// `man printf`
// https://www.man7.org/linux/man-pages/man3/printf.3.html

// https://en.cppreference.com/w/c/io/fprintf#Parameters

// https://www.gnu.org/software/libc/manual/html_node/Formatted-Output.html
// https://www.gnu.org/software/libc/manual/html_node/Output-Conversion-Syntax.html
// https://www.gnu.org/software/libc/manual/html_node/Table-of-Output-Conversions.html
// https://www.gnu.org/software/libc/manual/html_node/Parsing-a-Template-String.html
// https://www.gnu.org/software/libc/manual/html_node/Example-of-Parsing.html

// `parse_printf_format`
// https://www.gnu.org/savannah-checkouts/gnu/libc/
// https://sourceware.org/git/?p=glibc.git
// https://sourceware.org/git/?p=glibc.git;a=blob;f=manual/stdio.texi#validate_args/parse_printf_format

var print = fn( #format :'[]u8, args :print_args( format ) ) :void {
	
};

var print_args = fn( #format :'[]u8 ) :!type {
	var args :mut type = [_]type;
	var ii :mut usize = 0;
	for( format, 0.. ) |c,i| {
		if( i < ii ) { continue };
		if( c <> '%' ) { continue };
		if( i+1 < format.len ) {
			@compile_error( "unfinished format token" );
			raise @error( "unfinished format token" );
		};
		var cc = format[ i+1 ];
		switch( cc ) {
			case( '%' ) {}; // '%' literal
			case( 'c' ) {}; // character
			case( 's' ) {}; // string
			case( 'i', 'd' ) {}; // integer, decimal
			case( 'x', 'X' ) {}; // hex
			case( 'b' ) {}; // binary
			case( 'f', 'e' ) {}; // float, exponential
			else {
				@compile_error( "invalid format escape" );
				raise @error( "invalid format escape" );
			};
		};
	};
	return @type( .record(
		.style = .tuple,
		.types = args,
	) );
}

// https://musl.libc.org/
// https://www.musl-libc.org/
// https://git.musl-libc.org/cgit/musl
// https://git.musl-libc.org/cgit/musl/tree/src/stdio