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Use maybe_t in unescape_string_internal

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This commit is contained in:
ridiculousfish 2019-09-14 13:17:22 -07:00
parent fa1dab040b
commit 8747018cbc
2 changed files with 17 additions and 15 deletions
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30
src/common.cpp
View file

@ -1480,8 +1480,8 @@ static bool unescape_string_internal(const wchar_t *const input, const size_t in
for (size_t input_position = 0; input_position < input_len && !errored; input_position++) {
const wchar_t c = input[input_position];
// Here's the character we'll append to result, or NOT_A_WCHAR to suppress it.
wint_t to_append_or_none = c;
// Here's the character we'll append to result, or none() to suppress it.
maybe_t<wchar_t> to_append_or_none = c;
if (mode == mode_unquoted) {
switch (c) {
case L'\\': {
@ -1499,7 +1499,7 @@ static bool unescape_string_internal(const wchar_t *const input, const size_t in
input_position += *escape_chars - 1;
}
// We've already appended, don't append anything else.
to_append_or_none = NOT_A_WCHAR;
to_append_or_none = none();
break;
}
case L'~': {
@ -1602,18 +1602,21 @@ static bool unescape_string_internal(const wchar_t *const input, const size_t in
case L'\t':
case L' ': {
if (unescape_special && brace_count > 0) {
to_append_or_none = brace_text_start ? wint_t(BRACE_SPACE) : NOT_A_WCHAR;
to_append_or_none =
brace_text_start ? maybe_t<wchar_t>(BRACE_SPACE) : none();
}
break;
}
case L'\'': {
mode = mode_single_quotes;
to_append_or_none = unescape_special ? wint_t(INTERNAL_SEPARATOR) : NOT_A_WCHAR;
to_append_or_none =
unescape_special ? maybe_t<wchar_t>(INTERNAL_SEPARATOR) : none();
break;
}
case L'\"': {
mode = mode_double_quotes;
to_append_or_none = unescape_special ? wint_t(INTERNAL_SEPARATOR) : NOT_A_WCHAR;
to_append_or_none =
unescape_special ? maybe_t<wchar_t>(INTERNAL_SEPARATOR) : none();
break;
}
default: {
@ -1652,14 +1655,16 @@ static bool unescape_string_internal(const wchar_t *const input, const size_t in
}
}
} else if (c == L'\'') {
to_append_or_none = unescape_special ? wint_t(INTERNAL_SEPARATOR) : NOT_A_WCHAR;
to_append_or_none =
unescape_special ? maybe_t<wchar_t>(INTERNAL_SEPARATOR) : none();
mode = mode_unquoted;
}
} else if (mode == mode_double_quotes) {
switch (c) {
case L'"': {
mode = mode_unquoted;
to_append_or_none = unescape_special ? wint_t(INTERNAL_SEPARATOR) : NOT_A_WCHAR;
to_append_or_none =
unescape_special ? maybe_t<wchar_t>(INTERNAL_SEPARATOR) : none();
break;
}
case '\\': {
@ -1681,7 +1686,7 @@ static bool unescape_string_internal(const wchar_t *const input, const size_t in
}
case '\n': {
/* Swallow newline */
to_append_or_none = NOT_A_WCHAR;
to_append_or_none = none();
input_position += 1; /* Skip over the backslash */
break;
}
@ -1707,11 +1712,8 @@ static bool unescape_string_internal(const wchar_t *const input, const size_t in
}
// Now maybe append the char.
if (to_append_or_none != NOT_A_WCHAR) {
wchar_t to_append_char = static_cast<wchar_t>(to_append_or_none);
// If result_char is not NOT_A_WCHAR, it must be a valid wchar.
assert((wint_t)to_append_char == to_append_or_none);
result.push_back(to_append_char);
if (to_append_or_none.has_value()) {
result.push_back(*to_append_or_none);
}
}

2
src/expand.h
View file

@ -70,7 +70,7 @@ using expand_flags_t = enum_set_t<expand_flag>;
class completion_t;
enum {
enum : wchar_t {
/// Character representing a home directory.
HOME_DIRECTORY = EXPAND_RESERVED_BASE,
/// Character representing process expansion for %self.