syntax = "proto3";

package cel.expr;

import "google/protobuf/duration.proto";
import "google/protobuf/struct.proto";
import "google/protobuf/timestamp.proto";

message ParsedExpr {
  .cel.expr.Expr expr = 2;
  .cel.expr.SourceInfo source_info = 3;
}

message Expr {
  message Ident {
    string name = 1;
  }

  message Select {
    .cel.expr.Expr operand = 1;
    string field = 2;
    bool test_only = 3;
  }

  message Call {
    .cel.expr.Expr target = 1;
    string function = 2;
    repeated .cel.expr.Expr args = 3;
  }

  message CreateList {
    repeated .cel.expr.Expr elements = 1;
    repeated int32 optional_indices = 2;
  }

  message CreateStruct {
    message Entry {
      int64 id = 1;
      oneof key_kind {
        string field_key = 2;
        .cel.expr.Expr map_key = 3;
      }
      .cel.expr.Expr value = 4;
      bool optional_entry = 5;
    }

    string message_name = 1;
    repeated .cel.expr.Expr.CreateStruct.Entry entries = 2;
  }

  message Comprehension {
    string iter_var = 1;
    string iter_var2 = 8;
    .cel.expr.Expr iter_range = 2;
    string accu_var = 3;
    .cel.expr.Expr accu_init = 4;
    .cel.expr.Expr loop_condition = 5;
    .cel.expr.Expr loop_step = 6;
    .cel.expr.Expr result = 7;
  }

  int64 id = 2;
  oneof expr_kind {
    .cel.expr.Constant const_expr = 3;
    .cel.expr.Expr.Ident ident_expr = 4;
    .cel.expr.Expr.Select select_expr = 5;
    .cel.expr.Expr.Call call_expr = 6;
    .cel.expr.Expr.CreateList list_expr = 7;
    .cel.expr.Expr.CreateStruct struct_expr = 8;
    .cel.expr.Expr.Comprehension comprehension_expr = 9;
  }
}

message Constant {
  oneof constant_kind {
    .google.protobuf.NullValue null_value = 1;
    bool bool_value = 2;
    int64 int64_value = 3;
    uint64 uint64_value = 4;
    double double_value = 5;
    string string_value = 6;
    bytes bytes_value = 7;
    .google.protobuf.Duration duration_value = 8 [deprecated = true];
    .google.protobuf.Timestamp timestamp_value = 9 [deprecated = true];
  }
}

message SourceInfo {
  message Extension {
    message Version {
      int64 major = 1;
      int64 minor = 2;
    }

    enum Component {
      COMPONENT_UNSPECIFIED = 0;
      COMPONENT_PARSER = 1;
      COMPONENT_TYPE_CHECKER = 2;
      COMPONENT_RUNTIME = 3;
    }

    string id = 1;
    repeated .cel.expr.SourceInfo.Extension.Component affected_components = 2;
    .cel.expr.SourceInfo.Extension.Version version = 3;
  }

  string syntax_version = 1;
  string location = 2;
  repeated int32 line_offsets = 3;
  map<int64, int32> positions = 4;
  map<int64, .cel.expr.Expr> macro_calls = 5;
  repeated .cel.expr.SourceInfo.Extension extensions = 6;
}