decoder: Implement reference origins for Object

decoder/expr_object.go

@@ -14,11 +14,6 @@ type Object struct {
 	pathCtx *PathContext
 }
 
-func (obj Object) ReferenceOrigins(ctx context.Context, allowSelfRefs bool) reference.Origins {
-	// TODO
-	return nil
-}
-
 func (obj Object) ReferenceTargets(ctx context.Context, targetCtx *TargetContext) reference.Targets {
 	// TODO
 	return nil

decoder/expr_object_ref_origins.go

@@ -0,0 +1,42 @@
+package decoder
+
+import (
+	"context"
+
+	"github.com/hashicorp/hcl-lang/reference"
+	"github.com/hashicorp/hcl/v2/hclsyntax"
+)
+
+func (obj Object) ReferenceOrigins(ctx context.Context, allowSelfRefs bool) reference.Origins {
+	eType, ok := obj.expr.(*hclsyntax.ObjectConsExpr)
+	if !ok {
+		return reference.Origins{}
+	}
+
+	if len(eType.Items) == 0 || len(obj.cons.Attributes) == 0 {
+		return reference.Origins{}
+	}
+
+	origins := make(reference.Origins, 0)
+
+	for _, item := range eType.Items {
+		attrName, _, ok := rawObjectKey(item.KeyExpr)
+		if !ok {
+			continue
+		}
+
+		aSchema, ok := obj.cons.Attributes[attrName]
+		if !ok {
+			// skip unknown attribute
+			continue
+		}
+
+		expr := newExpression(obj.pathCtx, item.ValueExpr, aSchema.Constraint)
+
+		if elemExpr, ok := expr.(ReferenceOriginsExpression); ok {
+			origins = append(origins, elemExpr.ReferenceOrigins(ctx, allowSelfRefs)...)
+		}
+	}
+
+	return origins
+}