Note that this does function must be called in compute_parse_data_nested()
and we cannot wait to initialize this attribute until apply_transformers(),
where all other attributes are initialized with
default_style_guide_attributes() (when using tidyverse_style()) because
for cached code, we don't build up the nested structure and leave it shallow
(to speed up things), see also drop_cached_children().
add_terminal_token_after(pd_flat)add_terminal_token_before(pd_flat)
add_attributes_caching(pd_flat, transformers, more_specs)
A flat parse table.
Passed to cache_make_key() to generate
a key.
Passed to cache_make_key() to generate
a key.
add_attributes_caching: Initializes newlines and lag_newlines.