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builtin set: make slice index range optional, like in slice expansion

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Expansion parses slices like "$PATH[1..2]", but so does "set" when assigning
"set PATH[1..2] . .".  Commit be06f842a ("Allow to omit indices in index
range expansions") forgot the latter.
This commit is contained in:
Johannes Altmanninger 2021-01-28 06:52:54 +01:00
parent ca3d226659
commit 062f24d91b
3 changed files with 42 additions and 18 deletions
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48
src/builtin_set.cpp
View file

@ -269,7 +269,8 @@ static bool validate_path_warning_on_colons(const wchar_t *cmd,
// not the (missing) local value. Also don't bother to complain about relative paths, which
// don't start with /.
const auto existing_variable = vars.get(key, ENV_DEFAULT);
const wcstring_list_t &existing_values = existing_variable ? existing_variable->as_list() : wcstring_list_t{};
const wcstring_list_t &existing_values =
existing_variable ? existing_variable->as_list() : wcstring_list_t{};
for (const wcstring &dir : list) {
if (!string_prefixes_string(L"/", dir) || contains(existing_values, dir)) {
@ -341,8 +342,8 @@ static void handle_env_return(int retval, const wchar_t *cmd, const wchar_t *key
/// Call vars.set. If this is a path variable, e.g. PATH, validate the elements. On error, print a
/// description of the problem to stderr.
static int env_set_reporting_errors(const wchar_t *cmd, const wchar_t *key, int scope,
wcstring_list_t list, io_streams_t &streams,
env_stack_t &vars, std::vector<event_t> *evts) {
wcstring_list_t list, io_streams_t &streams, env_stack_t &vars,
std::vector<event_t> *evts) {
if (is_path_variable(key) && !validate_path_warning_on_colons(cmd, key, list, streams, vars)) {
return STATUS_CMD_ERROR;
}
@ -377,23 +378,38 @@ static int parse_index(std::vector<long> &indexes, wchar_t *src, int scope, io_s
while (*p != L']') {
const wchar_t *end;
long l_ind = fish_wcstol(p, &end);
if (errno > 0) { // ignore errno == -1 meaning the int did not end with a '\0'
streams.err.append_format(_(L"%ls: Invalid index starting at '%ls'\n"), L"set", src);
return -1;
long l_ind;
if (indexes.empty() && *p == L'.' && p[1] == L'.') {
// If we are at the first index expression, a missing start-index means the range starts
// at the first item.
l_ind = 1; // first index
} else {
l_ind = fish_wcstol(p, &end);
if (errno > 0) { // ignore errno == -1 meaning the int did not end with a '\0'
streams.err.append_format(_(L"%ls: Invalid index starting at '%ls'\n"), L"set",
src);
return -1;
}
p = const_cast<wchar_t *>(end);
}
p = const_cast<wchar_t *>(end);
// Convert negative index to a positive index.
if (l_ind < 0) l_ind = varsize + l_ind + 1;
if (*p == L'.' && *(p + 1) == L'.') {
p += 2;
long l_ind2 = fish_wcstol(p, &end);
if (errno > 0) { // ignore errno == -1 meaning the int did not end with a '\0'
return -1;
long l_ind2;
// If we are at the last index range expression, a missing end-index means the range
// spans until the last item.
if (indexes.empty() && *p == L']') {
l_ind2 = -1;
} else {
l_ind2 = fish_wcstol(p, &end);
if (errno > 0) { // ignore errno == -1 meaning the int did not end with a '\0'
return -1;
}
p = const_cast<wchar_t *>(end);
}
p = const_cast<wchar_t *>(end);
// Convert negative index to a positive index.
if (l_ind2 < 0) l_ind2 = varsize + l_ind2 + 1;
@ -676,8 +692,8 @@ static int builtin_set_erase(const wchar_t *cmd, set_cmd_opts_t &opts, int argc,
wcstring_list_t result;
dest_var->to_list(result);
erase_values(result, indexes);
retval =
env_set_reporting_errors(cmd, dest, scope, std::move(result), streams, parser.vars(), &evts);
retval = env_set_reporting_errors(cmd, dest, scope, std::move(result), streams,
parser.vars(), &evts);
}
// Fire any events.
@ -800,8 +816,8 @@ static int builtin_set_set(const wchar_t *cmd, set_cmd_opts_t &opts, int argc, w
if (retval != STATUS_CMD_OK) return retval;
std::vector<event_t> evts;
retval =
env_set_reporting_errors(cmd, varname, scope, std::move(new_values), streams, parser.vars(), &evts);
retval = env_set_reporting_errors(cmd, varname, scope, std::move(new_values), streams,
parser.vars(), &evts);
// Fire any events.
for (const auto &evt : evts) {
event_fire(parser, evt);

4
src/expand.cpp
View file

@ -206,7 +206,7 @@ static size_t parse_slice(const wchar_t *in, wchar_t **end_ptr, std::vector<long
const wchar_t *end;
long tmp;
if (idx.empty() && in[pos] == L'.' && in[pos + 1] == L'.') {
// If we are at the first index expression, a missing start index means the range starts
// If we are at the first index expression, a missing start-index means the range starts
// at the first item.
tmp = 1; // first index
end = &in[pos];
@ -229,7 +229,7 @@ static size_t parse_slice(const wchar_t *in, wchar_t **end_ptr, std::vector<long
while (iswspace(in[pos])) pos++; // Allow the space in "[.. ]".
long tmp1;
// Check if we are at the last index range expression, a missing end index means the
// If we are at the last index range expression then a missing end-index means the
// range spans until the last item.
if (in[pos] == L']') {
tmp1 = -1; // last index

8
tests/checks/slices.fish
View file

@ -70,3 +70,11 @@ echo $test[ (true)..3]
#CHECK:
echo $test[ (string join \n 1 2 3)..3 ]
#CHECK: 1 2 3 2 3 3
set -l list 1 2 3
set list[..2] $list[2..1]
echo $list # CHECK: 2 1 3
set -l list 1 2 3
set list[2..] $list[-1..2]
echo $list # CHECK: 1 3 2