mwx::mwx_format

printf format input

This is a helper class that writes format specifiers for the << operator of mwx::stream.

Within the library, it is aliased as Using format=mwx::mwx_format;.

Serial << format("formatted print: %.2f", (double)3123 / 100.) << mwx::crlf;

// formatted print: 31.23[newline]

The maximum number of arguments that can be registered in the variable argument list is 8. If parameters include 64-bit types such as double or uint64_t, the number of arguments is limited. Exceeding this limit will result in a compile-time error due to static_assert.

Store the argument list received by the constructor into internal class variables using parameter pack expansion
When operator << is called, call fctprintf() and write data to the stream

Constructor

format(const char *fmt, ...)

The constructor saves the format pointer and parameters. The following << operator call interprets the format and performs output processing.

Parameter	Description
`fmt`	Format string. See TWESDK/TWENET/current/src/printf/README.md
`...`	Parameters corresponding to the format string. ※ The maximum number is 4; using 5 or more parameters will cause a compile error. ※ Consistency with the format is not checked, so unsafe for inconsistent input.

fmt must remain accessible until this object is destroyed.