import os

fn main() {
	println('Hello world, args: ${os.args}')
	i := 123
	a := 'abc'
	b := 'xyz'
	width := 8
	precision := 3
	e := 'a: ${a} b: ${b} i: ${i}'
	d := 'a: ${a:5s} b: ${b:-5s} i: ${i:20d}'
	g := '${a:(width)} ${i:0(width)d} ${f64(i):(width).(precision)f}'
	f := 'a byte string'.bytes()
	println('a: ${a} ${b} xxx')
	eprintln('e: ${e}')
	eprintln('g: ${g}')
	_ = ' ${foo.method(bar).str()} '
	println('(${some_struct.@type}, ${some_struct.y})')
	_ := 'CastExpr ${int(d.e).str()}'
	println('${f[0..4].bytestr()}')
	_ := '${generic_fn[int]()}'
	_ := '${foo.generic_method[int]()}'
}