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std.json code samples

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This commit is contained in:
Andy Colson 2015-01-21 20:11:04 -06:00
parent 02be4bdd55
commit 925b329ffb
1 changed files with 55 additions and 3 deletions
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58
std/json.d
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@ -3,6 +3,38 @@
/** /**
JavaScript Object Notation JavaScript Object Notation
Synopsis:
----
//parse a file or string of json into a usable structure
string s = "{ \"language\": \"D\", \"rating\": 3.14, \"code\": \"42\" }";
JSONValue j = parseJSON(s)
writeln("Language: ", j["language"].str(), " Rating: ", j["rating"].floating());
// j and j["language"] return JSONValue, j["language"].str() returns a string
//check a type
long x;
if (j["code"].type() == JSON_TYPE.INTEGER) {
x = j["code"].integer;
} else {
x = to!int(j["code"].str());
}
// create a json struct
JSONValue jj = [ "language": "D" ];
// rating doesnt exist yet, so use .object to assign
jj.object["rating"] = JSONValue(3.14);
// create an array to assign to list
jj.object["list"] = JSONValue( ["a", "b", "c"] );
// list already exists, so .object optional
j["list"].array ~= JSONValue("D");
s = j.toString();
writeln(s);
----
Copyright: Copyright Jeremie Pelletier 2008 - 2009. Copyright: Copyright Jeremie Pelletier 2008 - 2009.
License: $(WEB www.boost.org/LICENSE_1_0.txt, Boost License 1.0). License: $(WEB www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
Authors: Jeremie Pelletier, David Herberth Authors: Jeremie Pelletier, David Herberth
@ -58,7 +90,16 @@ struct JSONValue
private Store store; private Store store;
private JSON_TYPE type_tag; private JSON_TYPE type_tag;
/// Specifies the _type of the value stored in this structure. /**
Returns the JSON_TYPE of the value stored in this structure.
Example:
---
string j = "{ \"language\": \"D\" }";
JSONValue j = parseJSON(s);
// j.type() == JSON_TYPE.OBJECT
// j["language"].type() == JSON_TYPE.STRING
---
*/
@property JSON_TYPE type() const @property JSON_TYPE type() const
{ {
return type_tag; return type_tag;
@ -107,8 +148,19 @@ struct JSONValue
return type_tag = newType; return type_tag = newType;
} }
/// Value getter/setter for $(D JSON_TYPE.STRING). /** Value getter/setter for $(D JSON_TYPE.STRING).
/// Throws $(D JSONException) for read access if $(D type) is not $(D JSON_TYPE.STRING). Throws $(D JSONException) for read access if $(D type) is not $(D JSON_TYPE.STRING).
Example:
---
JSONValue j = [ "language": "D" ];
// get value
string s = j["language"].str();
// change existing key to new string
j["language"].str("Perl");
---
*/
@property inout(string) str() inout @property inout(string) str() inout
{ {
enforce!JSONException(type == JSON_TYPE.STRING, enforce!JSONException(type == JSON_TYPE.STRING,