/*- YAML -*/

#keyset[parent, idx]
yaml (unique int id: @yaml_node,
      int kind: int ref,
      int parent: @yaml_node_parent ref,
      int idx: int ref,
      string tag: string ref,
      string tostring: string ref);

case @yaml_node.kind of
  0 = @yaml_scalar_node
| 1 = @yaml_mapping_node
| 2 = @yaml_sequence_node
| 3 = @yaml_alias_node
;

@yaml_collection_node = @yaml_mapping_node | @yaml_sequence_node;

@yaml_node_parent = @yaml_collection_node | @file;

yaml_anchors (unique int node: @yaml_node ref,
              string anchor: string ref);

yaml_aliases (unique int alias: @yaml_alias_node ref,
              string target: string ref);

yaml_scalars (unique int scalar: @yaml_scalar_node ref,
              int style: int ref,
              string value: string ref);

yaml_errors (unique int id: @yaml_error,
             string message: string ref);

yaml_locations(unique int locatable: @yaml_locatable ref,
             int location: @location_default ref);

@yaml_locatable = @yaml_node | @yaml_error;

/*- Files and folders -*/

/**
 * The location of an element.
 * The location spans column `startcolumn` of line `startline` to
 * column `endcolumn` of line `endline` in file `file`.
 * For more information, see
 * [Locations](https://codeql.github.com/docs/writing-codeql-queries/providing-locations-in-codeql-queries/).
 */
locations_default(
  unique int id: @location_default,
  int file: @file ref,
  int beginLine: int ref,
  int beginColumn: int ref,
  int endLine: int ref,
  int endColumn: int ref
);

files(
  unique int id: @file,
  string name: string ref
);

folders(
  unique int id: @folder,
  string name: string ref
);

@container = @file | @folder

containerparent(
  int parent: @container ref,
  unique int child: @container ref
);

/*- Source location prefix -*/

/**
 * The source location of the snapshot.
 */
sourceLocationPrefix(string prefix : string ref);