Escape characters are highlighted in character arrays

[goldrik]

Describe the bug
When initializing a raw string variable, escape characters (backslash + char) get highlighted by default. This occurs for character arrays (using single quotes), but not for strings (using double quotes).

For example, when defining a Windows path:
temp_path = '\\somedrive\path\to\right\folder\';
In this case, the escape characters \\, \r, \t, and \f characters would be highlighted.

If you do the same but with double quotations, the error does not occur. This is the expected behavior.

[dklilley]

Hi @goldrik , thanks for reporting this!

For clarity, can you please attach an image showing this behavior?

[goldrik]

Yup, here's the same string, initialized as a character array, then as a string.

[dklilley]

I don't think it is a bug that the escape characters are being highlighted in character vectors - they are explicitly being tokenized as constant.character.escape.matlab. It is definitely incorrect, however, that they are being treated differently between char vectors and string arrays.

I am moving this issue over to the MATLAB-Language-grammar repository, because this is an issue with the grammar.