typesutil

const (
	Invalid  OperandMode = iota // operand is invalid
	NoValue                     // operand represents no value (result of a function call w/o result)
	Builtin                     // operand is a built-in function
	TypExpr                     // operand is a type
	Constant                    // operand is a constant; the operand's typ is a Basic type
	Variable                    // operand is an addressable variable
	MapIndex                    // operand is a map index expression (acts like a variable on lhs, commaok on rhs of an assignment)
	Value                       // operand is a computed value
	CommaOK                     // like value, but operand may be used in a comma,ok expression
	CommaErr                    // like commaok, but second value is error, not boolean
	CgoFunc                     // operand is a cgo function
)