--- /dev/null
+// Copyright 2018 Google LLC.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+syntax = "proto3";
+
+package google.api.expr.v1beta1;
+
+option cc_enable_arenas = true;
+option go_package = "google.golang.org/genproto/googleapis/api/expr/v1beta1;expr";
+option java_multiple_files = true;
+option java_outer_classname = "SourceProto";
+option java_package = "com.google.api.expr.v1beta1";
+
+// Source information collected at parse time.
+message SourceInfo {
+ // The location name. All position information attached to an expression is
+ // relative to this location.
+ //
+ // The location could be a file, UI element, or similar. For example,
+ // `acme/app/AnvilPolicy.cel`.
+ string location = 2;
+
+ // Monotonically increasing list of character offsets where newlines appear.
+ //
+ // The line number of a given position is the index `i` where for a given
+ // `id` the `line_offsets[i] < id_positions[id] < line_offsets[i+1]`. The
+ // column may be derivd from `id_positions[id] - line_offsets[i]`.
+ repeated int32 line_offsets = 3;
+
+ // A map from the parse node id (e.g. `Expr.id`) to the character offset
+ // within source.
+ map<int32, int32> positions = 4;
+}
+
+// A specific position in source.
+message SourcePosition {
+ // The soucre location name (e.g. file name).
+ string location = 1;
+
+ // The character offset.
+ int32 offset = 2;
+
+ // The 1-based index of the starting line in the source text
+ // where the issue occurs, or 0 if unknown.
+ int32 line = 3;
+
+ // The 0-based index of the starting position within the line of source text
+ // where the issue occurs. Only meaningful if line is nonzer..
+ int32 column = 4;
+}