std.format with named args

[Vitaliy Fadeev]

On Tuesday, 17 October 2023 at 06:57:07 UTC, Imperatorn wrote:
> On Tuesday, 17 October 2023 at 06:46:31 UTC, Vitaliy Fadeev 
> wrote:
>> Hi all!
>> I want readable mixin.
>> I want pass variable to string.
>> I want string with named args.
>> Like this:
>>
>> ```D
>>     enum JMP_ADDR_R = "RAX";
>>
>>     mixin( format!"asm {
>>         jmp [JMP_ADDR_R];
>>    }"( JMP_ADDR_R ));    // IT NOT WORK
>> ```
>>
>> Not this:
>>
>> ```D
>>     enum JMP_ADDR_R = "RAX";
>>
>>     mixin( format!"asm {
>>         jmp [%s];
>>    }"( JMP_ADDR_R ));    // WORK, BUT NOT-READABLE
>> ```
>>
>> In large code named identifiers more readable.
>>
>> In future it will used in jump table, like this:
>>
>> ```D
>>     mixin( format!"asm {
>>         lea JMP_ADDR_R, qword ptr [ JMP_I_R * PTR_SIZE + 
>> TBL_ADDR ];
>>         jmp [JMP_ADDR_R];
>>     }"( JMP_I_R, PTR_SIZE, TBL_ADDR, JMP_ADDR_R ));
>> ```
>>
>> Please, help me find a solution...
>> or exists std.format with named args ?
>> or another solution with named args ?
>
> Without string interpolation the best you can do is 
> https://dlang.org/library/std/conv/text.html
>
> Or write some code yourself, unfortunately

May be.

"String interpolation"
```D
     mixin( format!"asm {
         lea JMP_ADDR_R, qword ptr [ JMP_I_R * PTR_SIZE + TBL_ADDR 
];
         jmp [JMP_ADDR_R];
     }"( JMP_I_R, PTR_SIZE, TBL_ADDR, JMP_ADDR_R ));
```

vs

text()
```D
     mixin( text( "asm {
         lea", JMP_ADDR_R, ", qword ptr [ ", JMP_I_R, " * ", 
PTR_SIZE, " + ", TBL_ADDR, " ];
         jmp [", JMP_ADDR_R, "];
     }"));
```

"String interpolation" more readable.
"String interpolation" easier to type.
"text()" syntax is highlighted,
Thanks for the correct keywords: "String interpolation" - this is 
what I'm looking for.

Is there a "string interpolation" solution?