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digitalmars.D - Compile time XML Parser?

reply Kaitlyn Emmons <katemmons0 gmail.com> writes:
Is there one in existence?

-Kaitlyn
Feb 04
next sibling parent reply Adam D. Ruppe <destructionator gmail.com> writes:
On Wednesday, 5 February 2020 at 01:43:24 UTC, Kaitlyn Emmons 
wrote:
 Is there one in existence?
Most ordinary xml D parser can run at compile time. I've tested my dom.d with it and it parses successfully, though several actual manipulations cause the compiler to crash [!]. import arsd.dom; string translate(string xml) { auto document = new Document(xml, true, true); foreach(p; document.querySelectorAll("p")) p.removeAllChildren(); // this worked at least //p.innerText = "compile time"; // crashed! //p.addClass("paragraph"); // crashed! return document.toString(); } // with the `enum` keyword, it runs the function at compile-time enum e = translate("<xml><p>cool</p></xml>"); void main() { pragma(msg, e); // and this prints the result as it compiles }
Feb 04
parent reply Kaitlyn Emmons <katemmons0 gmail.com> writes:
On Wednesday, 5 February 2020 at 01:51:07 UTC, Adam D. Ruppe 
wrote:
 On Wednesday, 5 February 2020 at 01:43:24 UTC, Kaitlyn Emmons 
 wrote:
 Is there one in existence?
Most ordinary xml D parser can run at compile time. I've tested my dom.d with it and it parses successfully, though several actual manipulations cause the compiler to crash [!]. import arsd.dom; string translate(string xml) { auto document = new Document(xml, true, true); foreach(p; document.querySelectorAll("p")) p.removeAllChildren(); // this worked at least //p.innerText = "compile time"; // crashed! //p.addClass("paragraph"); // crashed! return document.toString(); } // with the `enum` keyword, it runs the function at compile-time enum e = translate("<xml><p>cool</p></xml>"); void main() { pragma(msg, e); // and this prints the result as it compiles }
It crash from manipulation but does it ever crash just parse and read? I dont need manipulation, just parse and read. Going to try parse and auto generate a VK binding from VKapi.xml that krhonos releases :) But it is big and complex xml so need stable parser.
Feb 04
parent reply Adam D. Ruppe <destructionator gmail.com> writes:
On Wednesday, 5 February 2020 at 02:06:58 UTC, Kaitlyn Emmons 
wrote:
 It crash from manipulation but does it ever crash just parse 
 and read?
Not for me but I almost always just do it at runtime; the compile time isn't as well tested. (I've only done little things with it at CT) But the same principle should apply to the other D xml parsers so maybe one of them will be better.
 to try parse and auto generate a VK binding from VKapi.xml that 
 krhonos releases :) But it is big and complex xml so need 
 stable parser.
You might be better off doing it at run time anyway - write a program to load the xml and generate it as a separate step in your build process. With a CT binding, every single build is going to have to reparse all the xml and regenerate the binding and the compile time function executor in the compiler is kinda slow.
Feb 04
parent reply Kaitlyn Emmons <katemmons0 gmail.com> writes:
On Wednesday, 5 February 2020 at 02:20:00 UTC, Adam D. Ruppe 
wrote:
 On Wednesday, 5 February 2020 at 02:06:58 UTC, Kaitlyn Emmons 
 wrote:
 It crash from manipulation but does it ever crash just parse 
 and read?
Not for me but I almost always just do it at runtime; the compile time isn't as well tested. (I've only done little things with it at CT) But the same principle should apply to the other D xml parsers so maybe one of them will be better.
 to try parse and auto generate a VK binding from VKapi.xml 
 that krhonos releases :) But it is big and complex xml so need 
 stable parser.
You might be better off doing it at run time anyway - write a program to load the xml and generate it as a separate step in your build process. With a CT binding, every single build is going to have to reparse all the xml and regenerate the binding and the compile time function executor in the compiler is kinda slow.
simple build process > fast build process .. not gana fuck with two step build system who got time for that... not me lol... also if it is separate module and does not import other modules, shouldn't rdmd recognize it doesnt need recompilation if the xml and module dont change?
Feb 04
parent Adam D. Ruppe <destructionator gmail.com> writes:
On Wednesday, 5 February 2020 at 04:37:34 UTC, Kaitlyn Emmons 
wrote:
 simple build process > fast build process
hah yeah i know how you feel. Though I want BOTH! The good news is almost all your code would actually be the same thanks to CTFE calling ordinary functions. So if you change your mind, you can change like `mixin(generate())` to `file.write(generate())` and otherwise basically keep it the same. So an easy decision to change your mind on if needs be in the future.
 modules, shouldn't rdmd recognize it doesnt need recompilation 
 if the xml and module dont change?
rdmd only caches the end result, not intermediaries. But other builds can do it... just at the cost of some of that simplicity.
Feb 05
prev sibling parent Jonathan M Davis <newsgroup.d jmdavisprog.com> writes:
On Tuesday, February 4, 2020 6:43:24 PM MST Kaitlyn Emmons via Digitalmars-d 
wrote:
 Is there one in existence?
I believe that dxml works at compile-time, since IIRC, after I gave my talk on it, someone created a PR to make the few changes necessary to make it work at compile-time: http://code.dlang.org/packages/dxml I haven't ever used it at compile-time myself though. - Jonathan M Davis
Feb 04