mirror of https://github.com/rust-lang/rust
47 lines
1.4 KiB
Rust
47 lines
1.4 KiB
Rust
//@ revisions: noopt opt opt_with_overflow_checks
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//@[noopt]compile-flags: -C opt-level=0
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//@[opt]compile-flags: -O
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//@[opt_with_overflow_checks]compile-flags: -C overflow-checks=on -O
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#![crate_type="lib"]
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pub trait Foo {
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const NEG: i32;
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const NEG_REV: i32;
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const ADD: i32;
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const ADD_REV: i32;
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const DIV: i32;
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const DIV_REV: i32;
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const OOB: i32;
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const OOB_REV: i32;
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}
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// These constants cannot be evaluated already (they depend on `T::N`), so they can just be linted
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// like normal run-time code. But codegen works a bit different in const context, so this test
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// makes sure that we still catch overflow. Also make sure we emit the same lints if we reverse the
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// operands (so that the generic operand comes first).
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impl<T: Foo> Foo for Vec<T> {
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const NEG: i32 = -i32::MIN + T::NEG;
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//~^ ERROR arithmetic operation will overflow
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const NEG_REV: i32 = T::NEG + (-i32::MIN);
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//~^ ERROR arithmetic operation will overflow
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const ADD: i32 = (i32::MAX+1) + T::ADD;
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//~^ ERROR arithmetic operation will overflow
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const ADD_REV: i32 = T::ADD + (i32::MAX+1);
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//~^ ERROR arithmetic operation will overflow
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const DIV: i32 = (1/0) + T::DIV;
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//~^ ERROR operation will panic
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const DIV_REV: i32 = T::DIV + (1/0);
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//~^ ERROR operation will panic
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const OOB: i32 = [1][1] + T::OOB;
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//~^ ERROR operation will panic
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const OOB_REV: i32 = T::OOB + [1][1];
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//~^ ERROR operation will panic
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}
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