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json/tree: add type enum and value queries

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This commit is contained in:
Danny Robson 2015-03-18 15:47:16 +11:00
parent 5e20ee3a1d
commit b01635141f
1 changed files with 24 additions and 0 deletions
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24
json/tree.hpp
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@ -33,6 +33,14 @@
#include "./fwd.hpp"
namespace json { namespace tree {
enum type_t {
OBJECT,
ARRAY,
STRING,
NUMBER,
BOOLEAN,
NONE
};
/// Parse an encoded form of JSON into a tree structure
extern std::unique_ptr<node> parse (const boost::filesystem::path &path);
@ -66,6 +74,8 @@ namespace json { namespace tree {
virtual bool is_boolean (void) const { return false; }
virtual bool is_null (void) const { return false; }
virtual type_t type (void) const = 0;
virtual bool operator==(const node &rhs) const = 0;
virtual bool operator!=(const node &rhs) const;
virtual bool operator==(const object &) const { return false; }
@ -102,6 +112,8 @@ namespace json { namespace tree {
virtual const object& as_object (void) const { return *this; }
virtual bool is_object (void) const { return true; }
virtual type_t type (void) const { return OBJECT; }
virtual bool operator==(const object &rhs) const;
virtual bool operator==(const node &rhs) const
{ return rhs == *this; }
@ -139,6 +151,8 @@ namespace json { namespace tree {
virtual const array& as_array (void) const { return *this; }
virtual bool is_array (void) const { return true; }
virtual type_t type (void) const { return ARRAY; }
virtual bool operator==(const array &rhs) const;
virtual bool operator==(const node &rhs) const
{ return rhs == *this; }
@ -172,6 +186,9 @@ namespace json { namespace tree {
virtual const string& as_string (void) const { return *this; }
virtual bool is_string (void) const { return true; }
virtual type_t type (void) const { return STRING; }
virtual bool operator==(const char *rhs) const;
virtual bool operator==(const string &rhs) const;
virtual bool operator==(const node &rhs) const
@ -199,6 +216,9 @@ namespace json { namespace tree {
virtual const number& as_number (void) const { return *this; }
virtual bool is_number (void) const { return true; }
virtual type_t type (void) const { return NUMBER; }
virtual bool operator==(const number &rhs) const;
virtual bool operator==(const node &rhs) const
{ return rhs == *this; }
@ -221,6 +241,9 @@ namespace json { namespace tree {
virtual const boolean& as_boolean (void) const { return *this; }
virtual bool is_boolean (void) const { return true; }
virtual type_t type (void) const { return BOOLEAN; }
virtual bool operator==(const boolean &rhs) const;
virtual bool operator==(const node &rhs) const
{ return rhs == *this; }
@ -235,6 +258,7 @@ namespace json { namespace tree {
/// Represents a JSON null value.
class null final : public node {
public:
virtual type_t type (void) const { return NONE; }
virtual std::unique_ptr<node> clone (void) const;
virtual bool operator==(const null&) const { return true; }