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2952 Commits

Author SHA1 Message Date
Tim Chevalier
fa74df033d Add a constraint on trans::type_of_fn_from_ty 
And change callers appropriately.
 2011-09-16 13:07:08 -07:00
Tim Chevalier
0d4b51d10d Add a returns_non_ty_var predicate 
which just calls non_ty_var on the return type of t, assuming t is
a function type.
 2011-09-16 13:06:31 -07:00
Tim Chevalier
1b2c5c4c9b Make ty_fn_ret pure and get rid of a duplicate function 2011-09-16 13:06:31 -07:00
Marijn Haverbeke
43b219dbec Work around an apparent compiler bug to make my patch run 
Without this, it would fail when optimization is turned on. The result of
the Load(bcx, llclosure) call would end up in llenv in a corrupted form.
 2011-09-16 21:31:36 +02:00
Marijn Haverbeke
575aae407b Saner approach to lvalues and callable values in trans 
LValues no longer carry information about generics and objs, instead
there's an extended form of lvalue, lval_maybe_callee, only used by
call and bind, which holds this info.

This makes it possible to take the value of a method and get a working
closure, and will (with some more work) allow us to call statically
known functions without loading from their pair.

Closes #435
Closes #758
 2011-09-16 21:31:36 +02:00
Tim Chevalier
172df2e3a2 Add non_ty_var precondition for type_of_fn, plus minor cleanup 2011-09-16 10:58:02 -07:00
Marijn Haverbeke
ad470d741e Revert "Saner approach to lvalues and callable values in trans" 
This reverts commit 66153436c9.
 2011-09-16 18:37:46 +02:00
Marijn Haverbeke
133d36f452 Require body of else-less if expressions to be a value-less block 
For consistency with other constructs that could not possibly return a
value (say, loops).
 2011-09-16 18:21:06 +02:00
Marijn Haverbeke
66153436c9 Saner approach to lvalues and callable values in trans 
LValues no longer carry information about generics and objs, instead
there's an extended form of lvalue, lval_maybe_callee, only used by
call and bind, which holds this info.

This makes it possible to take the value of a method and get a working
closure, and will (with some more work) allow us to call statically
known functions without loading from their pair.

Closes #435
Closes #758
 2011-09-16 18:21:05 +02:00
Marijn Haverbeke
639d88a693 Move expr_uniq case in trans to a saner place 
Note that unique pointers are still broken in more ways than I can count.
 2011-09-16 15:03:03 +02:00
Marijn Haverbeke
f8a35234ad Remove autoderef for calls 
We were only using it in a single place, and there for no discernable reason
(probably as part of the bare-fn-vals-are-not-copyable plan). It seems more
surprising than useful.
 2011-09-16 14:39:30 +02:00
Marijn Haverbeke
c04490d97b Remove unused method_ty field from lval_result 2011-09-16 14:18:49 +02:00
Marijn Haverbeke
fb42d839a0 Clean up (and optimize) root-mutability analysis in alias.rs 2011-09-16 13:46:03 +02:00
Marijn Haverbeke
d7587c1eda Change convention for specifying referenced argument 
It is now 1-based, rather than 0 based. (Seems more natural, and allows 0 to
be used to refer to self and maybe to closure.)

Also allows non-referenced args to be implicitly copied again.

Issue #918
 2011-09-16 12:42:18 +02:00
Tim Chevalier
059b31f7a3 Actually call unreachable() in impossible case in type_of_inner 2011-09-15 23:22:12 -07:00
Tim Chevalier
57ede5f281 Added non_ty_var precondition to trans::type_of_inner 
This allows us to legitimately call unreachable() in the ty_var case.
 2011-09-15 23:22:12 -07:00
Jesse Ruderman
ce1877dc8e Add parens, as needed, around else-if conditions. 2011-09-15 21:24:24 -07:00
Tim Chevalier
2c6eba00dd Added an extra check in trans_alt 
Gratuitous right now, but I'm going to change the type of trans::type_of
 2011-09-15 20:32:01 -07:00
Tim Chevalier
f41f75fe53 Added more predicates in trans 
Added the non_ty_var predicate (soon to be used)
Added a check in get_res_dtor (will be necessary for a future change
to type_of_fn)
Removed a gratuitous ret
 2011-09-15 20:23:06 -07:00
Tim Chevalier
059952da5b Change a few span_fatals to span_err 2011-09-15 19:51:27 -07:00
Graydon Hoare
1e3e7d4bc5 Update README slightly. 2011-09-15 16:31:33 -07:00
Marijn Haverbeke
7364a8c2b0 Prevent binary expressions from parsing when lhs is non-value block 2011-09-15 17:37:10 +02:00
Marijn Haverbeke
b843cf2117 Generalize expression roots in alias analysis 
This allows calls-returning-a-reference to count as expression roots,
making it possible to return the result of such a call by reference.

