RFRuntime.h

/*!
    RFRuntime
    RFKit

    Copyright (c) 2012-2013 BB9z
    https://github.com/bb9z/RFKit

    The MIT License (MIT)
    http://www.opensource.org/licenses/mit-license.php
 */

#pragma mark - Macro options for Debug
// If DEBUG is true and NDEBUG is not defined, define RFDEBUG 1, else 0.
#ifndef RFDEBUG
#   if DEBUG && !defined(NDEBUG)
#       define RFDEBUG 1
#   else
#       define RFDEBUG 0
#   endif
#endif

/** @enum RFDebugLevel
 Used to change debug behave.
 */
enum {
    // Silent.
    RFDebugLevelSilent = 0,
    
    // Default, won't log anything. For production environment.
    RFDebugLevelFatal = 1,
    RFDebugLevelDefault = RFDebugLevelFatal,
    
    // Debug mode, show error. Enable log output. Assert enable.
    RFDebugLevelError = 2,
    
    // Show warning.
    RFDebugLevelWarning = 3,
    
    RFDebugLevelInfo = 4,
    RFDebugLevelVerbose = 5
};

#ifndef RFDebugLevel
#   if RFDEBUG
#       define RFDebugLevel RFDebugLevelError
#   else
#       define RFDebugLevel RFDebugLevelFatal
#   endif
#endif


#pragma mark - Headers
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

#import "dout.h"
#import "RFARC.h"
#import "RFDispatch.h"
#import "RFFeatureSupport.h"

#pragma mark - ObjC Ext
#import "metamacros.h"
#import "EXTKeyPathCoding.h"
#import "EXTScope.h"

/**
 \@keypathClassInstance allows compile-time verification of key paths. Similar to
 \@keypath, but accept a class as parameter instead of a instance variable.
 @code

NSString *objectIDPath = @keypathClassInstance(NSManagedObject, objectID);
// => @"objectID"

NSString *footerViewFramePath = @keypathClassInstance(UITableView, tableFooterView, frame);
// => @"frame"

 @endcode
 
 @bug In a class method, cannot use `self` as CLASS.
 */

#define keypathClassInstance(...)\
    metamacro_if_eq(2, metamacro_argcount(__VA_ARGS__))(keypathClassInstance1(__VA_ARGS__))(keypathClassInstance2(__VA_ARGS__))

#define keypathClassInstance1(CLASS, PATH)\
    (({CLASS *_proxy_; ((void)(NO && ((void)_proxy_.PATH, NO)), # PATH);}))

#define keypathClassInstance2(CLASS, PROPERTY, PATH)\
    (({CLASS *_proxy_; ((void)(NO && ((void)_proxy_.PROPERTY.PATH, NO)), # PATH);}))

#pragma mark - Language Addition

/** Define a const NSString
 
 @code
 
 RFDefineConstString(aaa);
 RFDefineConstString(bbb, "something");
 
 // Will be
 NSString *const aaa = @"aaa";
 NSString *const bbb = @"something";
 
 @endcode
 */
#define RFDefineConstString(...) metamacro_if_eq(1, metamacro_argcount(__VA_ARGS__))(_RFDefineConstString1(metamacro_at0(__VA_ARGS__)))(_RFDefineConstString2(metamacro_at0(__VA_ARGS__), metamacro_at1(__VA_ARGS__)))

#define _RFDefineConstString1(name) NSString *const name = @metamacro_stringify_(name)
#define _RFDefineConstString2(name, value) NSString *const name = @value