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Revert "Fix for escaping backslashes in interpolated strings (fixes #6737) (#7020)" (#7038)

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This reverts commit d4798d6ee1.
This commit is contained in:
Darren Schroeder
2022-11-06 16:17:00 -06:00
committed by GitHub
parent d4798d6ee1
commit a6118eed8d
2 changed files with 105 additions and 257 deletions
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147
crates/nu-parser/src/parser.rs
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@ -1604,104 +1604,87 @@ pub fn parse_string_interpolation(
let mut b = start;
let mut consecutive_backslashes: usize = 0;
while b != end {
let current_byte = contents[b - start];
if contents[b - start] == b'('
&& (if double_quote && (b - start) > 0 {
contents[b - start - 1] != b'\\'
} else {
true
})
&& mode == InterpolationMode::String
{
mode = InterpolationMode::Expression;
if token_start < b {
let span = Span {
start: token_start,
end: b,
};
let str_contents = working_set.get_span_contents(span);
match mode {
InterpolationMode::String => {
let preceding_consecutive_backslashes = consecutive_backslashes;
let str_contents = if double_quote {
let (str_contents, err) = unescape_string(str_contents, span);
error = error.or(err);
let is_backslash = current_byte == b'\\';
consecutive_backslashes = if is_backslash {
preceding_consecutive_backslashes + 1
str_contents
} else {
0
str_contents.to_vec()
};
if current_byte == b'('
&& (!double_quote || preceding_consecutive_backslashes % 2 == 0)
{
mode = InterpolationMode::Expression;
output.push(Expression {
expr: Expr::String(String::from_utf8_lossy(&str_contents).to_string()),
span,
ty: Type::String,
custom_completion: None,
});
token_start = b;
}
}
if mode == InterpolationMode::Expression {
let byte = contents[b - start];
if let Some(b'\'') = delimiter_stack.last() {
if byte == b'\'' {
delimiter_stack.pop();
}
} else if let Some(b'"') = delimiter_stack.last() {
if byte == b'"' {
delimiter_stack.pop();
}
} else if let Some(b'`') = delimiter_stack.last() {
if byte == b'`' {
delimiter_stack.pop();
}
} else if byte == b'\'' {
delimiter_stack.push(b'\'')
} else if byte == b'"' {
delimiter_stack.push(b'"');
} else if byte == b'`' {
delimiter_stack.push(b'`')
} else if byte == b'(' {
delimiter_stack.push(b')');
} else if byte == b')' {
if let Some(b')') = delimiter_stack.last() {
delimiter_stack.pop();
}
if delimiter_stack.is_empty() {
mode = InterpolationMode::String;
if token_start < b {
let span = Span {
start: token_start,
end: b,
};
let str_contents = working_set.get_span_contents(span);
let str_contents = if double_quote {
let (str_contents, err) = unescape_string(str_contents, span);
error = error.or(err);
str_contents
} else {
str_contents.to_vec()
end: b + 1,
};
output.push(Expression {
expr: Expr::String(String::from_utf8_lossy(&str_contents).to_string()),
span,
ty: Type::String,
custom_completion: None,
});
token_start = b;
let (expr, err) =
parse_full_cell_path(working_set, None, span, expand_aliases_denylist);
error = error.or(err);
output.push(expr);
}
}
}
InterpolationMode::Expression => {
let byte = current_byte;
if let Some(b'\'') = delimiter_stack.last() {
if byte == b'\'' {
delimiter_stack.pop();
}
} else if let Some(b'"') = delimiter_stack.last() {
if byte == b'"' {
delimiter_stack.pop();
}
} else if let Some(b'`') = delimiter_stack.last() {
if byte == b'`' {
delimiter_stack.pop();
}
} else if byte == b'\'' {
delimiter_stack.push(b'\'')
} else if byte == b'"' {
delimiter_stack.push(b'"');
} else if byte == b'`' {
delimiter_stack.push(b'`')
} else if byte == b'(' {
delimiter_stack.push(b')');
} else if byte == b')' {
if let Some(b')') = delimiter_stack.last() {
delimiter_stack.pop();
}
if delimiter_stack.is_empty() {
mode = InterpolationMode::String;
if token_start < b {
let span = Span {
start: token_start,
end: b + 1,
};
let (expr, err) = parse_full_cell_path(
working_set,
None,
span,
expand_aliases_denylist,
);
error = error.or(err);
output.push(expr);
}
token_start = b + 1;
continue;
}
token_start = b + 1;
continue;
}
}
}
b += 1;
}