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32 Commits

Author SHA1 Message Date
Tim Chevalier
c3bc8fada8 Allow omission of the '.' after nullary tag patterns 
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 '.'.
 2012-01-17 10:08:16 -08:00
Marijn Haverbeke
efb9df1ebd Make driver::session::session no longer an object 
Rather, it is now a struct where properties like opts are accessed
directly, and the error-reporting methods are part of a static impl
(with the same name as the type).
 2012-01-12 18:04:02 +01:00
Brian Anderson
26db74c811 rustc: Box the vectors returned from ty::tag_variants 2011-12-15 17:14:58 -08:00
Graydon Hoare
fa9ad984fb Copy first batch of material from libstd to libcore. 2011-12-13 16:34:50 -08:00
Marijn Haverbeke
9a269a3aa8 Allow binding of nested patterns 
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
 2011-12-08 12:03:48 +01:00
Marijn Haverbeke
64ce092c27 Allow literal patterns to contain arbitrary literal expressions 
This removes the need for the unary minus hacks, and allows some other
neat things like matching on 1 >> 4.

Issue #954
 2011-12-02 13:42:51 +01:00
Marijn Haverbeke
5d6a74f020 Only warn about unreachable range patterns when appropriate 
Also simplifies the literal-munging, and moves it into ast_util

Closes #1170
 2011-11-22 11:49:29 +01:00
Niko Matsakis
adc79e2f44 remove compile-command from local variable blocks 2011-11-17 11:46:13 -08:00
Marijn Haverbeke
f9fbd86f52 Parse and typecheck by-value and by-ref arg specs 
Add sprinkle && throughout the compiler to make it typecheck again.

Issue #1008
 2011-10-07 09:09:50 +02:00
Brian Anderson
381205b747 Revert "Revert "Implement pattern ranges for all numeric types."" 
This reverts commit a034f87146.

Conflicts:

	src/comp/middle/check_alt.rs
	src/comp/middle/trans_alt.rs
	src/comp/syntax/ast.rs
	src/comp/syntax/ast_util.rs
	src/comp/syntax/fold.rs
	src/comp/syntax/print/pprust.rs

Conflicts:

	src/comp/middle/trans_alt.rs
 2011-09-28 12:46:29 -07:00
Brian Anderson
d8f6e9f237 Add let destructuring for unique boxes 
Issue #409
 2011-09-23 16:12:04 -07:00
Brian Anderson
2082f67765 Begin to support pattern matching on unique boxes 
Issue #409
 2011-09-23 15:15:30 -07:00
Marijn Haverbeke
a034f87146 Revert "Implement pattern ranges for all numeric types." 
This reverts commit ce0f054f9d.
 2011-09-21 18:42:09 +02:00
Josh Matthews
ce0f054f9d Implement pattern ranges for all numeric types. 2011-09-21 09:36:12 +02:00
Graydon Hoare
a4815b6742 Factor imports mindlessly. 2011-09-12 16:13:28 -07:00
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
Brian Anderson
5c49e4f4e9 Reformat. Issue #855 2011-09-02 22:11:42 -07:00
Brian Anderson
9857048929 Convert rustc::driver::session to istrs. Issue #855 2011-08-27 16:47:50 -07:00
Brian Anderson
152cbaade7 Move functions from syntax::ast to syntax::ast_util 
This leaves syntax::ast just defining the AST, which strikes me as somewhat
nicer
 2011-08-22 10:44:04 -07:00
Marijn Haverbeke
7d08678b74 Implement pattern guards 
The syntax is

    alt x {
        mypat where mycond { ... }
    }

The condition may refer to any of the variables bound by the pattern.
When a guard fails, pattern-matching continues with the next pattern.

Closes #857
 2011-08-22 17:49:31 +02:00
Brian Anderson
518dc52f85 Reformat 
This changes the indexing syntax from .() to [], the vector syntax from ~[] to
[] and the extension syntax from #fmt() to #fmt[]
 2011-08-20 11:04:00 -07:00
Erick Tryzelaar
af21a27002 Port the compiler to the expr foo::<T> syntax. 2011-08-16 15:05:56 -07:00
Erick Tryzelaar
e4a0f997fb Port the compiler to the typaram foo<T> syntax. 2011-08-16 15:05:56 -07:00
Brian Anderson
f05a91a0dc Rename std::ivec to std::vec 2011-08-16 10:36:19 -07:00
Lindsey Kuper
f91351aaf6 The wonky for...in... whitespace was bothering me. Sorry! 2011-08-15 22:19:50 -07:00
Paul Stansifer
ebb16e6a25 Use span stacks to track macro expansion for less troublesome error messages. 2011-08-15 15:35:28 -07:00
Paul Stansifer
c48036c0b7 Make spans into stacks (to store expansion backtraces). 2011-08-15 15:35:27 -07:00
Marijn Haverbeke
3f127e397f Add tuple patterns 2011-08-15 13:20:16 +02:00
Erick Tryzelaar
8b15045224 Port the compiler to the ivec type [T] syntax. 2011-08-09 15:53:26 -07:00
Marijn Haverbeke
92240eb25b Add check for irrefutable patterns in destructuring locals 2011-08-01 17:52:43 +02:00
Marijn Haverbeke
df7f21db09 Reformat for new syntax 2011-07-27 15:54:33 +02:00
Marijn Haverbeke
beab6ba8aa Add a pass that checks for unreachable alt arms 2011-07-25 13:52:59 +02:00