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Add a test with a struct containing a String.

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This commit is contained in:
Chris Emerson 2017-10-07 23:32:09 +01:00
parent fcdce8fc1d
commit dcaaab3801
2 changed files with 127 additions and 110 deletions
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7
tests/ui/no_effect.rs
View file

@ -37,7 +37,9 @@ enum DropEnum {
impl Drop for DropEnum { impl Drop for DropEnum {
fn drop(&mut self) {} fn drop(&mut self) {}
} }
struct FooString {
s: String,
}
union Union { union Union {
a: u8, a: u8,
b: f64, b: f64,
@ -79,6 +81,8 @@ fn main() {
[42; 55][13]; [42; 55][13];
let mut x = 0; let mut x = 0;
|| x += 5; || x += 5;
let s: String = "foo".into();
FooString { s: s };
// Do not warn // Do not warn
get_number(); get_number();
@ -108,6 +112,7 @@ fn main() {
[get_number(); 55]; [get_number(); 55];
[42; 55][get_number() as usize]; [42; 55][get_number() as usize];
{get_number()}; {get_number()};
FooString { s: String::from("blah"), };
// Do not warn // Do not warn
DropTuple(get_number()); DropTuple(get_number());

230
tests/ui/no_effect.stderr
View file

@ -1,268 +1,280 @@
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:56:5 --> $DIR/no_effect.rs:58:5
| |
56 | 0; 58 | 0;
| ^^ | ^^
| |
= note: `-D no-effect` implied by `-D warnings` = note: `-D no-effect` implied by `-D warnings`
error: statement with no effect
--> $DIR/no_effect.rs:57:5
|
57 | s2;
| ^^^
error: statement with no effect
--> $DIR/no_effect.rs:58:5
|
58 | Unit;
| ^^^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:59:5 --> $DIR/no_effect.rs:59:5
| |
59 | Tuple(0); 59 | s2;
| ^^^^^^^^^ | ^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:60:5 --> $DIR/no_effect.rs:60:5
| |
60 | Struct { field: 0 }; 60 | Unit;
| ^^^^^^^^^^^^^^^^^^^^ | ^^^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:61:5 --> $DIR/no_effect.rs:61:5
| |
61 | Struct { ..s }; 61 | Tuple(0);
| ^^^^^^^^^^^^^^^ | ^^^^^^^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:62:5 --> $DIR/no_effect.rs:62:5
| |
62 | Union { a: 0 }; 62 | Struct { field: 0 };
| ^^^^^^^^^^^^^^^ | ^^^^^^^^^^^^^^^^^^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:63:5 --> $DIR/no_effect.rs:63:5
| |
63 | Enum::Tuple(0); 63 | Struct { ..s };
| ^^^^^^^^^^^^^^^ | ^^^^^^^^^^^^^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:64:5 --> $DIR/no_effect.rs:64:5
| |
64 | Enum::Struct { field: 0 }; 64 | Union { a: 0 };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ | ^^^^^^^^^^^^^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:65:5 --> $DIR/no_effect.rs:65:5
| |
65 | 5 + 6; 65 | Enum::Tuple(0);
| ^^^^^^ | ^^^^^^^^^^^^^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:66:5 --> $DIR/no_effect.rs:66:5
| |
66 | *&42; 66 | Enum::Struct { field: 0 };
| ^^^^^ | ^^^^^^^^^^^^^^^^^^^^^^^^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:67:5 --> $DIR/no_effect.rs:67:5
| |
67 | &6; 67 | 5 + 6;
| ^^^ | ^^^^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:68:5 --> $DIR/no_effect.rs:68:5
| |
68 | (5, 6, 7); 68 | *&42;
| ^^^^^^^^^^ | ^^^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:69:5 --> $DIR/no_effect.rs:69:5
| |
69 | box 42; 69 | &6;
| ^^^^^^^ | ^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:70:5 --> $DIR/no_effect.rs:70:5
| |
70 | ..; 70 | (5, 6, 7);
| ^^^ | ^^^^^^^^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:71:5 --> $DIR/no_effect.rs:71:5
| |
71 | 5..; 71 | box 42;
| ^^^^ | ^^^^^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:72:5 --> $DIR/no_effect.rs:72:5
| |
72 | ..5; 72 | ..;
| ^^^^ | ^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:73:5 --> $DIR/no_effect.rs:73:5
| |
73 | 5..6; 73 | 5..;
