@ and let*. The variable bindings are visible over the <test-form>, each 2. Establish an anonymous block over the remaining forms, allowing the return operator to be used to terminate the loop. -3. Evaluate <test-form>. If <test-form> yields nil, then each -<result-form> is evaluated, and the vale of the last of these forms -is is the result value of the for loop. If there are no such forms -then the return value is nil. +3. Evaluate <test-form>. If <test-form> yields nil, then the loop +terminates. Each <result-form> is evaluated, and the value of the last of these +forms is is the result value of the for loop. If there are no <result-form>-s +then the result value is nil. If the <test-form> is omitted, then the +the test is taken to be true, and the loop does not terminate. 4. Otherwise, if <test-form> yields non-nil, then each <body-form> is evaluated in turn. Then, each <inc-form> is evaluated in turn |