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Add more context to the literal overflow message

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This commit is contained in:
YI 2020-03-14 11:57:04 +08:00
parent e5e8ba4edc
commit a4ffbaadc8
10 changed files with 107 additions and 11 deletions
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44
src/librustc_lint/types.rs
View File

@ -165,7 +165,7 @@ fn report_bin_hex_error(
let mut err = lint.build(&format!("literal out of range for {}", t));
err.note(&format!(
"the literal `{}` (decimal `{}`) does not fit into \
an `{}` and will become `{}{}`",
the type `{}` and will become `{}{}`",
repr_str, val, t, actually, t
));
if let Some(sugg_ty) = get_type_suggestion(&cx.tables.node_type(expr.hir_id), val, negative)
@ -242,7 +242,7 @@ fn lint_int_literal<'a, 'tcx>(
v: u128,
) {
let int_type = t.normalize(cx.sess().target.ptr_width);
let (_, max) = int_ty_range(int_type);
let (min, max) = int_ty_range(int_type);
let max = max as u128;
let negative = type_limits.negated_expr_id == e.hir_id;
@ -267,7 +267,19 @@ fn lint_int_literal<'a, 'tcx>(
}
cx.struct_span_lint(OVERFLOWING_LITERALS, e.span, |lint| {
lint.build(&format!("literal out of range for `{}`", t.name_str())).emit()
lint.build(&format!("literal out of range for `{}`", t.name_str()))
.note(&format!(
"the literal `{}` does not fit into the type `{}` whose range is `{}..={}`",
cx.sess()
.source_map()
.span_to_snippet(lit.span)
.ok()
.expect("must get snippet from literal"),
t.name_str(),
min,
max,
))
.emit();
});
}
}
@ -320,7 +332,19 @@ fn lint_uint_literal<'a, 'tcx>(
return;
}
cx.struct_span_lint(OVERFLOWING_LITERALS, e.span, |lint| {
lint.build(&format!("literal out of range for `{}`", t.name_str())).emit()
lint.build(&format!("literal out of range for `{}`", t.name_str()))
.note(&format!(
"the literal `{}` does not fit into the type `{}` whose range is `{}..={}`",
cx.sess()
.source_map()
.span_to_snippet(lit.span)
.ok()
.expect("must get snippet from literal"),
t.name_str(),
min,
max,
))
.emit()
});
}
}
@ -352,7 +376,17 @@ fn lint_literal<'a, 'tcx>(
};
if is_infinite == Ok(true) {
cx.struct_span_lint(OVERFLOWING_LITERALS, e.span, |lint| {
lint.build(&format!("literal out of range for `{}`", t.name_str())).emit()
lint.build(&format!("literal out of range for `{}`", t.name_str()))
.note(&format!(
"the literal `{}` does not fit into the type `{}` and will be converted to `std::{}::INFINITY`",
cx.sess()
.source_map()
.span_to_snippet(lit.span)
.expect("must get snippet from literal"),
t.name_str(),
t.name_str(),
))
.emit();
});
}
}

7
src/test/ui/enum/enum-discrim-too-small2.stderr
View File

@ -9,24 +9,31 @@ note: the lint level is defined here
|
LL | #![deny(overflowing_literals)]
| ^^^^^^^^^^^^^^^^^^^^
= note: the literal `223` does not fit into the type `i8` whose range is `-128..=127`
error: literal out of range for `i16`
--> $DIR/enum-discrim-too-small2.rs:15:12
|
LL | Ci16 = 55555,
| ^^^^^
|
= note: the literal `55555` does not fit into the type `i16` whose range is `-32768..=32767`
error: literal out of range for `i32`
--> $DIR/enum-discrim-too-small2.rs:22:12
|
LL | Ci32 = 3_000_000_000,
| ^^^^^^^^^^^^^
|
= note: the literal `3_000_000_000` does not fit into the type `i32` whose range is `-2147483648..=2147483647`
error: literal out of range for `i64`
--> $DIR/enum-discrim-too-small2.rs:29:12
|
LL | Ci64 = 9223372036854775809,
| ^^^^^^^^^^^^^^^^^^^
|
= note: the literal `9223372036854775809` does not fit into the type `i64` whose range is `-9223372036854775808..=9223372036854775807`
error: aborting due to 4 previous errors

