transform

var (
	ErrInvalidSource                = errors.New("Invalid source")
	ErrMultipleSourceNodesForObject = errors.New("Multiple source nodes specified for an object")
	ErrSourceMustBeString           = errors.New("source term value must be a string")
)

var ErrInvalidConditional = errors.New("Invalid conditional")

var ErrInvalidVariables = errors.New("Invalid vars section")

var ErrJoinFailure = errors.New("Join failure")

var ReshapeTerms = struct {
	// If given, the If term specifies a predicate that should be true to reshape the node
	If string
	// Vars defines a list of expressions that pull values from the
	// source graph and define them as variables
	Vars string
	// Source specifies the source value to be used to generate the target value
	Source string
	// IfEmpty determines whether to reshape the node even if it has no value
	IfEmpty string
	// JoinMethod determines how to join multiple values to generate a single value
	JoinMethod string
	// JoinDelimiter specifies the join delimiter if there are multiple values to be combined
	JoinDelimiter string
}{
	If: ls.NewTerm(RS+"if", false, false, ls.OverrideComposition, struct {
		ifSemantics
	}{}),
	Vars: ls.NewTerm(RS+"vars", false, true, ls.OverrideComposition, struct {
		varsSemantics
	}{}),
	Source: ls.NewTerm(RS+"source", false, false, ls.OverrideComposition, struct {
		sourceSemantics
	}{}),
	IfEmpty:       ls.NewTerm(RS+"ifEmpty", false, false, ls.OverrideComposition, nil),
	JoinMethod:    ls.NewTerm(RS+"joinMethod", false, false, ls.OverrideComposition, nil),
	JoinDelimiter: ls.NewTerm(RS+"joinDelimiter", false, false, ls.OverrideComposition, nil),
}