// A bare `{...}` in map key or value position takes its type from the map:
// map[string]map[string]string{"en": {"k": "v"}} must hold a real inner map,
// map[string][]string{"a": {"x", "y"}} a two-element slice, and a struct value
// a built struct. Stage4 built none of them: buildExpr on an untyped
// composite literal returned nil, the entry was dropped without a word, and
// the program read an empty map. Map-index field selection (`m[k].Field`) hit
// the same hole from the other side - the field select returned nil and the
// enclosing call failed arg-count checking.
package main

import "fmt"

type pt struct {
	x string
	y string
}

func main() {
	nested := map[string]map[string]string{
		"en": {"login": "EN LOGIN"},
		"ja": {"login": "JA LOGIN"},
	}
	slices := map[string][]string{"a": {"one", "two"}}
	structs := map[string]pt{"a": {x: "one", y: "two"}}
	arrays := map[string][2]string{"a": {"first", "second"}}
	ptrs := map[string]*pt{"a": &pt{x: "five", y: "six"}}

	fmt.Println("nested en = " | nested["en"]["login"])
	fmt.Println("nested ja = " | nested["ja"]["login"])
	fmt.Println("slice = " | slices["a"][0] | "," | slices["a"][1])
	fmt.Println("struct = " | structs["a"].x | "," | structs["a"].y)
	fmt.Println("array = " | arrays["a"][0] | "," | arrays["a"][1])
	fmt.Println("ptr = " | ptrs["a"].x | "," | ptrs["a"].y)
}