https://github.com/jrincayc/ucblogo-code
Revision ad2aafdb76721bf7ee061407f6a92e005841f163 authored by Joshua Cogliati on 28 June 2022, 01:19:29 UTC, committed by GitHub on 28 June 2022, 01:19:29 UTC
ISSUE-134: Fixed issue with LOADPICT if it's called before other turtle commands
Tip revision: ad2aafdb76721bf7ee061407f6a92e005841f163 authored by Joshua Cogliati on 28 June 2022, 01:19:29 UTC
Merge pull request #135 from dmalec/ISSUE-134
Merge pull request #135 from dmalec/ISSUE-134
Tip revision: ad2aafd
catch
CATCH tag instructionlist
command or operation. Runs its second input. Outputs if that
instructionlist outputs. If, while running the instructionlist,
a THROW instruction is executed with a tag equal to the first
input (case-insensitive comparison), then the running of the
instructionlist is terminated immediately. In this case the CATCH
outputs if a value input is given to THROW. The tag must be a word.
If the tag is the word ERROR, then any error condition that arises
during the running of the instructionlist has the effect of THROW
"ERROR instead of printing an error message and returning to
toplevel. The CATCH does not output if an error is caught. Also,
during the running of the instructionlist, the variable ERRACT is
temporarily unbound. (If there is an error while ERRACT has a
value, that value is taken as an instructionlist to be run after
printing the error message. Typically the value of ERRACT, if any,
is the list [PAUSE].)
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