Log a message using a format string if and only if the specified condition predicate evaluates to true. Note that the condition is only evaluated if the log‐level check passes.

Synopsis

Declared in <folly/logging/xlog.h>

#define XLOGF_IF(level, cond, fmt, …​)

Parameters

Name

Description

level

The folly::LogLevel value at which to log.

cond

A predicate; the message is logged only when it is true.

fmt

A folly::format‐style format string for the message.

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