add expression tests

Author: trevyn

src/expr.rs

@@ -424,7 +424,8 @@ pub(crate) fn format_expr(
 
             // +1 = ";"
             let allow_extend =
-                extend_inline_attr(&expr.attrs, shape, &attrs_str, expr_str.len() + 1, context);
+                extend_inline_attr(&expr.attrs, shape, &attrs_str, expr_str.len() + 1, context)
+                    && expr_type == ExprType::Statement;
 
             combine_strs_with_missing_comments(
                 context,

tests/source/configs/inline_attribute_width/50.rs

@@ -1,4 +1,5 @@
 // rustfmt-inline_attribute_width: 50
+// rustfmt-edition: 2021
 
 #[cfg(feature = "alloc")]
 use core::slice;
@@ -129,3 +130,203 @@ use total_len_is_::_51______;
     )
 )))]
 use core::slice;
+
+fn foo() {
+    // Literal expression
+    #[cfg(feature = "len_is_50_____________")]
+    42;
+    #[cfg(feature = "len_is_51______________")]
+    42;
+
+    // Path expression
+    #[cfg(feature = "len_is_50__")]
+    some_variable;
+    #[cfg(feature = "len_is_51___")]
+    some_variable;
+
+    // Block expression
+    #[cfg(feature = "len_is_50_______________")]
+    {
+        let x = 2;
+    };
+    #[cfg(feature = "len_is_51________________")]
+    {
+        let x = 2;
+    };
+
+    // Operator expression
+    #[cfg(feature = "len_is_50__________")]
+    1 + 2;
+    #[cfg(feature = "len_is_51___________")]
+    1 + 2;
+
+    // Tuple expression
+    #[cfg(feature = "len_is_50")]
+    (1, "two", 3.0);
+    #[cfg(feature = "len_is_51_")]
+    (1, "two", 3.0);
+
+    // Array expression
+    #[cfg(feature = "len_is_50______")]
+    [1, 2, 3];
+    #[cfg(feature = "len_is_51_______")]
+    [1, 2, 3];
+
+    // Struct expression
+    #[cfg(feature = "len_is_50_____")]
+    S { f: 1 };
+    #[cfg(feature = "len_is_51______")]
+    S { f: 1 };
+
+    #[cfg(feature = "len_is_50______")]
+    MyStruct {
+        field1: 1,
+        field2: 1,
+    };
+    #[cfg(feature = "len_is_51_______")]
+    MyStruct {
+        field1: 1,
+        field2: 1,
+    };
+
+    // Enum variant expression
+    #[cfg(feature = "len_is_50")]
+    MyEnum::Variant;
+    #[cfg(feature = "len_is_51_")]
+    MyEnum::Variant;
+
+    // Call expression
+    #[cfg(feature = "len_is_50")]
+    some_function();
+    #[cfg(feature = "len_is_51_")]
+    some_function();
+
+    // Method call expression
+    #[cfg(feature = "len_is_50")]
+    object.method();
+    #[cfg(feature = "len_is_51_")]
+    object.method();
+
+    // Field access expression
+    #[cfg(feature = "len_is_50")]
+    my_struct.field;
+    #[cfg(feature = "len_is_51_")]
+    my_struct.field;
+
+    // Tuple indexing expression
+    #[cfg(feature = "len_is_50_____")]
+    my_tuple.0;
+    #[cfg(feature = "len_is_51______")]
+    my_tuple.0;
+
+    // Indexing expression
+    #[cfg(feature = "len_is_50____")]
+    my_array[0];
+    #[cfg(feature = "len_is_51_____")]
+    my_array[0];
+
+    // Range expression
+    #[cfg(feature = "len_is_50___________")]
+    1..5;
+    #[cfg(feature = "len_is_51____________")]
+    1..5;
+
+    // If expression
+    #[cfg(feature = "len_is_50__")]
+    if condition {
+        1
+    };
+    #[cfg(feature = "len_is_51___")]
+    if condition {
+        1
+    };
+
+    // Loop expression
+    #[cfg(feature = "len_is_50__________")]
+    loop {
+        break;
+    }
+    #[cfg(feature = "len_is_51___________")]
+    loop {
+        break;
+    }
+
+    // While expression
+    #[cfg(feature = "len_is_50____")]
+    while cond {
+        break;
+    }
+    #[cfg(feature = "len_is_51_____")]
+    while cond {
+        break;
+    }
+
+    // For expression
+    #[cfg(feature = "len_is_50")]
+    for i in 0..10 {
+        break;
+    }
+    #[cfg(feature = "len_is_51_")]
+    for i in 0..10 {
+        break;
+    }
+
+    // Match expression
+    #[cfg(feature = "len_is_50___")]
+    match value {
+        Pattern1 => 1,
+        _ => 2,
+    };
+    #[cfg(feature = "len_is_51____")]
+    match value {
+        Pattern1 => 1,
+        _ => 2,
+    };
+
+    // Return expression
+    #[cfg(feature = "len_is_50_________")]
+    return;
+    #[cfg(feature = "len_is_51__________")]
+    return;
+
+    // Break expression
+    #[cfg(feature = "len_is_50__________")]
+    break;
+    #[cfg(feature = "len_is_51___________")]
+    break;
+
+    // Continue expression
+    #[cfg(feature = "len_is_50_______")]
+    continue;
+    #[cfg(feature = "len_is_51________")]
+    continue;
+
+    // Closure expression
+    #[cfg(feature = "len_is_50______")]
+    |x| x + 1;
+    #[cfg(feature = "len_is_51_______")]
+    |x| x + 1;
+
+    // Async block expression
+    #[cfg(feature = "len_is_50_________")]
+    async {
+        #[cfg(feature = "len_50__")]
+        future.await;
+        #[cfg(feature = "len_51___")]
+        future.await;
+    };
+
+    #[cfg(feature = "len_is_51__________")]
+    async {
+        #[cfg(feature = "len_50__")]
+        future.await;
+        #[cfg(feature = "len_51___")]
+        future.await;
+    };
+
+    // Try expression
+    #[cfg(feature = "len_is_50___")]
+    some_result?;
+    #[cfg(feature = "len_is_51____")]
+    some_result?;
+}