Prune stale issues

Adds regression tests for the following issues which seem to be fixed on
master:

Closes rust-lang#1762
Closes rust-lang#2388
Closes rust-lang#2672
Closes rust-lang#2755
Closes rust-lang#2947
Closes rust-lang#2978
Closes rust-lang#3148
Closes rust-lang#3206

@topecongiro @calebcartwright appologies for the large number of issues
in this commit; if you prefer I can split it up into 2+.

Author: ayazhafiz

tests/source/issue-2947.rs

@@ -0,0 +1,25 @@
+// rustfmt-force_multiline_blocks: true
+
+impl fmt::Display for DeriveError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            DeriveError::UnionUnsupported(name) => {
+                write!(f, "Cannot derive `Spaned` for `union {}`", name)
+            }
+            DeriveError::UnitStructUnsupported(name) => {
+                write!(f, "Cannot derive `Spanned` for `struct {};`", name)
+            }
+            DeriveError::NamedStructLacksSpan(name) => write!(
+                f,
+                "Cannot derive `Spanned` for `struct {}` as it lacks a field `span`",
+                name
+            ),
+            DeriveError::TupleStructNotNewtype(name) => {
+                write!(f,
+                "Cannot derive `Spanned` for `struct {}` as it does not have a single tuple member",
+                name,
+            )
+            }
+        }
+    }
+}

tests/source/issue-2978.rs

@@ -0,0 +1,11 @@
+// rustfmt-control_brace_style: ClosingNextLine
+
+pub fn test() {
+    let xxxxxxxxxxxxxxxxxxxxxxxxxxxx = yyyyyyyyyyyyyyyy | zzzzzzzzzzzzzzzzzzzzzzzz | if for_writing
+    {
+        fffffffffffffffffffff
+    }
+    else {
+        g
+    };
+}

tests/source/issue-3206.rs

@@ -0,0 +1,35 @@
+fn apply_arithmetic_operation<'a>(op: ArithmeticOperation, state: &mut State) -> Result<'a, ()> {
+    match       (       state.stack.pop           (),       state.stack.pop      ()                   )
+
+
+
+
+
+    {
+                    (Some(value1), Some(value2)) => {
+
+
+
+                        match (value1, value2) {
+                        (Value::Number(num1), Value::Number(num2)) => {
+                            let result = match op {
+                                ArithmeticOperation::Addition => num1 + num2,
+                                ArithmeticOperation::Subtraction => num1 - num2,
+                                ArithmeticOperation::Multiplication => num1 * num2,
+                                    ArithmeticOperation::Division => num1 /num2,
+                                ArithmeticOperation::Remainder => num1 % num2,
+                            };
+                            state.stack.push(Value::Number(result));
+                            Ok(())
+                        }
+                        _ =>
+                    Err(Error::RuntimeError(
+                        "cannot sum values on top of stack: the two topmost values on the stack should be numbers",
+                    ))
+                    }}
+                    _ =>
+                                                return Err(Error::RuntimeError(
+                        "cannot sum values on top of stack: there must be at least two values on the stack",
+                    ))
+                }
+}

tests/target/issue-1762.rs

@@ -0,0 +1,12 @@
+// rustfmt-indent_style=Visual
+
+fn main() {
+    let grammar: Vec<_> = ast
+        .attrs
+        .iter()
+        .filter(|attr| match attr.value {
+            MetaItem::NameValue(ref ident, _) => format!("{}", ident) == "grammar",
+            _ => false,
+        })
+        .collect();
+}

tests/target/issue-2388.rs

@@ -0,0 +1,3 @@
+macro lex_err($kind: ident $(, $body: expr)*) {
+    Err(QlError::LexError(LexError::$kind($($body,)*)))
+}

tests/target/issue-2672.rs

@@ -0,0 +1,21 @@
+fn main() {
+    fn test(
+        averylongname_asdfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffdsffffffffffffffffffffffffffffffffffffffffffffffff: i32,
+    ) {
+    }
+    fn test(
+        shortname: i32,
+        averylongname_asdfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffdsffffffffffffffffffffffffffffffffffffffffffffffff: i32,
+    ) {
+    }
+
+    let averylongname_asdfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff =
+        0;
+}
+
+mod asdf {
+    fn test(
+        averylongname_asdfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffdsffffffffffffffffffffffffffffffffffffffffffffffff: i32,
+    ) {
+    }
+}

