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value_set_eclosure.go
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value_set_eclosure.go
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package rel
import (
"reflect"
"github.com/arr-ai/wbnf/parser"
)
// ExprClosure represents the closure of an expression over a scope.
type ExprClosure struct {
scope Scope
e Expr
}
// NewExprClosure returns a new ExprClosure.
func NewExprClosure(scope Scope, e Expr) Value {
return ExprClosure{scope: scope, e: e}
}
// Hash computes a hash for a ExprClosure.
func (c ExprClosure) Hash(seed uintptr) uintptr {
panic("not implemented")
// TODO: Is this enough?
// return c.e.Hash(seed)
}
// Equal tests two Values for equality. Any other type returns false.
func (c ExprClosure) Equal(i interface{}) bool {
if d, ok := i.(ExprClosure); ok {
return c.EqualExprClosure(d)
}
return false
}
// Equal tests two Values for equality. Any other type returns false.
func (c ExprClosure) EqualExprClosure(d ExprClosure) bool {
panic("not implemented")
// return c.f.EqualFunction(d.f)
}
// String returns a string representation of the expression.
func (c ExprClosure) String() string {
return "◖" + c.e.String() + "◗"
}
// Eval returns the Value
func (c ExprClosure) Eval(_ Scope) (Value, error) {
return c.e.Eval(c.scope)
}
// Source returns a scanner locating the ExprClosure's source code.
func (c ExprClosure) Source() parser.Scanner {
return *parser.NewScanner("")
}
var eclosureKind = registerKind(206, reflect.TypeOf(ExprClosure{}))
// Kind returns a number that is unique for each major kind of Value.
func (c ExprClosure) Kind() int {
return eclosureKind
}
// Bool returns true iff the tuple has attributes.
func (c ExprClosure) IsTrue() bool {
return true
}
// Less returns true iff g is not a number or f.number < g.number.
func (c ExprClosure) Less(d Value) bool {
if c.Kind() != d.Kind() {
return c.Kind() < d.Kind()
}
return c.String() < d.String()
}
// Negate returns {(negateTag): f}.
func (c ExprClosure) Negate() Value {
return NewTuple(NewAttr(negateTag, c))
}
// Export exports a ExprClosure.
func (c ExprClosure) Export() interface{} {
return func(v Value) Value {
result, err := SetCall(c, v)
if err != nil {
panic(err)
}
return result
}
}
func (ExprClosure) Count() int {
return 1
}
func (ExprClosure) Has(Value) bool {
panic("unimplemented")
}
func (ExprClosure) Enumerator() ValueEnumerator {
panic("unimplemented")
}
func (c ExprClosure) With(Value) Set {
panic("unimplemented")
}
func (ExprClosure) Without(Value) Set {
panic("unimplemented")
}
func (ExprClosure) Map(func(Value) Value) Set {
panic("unimplemented")
}
func (ExprClosure) Where(p func(v Value) (bool, error)) (Set, error) {
panic("unimplemented")
}
func (c ExprClosure) CallAll(arg Value) (Set, error) {
//TODO: CallAll
panic("unimplemented")
}
func (ExprClosure) ArrayEnumerator() (OffsetValueEnumerator, bool) {
panic("unimplemented")
}