lib.debug.traceIf

Conditionally trace the supplied message, based on a predicate.

Inputs

pred

Predicate to check

msg

Message that should be traced

x

Value to return

Type

traceIf :: bool -> string -> a -> a

Examples

traceIf true "hello" 3
trace: hello
=> 3

Noogle detected

• lib.traceIf

traceIf =
    pred: msg: x:
    if pred then trace msg x else x;