interp: Make tovalue output behave as jq value

Now ex "tovalue | .some.thing" on a decode value will make some.thing be jq value
instead of a decode value which woud be displayed as a decode treee, seems confusing.

I think this is more intuetive and make more sense.

internal/gojqex/totype.go

@@ -24,6 +24,17 @@ func IsNull(x any) bool {
 }
 
 func ToGoJQValue(v any) (any, bool) {
+	return ToGoJQValueFn(v, func(v any) (any, bool) {
+		switch v := v.(type) {
+		case gojq.JQValue:
+			return v.JQValueToGoJQ(), true
+		default:
+			return nil, false
+		}
+	})
+}
+
+func ToGoJQValueFn(v any, valueFn func(v any) (any, bool)) (any, bool) {
 	switch vv := v.(type) {
 	case nil:
 		return vv, true
@@ -51,25 +62,16 @@ func ToGoJQValue(v any) (any, bool) {
 			if vv >= math.MinInt && vv <= math.MaxInt {
 				return int(vv), true
 			}
-			return vv, true
-		} else if vv.IsUint64() {
-			vv := vv.Uint64()
-			if vv <= math.MaxInt {
-				return int(vv), true
-			}
-			return vv, true
 		}
 		return vv, true
 	case string:
 		return vv, true
 	case []byte:
 		return string(vv), true
-	case gojq.JQValue:
-		return ToGoJQValue(vv.JQValueToGoJQ())
 	case []any:
 		vvs := make([]any, len(vv))
 		for i, v := range vv {
-			v, ok := ToGoJQValue(v)
+			v, ok := ToGoJQValueFn(v, valueFn)
 			if !ok {
 				return nil, false
 			}
@@ -79,7 +81,7 @@ func ToGoJQValue(v any) (any, bool) {
 	case map[string]any:
 		vvs := make(map[string]any, len(vv))
 		for k, v := range vv {
-			v, ok := ToGoJQValue(v)
+			v, ok := ToGoJQValueFn(v, valueFn)
 			if !ok {
 				return nil, false
 			}
@@ -87,6 +89,9 @@ func ToGoJQValue(v any) (any, bool) {
 		}
 		return vvs, true
 	default:
+		if nv, ok := valueFn(vv); ok {
+			return ToGoJQValueFn(nv, valueFn)
+		}
 		return nil, false
 	}
 }

pkg/interp/decode.go

@@ -305,19 +305,23 @@ func valueHas(key any, a func(name string) any, b func(key any) any) any {
 	return b(key)
 }
 
-// optsFn is a function as toValue is used by tovalue/0 so needs to be fast
+// TODO: make more efficient somehow? shallow values but might be hard
+// when things like tovalue.key should behave like a jq value and not a decode value etc
 func toValue(optsFn func() Options, v any) any {
-	switch v := v.(type) {
-	case JQValueEx:
-		if optsFn == nil {
-			return v.JQValueToGoJQ()
+	nv, _ := gojqex.ToGoJQValueFn(v, func(v any) (any, bool) {
+		switch v := v.(type) {
+		case JQValueEx:
+			if optsFn == nil {
+				return v.JQValueToGoJQ(), true
+			}
+			return v.JQValueToGoJQEx(optsFn), true
+		case gojq.JQValue:
+			return v.JQValueToGoJQ(), true
+		default:
+			return v, true
 		}
-		return v.JQValueToGoJQEx(optsFn)
-	case gojq.JQValue:
-		return v.JQValueToGoJQ()
-	default:
-		return v
-	}
+	})
+	return nv
 }
 
 type decodeValueKind int

pkg/interp/interp.jq

@@ -16,7 +16,8 @@ def display($opts):
   ( . as $c
   | options($opts) as $opts
   | try _todisplay catch $c
-  | if ($opts.value_output | not) and _can_display then _display($opts)
+  | if $opts.value_output then tovalue end
+  | if _can_display then _display($opts)
     else
       ( if _is_string and $opts.raw_string then print
         else _print_color_json($opts)

pkg/interp/testdata/tovalue.fqtest

@@ -1,4 +1,8 @@
 # TODO: use test format
+$ fq -i . test.mp3
+mp3> .headers[0] | tovalue.header.magic
+"ID3"
+mp3> ^D
 $ fq -i
 null> "aaa" | mp3_frame | .gap0 | tovalue, tovalue({sizebase: 2})
 "aaa"

pkg/interp/testdata/value_output.fqtest

@@ -20,3 +20,7 @@ ID3
   "unused": 0
 }
 35
+$ fq -o bits_format=base64 -V '.frames[0].audio_data' test.mp3
+"AAAAAAA="
+$ fq -o bits_format=base64 -Vr '.frames[0].audio_data' test.mp3
+AAAAAAA=