Issue #918
 2011-09-15 17:01:35 +02:00
Marijn Haverbeke
3abe3671bd Require the parameter that will be referenced to be noted 
Issue #918
 2011-09-15 16:15:17 +02:00
Marijn Haverbeke
75eee8b194 Overhaul alias-checking of blocks 
The set of active bindings has to be updated as by-reference locals are
encountered.

Issue #918
 2011-09-15 15:43:15 +02:00
Marijn Haverbeke
87fa38910e Make storing returned references in a by-reference local work 
fn f(a: {x: str}) -> &str {
        ret a.x;
    }

    fn main() {
        let x = {x: "hi"};
        let &y = f(x); // Look ma, no copy!
        log_err y;
    }

Issue #918.
 2011-09-15 15:17:14 +02:00
Marijn Haverbeke
25787bd2b8 Forbid assignment to by-reference bindings 
Issue #918
 2011-09-15 14:08:54 +02:00
Marijn Haverbeke
d7a1d6a1cb Make trans understand by-ref bindings 
Issue #918
 2011-09-15 14:00:58 +02:00
Marijn Haverbeke
8aad16112b Implement basic checking of by-reference bindings 
Issue #918
 2011-09-15 13:40:28 +02:00
Marijn Haverbeke
44c6370e6a Move local numbering into ast_map.rs 
This further simplifies the alias pass, which is sorely needed.
 2011-09-15 13:18:32 +02:00
Marijn Haverbeke
1cda74deee Add representation for by-ref let bindings 
Issue #918
 2011-09-15 11:42:56 +02:00
Marijn Haverbeke
197f360e30 Ensure parens are wrapped around composite exprs in call/index/field pos 
This is needed to fix the second example in issue #919
 2011-09-15 11:15:14 +02:00
Marijn Haverbeke
8c83ea564b More thorough check for (.. 10).x in pretty-printer 
Closes #919
 2011-09-15 10:59:06 +02:00
Marijn Haverbeke
63ecc84562 Also handle fail and put in print_maybe_parens_discrim 
Closes #920
 2011-09-15 10:14:52 +02:00
Marijn Haverbeke
3798b6f780 Remove maybe_protect_block kludge from pretty-printer 
It is no longer needed.
 2011-09-15 10:14:52 +02:00
Marijn Haverbeke
0b34e0e60b Introduce new semicolon rules 
- Loop bodies and resource constructors aren't allowed to have
  trailing expressions anymore.

- An expression that ends* in a block without trailing expression can
  can not be called, indexed, or subscripted.

- Only expression-statements that end* in a block without trailing
  expression can omit their semicolon.

*) 'Ending in a trailing expression' is defined as being a block or
   construct-ending-in-a-block (if, alt) that either ends in an
   expression itself, or ends in another block-like expression that
   has a trailing expression (by these same rules).
 2011-09-15 09:49:00 +02:00
Marijn Haverbeke
7298b8f4ba Insert omitted semicolons for statements 2011-09-15 09:49:00 +02:00
Brian Anderson
31d4fe37f6 Revert "Try a little harder to avoid creating new landing pads" 
This reverts commit b8e31ac469.

Conflicts:

	src/comp/middle/trans.rs
 2011-09-14 09:19:31 -07:00
Marijn Haverbeke
93de2f0b74 Add syntax and representation for return-by-mutably-rooted-ref 
This will be used in the near future to decide what can safely
be done with the returned reference.

