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97 lines
4.5 KiB
Objective-C
97 lines
4.5 KiB
Objective-C
//
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// FLEXMethod.h
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// FLEX
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//
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// Derived from MirrorKit.
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// Created by Tanner on 6/30/15.
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// Copyright (c) 2020 FLEX Team. All rights reserved.
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//
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#import "FLEXRuntimeConstants.h"
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#import "FLEXMethodBase.h"
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NS_ASSUME_NONNULL_BEGIN
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/// A class representing a concrete method which already exists in a class.
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/// This class contains helper methods for swizzling or invoking the method.
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///
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/// Any of the initializers will return nil if the type encoding
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/// of the method is unsupported by `NSMethodSignature`. In general,
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/// any method whose return type or parameters involve a struct with
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/// bitfields or arrays is unsupported.
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///
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/// I do not remember why I didn't include \c signature in the base class
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/// when I originally wrote this, but I probably had a good reason. We can
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/// always go back and move it to \c FLEXMethodBase if we find we need to.
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@interface FLEXMethod : FLEXMethodBase
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/// Defaults to instance method
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+ (nullable instancetype)method:(Method)method;
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+ (nullable instancetype)method:(Method)method isInstanceMethod:(BOOL)isInstanceMethod;
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/// Constructs an \c FLEXMethod for the given method on the given class.
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/// @param cls the class, or metaclass if this is a class method
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/// @return The newly constructed \c FLEXMethod object, or \c nil if the
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/// specified class or its superclasses do not contain a method with the specified selector.
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+ (nullable instancetype)selector:(SEL)selector class:(Class)cls;
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/// Constructs an \c FLEXMethod for the given method on the given class,
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/// only if the given class itself defines or overrides the desired method.
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/// @param cls the class, or metaclass if this is a class method
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/// @return The newly constructed \c FLEXMethod object, or \c nil \e if the
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/// specified class does not define or override, or if the specified class
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/// or its superclasses do not contain, a method with the specified selector.
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+ (nullable instancetype)selector:(SEL)selector implementedInClass:(Class)cls;
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@property (nonatomic, readonly) Method objc_method;
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/// The implementation of the method.
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/// @discussion Setting \c implementation will change the implementation of this method
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/// for the entire class which implements said method. It will also not modify the selector of said method.
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@property (nonatomic ) IMP implementation;
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/// Whether the method is an instance method or not.
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@property (nonatomic, readonly) BOOL isInstanceMethod;
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/// The number of arguments to the method.
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@property (nonatomic, readonly) NSUInteger numberOfArguments;
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/// The \c NSMethodSignature object corresponding to the method's type encoding.
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@property (nonatomic, readonly) NSMethodSignature *signature;
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/// Same as \e typeEncoding but with parameter sizes up front and offsets after the types.
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@property (nonatomic, readonly) NSString *signatureString;
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/// The return type of the method.
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@property (nonatomic, readonly) FLEXTypeEncoding *returnType;
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/// The return size of the method.
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@property (nonatomic, readonly) NSUInteger returnSize;
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/// The full path of the image that contains this method definition,
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/// or \c nil if this ivar was probably defined at runtime.
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@property (nonatomic, readonly) NSString *imagePath;
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/// Like @code - (void)foo:(int)bar @endcode
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@property (nonatomic, readonly) NSString *description;
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/// Like @code -[Class foo:] @endcode
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- (NSString *)debugNameGivenClassName:(NSString *)name;
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/// Swizzles the recieving method with the given method.
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- (void)swapImplementations:(FLEXMethod *)method;
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#define FLEXMagicNumber 0xdeadbeef
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#define FLEXArg(expr) FLEXMagicNumber,/// @encode(__typeof__(expr)), (__typeof__(expr) []){ expr }
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/// Sends a message to \e target, and returns it's value, or \c nil if not applicable.
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/// @discussion You may send any message with this method. Primitive return values will be wrapped
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/// in instances of \c NSNumber and \c NSValue. \c void and bitfield returning methods return \c nil.
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/// \c SEL return types are converted to strings using \c NSStringFromSelector.
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/// @return The object returned by this method, or an instance of \c NSValue or \c NSNumber containing
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/// the primitive return type, or a string for \c SEL return types.
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- (id)sendMessage:(id)target, ...;
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/// Used internally by \c sendMessage:target,. Pass \c NULL to the first parameter for void methods.
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- (void)getReturnValue:(void *)retPtr forMessageSend:(id)target, ...;
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@end
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@interface FLEXMethod (Comparison)
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- (NSComparisonResult)compare:(FLEXMethod *)method;
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@end
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NS_ASSUME_NONNULL_END
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