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30c0e4e72b
* ensuring that offset_of!(Self, ...) works iff inside an impl block * ensuring that the output type is usize and doesn't coerce. this can be changed in the future, but if it is done, it should be a conscious descision * improving the privacy checking test * ensuring that generics don't let you escape the unsized check
59 lines
1.3 KiB
Rust
59 lines
1.3 KiB
Rust
#![feature(offset_of)]
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use std::mem::offset_of;
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struct C<T> {
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v: T,
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w: T,
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}
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struct S {
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v: u8,
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w: u16,
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}
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impl S {
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fn v_offs() -> usize {
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offset_of!(Self, v)
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}
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fn v_offs_wrong_syntax() {
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offset_of!(Self, Self::v); //~ ERROR no rules expected the token `::`
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offset_of!(S, Self); //~ ERROR expected identifier, found keyword `Self`
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//~| no field `Self` on type `S`
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}
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fn offs_in_c() -> usize {
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offset_of!(C<Self>, w)
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}
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fn offs_in_c_colon() -> usize {
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offset_of!(C::<Self>, w)
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}
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}
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mod m {
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use std::mem::offset_of;
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fn off() {
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offset_of!(self::S, v); //~ ERROR cannot find type `S` in module
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offset_of!(super::S, v);
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offset_of!(crate::S, v);
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}
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impl super::n::T {
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fn v_offs_self() -> usize {
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offset_of!(Self, v) //~ ERROR field `v` of struct `T` is private
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}
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}
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}
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mod n {
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pub struct T { v: u8, }
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}
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fn main() {
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offset_of!(self::S, v);
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offset_of!(Self, v); //~ ERROR cannot find type `Self` in this scope
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offset_of!(S, self); //~ ERROR expected identifier, found keyword `self`
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//~| no field `self` on type `S`
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offset_of!(S, v.self); //~ ERROR expected identifier, found keyword `self`
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//~| no field `self` on type `u8`
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}
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