cue: allow getting Runtime from Instance
Needed for goc Codec and probably useful
across the board.
Change-Id: Ib3e2c0b514a09815375f77d3d05d33e0411d20c2
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/2710
Reviewed-by: Marcel van Lohuizen <mpvl@golang.org>
diff --git a/cue/build.go b/cue/build.go
index 4285d63..b00fd86 100644
--- a/cue/build.go
+++ b/cue/build.go
@@ -27,6 +27,7 @@
"cuelang.org/go/cue/errors"
"cuelang.org/go/cue/format"
"cuelang.org/go/cue/token"
+ "cuelang.org/go/internal"
)
// A Runtime is used for creating CUE interpretations.
@@ -38,6 +39,12 @@
idx *index
}
+func init() {
+ internal.GetRuntime = func(instance interface{}) interface{} {
+ return &Runtime{idx: instance.(*Instance).index}
+ }
+}
+
func dummyLoad(token.Pos, string) *build.Instance { return nil }
func (r *Runtime) index() *index {
diff --git a/internal/internal.go b/internal/internal.go
index 261b9d6..d9b82a7 100644
--- a/internal/internal.go
+++ b/internal/internal.go
@@ -53,3 +53,6 @@
// UnifyBuiltin returns the given Value unified with the given builtin template.
var UnifyBuiltin func(v interface{}, kind string) interface{}
+
+// GetRuntime reports the runtime for an Instance.
+var GetRuntime func(instance interface{}) interface{}
