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digitalmars.D.learn - jsoniopipe - exaples?

reply Zz <zz zz.com> writes:
Hi,

Here are some samples from the std.json documentation.
Any idea on how to do something similar using jsoniopipe?

Directly copied from https://dlang.org/phobos/std_json.html

import std.conv : to;

// parse a file or string of json into a usable structure
string s = `{ "language": "D", "rating": 3.5, "code": "42" }`;
JSONValue j = parseJSON(s);
// j and j["language"] return JSONValue,
// j["language"].str returns a string
writeln(j["language"].str); // "D"
writeln(j["rating"].floating); // 3.5

// check a type
long x;
if (const(JSONValue)* code = "code" in j)
{
     if (code.type() == JSONType.integer)
         x = code.integer;
     else
         x = to!int(code.str);
}

// create a json struct
JSONValue jj = [ "language": "D" ];
// rating doesnt exist yet, so use .object to assign
jj.object["rating"] = JSONValue(3.5);
// create an array to assign to list
jj.object["list"] = JSONValue( ["a", "b", "c"] );
// list already exists, so .object optional
jj["list"].array ~= JSONValue("D");

string jjStr = 
`{"language":"D","list":["a","b","c","D"],"rating":3.5}`;
writeln(jj.toString); // jjStr


Regards,
Zz
Dec 29 2023
parent reply Steven Schveighoffer <schveiguy gmail.com> writes:
On Friday, 29 December 2023 at 08:09:58 UTC, Zz wrote:

 Hi,

 Here are some samples from the std.json documentation.
 Any idea on how to do something similar using jsoniopipe?

 Directly copied from https://dlang.org/phobos/std_json.html

 import std.conv : to;

 // parse a file or string of json into a usable structure
 string s = `{ "language": "D", "rating": 3.5, "code": "42" }`;
 JSONValue j = parseJSON(s);
 // j and j["language"] return JSONValue,
 // j["language"].str returns a string
 writeln(j["language"].str); // "D"
 writeln(j["rating"].floating); // 3.5

 // check a type
 long x;
 if (const(JSONValue)* code = "code" in j)
 {
     if (code.type() == JSONType.integer)
         x = code.integer;
     else
         x = to!int(code.str);
 }

 // create a json struct
 JSONValue jj = [ "language": "D" ];
 // rating doesnt exist yet, so use .object to assign
 jj.object["rating"] = JSONValue(3.5);
 // create an array to assign to list
 jj.object["list"] = JSONValue( ["a", "b", "c"] );
 // list already exists, so .object optional
 jj["list"].array ~= JSONValue("D");

 string jjStr = 
 `{"language":"D","list":["a","b","c","D"],"rating":3.5}`;
 writeln(jj.toString); // jjStr


jsoniopipe is not focused on the `JSONValue` 
[equivalent](https://github.com/schveiguy/jsoniopipe/blob/7d63a2e19ae46a1ae56ccab4c6c872bcce094286/source/iopipe/json/dom.d#L22)

You can see it's pretty basic and just serves as a "catch any 
type" thing.

It could easily be replaced with `std.json.JSONValue`, though I 
like the fact that it's templated on the string type.

The main focus of jsoniopipe is parsing and serialization -- I 
prefer to use real concrete structs/classes rather than variant 
types. In fact, the huge benefit from the library is that there 
is no intermediate type.

But yeah, I could ingest all the functionality from std.json 
there. Or maybe even just use `JSONValue` from std.json. Could 
you make an issue?

-Steve
Dec 29 2023
parent Zz <zz zz.com> writes:
On Saturday, 30 December 2023 at 01:30:22 UTC, Steven 
Schveighoffer wrote:

 On Friday, 29 December 2023 at 08:09:58 UTC, Zz wrote:

 But yeah, I could ingest all the functionality from std.json 
 there. Or maybe even just use `JSONValue` from std.json. Could 
 you make an issue?

 -Steve


Hi Steve,

It would be a welcome addition.

Regards,
Zz
Dec 30 2023