Token types. 
| Enumerator | 
|---|
| YAML_NO_TOKEN | An empty token.  | 
| YAML_STREAM_START_TOKEN | A STREAM-START token.  | 
| YAML_STREAM_END_TOKEN | A STREAM-END token.  | 
| YAML_VERSION_DIRECTIVE_TOKEN | A VERSION-DIRECTIVE token.  | 
| YAML_TAG_DIRECTIVE_TOKEN | A TAG-DIRECTIVE token.  | 
| YAML_DOCUMENT_START_TOKEN | A DOCUMENT-START token.  | 
| YAML_DOCUMENT_END_TOKEN | A DOCUMENT-END token.  | 
| YAML_BLOCK_SEQUENCE_START_TOKEN | A BLOCK-SEQUENCE-START token.  | 
| YAML_BLOCK_MAPPING_START_TOKEN | A BLOCK-MAPPING-START token.  | 
| YAML_BLOCK_END_TOKEN | A BLOCK-END token.  | 
| YAML_FLOW_SEQUENCE_START_TOKEN | A FLOW-SEQUENCE-START token.  | 
| YAML_FLOW_SEQUENCE_END_TOKEN | A FLOW-SEQUENCE-END token.  | 
| YAML_FLOW_MAPPING_START_TOKEN | A FLOW-MAPPING-START token.  | 
| YAML_FLOW_MAPPING_END_TOKEN | A FLOW-MAPPING-END token.  | 
| YAML_BLOCK_ENTRY_TOKEN | A BLOCK-ENTRY token.  | 
| YAML_FLOW_ENTRY_TOKEN | A FLOW-ENTRY token.  | 
| YAML_KEY_TOKEN | A KEY token.  | 
| YAML_VALUE_TOKEN | A VALUE token.  | 
| YAML_ALIAS_TOKEN | An ALIAS token.  | 
| YAML_ANCHOR_TOKEN | An ANCHOR token.  | 
| YAML_TAG_TOKEN | A TAG token.  | 
| YAML_SCALAR_TOKEN | A SCALAR token.  |