1
src/test/ui/issues/issue-63364.stderr
View File

@ -5,6 +5,7 @@ LL | for n in 100_000.. {
| ^^^^^^^
|
= note: `#[deny(overflowing_literals)]` on by default
= note: the literal `100_000` does not fit into the type `u16` whose range is `0..=65535`
error: aborting due to previous error

1
src/test/ui/lint/deny-overflowing-literals.stderr
View File

@ -5,6 +5,7 @@ LL | let x: u8 = 256;
| ^^^
|
= note: `#[deny(overflowing_literals)]` on by default
= note: the literal `256` does not fit into the type `u8` whose range is `0..=255`
error: range endpoint is out of range for `u8`
--> $DIR/deny-overflowing-literals.rs:5:14

6
src/test/ui/lint/lint-range-endpoint-overflow.stderr
View File

@ -15,18 +15,24 @@ error: literal out of range for `u8`
|
LL | let range_c = 0..=256;
| ^^^
|
= note: the literal `256` does not fit into the type `u8` whose range is `0..=255`
error: literal out of range for `u8`
--> $DIR/lint-range-endpoint-overflow.rs:7:19
|
LL | let range_d = 256..5;
| ^^^
|
= note: the literal `256` does not fit into the type `u8` whose range is `0..=255`
error: literal out of range for `u8`
--> $DIR/lint-range-endpoint-overflow.rs:8:22
|
LL | let range_e = 0..257;
| ^^^
|
= note: the literal `257` does not fit into the type `u8` whose range is `0..=255`
error: range endpoint is out of range for `u8`
--> $DIR/lint-range-endpoint-overflow.rs:9:20

1
src/test/ui/lint/lint-type-limits2.stderr
View File

@ -17,6 +17,7 @@ note: the lint level is defined here
|
LL | #![warn(overflowing_literals)]
| ^^^^^^^^^^^^^^^^^^^^
= note: the literal `128` does not fit into the type `i8` whose range is `-128..=127`
error: aborting due to previous error

1
src/test/ui/lint/lint-type-limits3.stderr
View File

@ -17,6 +17,7 @@ note: the lint level is defined here
|
LL | #![warn(overflowing_literals)]
| ^^^^^^^^^^^^^^^^^^^^
= note: the literal `200` does not fit into the type `i8` whose range is `-128..=127`
error: aborting due to previous error