| ^^^^^ | ^^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:74:5 --> $DIR/no_effect.rs:74:5
| |
74 | 5..=6; 74 | ..5;
| ^^^^^^ | ^^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:75:5 --> $DIR/no_effect.rs:75:5
| |
75 | [42, 55]; 75 | 5..6;
| ^^^^^^^^^ | ^^^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:76:5 --> $DIR/no_effect.rs:76:5
| |
76 | [42, 55][1]; 76 | 5..=6;
| ^^^^^^^^^^^^ | ^^^^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:77:5 --> $DIR/no_effect.rs:77:5
| |
77 | (42, 55).1; 77 | [42, 55];
| ^^^^^^^^^^^ | ^^^^^^^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:78:5 --> $DIR/no_effect.rs:78:5
| |
78 | [42; 55]; 78 | [42, 55][1];
| ^^^^^^^^^ | ^^^^^^^^^^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:79:5 --> $DIR/no_effect.rs:79:5
| |
79 | [42; 55][13]; 79 | (42, 55).1;
| ^^^^^^^^^^^^^ | ^^^^^^^^^^^
error: statement with no effect
--> $DIR/no_effect.rs:80:5
|
80 | [42; 55];
| ^^^^^^^^^
error: statement with no effect error: statement with no effect
--> $DIR/no_effect.rs:81:5 --> $DIR/no_effect.rs:81:5
| |
81 | || x += 5; 81 | [42; 55][13];
| ^^^^^^^^^^^^^
error: statement with no effect
--> $DIR/no_effect.rs:83:5
|
83 | || x += 5;
| ^^^^^^^^^^ | ^^^^^^^^^^
error: statement can be reduced error: statement with no effect
--> $DIR/no_effect.rs:92:5 --> $DIR/no_effect.rs:85:5
| |
92 | Tuple(get_number()); 85 | FooString { s: s };
| ^^^^^^^^^^^^^^^^^^^
error: statement can be reduced
--> $DIR/no_effect.rs:96:5
|
96 | Tuple(get_number());
| ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `get_number();` | ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `get_number();`
| |
= note: `-D unnecessary-operation` implied by `-D warnings` = note: `-D unnecessary-operation` implied by `-D warnings`
error: statement can be reduced
--> $DIR/no_effect.rs:93:5
|
93 | Struct { field: get_number() };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `get_number();`
error: statement can be reduced
--> $DIR/no_effect.rs:94:5
|
94 | Struct { ..get_struct() };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `get_struct();`
error: statement can be reduced
--> $DIR/no_effect.rs:95:5
|
95 | Enum::Tuple(get_number());
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `get_number();`
error: statement can be reduced
--> $DIR/no_effect.rs:96:5
|
96 | Enum::Struct { field: get_number() };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `get_number();`
error: statement can be reduced error: statement can be reduced
--> $DIR/no_effect.rs:97:5 --> $DIR/no_effect.rs:97:5
| |
97 | 5 + get_number(); 97 | Struct { field: get_number() };
| ^^^^^^^^^^^^^^^^^ help: replace it with: `5;get_number();` | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `get_number();`
error: statement can be reduced error: statement can be reduced
--> $DIR/no_effect.rs:98:5 --> $DIR/no_effect.rs:98:5
| |
98 | *&get_number(); 98 | Struct { ..get_struct() };
| ^^^^^^^^^^^^^^^ help: replace it with: `get_number();` | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `get_struct();`
error: statement can be reduced error: statement can be reduced
--> $DIR/no_effect.rs:99:5 --> $DIR/no_effect.rs:99:5
| |
99 | &get_number(); 99 | Enum::Tuple(get_number());
| ^^^^^^^^^^^^^^ help: replace it with: `get_number();` | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `get_number();`
error: statement can be reduced error: statement can be reduced
--> $DIR/no_effect.rs:100:5 --> $DIR/no_effect.rs:100:5
| |
100 | (5, 6, get_number()); 100 | Enum::Struct { field: get_number() };
| ^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `5;6;get_number();` | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `get_number();`
error: statement can be reduced error: statement can be reduced
--> $DIR/no_effect.rs:101:5 --> $DIR/no_effect.rs:101:5
