Re: TIL: statically initializing an Associative Array
On Tuesday, 7 May 2024 at 01:14:24 UTC, Steven Schveighoffer wrote: On Tuesday, 7 May 2024 at 00:10:27 UTC, Andy Valencia wrote: I had a set of default error messages to go with error code numbers, and did something along the lines of: string[uint] error_text = [ 400: "A message", 401: "A different message" ]; and got "expression is not a constant" ... This was fixed [in 2.106.0](https://dlang.org/changelog/2.106.0.html#dmd.static-assoc-array) please upgrade your compiler. I'm using ldc2 from Debian stable; great news that it's fixed as of late 2023. I'll probably live with my workaround, but it's good to know that it's a bug which has been resolved. Thank you! Andy
Re: TIL: statically initializing an Associative Array
On Tuesday, 7 May 2024 at 00:10:27 UTC, Andy Valencia wrote: I had a set of default error messages to go with error code numbers, and did something along the lines of: string[uint] error_text = [ 400: "A message", 401: "A different message" ]; and got "expression is not a constant" I eventually found this discussion: https://issues.dlang.org/show_bug.cgi?id=6238 I understand that it's problematic, but a message which makes it clearer that compile-time initialization of global AA's are not supported? Because it cost me about a half hour trying to figure out what I was doing wrong. This error message was changed in 2.101.x (unsure which point release): ``` onlineapp.d(1): Error: static initializations of associative arrays is not allowed. onlineapp.d(1):associative arrays must be initialized at runtime: https://dlang.org/spec/hash-map.html#runtime_initialization ``` (My workaround was to initialize the data structure once during app startup.) This was fixed [in 2.106.0](https://dlang.org/changelog/2.106.0.html#dmd.static-assoc-array) please upgrade your compiler. -Steve
Re: TIL: statically initializing an Associative Array
On Tuesday, 7 May 2024 at 01:02:04 UTC, matheus wrote: On Tuesday, 7 May 2024 at 00:10:27 UTC, Andy Valencia wrote: ... Based on what I understood and that issue, I think it was fixed: ... By the way it works as immutable too. Matheus.
Re: TIL: statically initializing an Associative Array
On Tuesday, 7 May 2024 at 00:10:27 UTC, Andy Valencia wrote:
I had a set of default error messages to go with error code
numbers, and did something along the lines of:
string[uint] error_text = [
400: "A message",
401: "A different message"
];
and got "expression is not a constant"
I eventually found this discussion:
https://issues.dlang.org/show_bug.cgi?id=6238
I understand that it's problematic, but a message which makes
it clearer that compile-time initialization of global AA's are
not supported? Because it cost me about a half hour trying to
figure out what I was doing wrong.
(My workaround was to initialize the data structure once during
app startup.)
Based on what I understood and that issue, I think it was fixed:
import std.stdio;
string[uint] aa1 = [1:"ABC",2:"DEF"];
void main(){
auto aa2 = ['A':1,'B':2];
writeln(aa1[1]);
writeln(aa1[2]);
writeln(aa2['A']);
writeln(aa2['B']);
}
Prints:
ABC
DEF
1
2
Matheus.
TIL: statically initializing an Associative Array
I had a set of default error messages to go with error code numbers, and did something along the lines of: string[uint] error_text = [ 400: "A message", 401: "A different message" ]; and got "expression is not a constant" I eventually found this discussion: https://issues.dlang.org/show_bug.cgi?id=6238 I understand that it's problematic, but a message which makes it clearer that compile-time initialization of global AA's are not supported? Because it cost me about a half hour trying to figure out what I was doing wrong. (My workaround was to initialize the data structure once during app startup.)
