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package subex
import (
"main/walk"
)
type valueFilter interface {
valueFilter(value walk.Value) bool
}
type selectScalarFilter struct {
scalar walk.Scalar
}
func (scalar selectScalarFilter) valueFilter(value walk.Value) bool {
return value == scalar.scalar
}
type anyNumberFilter struct {}
func (_ anyNumberFilter) valueFilter(value walk.Value) bool {
_, isNumber := value.(walk.NumberValue)
return isNumber
}
type anyBoolFilter struct {}
func (_ anyBoolFilter) valueFilter(value walk.Value) bool {
_, isBool := value.(walk.BoolValue)
return isBool
}
type simpleValueFilter struct {}
func (_ simpleValueFilter) valueFilter(value walk.Value) bool {
switch value := value.(type) {
case walk.NullValue:
return true
case walk.BoolValue:
return true
case walk.NumberValue:
return true
case walk.StringValue:
return true
case walk.ArrayValue:
return len(value) == 0
case walk.MapValue:
return len(value) == 0
default:
panic("Invalid value type")
}
}
type anyValueFilter struct {}
func (_ anyValueFilter) valueFilter(value walk.Value) bool {
return true
}
type anyArrayFilter struct {}
func (_ anyArrayFilter) valueFilter(value walk.Value) bool {
_, isArray := value.(walk.ArrayValue)
return isArray
}
type anyMapFilter struct {}
func (_ anyMapFilter) valueFilter(value walk.Value) bool {
_, isMap := value.(walk.MapValue)
return isMap
}
type anyStringFilter struct {}
func (_ anyStringFilter) valueFilter(value walk.Value) bool {
_, isString := value.(walk.StringValue)
return isString
}
type runeFilter interface {
runeFilter(r rune) bool
}
type anyRuneFilter struct {}
func (_ anyRuneFilter) runeFilter(r rune) bool {
return true
}
type selectRuneFilter struct {
r rune
}
func (f selectRuneFilter) runeFilter(r rune) bool {
return f.r == r
}
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