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Caught Error Block (catch)

Handles the exception code raised by try or trypipe

Description

catch is designed to be used in conjunction with try and trypipe as it handles the exceptions raised by the aforementioned.

Usage

[ try | trypipe ] { code-block } -> <stdout>

catch { code-block } -> <stdout>

!catch { code-block } -> <stdout>

Examples

try {
    out "Hello, World!" -> grep: "non-existent string"
    out "This command will be ignored"
}

catch {
    out "An error was caught"
}

!catch {
    out "No errors were raised"
}

Detail

catch can be used with a bang prefix to check for a lack of errors.

catch forwards on the stdin and exit number of the calling function.

Synonyms

• catch
• !catch

See Also

• Disable Error Handling In Block (unsafe): Execute a block of code, always returning a zero exit number
• Function / Module Defaults (runmode): Alter the scheduler’s behaviour at higher scoping level
• If Conditional (if): Conditional statement to execute different blocks of code depending on the result of the condition
• Pipe Fail (trypipe): Checks for non-zero exits of each function in a pipeline
• Schedulers: Overview of the different schedulers (or ‘run modes’) in Murex
• Stderr Checking In Pipes (trypipeerr): Checks state of each function in a pipeline and exits block on error
• Stderr Checking In TTY (tryerr): Handles errors inside a block of code
• Switch Conditional (switch): Blocks of cascading conditionals
• Try Block (try): Handles non-zero exits inside a block of code

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This document was generated from builtins/core/structs/try_doc.yaml.