Example 8.18. Implicit Block Mapping Entries = fails to parse

[asomov]

The "Example 8.18. Implicit Block Mapping Entries"

plain key: in-line value
 :  # Both empty
"quoted key":
- entry

fails with an error:

bad indentation of a mapping entry at line 2, column 2:
     :  # Both empty
     ^

[eemeli]

This is not a parser bug, it's intended behaviour. Example 18.8 in the spec uses the ° glyph to represent empty scalars, i.e. it's not meant to have a character representation in the YAML source. This is explained in section 7.2 of the spec, Empty Nodes:

In the examples, empty scalars are sometimes displayed as the glyph “°” for clarity. Note that this glyph corresponds to a position in the characters stream rather than to an actual character.

Other parsers also fail with the same input, as they should:

import YAML from 'yaml'

const src = `
plain key: in-line value
 :  # Both empty
"quoted key":
- entry\n`

YAML.parse(src)
  // throws YAMLSemanticError:
  // Nested mappings are not allowed in compact mappings

[puzrin]

Thanks for clarification!