https://issues.dlang.org/show_bug.cgi?id=24032

FeepingCreature <default_357-line@yahoo.de> changed:

           What    |Removed                     |Added
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                 CC|                            |default_357-line@yahoo.de

--- Comment #1 from FeepingCreature <default_357-line@yahoo.de> ---
Yes, Q{} is defined in the grammar as a "token string" which must consist of valid D tokens, because it's meant to pass around fragments of source code. "0X" stopped being a valid token in DMD 2.084.0: https://dlang.org/changelog/2.084.0.html#deprecated_binary_literals

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https://issues.dlang.org/show_bug.cgi?id=24032

--- Comment #2 from FeepingCreature <default_357-line@yahoo.de> ---
If you can replace the string with `q{0x0}`, that should work. Alternately, pass a regular `"0x"` string.

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https://issues.dlang.org/show_bug.cgi?id=24032

--- Comment #3 from Puneet Goel <puneet@coverify.org> ---
I am using q{} to write my own DSL.

For this particular thing, I need to extend binary number strings in a way where I can write stuff like 0b?01?11 where '?' can be used for pattern matching. So, this becomes blocking for me. Is there an easy solution, or do I need to discover an alternate syntax for my need?

BTW, what advantage do we gain by making the compiler parse q{} as a token string?

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https://issues.dlang.org/show_bug.cgi?id=24032

--- Comment #4 from Puneet Goel <puneet@coverify.org> ---
Even if we have to do token parsing for q{}, the following code should not fail.


class Foo(string str) {}
void main() {
  Foo!q{string str = "0X"} foo;
  Foo!q{string str = "0B"} bar;
}

The compiler gives the same errors as it gives for q{0B} and q{0X}.

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https://issues.dlang.org/show_bug.cgi?id=24032

--- Comment #5 from Puneet Goel <puneet@coverify.org> ---
Please ignore the previous comment. There was a mistake at my end.

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https://issues.dlang.org/show_bug.cgi?id=24032

--- Comment #6 from FeepingCreature <default_357-line@yahoo.de> ---
The easy solution would be writing `foo!"0b?01?11"`. `q{}` is intended for fragments of D code.

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https://issues.dlang.org/show_bug.cgi?id=24032

Dennis <dkorpel@live.nl> changed:

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
                 CC|                            |dkorpel@live.nl
           Hardware|x86_64                      |All
         Resolution|---                         |INVALID
                 OS|Linux                       |All

--- Comment #7 from Dennis <dkorpel@live.nl> ---
Like FeepingCreature said, q{} is a string of D tokens, typically used for string mixin purposes. dmd's behavior is correct. Please use a different string literal kind for strings with code from other languages.

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