Notably, the 'single-hyphen-option' and 'assign' contexts both default to the
'none' style, so before this patch, the tests would not have detected a failure
to apply those two contexts.
For other contexts, using $unused_highlight only helps detect the case where
the right highlight style (e.g., 'fg=yellow') is used as a result of applying
the wrong context — which should be a theoretical failure mode.
This is part of zsh-users/zsh-syntax-highlighting#198.
Fixeszsh-users/zsh-syntax-highlighting#195.
The one revision made on master between this branch's creation and merge
already uses correct offsets.
* danielsh/i195-tests-offbyone-v1:
New test for dollar-double-quoted-argument.
test harness: Fix off-by-one discrepancy between observed and expected.
'local' is a reserved word in zsh 5.1 but not in earlier versions [1].
Therefore, under zsh older than 5.1, quoting is required.
This manifested as random «builtin=''» in emitted to the terminal, and
commands (such as 'echo') highlighted as errors (in red).
[1] https://github.com/zsh-users/zsh/blob/master/README#L46
(the section "Incompatibilites between 5.0.8 and 5.1")
Given the following input:
PREBUFFER=$'echo "foo\n'
BUFFER='bar"'
This patch causes the '"foo' part to be highlighted as a string. There
is no test because the tests only check highlighting of BUFFER, and 'bar"'
is already highlighted correctly.
If one defines aliases like `++` the alias builtin tries to interprete these
as options so they have to be protected like this
alias -- ++=true
The same goes for a call to `alias` in order to expand the alias again.
This code is more lenient than bash. Examples:
$ x[y[]=
zsh: no matches found: x[y[]=
$ x[][]=
zsh: no matches found: x[][]=
The proper solution is to look inside the [...] and make sure that all
unescaped/unquoted square brackes are matched, but that is a heck of
a lot more complicated than this simple 8-character patch.
Zsh does not allow the variable name or the equals sign to be quoted or
escaped. The previous code incorrectly highlighted the following
examples as assignments:
$ 'x=y'
zsh: command not found: x=y
$ x\=y
zsh: command not found: x=y
$ "x"=y
zsh: command not found: x=y
$ \x=y
zsh: command not found: x=y
