v/vlib/v/tests/string_interpolation_function_test.v

fn show(a string) string {
	return a
}

fn test_function_interpolation() {
	f := fn()(string, bool) {return 'aaa', true}
	println(f)
	assert '$f' == 'fn () (string, bool)'

	println(show)
	assert '$show' == 'fn (string) string'
}

struct Info {
	aa fn()string
	bb int
}

fn test_function_interpolation_in_struct() {
	a := Info{
		aa: fn()string {return 'aaa'}
		bb: 22
	}
	println(a)
	assert '$a'.contains(': fn () string')
}

fn test_function_interpolation_in_array() {
	f := [fn()string{return 'aaa'}, fn()string{return 'bbb'}]
	println(f)
	assert '$f' == '[fn () string, fn () string]'
}

fn test_function_interpolation_in_map() {
	m := {'aaa': fn()string{return 'aaa'}, 'bbb': fn()string{return 'bbb'}}
	println(m)
	assert '$m'.contains(': fn () string')
}