mirror of https://github.com/rust-lang/rust
44 lines
996 B
Rust
44 lines
996 B
Rust
#[repr(C)]
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struct ReallyBig {
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_a: [u8; usize::MAX],
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}
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// The limit for "too big for the current architecture" is dependent on the target pointer size
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// however it's artificially limited on 64 bits
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// logic copied from rustc_target::abi::TargetDataLayout::obj_size_bound()
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const fn max_size() -> usize {
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#[cfg(target_pointer_width = "16")]
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{
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1 << 15
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}
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#[cfg(target_pointer_width = "32")]
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{
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1 << 31
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}
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#[cfg(target_pointer_width = "64")]
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{
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1 << 47
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}
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#[cfg(not(any(
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target_pointer_width = "16",
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target_pointer_width = "32",
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target_pointer_width = "64"
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)))]
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{
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isize::MAX as usize
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}
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}
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extern "C" {
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static FOO: [u8; 1];
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static BAR: [u8; max_size() - 1];
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static BAZ: [u8; max_size()]; //~ ERROR extern static is too large
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static UWU: [usize; usize::MAX]; //~ ERROR extern static is too large
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static A: ReallyBig; //~ ERROR extern static is too large
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}
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fn main() {}
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