tests/target/issue-2755.rs

@@ -0,0 +1,41 @@
+macro_rules! __diesel_operator_to_sql {
+    (
+         notation = infix,
+         operator_expr = $op:expr,
+         field_exprs = ($left:expr, $right:expr),
+     ) => {
+        $left;
+        $op;
+        $right;
+    };
+
+    (
+         notation = postfix,
+         operator_expr = $op:expr,
+         field_exprs = ($expr:expr),
+     ) => {
+        $expr;
+        $op;
+    };
+
+    (
+         notation = prefix,
+         operator_expr = $op:expr,
+         field_exprs = ($expr:expr),
+     ) => {
+        $op;
+        $expr;
+    };
+
+    ($name:ident, $operator:expr, backend: $backend:ty) => {
+        diesel_postfix_operator!($name, $operator, $crate::sql_types::Bool, backend: $backend);
+    };
+
+    ($name:ident, $operator:expr, $return_ty:ty, backend: $backend:ty) => {
+        __diesel_operator_body!(notation = postfix, struct_name = $name,)
+    };
+
+    ($name:ident, $operator:expr, backend: $backend:ty) => {
+        diesel_prefix_operator!($name, $operator, $crate::sql_types::Bool, backend: $backend);
+    };
+}

tests/target/issue-2947.rs

@@ -0,0 +1,28 @@
+// rustfmt-force_multiline_blocks: true
+
+impl fmt::Display for DeriveError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            DeriveError::UnionUnsupported(name) => {
+                write!(f, "Cannot derive `Spaned` for `union {}`", name)
+            }
+            DeriveError::UnitStructUnsupported(name) => {
+                write!(f, "Cannot derive `Spanned` for `struct {};`", name)
+            }
+            DeriveError::NamedStructLacksSpan(name) => {
+                write!(
+                    f,
+                    "Cannot derive `Spanned` for `struct {}` as it lacks a field `span`",
+                    name
+                )
+            }
+            DeriveError::TupleStructNotNewtype(name) => {
+                write!(
+                    f,
+                    "Cannot derive `Spanned` for `struct {}` as it does not have a single tuple member",
+                    name,
+                )
+            }
+        }
+    }
+}

tests/target/issue-2978.rs

@@ -0,0 +1,12 @@
+// rustfmt-control_brace_style: ClosingNextLine
+
+pub fn test() {
+    let xxxxxxxxxxxxxxxxxxxxxxxxxxxx = yyyyyyyyyyyyyyyy
+        | zzzzzzzzzzzzzzzzzzzzzzzz
+        | if for_writing {
+            fffffffffffffffffffff
+        }
+        else {
+            g
+        };
+}

tests/target/issue-3148.rs

@@ -0,0 +1,14 @@
+// rustfmt-hard_tabs: true
+// rustfmt-normalize_comments: true
+
+/// ```
+/// Data {
+///     a: "some text data",
+///     ..Default::default()
+/// };
+/// ```
+#[derive(Default)]
+pub struct Data {
+	a: &str,
+	b: u32,
+}

tests/target/issue-3206.rs

@@ -0,0 +1,25 @@
+fn apply_arithmetic_operation<'a>(op: ArithmeticOperation, state: &mut State) -> Result<'a, ()> {
+    match (state.stack.pop(), state.stack.pop()) {
+        (Some(value1), Some(value2)) => match (value1, value2) {
+            (Value::Number(num1), Value::Number(num2)) => {
+                let result = match op {
+                    ArithmeticOperation::Addition => num1 + num2,
+                    ArithmeticOperation::Subtraction => num1 - num2,
+                    ArithmeticOperation::Multiplication => num1 * num2,
+                    ArithmeticOperation::Division => num1 / num2,
+                    ArithmeticOperation::Remainder => num1 % num2,
+                };
+                state.stack.push(Value::Number(result));
+                Ok(())
+            }
+            _ => Err(Error::RuntimeError(
+                "cannot sum values on top of stack: the two topmost values on the stack should be numbers",
+            )),
+        },
+        _ => {
+            return Err(Error::RuntimeError(
+                "cannot sum values on top of stack: there must be at least two values on the stack",
+            ));
+        }
+    }
+}