Issue #918
 2011-09-14 17:30:38 +02:00
Marijn Haverbeke
1cabe37155 Prevent memory errors when returning references to temp args. 
Issue #918
 2011-09-14 16:46:54 +02:00
Marijn Haverbeke
c6619f9ce0 Accept returning refs rooted in an arg from a by-ref funtion 
Issue #918
 2011-09-14 16:19:15 +02:00
Marijn Haverbeke
a3c449df74 Make ast_map.rs index function args, switch it over to simple_visitor 2011-09-14 15:30:59 +02:00
Marijn Haverbeke
cd0e7fc041 Remove some extra white-space introduced by the pretty-printer 2011-09-14 15:20:22 +02:00
Marijn Haverbeke
7d69712dee Disallow implicit arg copying when the function returns a ref 
Issue #918
 2011-09-14 14:57:20 +02:00
Marijn Haverbeke
93d2a4f82a Add support for basic return-by-alias to trans 
Issue #918
 2011-09-14 14:39:08 +02:00
Marijn Haverbeke
9a69ee79e0 Clean up trans_obj.rs a bit 
As a preparation to adding an arg to type_of_fn_full
 2011-09-14 13:49:22 +02:00
Marijn Haverbeke
6cd24173d4 Add a ret_style field to fn_ctxt in trans 2011-09-14 13:48:51 +02:00
Marijn Haverbeke
2aac43d809 Simplify trans::new_fn_ctxt_w_id 
It was still living in the pre-decent-type-inference era.
 2011-09-14 13:26:39 +02:00
Marijn Haverbeke
0699acb6f7 Rudimentary checking of safe alias returns 2011-09-14 13:09:45 +02:00
Marijn Haverbeke
63519d9006 Rename restrict to binding in alias.rs 
Its role gradually changed to the point where the old name doesn't
really make sense anymore.
 2011-09-14 12:06:51 +02:00
Marijn Haverbeke
44df041799 Stop needlessly boxing vectors in alias.rs 2011-09-14 11:37:52 +02:00
Marijn Haverbeke
51dae63c44 Make most of the compiler aware of return-by-reference 
tyencode/tydecode still don't know about it. return_ref will be extended to take
arguments anyway.
 2011-09-14 11:31:05 +02:00
Marijn Haverbeke
c1c083cd66 Refactor parse_ret_ty, start parsing by-alias return specs 2011-09-14 10:46:40 +02:00
Marijn Haverbeke
6eb9738a66 Rename ast::controlflow to ast::ret_style 
It will include information about returning by alias.
 2011-09-14 10:38:23 +02:00
Josh Matthews
f6fe07d1f3 Add support for negative literals. 2011-09-14 00:47:14 -04:00
Brian Anderson
6d3dd0e48c Try harder still to generate fewer landing pads 
Scopes that don't have cleanups don't need their own landing pads

This takes the optimized rustc bin from 4.7MB to 4.4
 2011-09-13 16:52:12 -07:00
Brian Anderson
b8e31ac469 Try a little harder to avoid creating new landing pads 
It's only when we add or revoke cleanups involving immediates that we need a
new landing pad for the scope.

Trims 5K off the optimized rustc bin
 2011-09-13 16:52:12 -07:00
Brian Anderson
74c39469be Reuse landing pads when possible 
Cuts the optimized rustc bin from 5.2 to 4.7MB
 2011-09-13 16:52:12 -07:00
Michael Sullivan
c84b8e90b8 Print something when we can't figure out a tag name. Mitigates #876. 2011-09-13 13:14:49 -04:00
Marijn Haverbeke
b9267e8fbc Add missing cases for machine floats in shape.rs 2011-09-13 17:46:28 +02:00
Marijn Haverbeke
577d6dd602 Improve lexing of float literals 
Closes #575
 2011-09-13 17:43:01 +02:00
Marijn Haverbeke
f72573cce8 Properly pretty-print 10.x 
Closes #890
 2011-09-13 17:08:59 +02:00
Marijn Haverbeke
e64e9792ab Make pretty-printer wrap fail/ret/put in parens in call/index/field pos 
Closes #764
Closes #891
 2011-09-13 17:02:36 +02:00
Marijn Haverbeke
bc62b17543 Ensure that the declared type and actual type of a constant agree 
Closes #899
 2011-09-13 16:29:23 +02:00
Marijn Haverbeke
be5537e95f Be more strict about what constitutes a block expression 
Blocks (or statements involving blocks) that end in a semicolon are no
longer considered the block-expression of their outer block. This used
to be an expression block, but now is a statement block:

