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| -rw-r--r-- | Notes/Quirks.md | 37 |
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diff --git a/Notes/Quirks.md b/Notes/Quirks.md new file mode 100644 index 00000000..258d095e --- /dev/null +++ b/Notes/Quirks.md @@ -0,0 +1,37 @@ + +Methods can be called on some "statement-like" expressions +==== + +https://github.com/rust-lang/rust/blob/master/src/libstd/sys/common/poison.rs#L172 +``` +fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + match *self { + TryLockError::Poisoned(..) => "poisoned lock: another task failed inside", + TryLockError::WouldBlock => "try_lock failed because the operation would block" + }.fmt(f) +} +``` + +Method call on a statement-like match + + +The `ident` fragment matches reserved words +=== + +Typically used for replacing `self` in macros. + + + +Any integer can cast to a pointer +=================== +This includes `u8` + + +Modules with the same name as primtiive types have interesting lookup quirks +=================== +- If a path like `u32::some_name` is seen, if the module `u32` exists in the current scope and `some_name` is an item in that module + - Treat the path as `self::u32::some_name` + - Otherwise, treat it as `<u32 as ?>::some_name` + + + |