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Subteam report: lang 2016-04-08

Highlights

We decided to accept the following RFCs this week:

  • RFC 1494: Amend RFC 550 with misc. follow set corrections
  • RFC 1444: Untagged unions
  • RFC 1513: Stabilize implementing panics as aborts
  • RFC 1398: Allocators, take III

We also placed the following RFCs into FCP:

  • RFC 1429: feature gate extern fn methods
  • RFC 1440: allow drop types in statics/constants
  • RFC 1399: add #[repr(pack = N)]

-- nmatsakis

Dashboard

RFC phase

  • PR #197: ManuallyDrop type gives precise control of dtors of inline data.
  • PR #1180: Propose Interior<T> data-type, to allow moves out of the dropped value during the drop hook.
  • PR #1248: Safe intrinsics RFC
  • PR #1296: RFC: Add an alias attribute to #[link] and -l
  • PR #1305: Abstract output type parameters
  • PR #1327: Dropck Eyepatch RFC.
  • PR #1358: RFC: Add #[repr(align = "N")]
  • PR #1379: Change thread local variables to only accept async-signal-safe types.
  • PR #1406: Rfc: delegation of implementation
  • PR #1408: Delayed resolution
  • PR #1414: Add Rvalue-static-promotion RFC
  • PR #1426: Placement in/box refinement
  • PR #1431: Statically dispatched methods for trait objects with associated data
  • PR #1449: Add language support for bitfields
  • PR #1450: Types for enum variants
  • PR #1459: Add a used attribute
  • PR #1477: Generic atomic v2
  • PR #1478: translate undefined intrinsics to an unreachable and a lint
  • PR #1492: RFC: .. in patterns
  • PR #1504: Add support for 128-bit integers
  • PR #1506: Clarify the relationships between various kinds of structs and variants
  • PR #1517: RFC: Exclude macros from importing with #[macro_use(not(...))]
  • PR #1521: Copy clone semantics
  • PR #1522: Minimal impl Trait
  • PR #1524: Custom Dynamically Sized Types for Rust
  • PR #1546: Allow fields in traits that map to lvalues in impl'ing type
  • PR #1548: Add global_asm! for module-level inline assembly
  • PR #1558: RFC: Allow coercing non-capturing closures to function pointers.
  • PR #1559: RFC: Allow all literals in attributes
  • PR #1560: Changes to name resolution
  • PR #1561: Macro naming and modularisation
  • PR #1563: Add #![cfg_assert]
  • PR #1566: Procedural macros
  • PR #1575: Add a vis matcher to macro_rules!.
  • FCP PR #1319: Amend RFC1228 with operator fixity and precedence
  • FCP PR #1373: Remove some kinds of doc comments
  • FCP PR #1399: RFC: Add #[repr(pack = "N")]
  • FCP PR #1429: Feature gate extern fn methods
  • FCP PR #1440: RFC - Allow Drop types in statics/const functions

Implementation phase

High priority issues

  • Issue #25860: Implied bounds on nested references + variance = soundness hole
  • Issue #28514: Private trait's methods reachable through a public subtrait
  • Issue #29149: Lifetime bounds in Copy impls are ignored
  • Issue #29859: Cyclic traits allow arbitrary traits to be synthesized
  • Issue #30127: Desugared x.index(y) is not equivalent to x[y]
  • Issue #31287: Pattern guard can consume value that is being matched
  • Issue #31543: Warn for type parameter defaults on impl blocks
  • Issue #32655: Macro expansion bypasses #[derive_*] stability checks.

Needs decision

  • Issue #21232: borrow-checker allows partial reinit of struct that has been moved away, but no use of it.
  • Issue #23818: print! macro should flush stdout
  • Issue #30191: Can't provide non-overlapping impls with any type parameters, if a blanket impl exists
  • Issue #32655: Macro expansion bypasses #[derive_*] stability checks.
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