Refactor Atom and Value code out of walk.go and into separate files

1 files changed, 78 insertions, 0 deletions

diff --git a/walk/value.go b/walk/value.go
new file mode 100644
index 0000000..2e2c3c9
--- /dev/null
+++ b/walk/value.go
@@ -0,0 +1,78 @@
+package walk
+
+import (
+	"fmt"
+)
+
+type ValueTerminal int
+const (
+	ArrayBegin ValueTerminal = iota
+	ArrayEnd
+	MapBegin
+	MapEnd
+)
+func (value ValueTerminal) Atomise(in []Atom) []Atom {
+	return append(in, NewAtomTerminal(value))
+}
+func (value ValueTerminal) String() string {
+	switch value {
+		case ArrayBegin:
+			return "["
+		case ArrayEnd:
+			return "]"
+		case MapBegin:
+			return "{"
+		case MapEnd:
+			return "}"
+		default:
+			panic("Unknown TerminalValue")
+	}
+}
+
+type ValueNull struct {}
+func (value ValueNull) Atomise(in []Atom) []Atom {
+	return append(in, NewAtomNull())
+}
+func (value ValueNull) String() string {
+	return "null"
+}
+
+type ValueBool bool
+func (value ValueBool) Atomise(in []Atom) []Atom {
+	return append(in, NewAtomBool(bool(value)))
+}
+func (value ValueBool) String() string {
+	if value {
+		return "true"
+	} else {
+		return "false"
+	}
+}
+
+type ValueNumber float64
+func (value ValueNumber) Atomise(in []Atom) []Atom {
+	return append(in, NewAtomNumber(float64(value)))
+}
+func (value ValueNumber) String() string {
+	v := float64(value)
+	return fmt.Sprintf("%f", v)
+}
+
+type ValueString string
+func (value ValueString) Atomise(in []Atom) []Atom {
+	in = append(in, NewAtomStringTerminal())
+	for _, char := range value {
+		in = append(in, NewAtomStringRune(char))
+	}
+	in = append(in, NewAtomStringTerminal())
+	return in
+}
+func (value ValueString) String() string {
+	return fmt.Sprintf("\"%s\"", string(value))
+}
+
+type Value interface {
+	// Append this values atoms to the input
+	Atomise(in []Atom) []Atom
+	String() string
+}