SESE0.7
GitHub
LESSON 14

Recoverable errors & try

SE marks fallible work explicitly and can recover, propagate, or create errors.

Concept

  • `fail` creates a runtime error.
  • `try` can handle a block or propagate a fallible expression where supported.

Example

SE
try
    text = read "data.txt"
    say text
else err
    say err.message

make load
    give try read "data.txt"

make check score
    if score < 0
        fail "Invalid score"
    give score