This commit allows patterns like:
alt x { some(_) { ... } none { } }
without the '.' after none. The parser suspends judgment about
whether a bare ident is a tag or a new bound variable; instead,
the resolver disambiguates.
This means that any code after resolution that pattern-matches on
patterns needs to call pat_util::normalize_pat, which consults
an environment to do this disambiguation.
In addition, local variables are no longer allowed to shadow
tag names, so this required changing some code (e.g. renaming
variables named "mut", and renaming ast::sub to subtract).
The parser currently accepts patterns with and without the '.'.
Once the compiler and libraries are changed, it will no longer
accept the '.'.
The (temporary) syntax is
iface seq<T> {
fn len() -> uint;
fn iter(f: block(T));
}
// The 'blah<T>' can be left of to default the name of the
// impl to seq<T>. The 'of seq<T>' can be left off when
// not implementing a named interface.
impl blah<T> of seq<T> for [T] {
fn len() -> uint { vec::len(self) }
fn iter(f: block(T)) { for x in self { f(x); } }
}
Something will still have to be done to the AST to make it possible to
say `x.foo::<int>()`, since currently field access never allows type
parameters.
Issue #1227
Move the name of the bundle to the front, allow type parameters (not
handled yet), and add a 'for' keyword:
impl utils for int {
fn str() -> str { int::str(self) }
fn times(f: block()) { ... }
}
Get rid of expr_self_call, introduces def_self. `self` is now,
syntactically, simply a variable. A method implicitly brings a `self`
binding into scope.
Issue #1227
See src/test/run-pass/nested-patterns.rs for some examples. The syntax is
boundvar@subpattern
Which will match the subpattern as usual, but also bind boundvar to the
whole matched value.
Closes#838
Also shuffles around the organization of numeric literals and types,
separating by int/uint/float instead of machine-vs-non-machine types.
This simplifies some code.
Closes#974Closes#1252
The path information was an optional "filename" component of crate
directive AST. It is now replaced by an attribute with metadata named
"path".
With this commit, a directive
mod foo = "foo.rs";
should be written as:
#[path = "foo.rs"]
mod foo;
Closes issue #906.
The reference now has an empty hole where the auth keyword used to be.
Changing the keyword table seems to require manually sorting the
keywords and putting them back into some kind of arcane interleaved
order. I'll open an issue to actually fix this.
Closes#1211
This makes it possible to omit the semicolon after the block, and will
cause the pretty-printer to properly print such calls (if
pretty-printing of blocks wasn't so broken). Block calls (with the
block outside of the parentheses) can now only occur at statement
level, and their value can not be used. When calling a block-style
function that returns a useful value, the block must be put insde the
parentheses.
Issue #1054