35
src/test/ui/lint/lint-type-overflow.stderr
View File

@ -9,108 +9,143 @@ note: the lint level is defined here
|
LL | #![deny(overflowing_literals)]
| ^^^^^^^^^^^^^^^^^^^^
= note: the literal `256` does not fit into the type `u8` whose range is `0..=255`
error: literal out of range for `u8`
--> $DIR/lint-type-overflow.rs:13:14
|
LL | let x1 = 256_u8;
| ^^^^^^
|
= note: the literal `256_u8` does not fit into the type `u8` whose range is `0..=255`
error: literal out of range for `i8`
--> $DIR/lint-type-overflow.rs:16:18
|
LL | let x1: i8 = 128;
| ^^^
|
= note: the literal `128` does not fit into the type `i8` whose range is `-128..=127`
error: literal out of range for `i8`
--> $DIR/lint-type-overflow.rs:18:19
|
LL | let x3: i8 = -129;
| ^^^
|
= note: the literal `129` does not fit into the type `i8` whose range is `-128..=127`
error: literal out of range for `i8`
--> $DIR/lint-type-overflow.rs:19:19
|
LL | let x3: i8 = -(129);
| ^^^^^
|
= note: the literal `129` does not fit into the type `i8` whose range is `-128..=127`
error: literal out of range for `i8`
--> $DIR/lint-type-overflow.rs:20:20
|
LL | let x3: i8 = -{129};
| ^^^
|
= note: the literal `129` does not fit into the type `i8` whose range is `-128..=127`
error: literal out of range for `i8`
--> $DIR/lint-type-overflow.rs:22:10
|
LL | test(1000);
| ^^^^
|
= note: the literal `1000` does not fit into the type `i8` whose range is `-128..=127`
error: literal out of range for `i8`
--> $DIR/lint-type-overflow.rs:24:13
|
LL | let x = 128_i8;
| ^^^^^^
|
= note: the literal `128_i8` does not fit into the type `i8` whose range is `-128..=127`
error: literal out of range for `i8`
--> $DIR/lint-type-overflow.rs:28:14
|
LL | let x = -129_i8;
| ^^^^^^
|
= note: the literal `129_i8` does not fit into the type `i8` whose range is `-128..=127`
error: literal out of range for `i32`
--> $DIR/lint-type-overflow.rs:32:18
|
LL | let x: i32 = 2147483648;
| ^^^^^^^^^^
|
= note: the literal `2147483648` does not fit into the type `i32` whose range is `-2147483648..=2147483647`
error: literal out of range for `i32`
--> $DIR/lint-type-overflow.rs:33:13
|
LL | let x = 2147483648_i32;
| ^^^^^^^^^^^^^^
|
= note: the literal `2147483648_i32` does not fit into the type `i32` whose range is `-2147483648..=2147483647`
error: literal out of range for `i32`
--> $DIR/lint-type-overflow.rs:36:19
|
LL | let x: i32 = -2147483649;
| ^^^^^^^^^^
|
= note: the literal `2147483649` does not fit into the type `i32` whose range is `-2147483648..=2147483647`
error: literal out of range for `i32`
--> $DIR/lint-type-overflow.rs:37:14
|
LL | let x = -2147483649_i32;
| ^^^^^^^^^^^^^^
|
= note: the literal `2147483649_i32` does not fit into the type `i32` whose range is `-2147483648..=2147483647`
error: literal out of range for `i32`
--> $DIR/lint-type-overflow.rs:38:13
|
LL | let x = 2147483648;
| ^^^^^^^^^^
|
= note: the literal `2147483648` does not fit into the type `i32` whose range is `-2147483648..=2147483647`
error: literal out of range for `i64`
--> $DIR/lint-type-overflow.rs:40:13
|
LL | let x = 9223372036854775808_i64;
| ^^^^^^^^^^^^^^^^^^^^^^^
|
= note: the literal `9223372036854775808_i64` does not fit into the type `i64` whose range is `-9223372036854775808..=9223372036854775807`
error: literal out of range for `i64`
--> $DIR/lint-type-overflow.rs:42:13
|
LL | let x = 18446744073709551615_i64;
| ^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: the literal `18446744073709551615_i64` does not fit into the type `i64` whose range is `-9223372036854775808..=9223372036854775807`
error: literal out of range for `i64`
--> $DIR/lint-type-overflow.rs:43:19
|
LL | let x: i64 = -9223372036854775809;
| ^^^^^^^^^^^^^^^^^^^
|
= note: the literal `9223372036854775809` does not fit into the type `i64` whose range is `-9223372036854775808..=9223372036854775807`
error: literal out of range for `i64`
--> $DIR/lint-type-overflow.rs:44:14
|
LL | let x = -9223372036854775809_i64;
| ^^^^^^^^^^^^^^^^^^^^^^^
|
= note: the literal `9223372036854775809_i64` does not fit into the type `i64` whose range is `-9223372036854775808..=9223372036854775807`
error: aborting due to 18 previous errors

9
src/test/ui/lint/lint-type-overflow2.stderr
View File

@ -9,30 +9,39 @@ note: the lint level is defined here
|
LL | #![deny(overflowing_literals)]
| ^^^^^^^^^^^^^^^^^^^^
= note: the literal `128` does not fit into the type `i8` whose range is `-128..=127`
error: literal out of range for `f32`
--> $DIR/lint-type-overflow2.rs:9:14
|
LL | let x = -3.40282357e+38_f32;
| ^^^^^^^^^^^^^^^^^^
|
= note: the literal `3.40282357e+38_f32` does not fit into the type `f32` and will be converted to `std::f32::INFINITY`
error: literal out of range for `f32`
--> $DIR/lint-type-overflow2.rs:10:14
|
LL | let x = 3.40282357e+38_f32;
| ^^^^^^^^^^^^^^^^^^
|
= note: the literal `3.40282357e+38_f32` does not fit into the type `f32` and will be converted to `std::f32::INFINITY`
error: literal out of range for `f64`
--> $DIR/lint-type-overflow2.rs:11:14
|
LL | let x = -1.7976931348623159e+308_f64;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: the literal `1.7976931348623159e+308_f64` does not fit into the type `f64` and will be converted to `std::f64::INFINITY`
error: literal out of range for `f64`
--> $DIR/lint-type-overflow2.rs:12:14
|
LL | let x = 1.7976931348623159e+308_f64;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: the literal `1.7976931348623159e+308_f64` does not fit into the type `f64` and will be converted to `std::f64::INFINITY`
error: aborting due to 5 previous errors

