const (
	_ = 1_000 // ERROR "underscore in numeric literal requires go1.13 or later \(-lang was set to go1.12; check go.mod\)|requires go1.13"
	_ = 0b111 // ERROR "binary literal requires go1.13 or later"
	_ = 0o567 // ERROR "0o/0O-style octal literal requires go1.13 or later"
	_ = 0xabc // ok
	_ = 0x0p1 // ERROR "hexadecimal floating-point literal requires go1.13 or later"

	_ = 0b111 // ERROR "binary"
	_ = 0o567 // ERROR "octal"
	_ = 0xabc // ok

package p

// numeric literals
const (
	_ = 1_000 // ERROR "underscore in numeric literal requires go1.13 or later"
	_ = 0b111 // ERROR "binary literal requires go1.13 or later"
	_ = 0o567 // ERROR "0o/0O-style octal literal requires go1.13 or later"
	_ = 0xabc // ok
	_ = 0x0p1 // ERROR "hexadecimal floating-point literal requires go1.13 or later"

	_ = 0b111 // ERROR "binary"
	_ = 0o567 // ERROR "octal"
	_ = 0xabc // ok

//
// The string may begin with a leading sign: "+" or "-".
//
// If the base argument is 0, the true base is implied by the string's
// prefix following the sign (if present): 2 for "0b", 8 for "0" or "0o",
// 16 for "0x", and 10 otherwise. Also, for argument base 0 only,
// underscore characters are permitted as defined by the Go syntax for
// [integer literals].
//
// The bitSize argument specifies the integer type