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'main': Simplify alias handling.

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$last_alias isn't needed; there's no reason to treat loops of length 2
(alias a=b b=a) differently to loops of length 1 (alias a=a), length 3
(alias a=b b=c c=a), or length N.

The «(( $+seen_alias[$arg] ))» check is redundant as of the last commit:
the enclosing condition ensures that $res is "alias", which implies that
«(( $+seen_alias[$arg] ))» is false.
This commit is contained in:
Daniel Shahaf 2019-12-27 09:24:01 +00:00
parent 44aa6f1f4e
commit e5acdf0ba5
1 changed files with 4 additions and 7 deletions
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11
highlighters/main/main-highlighter.zsh
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@ -393,9 +393,7 @@ _zsh_highlight_main_highlighter_highlight_list()
# alias_style is the style to apply to an alias once in_alias=0
# Usually 'alias' but set to 'unknown-token' if any word expanded from
# the alias would be highlighted as unknown-token
# last_alias is the last alias arg (lhs) expanded (if in an alias).
# This allows for expanding alias ls='ls -l' while avoiding loops.
local alias_style arg buf=$4 highlight_glob=true last_alias style
local alias_style arg buf=$4 highlight_glob=true style
local in_array_assignment=false # true between 'a=(' and the matching ')'
# in_alias is equal to the number of shifts needed until arg=args[1] pops an
# arg from BUFFER and not added by an alias.
@ -473,7 +471,7 @@ _zsh_highlight_main_highlighter_highlight_list()
if (( in_alias )); then
(( in_alias-- ))
if (( in_alias == 0 )); then
last_alias= seen_alias=()
seen_alias=()
# start_pos and end_pos are of the alias (previous $arg) here
_zsh_highlight_main_add_region_highlight $start_pos $end_pos $alias_style
fi
@ -549,16 +547,15 @@ _zsh_highlight_main_highlighter_highlight_list()
# Expand aliases.
_zsh_highlight_main__type "$arg" "$(( ! ${+seen_alias[$arg]} ))"
local res="$REPLY"
if [[ $res == "alias" ]] && [[ $last_alias != $arg ]]; then
if [[ $res == "alias" ]]; then
# Avoid looping forever on alias a=b b=c c=b, but allow alias foo='foo bar'
# Also mark insane aliases as unknown-token (cf. #263).
if (( $+seen_alias[$arg] )) || [[ $arg == ?*=* ]]; then
if [[ $arg == ?*=* ]]; then
(( in_alias == 0 )) && in_alias=1
_zsh_highlight_main_add_region_highlight $start_pos $end_pos unknown-token
continue
fi
seen_alias[$arg]=1
last_alias=$arg
_zsh_highlight_main__resolve_alias $arg
local -a alias_args
# Elision is desired in case alias x=''