    { if foo { ret 1; } else { ret 10; } }

This helps clear up some ambiguities in our grammar.
 2011-09-13 15:50:03 +02:00
Marijn Haverbeke
e945164879 Always warn when implicitly copying a generic type 2011-09-13 13:40:38 +02:00
Marijn Haverbeke
38e86d708b Properly alias-check bindings in for-each loops 2011-09-13 13:34:08 +02:00
Marijn Haverbeke
45bdff01b2 Clean up copy bookkeeping in alias.rs 2011-09-13 13:23:32 +02:00
Marijn Haverbeke
2f402343c9 Make for loop alias-safe 2011-09-13 13:05:59 +02:00
Marijn Haverbeke
3e92f90952 Apply implicit copying for unsafe references to alt patterns 2011-09-13 12:23:36 +02:00
Graydon Hoare
7f94957721 Kill trailing whitespace. 2011-09-12 16:33:43 -07:00
Graydon Hoare
a4815b6742 Factor imports mindlessly. 2011-09-12 16:13:28 -07:00
Brian Anderson
393deeb06f Merge branch 'unwind' 
Conflicts:
	src/comp/middle/trans.rs
	src/comp/middle/trans_build.rs
	src/lib/run_program.rs
	src/test/compiletest/runtest.rs
 2011-09-12 09:36:51 -07:00
Marijn Haverbeke
edde2e0c45 Undo some pretty-printer damage in ty.rs 2011-09-12 14:43:41 +02:00
Marijn Haverbeke
982a1a4783 Rename alias to reference in docs and error messages 
Update docs to reflect new approach to aliases
 2011-09-12 14:24:46 +02:00
Marijn Haverbeke
bcf60c6600 Warn when inserting an implicit copy that may be expensive 2011-09-12 13:54:02 +02:00
Marijn Haverbeke
8dd46d4384 Properly implement copy expressions 
(And use them in some places that were doing {expr} before.)
 2011-09-12 13:13:20 +02:00
Marijn Haverbeke
f4b6264f8c Remove backwards-compatibility with old arg-mode syntax 2011-09-12 12:49:00 +02:00
Marijn Haverbeke
ca1df2b111 Pretty-print for new arg-mode syntax 2011-09-12 12:49:00 +02:00
Marijn Haverbeke
bfa021de0d Switch pretty-printer to new arg-mode syntax 2011-09-12 12:48:59 +02:00
Marijn Haverbeke
3667137a41 Accept {|| ... } for argument-less block syntax 
Closes #880
 2011-09-12 12:04:41 +02:00
Marijn Haverbeke
fc6b7c8b38 Reformat for new mode syntax, step 1 
Long lines were fixed in a very crude way, as I'll be following up
with another reformat in a bit.
 2011-09-12 12:04:14 +02:00
Marijn Haverbeke
0e6e56ca60 Make the names of the arg mode tag reflect their (revised) meaning 2011-09-12 11:07:17 +02:00
Marijn Haverbeke
4be7e1e5cd Pass all arguments by reference, make immut alias mode equiv to value 
Arguments that can't be safely referenced will be implicitly copied.

(Warnings for expensive copies will be forthcoming.)

This will allow us to get rid of most of the ampersands in function
signatures. See [1].

[1] https://mail.mozilla.org/pipermail/rust-dev/2011-September/000759.html
 2011-09-12 11:06:54 +02:00
Brian Anderson
d267e7486e Zero locals when the initializer might call a function 
The function might fail, leaving the local uninitialized

Issue #236
 2011-09-11 17:31:40 -07:00
Brian Anderson
118194381c Invoke put functions 
Issue #236
 2011-09-11 17:31:40 -07:00
Brian Anderson
53f7d6119a Add some FIXMEs about unwinding implementation 
Issue #236
 2011-09-11 17:31:39 -07:00
Brian Anderson
4fba02c7e9 Invoke upcall_fail 
This allows landing pads to be generated around fail statements

Issue #236
 2011-09-11 17:31:38 -07:00
Brian Anderson
4c9eee8aa4 Run cleanups during unwinding 
Issue #236
 2011-09-11 17:31:38 -07:00
Brian Anderson
587b863772 Zero locals that have initializers that might fail 
This will avoid running cleanups on uninitialized memory

Issue #236
 2011-09-11 17:31:38 -07:00
Brian Anderson
4eb3ce3280 Add landing pads to invokes 
Issue #236
 2011-09-11 17:31:38 -07:00
Brian Anderson
5e4637b61f Add Rust definitions for new LLVM EH instructions 
Issue #236
 2011-09-11 17:31:38 -07:00
Brian Anderson
4bced5e5f2 Use invoke to call (most) rust functions 
No landing pads yet.

Issue #236
 2011-09-11 17:31:38 -07:00
Brian Anderson
9f4b4d89ce Add upcall_rust_personality 
This just wraps __gxx_personality_v0 with our upcall naming convention

Issue #236
 2011-09-11 17:31:38 -07:00
Jesse Ruderman
476bbca87a Fuzzer: move tys around in addition to exprs 2011-09-10 18:55:09 -07:00
Jesse Ruderman
7182054416 Add missing arm, so pretty-printing the statement 'copy 1;' does not die. 2011-09-09 21:27:07 -07:00
Jesse Ruderman
8e00161819 Make the pretty printer disambiguatae blocks followed by vec expressions. 
Semicolons are needed here now that postfix [] is used for vec indexing (the syntax change made in rev 518dc52f85).
 2011-09-09 19:47:40 -07:00
Marijn Haverbeke
db15591d89 Revert "Make for loops alias the vec elements, rather than copy them" 
This reverts commit 985ef59efd.
 2011-09-09 16:53:45 +02:00
Marijn Haverbeke
3ac59b0ee0 Get rid of vp2i in object field access 
Closes #557
 2011-09-09 15:53:10 +02:00
Marijn Haverbeke
985ef59efd Make for loops alias the vec elements, rather than copy them 
The alias analysis was already assuming that it worked like this.
 2011-09-09 15:34:13 +02:00