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804cce47d9
Instead of parsing the different components of a function signature, eagerly look for either the `where` keyword or the function body. - Also address feedback to use `From` instead of `TryFrom` in cranelift contract and ubcheck codegen.
53 lines
1.5 KiB
Rust
53 lines
1.5 KiB
Rust
//! Checks for compilation errors related to adding contracts to non-function items.
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#![feature(rustc_contracts)]
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#![allow(dead_code)]
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#[core::contracts::requires(true)]
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//~^ ERROR contract annotations can only be used on functions
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struct Dummy(usize);
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#[core::contracts::ensures(|v| v == 100)]
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//~^ ERROR contract annotations can only be used on functions
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const MAX_VAL: usize = 100;
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// FIXME: Improve the error message here. The macro thinks this is a function.
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#[core::contracts::ensures(|v| v == 100)]
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//~^ ERROR contract annotations is only supported in functions with bodies
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type NewDummy = fn(usize) -> Dummy;
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#[core::contracts::ensures(|v| v == 100)]
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//~^ ERROR contract annotations is only supported in functions with bodies
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const NEW_DUMMY_FN : fn(usize) -> Dummy = || { Dummy(0) };
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#[core::contracts::requires(true)]
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//~^ ERROR contract annotations can only be used on functions
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impl Dummy {
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// This should work
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#[core::contracts::ensures(|ret| ret.0 == v)]
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fn new(v: usize) -> Dummy {
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Dummy(v)
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}
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}
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#[core::contracts::ensures(|dummy| dummy.0 > 0)]
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//~^ ERROR contract annotations can only be used on functions
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impl From<usize> for Dummy {
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// This should work.
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#[core::contracts::ensures(|ret| ret.0 == v)]
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fn from(value: usize) -> Self {
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Dummy::new(value)
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}
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}
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/// You should not be able to annotate a trait either.
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#[core::contracts::requires(true)]
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//~^ ERROR contract annotations can only be used on functions
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pub trait DummyBuilder {
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fn build() -> Dummy;
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}
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fn main() {
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}
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