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proto_include/google/api/expr/v1beta1/decl.proto

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+// Copyright 2019 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;
+
+import "google/api/expr/v1beta1/expr.proto";
+
+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 = "DeclProto";
+option java_package = "com.google.api.expr.v1beta1";
+
+// A declaration.
+message Decl {
+  // The id of the declaration.
+  int32 id = 1;
+
+  // The name of the declaration.
+  string name = 2;
+
+  // The documentation string for the declaration.
+  string doc = 3;
+
+  // The kind of declaration.
+  oneof kind {
+    // An identifier declaration.
+    IdentDecl ident = 4;
+
+    // A function declaration.
+    FunctionDecl function = 5;
+  }
+}
+
+// The declared type of a variable.
+//
+// Extends runtime type values with extra information used for type checking
+// and dispatching.
+message DeclType {
+  // The expression id of the declared type, if applicable.
+  int32 id = 1;
+
+  // The type name, e.g. 'int', 'my.type.Type' or 'T'
+  string type = 2;
+
+  // An ordered list of type parameters, e.g. `<string, int>`.
+  // Only applies to a subset of types, e.g. `map`, `list`.
+  repeated DeclType type_params = 4;
+}
+
+// An identifier declaration.
+message IdentDecl {
+  // Optional type of the identifier.
+  DeclType type = 3;
+
+  // Optional value of the identifier.
+  Expr value = 4;
+}
+
+// A function declaration.
+message FunctionDecl {
+  // The function arguments.
+  repeated IdentDecl args = 1;
+
+  // Optional declared return type.
+  DeclType return_type = 2;
+
+  // If the first argument of the function is the receiver.
+  bool receiver_function = 3;
+}