Replaces the workspace with 3 distinct registers: path, value and xreg

workspace contained a list of WalkItems, pairs of paths and values.
The new system can still hold a list of values but only one path, which is in itself a list of values.
The X register is miscellaneous. All 3 hold a list of values (which are JSON tokens)

1 files changed, 31 insertions, 0 deletions

diff --git a/walk/walk.go b/walk/walk.go
index 64f16ac..cc17245 100644
--- a/walk/walk.go
+++ b/walk/walk.go
@@ -5,10 +5,41 @@ import (
 	"encoding/json"
 	"fmt"
 	"strings"
+	"math"
 )
 
+// int or string
 type PathSegment interface {}
 type Path []PathSegment
+func (path Path) ToWalkValues() []WalkValue {
+	var values []WalkValue
+	for _, segment := range path {
+		switch s := segment.(type) {
+			case int:
+				values = append(values, ValueNumber(s))
+			case string:
+				values = append(values, ValueString(s))
+			default:
+				panic("Invalid PathSegment")
+		}
+	}
+	return values
+}
+
+func PathFromWalkValues(values []WalkValue) Path {
+	var segments []PathSegment
+	for _, value := range values {
+		switch v := value.(type) {
+			case ValueNumber:
+				segments = append(segments, int(math.Round(float64(v))))
+			case ValueString:
+				segments = append(segments, string(v))
+			default:
+				panic("Invalid value in path")
+		}
+	}
+	return segments
+}
 
 type TerminalValue int
 const (