Method When

case.go:119–123

When adds "WHEN ... THEN ..." part to CASE construct

(when interface{}, then interface{})

// When adds "WHEN ... THEN ..." part to CASE construct
func (b CaseBuilder) When(when interface{}, then interface{}) CaseBuilder {
	// TODO: performance hint: replace slice of WhenPart with just slice of parts
	// where even indices of the slice belong to "when"s and odd indices belong to "then"s
	return builder.Append(b, "WhenParts", newWhenPart(when, then)).(CaseBuilder)
}

// What sets optional "ELSE ..." part for CASE construct
func (b CaseBuilder) Else(expr interface{}) CaseBuilder {