On Sep 19, 2013, at 1:56 PM, Oren Ben-Kiki <[email protected]> wrote:
> Just to make sure - how does the C++ syntax behave in the presence of line
> breaks? Specifically, what does it do with leading (and trailing) white space
> of each line? My guess is that they would be included in the string, is that
> correct?
It includes every single character that occurs in the source between the
delimiters. So
cout << R"(this is
a string");
will print "this is", newline, horizontal tab, "a string".
> At any rate, having some sort of here documents would be very nice. The C++
> syntax is reasonable, though I really don't have a strong preference here. It
> might be more Rust-ish to use a macro notation instead:
> str!(delimiter"....."delimiter), or something like that.
Not possible. This syntax needs to be part of the lexer, and macros/syntax
extensions operate on token trees, not on raw source characters.
-Kevin
> BTW, I found myself creating (in several languages) an "unindent" string
> function that would (1) if the string starts with a line break, remove it;
> (2) remove the leading white space of the 1st line from all the lines.
> Applying this to "here documents" allows indenting them together with the
> code that includes them. In Rust, the downside of this approach is that the
> result isn't &'static any more... Not that this warrants making such complex
> functionality a built-in of the syntax, of course.
>
> Oren.
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