error: item `PubOne` has a public `len` method but no corresponding `is_empty` method --> len_zero.rs:9:1 | 9 | / impl PubOne { 10 | | pub fn len(self: &Self) -> isize { 11 | | 1 12 | | } 13 | | } | |_^ | = note: `-D len-without-is-empty` implied by `-D warnings` error: trait `PubTraitsToo` has a `len` method but no `is_empty` method --> len_zero.rs:55:1 | 55 | / pub trait PubTraitsToo { 56 | | fn len(self: &Self) -> isize; 57 | | } | |_^ | = note: `-D len-without-is-empty` implied by `-D warnings` error: item `HasIsEmpty` has a public `len` method but a private `is_empty` method --> len_zero.rs:89:1 | 89 | / impl HasIsEmpty { 90 | | pub fn len(self: &Self) -> isize { 91 | | 1 92 | | } ... | 96 | | } 97 | | } | |_^ | = note: `-D len-without-is-empty` implied by `-D warnings` error: item `HasWrongIsEmpty` has a public `len` method but no corresponding `is_empty` method --> len_zero.rs:118:1 | 118 | / impl HasWrongIsEmpty { 119 | | pub fn len(self: &Self) -> isize { 120 | | 1 121 | | } ... | 125 | | } 126 | | } | |_^ | = note: `-D len-without-is-empty` implied by `-D warnings` error: length comparison to zero --> len_zero.rs:130:8 | 130 | if x.len() == 0 { | ^^^^^^^^^^^^ help: using `is_empty` is more concise: `x.is_empty()` | = note: `-D len-zero` implied by `-D warnings` error: length comparison to zero --> len_zero.rs:134:8 | 134 | if "".len() == 0 { | ^^^^^^^^^^^^^ help: using `is_empty` is more concise: `"".is_empty()` | = note: `-D len-zero` implied by `-D warnings` error: length comparison to zero --> len_zero.rs:148:8 | 148 | if has_is_empty.len() == 0 { | ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is more concise: `has_is_empty.is_empty()` | = note: `-D len-zero` implied by `-D warnings` error: length comparison to zero --> len_zero.rs:151:8 | 151 | if has_is_empty.len() != 0 { | ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is more concise: `!has_is_empty.is_empty()` | = note: `-D len-zero` implied by `-D warnings` error: length comparison to zero --> len_zero.rs:154:8 | 154 | if has_is_empty.len() > 0 { | ^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is more concise: `!has_is_empty.is_empty()` | = note: `-D len-zero` implied by `-D warnings` error: length comparison to zero --> len_zero.rs:160:8 | 160 | if with_is_empty.len() == 0 { | ^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is more concise: `with_is_empty.is_empty()` | = note: `-D len-zero` implied by `-D warnings` error: length comparison to zero --> len_zero.rs:172:8 | 172 | if b.len() != 0 { | ^^^^^^^^^^^^ help: using `is_empty` is more concise: `!b.is_empty()` | = note: `-D len-zero` implied by `-D warnings` error: aborting due to previous error(s) To learn more, run the command again with --verbose.