13
src/test/ui/lint/type-overflow.stderr
View File

@ -9,6 +9,7 @@ note: the lint level is defined here
|
LL | #![warn(overflowing_literals)]
| ^^^^^^^^^^^^^^^^^^^^
= note: the literal `255i8` does not fit into the type `i8` whose range is `-128..=127`
warning: literal out of range for i8
--> $DIR/type-overflow.rs:10:16
@ -16,7 +17,7 @@ warning: literal out of range for i8
LL | let fail = 0b1000_0001i8;
| ^^^^^^^^^^^^^ help: consider using `u8` instead: `0b1000_0001u8`
|
= note: the literal `0b1000_0001i8` (decimal `129`) does not fit into an `i8` and will become `-127i8`
= note: the literal `0b1000_0001i8` (decimal `129`) does not fit into the type `i8` and will become `-127i8`
warning: literal out of range for i64
--> $DIR/type-overflow.rs:12:16
@ -24,7 +25,7 @@ warning: literal out of range for i64
LL | let fail = 0x8000_0000_0000_0000i64;
| ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `u64` instead: `0x8000_0000_0000_0000u64`
|
= note: the literal `0x8000_0000_0000_0000i64` (decimal `9223372036854775808`) does not fit into an `i64` and will become `-9223372036854775808i64`
= note: the literal `0x8000_0000_0000_0000i64` (decimal `9223372036854775808`) does not fit into the type `i64` and will become `-9223372036854775808i64`
warning: literal out of range for u32
--> $DIR/type-overflow.rs:14:16
@ -32,7 +33,7 @@ warning: literal out of range for u32
LL | let fail = 0x1_FFFF_FFFFu32;
| ^^^^^^^^^^^^^^^^ help: consider using `u64` instead: `0x1_FFFF_FFFFu64`
|
= note: the literal `0x1_FFFF_FFFFu32` (decimal `8589934591`) does not fit into an `u32` and will become `4294967295u32`
= note: the literal `0x1_FFFF_FFFFu32` (decimal `8589934591`) does not fit into the type `u32` and will become `4294967295u32`
warning: literal out of range for i128
--> $DIR/type-overflow.rs:16:22
@ -40,7 +41,7 @@ warning: literal out of range for i128
LL | let fail: i128 = 0x8000_0000_0000_0000_0000_0000_0000_0000;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: the literal `0x8000_0000_0000_0000_0000_0000_0000_0000` (decimal `170141183460469231731687303715884105728`) does not fit into an `i128` and will become `-170141183460469231731687303715884105728i128`
= note: the literal `0x8000_0000_0000_0000_0000_0000_0000_0000` (decimal `170141183460469231731687303715884105728`) does not fit into the type `i128` and will become `-170141183460469231731687303715884105728i128`
= help: consider using `u128` instead
warning: literal out of range for i32
@ -49,7 +50,7 @@ warning: literal out of range for i32
LL | let fail = 0x8FFF_FFFF_FFFF_FFFE;
| ^^^^^^^^^^^^^^^^^^^^^
|
= note: the literal `0x8FFF_FFFF_FFFF_FFFE` (decimal `10376293541461622782`) does not fit into an `i32` and will become `-2i32`
= note: the literal `0x8FFF_FFFF_FFFF_FFFE` (decimal `10376293541461622782`) does not fit into the type `i32` and will become `-2i32`
= help: consider using `i128` instead
warning: literal out of range for i8
@ -58,5 +59,5 @@ warning: literal out of range for i8
LL | let fail = -0b1111_1111i8;
| ^^^^^^^^^^^^^ help: consider using `i16` instead: `0b1111_1111i16`
|
= note: the literal `0b1111_1111i8` (decimal `255`) does not fit into an `i8` and will become `-1i8`
= note: the literal `0b1111_1111i8` (decimal `255`) does not fit into the type `i8` and will become `-1i8`