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package walk
import (
"fmt"
"strings"
)
type Value interface {
value()
Debug() string
}
type NullValue struct{}
func (_ NullValue) value() {}
func (_ NullValue) Debug() string {
return "null"
}
type BoolValue bool
func (_ BoolValue) value() {}
func (b BoolValue) Debug() string {
if b {
return "true"
}
return "false"
}
type NumberValue float64
func (_ NumberValue) value() {}
func (n NumberValue) Debug() string {
return fmt.Sprintf("%v", float64(n))
}
type RuneValue rune
func (_ RuneValue) value() {}
func (r RuneValue) Debug() string {
return string(r)
}
type StringValue string
func (_ StringValue) value() {}
func (s StringValue) Debug() string {
return fmt.Sprintf("%q", string(s))
}
type ArrayElement struct {
Index int
Value Value
}
type ArrayValue []ArrayElement
func (_ ArrayValue) value() {}
func (array ArrayValue) Debug() string {
builder := strings.Builder{}
builder.WriteRune('[')
var sep string
for _, element := range array {
builder.WriteString(sep)
builder.WriteString(fmt.Sprintf("%v", element.Index))
builder.WriteString(": ")
builder.WriteString(element.Value.Debug())
sep = ", "
}
builder.WriteRune(']')
return builder.String()
}
type MapElement struct {
Key string
Value Value
}
type MapValue []MapElement
func (_ MapValue) value() {}
func (m MapValue) Debug() string {
builder := strings.Builder{}
builder.WriteRune('{')
var sep string
for _, element := range m {
builder.WriteString(sep)
builder.WriteString(fmt.Sprintf("%q", element.Key))
builder.WriteString(": ")
builder.WriteString(element.Value.Debug())
sep = ", "
}
builder.WriteRune('}')
return builder.String()
}
type WalkItem struct {
Value Value
Start, PrevStart, End, NextEnd bool
}
func (item WalkItem) Debug() string {
builder := strings.Builder{}
if item.Start {
builder.WriteRune('a')
}
if item.PrevStart {
builder.WriteRune('A')
}
if item.NextEnd {
builder.WriteRune('Z')
}
if item.End {
builder.WriteRune('z')
}
builder.WriteString(item.Value.Debug())
return builder.String()
}
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