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digitalmars.D.learn - Real beginner traits question

reply WhatMeForget <kheaser gmail.com> writes:
This is taken exactly from the traits documentation.

------------------------------------------------

25 Traits

25.21 identifier

Takes one argument, a symbol. Returns the identifier for that 
symbol as a string literal.

------------------------------------------------


There are no examples. My naive brain keeps thinking that a 
symbol and an identifier are the same things.  Can someone give 
me good definitions of "symbol" and "identifier".   And maybe an 
example if it is not too much trouble.
Sep 24
next sibling parent rikki cattermole <rikki cattermole.co.nz> writes:
On 25/09/2017 6:28 AM, WhatMeForget wrote:
 
 This is taken exactly from the traits documentation.
 
 ------------------------------------------------
 
 25 Traits
 
 25.21 identifier
 
 Takes one argument, a symbol. Returns the identifier for that symbol as 
 a string literal.
 
 ------------------------------------------------
 
 
 There are no examples. My naive brain keeps thinking that a symbol and 
 an identifier are the same things.  Can someone give me good definitions 
 of "symbol" and "identifier".   And maybe an example if it is not too 
 much trouble.
```D void main() {} pragma(msg, __traits(identifier, main)); pragma(msg, __traits(identifier, Foo)); pragma(msg, __traits(identifier, Foo.func)); struct Foo { void func(); } ``` ``` main Foo func ```
Sep 24
prev sibling next sibling parent reply "H. S. Teoh" <hsteoh quickfur.ath.cx> writes:
On Mon, Sep 25, 2017 at 05:28:13AM +0000, WhatMeForget via Digitalmars-d-learn
wrote:
 
 This is taken exactly from the traits documentation.
 
 ------------------------------------------------
 
 25 Traits
 
 25.21 identifier
 
 Takes one argument, a symbol. Returns the identifier for that symbol
 as a string literal.
 
 ------------------------------------------------
 
 
 There are no examples. My naive brain keeps thinking that a symbol and
 an identifier are the same things.  Can someone give me good
 definitions of "symbol" and "identifier".   And maybe an example if it
 is not too much trouble.
You're not the only one. I stared at this same piece of documentation for a long time before I figured out what it meant. This is another example of poor documentation writing. Please file a bug, and I'll see if I can get around to making an example for it. T -- Notwithstanding the eloquent discontent that you have just respectfully expressed at length against my verbal capabilities, I am afraid that I must unfortunately bring it to your attention that I am, in fact, NOT verbose.
Sep 24
parent reply WhatMeWorry <kheaser gmail.com> writes:
On Monday, 25 September 2017 at 06:07:58 UTC, H. S. Teoh wrote:
 On Mon, Sep 25, 2017 at 05:28:13AM +0000, WhatMeForget via 
 Digitalmars-d-learn wrote:
 [...]
You're not the only one. I stared at this same piece of documentation for a long time before I figured out what it meant. This is another example of poor documentation writing. Please file a bug, and I'll see if I can get around to making an example for it. T
Thanks. I just created my first enhancement request, issue 17856.
Sep 25
parent "H. S. Teoh" <hsteoh quickfur.ath.cx> writes:
On Mon, Sep 25, 2017 at 03:41:14PM +0000, WhatMeWorry via Digitalmars-d-learn
wrote:
 On Monday, 25 September 2017 at 06:07:58 UTC, H. S. Teoh wrote:
 On Mon, Sep 25, 2017 at 05:28:13AM +0000, WhatMeForget via
 Digitalmars-d-learn wrote:
 [...]
You're not the only one. I stared at this same piece of documentation for a long time before I figured out what it meant. This is another example of poor documentation writing. Please file a bug, and I'll see if I can get around to making an example for it. T
Thanks. I just created my first enhancement request, issue 17856.
https://github.com/dlang/dlang.org/pull/1899 T -- If creativity is stifled by rigid discipline, then it is not true creativity.
Sep 25
prev sibling parent Jonathan M Davis <newsgroup.d jmdavisprog.com> writes:
On Monday, September 25, 2017 05:28:13 WhatMeForget via Digitalmars-d-learn 
wrote:
 This is taken exactly from the traits documentation.

 ------------------------------------------------

 25 Traits

 25.21 identifier

 Takes one argument, a symbol. Returns the identifier for that
 symbol as a string literal.

 ------------------------------------------------


 There are no examples. My naive brain keeps thinking that a
 symbol and an identifier are the same things.  Can someone give
 me good definitions of "symbol" and "identifier".   And maybe an
 example if it is not too much trouble.
Think of the identifier as the name for the symbol and the symbol as what the compiler is actually operating on. Typically, a symbol either has a type or is a type, whereas an identifier is just a name. For instance, when the compiler sees an identifier in your code, it has to look it up to figure out what its corresponding symbol is (and you'll get a compiler error if it can't figure out which symbol you mean - be it because there is no such symbol, the symbol hasn't been imported, the symbol is inaccessible, or because there are multiple symbols that you could be refering to, and there isn't enough information for it to know which you meant). Regardless, there really should be more examples on that page. - Jonathan M Davis
Sep 25