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80 lines
3.4 KiB
Rust
80 lines
3.4 KiB
Rust
//! Regression test for both the original regression in #59418 where invalid suffixes in indexing
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//! positions were accidentally accepted, and also for the removal of the temporary carve out that
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//! mitigated ecosystem impact following trying to reject #59418 (this was implemented as a FCW
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//! tracked in #60210).
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//!
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//! Check that we hard error on invalid suffixes in tuple indexing subexpressions and struct numeral
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//! field names.
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struct X(i32,i32,i32);
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fn main() {
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let tup_struct = X(1, 2, 3);
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let invalid_tup_struct_suffix = tup_struct.0suffix;
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//~^ ERROR suffixes on a tuple index are invalid
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let previous_carve_out_tup_struct_suffix = tup_struct.0i32;
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//~^ ERROR suffixes on a tuple index are invalid
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let tup = (1, 2, 3);
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let invalid_tup_suffix = tup.0suffix;
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//~^ ERROR suffixes on a tuple index are invalid
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let previous_carve_out_tup_suffix = tup.0u32;
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//~^ ERROR suffixes on a tuple index are invalid
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numeral_struct_field_name_suffix_invalid();
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numeral_struct_field_name_suffix_previous_carve_out();
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}
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// Previously, there were very limited carve outs as a ecosystem impact mitigation implemented in
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// #60186. *Only* `{i,u}{32,usize}` suffixes were temporarily accepted. Now, they all hard error.
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fn previous_carve_outs() {
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// Previously temporarily accepted by a pseudo-FCW (#60210), now hard error.
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let previous_carve_out_i32 = (42,).0i32; //~ ERROR suffixes on a tuple index are invalid
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let previous_carve_out_i32 = (42,).0u32; //~ ERROR suffixes on a tuple index are invalid
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let previous_carve_out_isize = (42,).0isize; //~ ERROR suffixes on a tuple index are invalid
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let previous_carve_out_usize = (42,).0usize; //~ ERROR suffixes on a tuple index are invalid
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// Not part of the carve outs!
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let error_i8 = (42,).0i8; //~ ERROR suffixes on a tuple index are invalid
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let error_u8 = (42,).0u8; //~ ERROR suffixes on a tuple index are invalid
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let error_i16 = (42,).0i16; //~ ERROR suffixes on a tuple index are invalid
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let error_u16 = (42,).0u16; //~ ERROR suffixes on a tuple index are invalid
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let error_i64 = (42,).0i64; //~ ERROR suffixes on a tuple index are invalid
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let error_u64 = (42,).0u64; //~ ERROR suffixes on a tuple index are invalid
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let error_i128 = (42,).0i128; //~ ERROR suffixes on a tuple index are invalid
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let error_u128 = (42,).0u128; //~ ERROR suffixes on a tuple index are invalid
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}
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fn numeral_struct_field_name_suffix_invalid() {
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let invalid_struct_name = X { 0suffix: 0, 1: 1, 2: 2 };
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//~^ ERROR suffixes on a tuple index are invalid
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match invalid_struct_name {
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X { 0suffix: _, .. } => {}
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//~^ ERROR suffixes on a tuple index are invalid
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}
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}
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fn numeral_struct_field_name_suffix_previous_carve_out() {
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let carve_out_struct_name = X { 0u32: 0, 1: 1, 2: 2 };
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//~^ ERROR suffixes on a tuple index are invalid
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match carve_out_struct_name {
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X { 0u32: _, .. } => {}
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//~^ ERROR suffixes on a tuple index are invalid
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}
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}
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// Unfortunately, it turns out `std::mem::offset_of!` uses the same expect suffix code path.
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fn offset_of_suffix() {
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#[repr(C)]
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pub struct Struct<T>(u8, T);
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// Previous pseudo-FCW carve outs
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assert_eq!(std::mem::offset_of!(Struct<u32>, 0usize), 0);
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//~^ ERROR suffixes on a tuple index are invalid
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// Not part of carve outs
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assert_eq!(std::mem::offset_of!(Struct<u32>, 0u8), 0);
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//~^ ERROR suffixes on a tuple index are invalid
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}
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