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librustc: Make the compiler ignore purity.

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For bootstrapping purposes, this commit does not remove all uses of
the keyword "pure" -- doing so would cause the compiler to no longer
bootstrap due to some syntax extensions ("deriving" in particular).
Instead, it makes the compiler ignore "pure". Post-snapshot, we can
remove "pure" from the language.

There are quite a few (~100) borrow check errors that were essentially
all the result of mutable fields or partial borrows of `@mut`. Per
discussions with Niko I think we want to allow partial borrows of
`@mut` but detect obvious footguns. We should also improve the error
message when `@mut` is erroneously reborrowed.
This commit is contained in:
Patrick Walton 2013-03-16 11:11:31 -07:00
parent c4db4faefa
commit e78f2e2ac5
72 changed files with 373 additions and 540 deletions
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12
src/libcore/ptr.rs
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@ -223,8 +223,8 @@ pub unsafe fn array_each<T>(arr: **T, cb: &fn(*T)) {
}
pub trait Ptr<T> {
pure fn is_null(&self) -> bool;
pure fn is_not_null(&self) -> bool;
pure fn is_null(&const self) -> bool;
pure fn is_not_null(&const self) -> bool;
pure fn offset(&self, count: uint) -> Self;
}
@ -232,11 +232,11 @@ pub trait Ptr<T> {
impl<T> Ptr<T> for *T {
/// Returns true if the pointer is equal to the null pointer.
#[inline(always)]
pure fn is_null(&self) -> bool { is_null(*self) }
pure fn is_null(&const self) -> bool { is_null(*self) }
/// Returns true if the pointer is not equal to the null pointer.
#[inline(always)]
pure fn is_not_null(&self) -> bool { is_not_null(*self) }
pure fn is_not_null(&const self) -> bool { is_not_null(*self) }
/// Calculates the offset from a pointer.
#[inline(always)]
@ -247,11 +247,11 @@ impl<T> Ptr<T> for *T {
impl<T> Ptr<T> for *mut T {
/// Returns true if the pointer is equal to the null pointer.
#[inline(always)]
pure fn is_null(&self) -> bool { is_null(*self) }
pure fn is_null(&const self) -> bool { is_null(*self) }
/// Returns true if the pointer is not equal to the null pointer.
#[inline(always)]
pure fn is_not_null(&self) -> bool { is_not_null(*self) }
pure fn is_not_null(&const self) -> bool { is_not_null(*self) }
/// Calculates the offset from a mutable pointer.
#[inline(always)]