39 lines
2.3 KiB
Plaintext
39 lines
2.3 KiB
Plaintext
`-Wno-protocol'
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If a class is declared to implement a protocol, a warning is
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issued for every method in the protocol that is not implemented by
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the class. The default behavior is to issue a warning for every
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method not explicitly implemented in the class, even if a method
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implementation is inherited from the superclass. If you use the
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`-Wno-protocol' option, then methods inherited from the superclass
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are considered to be implemented, and no warning is issued for
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them.
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`-Wselector'
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Warn if multiple methods of different types for the same selector
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are found during compilation. The check is performed on the list
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of methods in the final stage of compilation. Additionally, a
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check is performed for each selector appearing in a
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`@selector(...)' expression, and a corresponding method for that
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selector has been found during compilation. Because these checks
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scan the method table only at the end of compilation, these
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warnings are not produced if the final stage of compilation is not
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reached, for example because an error is found during compilation,
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or because the `-fsyntax-only' option is being used.
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`-Wstrict-selector-match'
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Warn if multiple methods with differing argument and/or return
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types are found for a given selector when attempting to send a
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message using this selector to a receiver of type `id' or `Class'.
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When this flag is off (which is the default behavior), the
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compiler will omit such warnings if any differences found are
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confined to types which share the same size and alignment.
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`-Wundeclared-selector'
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Warn if a `@selector(...)' expression referring to an undeclared
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selector is found. A selector is considered undeclared if no
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method with that name has been declared before the
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`@selector(...)' expression, either explicitly in an `@interface'
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or `@protocol' declaration, or implicitly in an `@implementation'
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section. This option always performs its checks as soon as a
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`@selector(...)' expression is found, while `-Wselector' only
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performs its checks in the final stage of compilation. This also
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enforces the coding style convention that methods and selectors
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must be declared before being used.
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