Setters and Getters apply to computed properties; such properties do not have storage in the instance – the value from the getter is meant to be computed from other instance properties. In your case, there is no x to be assigned. Explicitly: “How can I do this without explicit backing ivars”. You can’t – you’ll … Read more
You can’t. The manual for GCC 4.4.0 is only comprehensive for that version, but it does list all the possible warnings for 4.4.0. They’re not all on the page you link to though. For instance, some language-specific options are on the pages for C++ options or Objective-C options. To find them all, you’re better off … Read more
You are using a function for which the compiler has not seen a declaration (“prototype“) yet. For example: int main() { fun(2, “21”); /* The compiler has not seen the declaration. */ return 0; } int fun(int x, char *p) { /* … */ } You need to declare your function before main, like this, … Read more
It appears this can be done. I’m unable to determine the version of GCC that it was added, but it was sometime before June 2010. Here’s an example: #pragma GCC diagnostic error “-Wuninitialized” foo(a); /* error is given for this one */ #pragma GCC diagnostic push #pragma GCC diagnostic ignored “-Wuninitialized” foo(b); /* no diagnostic … Read more
For this lint warning, as for all other lint warnings, note that you can get a fuller explanation than just what is in the one line error message; you don’t have to search the web for more info. If you are using lint via Eclipse, either open the lint warnings view, where you can select … Read more
It depends on your IDE or compiler. Here is a list for Eclipse Galileo: all to suppress all warnings boxing to suppress warnings relative to boxing/unboxing operations cast to suppress warnings relative to cast operations dep-ann to suppress warnings relative to deprecated annotation deprecation to suppress warnings relative to deprecation fallthrough to suppress warnings relative … Read more
Why should I enable warnings? C and C++ compilers are notoriously bad at reporting some common programmer mistakes by default, such as: forgetting to initialise a variable forgetting to return a value from a function arguments in printf and scanf families not matching the format string a function is used without being declared beforehand (C … Read more
You can either: Add an allow attribute on a struct, module, function, etc.: #[allow(dead_code)] struct SemanticDirection; Add a crate-level allow attribute; notice the !: #![allow(dead_code)] Pass it to rustc: rustc -A dead_code main.rs Pass it using cargo via the RUSTFLAGS environment variable: RUSTFLAGS=”$RUSTFLAGS -A dead_code” cargo build