Ticket #1491 (assigned enhancement)

Opened 4 years ago

Last modified 4 years ago

new JSON parser implementation

Reported by:	mwarning	Assigned to:	kris (accepted)
Priority:	major	Milestone:	2.0
Component:	Tango	Version:	0.99.7 Dominik
Keywords:		Cc:

Description (Last modified by mandel)

I wrote a new JSON parser in hope to replace the current implementation with a better one.

Features:

fast
query chaining
custom allocators
can handle single quoted strings (template parameter)
can handle comments (template parameter)
fixes json tickets #1283, #1274, #1252 (sort of)
unittests

Use case:

auto pa = new JsonParser!();
auto root = pa.parseObject(`{ "a":{"a" : 0.1e23, "b" : [true, false, null]}}`);

alias builder.JsonString JsonString;
alias builder.JsonObject JsonObject;
alias builder.JsonValue JsonValue;

auto obj = new JsonObject();

obj["array"] = [cast(char[]) "a" : cast(uint[]) [1,2,3], "b" : [42]];
obj["string"] = "abc";
obj["number"] = 42.1234;
obj["bools"] = [true, false];
obj["numbers"] = [3, 1234567890];
obj["numbers"] ~= [42, 128];
obj["one bool"] = true;
obj["object"] = root;

assert(obj["array"]["b"][0] == 42);
assert(obj["string"] == "abc");
assert(obj["number"] == 42.1234);
assert(obj["string"].toString == "abc");
assert(obj["number"].toFloat == 42.1234);

if(obj["array"]["b"][0].ptr) { /* item exists */ }
if(!obj["array"]["21"][42][0].ptr) { /* item does not exist */ }

obj.print((char[] str){ /* Stdout(str); */ }, true); //formatted ouput
obj.print((char[] str){ /* Stdout(str); */ }, false); //compact output

foreach(char[] key, JsonValue val; obj)
{
	if(key == "integers")
	{
		uint[] integers = val.to!(uint[]);
		assert(integers == ia_test);
	}
}

The implementation consist of:

JsonParser.d
JsonBuilder.d
JsonEscape.d, the one from Tango
JsonAdditional.d, simple costum allocators and linked list containers

Change History

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Ticket #1491 (assigned enhancement)

new JSON parser implementation

Description (Last modified by mandel)

Change History

02/18/09 19:09:08 changed by mandel

02/18/09 19:13:10 changed by mandel

02/18/09 19:14:36 changed by mandel

02/19/09 04:19:49 changed by larsivi

02/22/09 12:29:28 changed by mandel

03/01/09 20:15:07 changed by mandel

03/02/09 11:56:38 changed by mandel

03/29/09 09:31:22 changed by larsivi

09/09/09 06:39:29 changed by mwarning

11/13/09 17:14:44 changed by kris

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