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5.4   Logging

Logging support is built into the language. Log groups are defined with the global declaration loggroup. For example:

loggroup config;
loggroup request;
loggroup response;

Log outputs are made with the log statement as follows:

log type, level, groups, string, [value]

where the parameters mean:

type

One of the strings:

• "error"
• "info"
• "undefined"
• "spec_violation"
• "target_error"
• "unimplemented"

level

An integer from 1 through 4, determining the verbosity level at which the message will be logged.

groups

One or several log groups, as defined by the loggroup statement, combined with the bitwise or operator "|". If no log groups are defined, the integer 1 makes sense to use.

string, values

A formatting string, as for the C function printf(), optionally followed by a comma separated list of values to be printed.

A small example:

loggroup example;

method m(uint32 val) {
        log "info", 4, example : "val=%u", val;
}

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