| |
101 | box get_number(); 101 | 5 + get_number();
| ^^^^^^^^^^^^^^^^^ help: replace it with: `get_number();` | ^^^^^^^^^^^^^^^^^ help: replace it with: `5;get_number();`
error: statement can be reduced error: statement can be reduced
--> $DIR/no_effect.rs:102:5 --> $DIR/no_effect.rs:102:5
| |
102 | get_number()..; 102 | *&get_number();
| ^^^^^^^^^^^^^^^ help: replace it with: `get_number();` | ^^^^^^^^^^^^^^^ help: replace it with: `get_number();`
error: statement can be reduced error: statement can be reduced
--> $DIR/no_effect.rs:103:5 --> $DIR/no_effect.rs:103:5
| |
103 | ..get_number(); 103 | &get_number();
| ^^^^^^^^^^^^^^^ help: replace it with: `get_number();` | ^^^^^^^^^^^^^^ help: replace it with: `get_number();`
error: statement can be reduced error: statement can be reduced
--> $DIR/no_effect.rs:104:5 --> $DIR/no_effect.rs:104:5
| |
104 | 5..get_number(); 104 | (5, 6, get_number());
| ^^^^^^^^^^^^^^^^ help: replace it with: `5;get_number();` | ^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `5;6;get_number();`
error: statement can be reduced error: statement can be reduced
--> $DIR/no_effect.rs:105:5 --> $DIR/no_effect.rs:105:5
| |
105 | [42, get_number()]; 105 | box get_number();
| ^^^^^^^^^^^^^^^^^^^ help: replace it with: `42;get_number();` | ^^^^^^^^^^^^^^^^^ help: replace it with: `get_number();`
error: statement can be reduced error: statement can be reduced
--> $DIR/no_effect.rs:106:5 --> $DIR/no_effect.rs:106:5
| |
106 | [42, 55][get_number() as usize]; 106 | get_number()..;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `[42, 55];get_number() as usize;` | ^^^^^^^^^^^^^^^ help: replace it with: `get_number();`
error: statement can be reduced error: statement can be reduced
--> $DIR/no_effect.rs:107:5 --> $DIR/no_effect.rs:107:5
| |
107 | (42, get_number()).1; 107 | ..get_number();
| ^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `42;get_number();` | ^^^^^^^^^^^^^^^ help: replace it with: `get_number();`
error: statement can be reduced error: statement can be reduced
--> $DIR/no_effect.rs:108:5 --> $DIR/no_effect.rs:108:5
| |
108 | [get_number(); 55]; 108 | 5..get_number();
| ^^^^^^^^^^^^^^^^^^^ help: replace it with: `get_number();` | ^^^^^^^^^^^^^^^^ help: replace it with: `5;get_number();`
error: statement can be reduced error: statement can be reduced
--> $DIR/no_effect.rs:109:5 --> $DIR/no_effect.rs:109:5
| |
109 | [42; 55][get_number() as usize]; 109 | [42, get_number()];
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `[42; 55];get_number() as usize;` | ^^^^^^^^^^^^^^^^^^^ help: replace it with: `42;get_number();`
error: statement can be reduced error: statement can be reduced
--> $DIR/no_effect.rs:110:5 --> $DIR/no_effect.rs:110:5
| |
110 | {get_number()}; 110 | [42, 55][get_number() as usize];
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `[42, 55];get_number() as usize;`
error: statement can be reduced
--> $DIR/no_effect.rs:111:5
|
111 | (42, get_number()).1;
| ^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `42;get_number();`
error: statement can be reduced
--> $DIR/no_effect.rs:112:5
|
112 | [get_number(); 55];
| ^^^^^^^^^^^^^^^^^^^ help: replace it with: `get_number();`
error: statement can be reduced
--> $DIR/no_effect.rs:113:5
|
113 | [42; 55][get_number() as usize];
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `[42; 55];get_number() as usize;`
error: statement can be reduced
--> $DIR/no_effect.rs:114:5
|
114 | {get_number()};
| ^^^^^^^^^^^^^^^ help: replace it with: `get_number();` | ^^^^^^^^^^^^^^^ help: replace it with: `get_number();`
error: statement can be reduced
--> $DIR/no_effect.rs:115:5
|
115 | FooString { s: String::from("blah"), };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `String::from("blah");`