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listexpansion.go
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/
listexpansion.go
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package dynaml
import "fmt"
type ListExpansion interface {
Expression
IsListExpansion() bool
}
type ListExpansionExpr struct {
Expression
}
func (e ListExpansionExpr) String() string {
return fmt.Sprintf("%s...", e.Expression)
}
func (e ListExpansionExpr) Evaluate(binding Binding, locally bool) (interface{}, EvaluationInfo, bool) {
return e.Expression.Evaluate(binding, locally)
}
func (e ListExpansionExpr) IsListExpansion() bool {
return true
}
func IsListExpansion(e Expression) bool {
va, ok := e.(ListExpansion)
return ok && va.IsListExpansion()
}
func KeepArgWrapper(e Expression, orig Expression) Expression {
if va, ok := orig.(ListExpansion); ok && va.IsListExpansion() {
if _, ok := e.(ListExpansion); !ok {
return ListExpansionExpr{e}
}
}
if na, ok := orig.(NameArgument); ok {
return NameArgument{na.Name, e}
}
return e
}