(Rust) Escaped double quotations in string at attribute are not highlighted properly

[keiichiw]

Describe the issue

Escaped double quotations in string at attributes are not treated as a escaped character but a normal quotation.

Which language seems to have the issue?

Rust

Sample Code to Reproduce

#[derive(ThisError)]
enum MyError {
  #[error("\" appears in a string")]
  UnexpectedDoubleQuote
}

fn main() {}

sample at jsfiddle

Expected behavior

The escaped double quotation \" shouldn't be treated as a normal double quotation.

[joshgoebel]

Confirm. Looks like a good first issue, probably need to reuse the full string rules inside meta... can ALL the syntactic features of strings be used in a #[] block?

[mohiyaddeen7]

{
className: 'string',
variants: [
{ begin: /b?r(#)"(.|\n)?"\1(?!#)/ }, // Handles raw strings with escaped double quotes
{ begin: /b?'\?(x\w{2}|u\w{4}|U\w{8}|.)'/ } // Handles character literals with escaped double quotes
]
]
}

we should add (.|\")*? to the first variant to match any character or an escaped double quote within the string.
we should add (\") to the second variant to allow for escaped double quotation marks within character literals.

update code snippet :

{
className: 'string',
variants: [
{ begin: /b?r(#)"(.|\")?"\1(?!#)/ }, // Handles raw strings with escaped double quotes
{ begin: /b?'\?(x\w{2}|u\w{4}|U\w{8}|.|\")'/ } // Handles character literals with escaped double quotes
]
}

please correct me if i am wrong.

[joshgoebel]

Very hard to review code here when just thrown in as regular text, but if you'd be game to make a PR I'd be happy to review.