What are delimited string, heredoc and D token strings?

Simen kjaeraas simen.kjaras at gmail.com
Sun Jun 27 06:52:57 PDT 2010

Pierre Rouleau <prouleau001 at gmail.com> wrote:

> Hi all,
> The D2.0 lexical page describes delimited string and token string  
> literals.  Is there any example of how these are used and why, somewhere?

Token strings are added for the specific use case of string mixins[1].
They must contain valid D code.

mixin( q{ a = b; } ); // Works.
mixin( q{ this is nonsense, I tell you! } ); // Does not work.

Editors may syntax-highlight token strings as if it were normal code.
They often do, by virtue of having no idea that it is indeed a string.

Delimited strings and heredoc strings exist for simplicity of adding long
strings to the source.

Heredoc strings allow you to add long string literals to your code.
They also let you embed "quotes" 'of' `various` ´kinds´ without escaping

q"(Delimited strings are much the same as "heredoc" strings, but somewhat
more succinct, by not using a whole identifier for terminators. They are
thus not as suited for long texts.)"

[1]: http://digitalmars.com/d/2.0/statement.html#MixinStatement

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