vcFormat does not work near the end of a file with UTF-8 characters > 1 byte

[Aegel5]

Bug type: Language Service

Describe the bug

• OS and Version: NT 10.0.19042
• VS Code Version: 1.57.0
• C/C++ Extension Version: 1.5.0

Steps to reproduce

1. Open b.cpp source file with settings.json
2. Set cursor after task(){
3. Press 'enter' - additional spaces would be inserted
4. Call 'format document' - no result

Expected behavior
'format document' need to be worked
'Enter' must not create additional spaces

b.cpp

ll C_KOMB(ll n, ll k) { return fact(n) / (fact(k) * fact(n - k)); } // кол-во выборок без учета порядка, n - всего, k - сколько нужно взять в набор
ll A_KOMB(ll n, ll k) { return fact(n) / fact(n - k); }             // Дополнительно добавляет фактор порядка, т.е. (1,2) и (2,1) - разные выборки.

void task(){
                
                    


int a = 10;          

}

settings.json

{
    "editor.formatOnType": true,
    "C_Cpp.formatting": "vcFormat",
    "C_Cpp.vcFormat.newLine.beforeElse": false,
    "editor.formatOnPaste": true
}

[sean-mcmanus]

A minimum repro is

//ллл
void f(){}

or

//ллл
1+1;

[Colengms]

The vcFormat library is shared with VS. However, we instantiate it for use with char, while VS uses wchar_t. This might be an issue with failing to consider UTF-8 sequences when detecting certain characters that influence formatting.