DPL Enum

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• Published May 18, 2022

ENUM { string=integer , … }

Enum constructor allows matching for a set of predefined strings and converts them into respectively assigned integer values. The strings and respective integer values are declared as series of key-value pairs, separated by commas and enclosed in curly brackets.

Example 23.

Suppose we have data with username, login result and comment fields:

Alice;success;all good
Bob;Wrong password;attempts left 2
Oscar;tech error;
Mallory;;doodaloo

Pattern. Line 3 maps login result strings (case-insensitively) to integer values:

LD:username ';'
ENUM{''=-3, 'success'=0, 'Wrong password'=1, 'tech error'=2}(cis=true):result ';'
LD*:comment
EOL;

Result: