6965fe4bce
I believe this patch incorporates all expected syntax changes from extern function reform (#3678). You can now write things like: extern "<abi>" fn foo(s: S) -> T { ... } extern "<abi>" mod { ... } extern "<abi>" fn(S) -> T The ABI for foreign functions is taken from this syntax (rather than from an annotation). We support the full ABI specification I described on the mailing list. The correct ABI is chosen based on the target architecture. Calls by pointer to C functions are not yet supported, and the Rust type of crust fns is still *u8.
67 lines
1.7 KiB
Rust
67 lines
1.7 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// Issue #2303
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mod rusti {
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#[abi = "rust-intrinsic"]
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pub extern "rust-intrinsic" {
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pub fn pref_align_of<T>() -> uint;
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pub fn min_align_of<T>() -> uint;
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}
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}
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// This is the type with the questionable alignment
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struct Inner {
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c64: u32
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}
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// This is the type that contains the type with the
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// questionable alignment, for testing
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struct Outer {
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c8: u8,
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t: Inner
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}
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#[cfg(target_arch = "x86")]
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mod m {
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pub fn align() -> uint { 4u }
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pub fn size() -> uint { 8u }
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}
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#[cfg(target_arch = "x86_64")]
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mod m {
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pub fn align() -> uint { 4u }
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pub fn size() -> uint { 8u }
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}
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pub fn main() {
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unsafe {
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let x = Outer {c8: 22u8, t: Inner {c64: 44u32}};
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// Send it through the shape code
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let y = fmt!("%?", x);
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debug!("align inner = %?", rusti::min_align_of::<Inner>());
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debug!("size outer = %?", sys::size_of::<Outer>());
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debug!("y = %s", y);
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// per clang/gcc the alignment of `inner` is 4 on x86.
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assert!(rusti::min_align_of::<Inner>() == m::align());
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// per clang/gcc the size of `outer` should be 12
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// because `inner`s alignment was 4.
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assert!(sys::size_of::<Outer>() == m::size());
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assert!(y == ~"{c8: 22, t: {c64: 44}}");
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}
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}
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