Subword highlighting

[danielshahaf]

Currently, echo foo paints foo in 5 8 none and echo "foo" paints "foo" in 5 10 none 5 10 fg=yellow. These correspond to (default) and (default double-quoted-argument) in terms of styles.

This seems asymmetric, shouldn't there be some un-quoted-argument style to parallel double-quoted-argument? So the rule would be that each word gets a "word style" (single-hyphen-option, path, positional-argument) and "subword styles" for any ''/$''/""-quoted portions thereof?

This is a consequence of the recent changes that made double-quoted-argument a subword style; before that the only case resembling subword styles was dollar-double-quoted-argument: : "$foo" → typeset -a region_highlight=( '0 1 fg=green' '2 8 fg=yellow' '3 7 fg=cyan' ). This case still exists, so things like rsync --"delete-${when}" have three layers of nesting: double-hyphen-option, double-quoted-argument, dollar-double-quoted-argument.

Compare #362 (zstyle).