rust/tests/target/match.rs

// rustfmt-normalize_comments: true
// Match expressions.

fn foo() {
    // A match expression.
    match x {
        // Some comment.
        a => foo(),
        b if 0 < 42 => foo(),
        c => {
            // Another comment.
            // Comment.
            an_expression;
            foo()
        }
        Foo(ref bar) => {
            aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
        }
        Pattern1 | Pattern2 | Pattern3 => false,
        Paternnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn |
        Paternnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn => blah,
        Patternnnnnnnnnnnnnnnnnnn |
        Patternnnnnnnnnnnnnnnnnnn |
        Patternnnnnnnnnnnnnnnnnnn |
        Patternnnnnnnnnnnnnnnnnnn => meh,

        Patternnnnnnnnnnnnnnnnnnn |
        Patternnnnnnnnnnnnnnnnnnn if looooooooooooooooooong_guard => meh,

        Patternnnnnnnnnnnnnnnnnnnnnnnnn |
        Patternnnnnnnnnnnnnnnnnnnnnnnnn if looooooooooooooooooooooooooooooooooooooooong_guard => {
            meh
        }

        // Test that earlier patterns can take the guard space
        (aaaa, bbbbb, ccccccc, aaaaa, bbbbbbbb, cccccc, aaaa, bbbbbbbb, cccccc, dddddd) |
        Patternnnnnnnnnnnnnnnnnnnnnnnnn if loooooooooooooooooooooooooooooooooooooooooong_guard => {}

        _ => {}
        ast::PathParameters::AngleBracketedParameters(ref data) if data.lifetimes.len() > 0 ||
                                                                   data.types.len() > 0 ||
                                                                   data.bindings.len() > 0 => {}
    }

    let whatever = match something {
        /// DOC COMMENT!
        Some(_) => 42,
        // Comment on an attribute.
        #[an_attribute]
        // Comment after an attribute.
        None => 0,
        #[rustfmt_skip]
        Blurb     =>     {                  }
    };
}

// Test that a match on an overflow line is laid out properly.
fn main() {
    let sub_span =
        match xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx {
            Some(sub_span) => Some(sub_span),
            None => sub_span,
        };
}

// Test that one-line bodies align.
fn main() {
    match r {
        Variableeeeeeeeeeeeeeeeee => {
            ("variable", vec!["id", "name", "qualname", "value", "type", "scopeid"], true, true)
        }
        Enummmmmmmmmmmmmmmmmmmmm => {
            ("enum", vec!["id", "qualname", "scopeid", "value"], true, true)
        }
        Variantttttttttttttttttttttttt => {
            ("variant", vec!["id", "name", "qualname", "type", "value", "scopeid"], true, true)
        }
    };

    match x {
        y => { /*Block with comment. Preserve me.*/ }
        z => {
            stmt();
        }
    }
}

fn matches() {
    match 1 {
        -1 => 10,
        1 => 1, // foo
        2 => 2,
        // bar
        3 => 3,
        _ => 0, // baz
    }
}

fn match_skip() {
    let _ = match Some(1) {
        #[rustfmt_skip]
        Some( n ) => n,
        None => 1,
    };
}

fn issue339() {
    match a {
        b => {}
        c => {}
        d => {}
        e => {}
        // collapsing here is safe
        ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff => {}
        // collapsing here exceeds line length
        ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffg => {
        }
        h => {
            // comment above block
        }
        i => {} // comment below block
        j => {
            // comment inside block
        }
        j2 => {
            // comments inside...
        } // ... and after
        // TODO uncomment when vertical whitespace is handled better
        // k => {
        //
        //     // comment with WS above
        // }
        // l => {
        //     // comment with ws below
        //
        // }
        m => {}
        n => {}
        o => {}
        p => {
            // Dont collapse me
        }
        q => {}
        r => {}
        s => 0, // s comment
        // t comment
        t => 1,
        u => 2,
        // TODO uncomment when block-support exists
        // v => {
        // } /* funky block
        //    * comment */
        // final comment
    }
}

fn issue355() {
    match mac {
        a => println!("a", b),
        b => vec![1, 2],
        c => vec![3; 4],
        d => println!("a", b),
        e => vec![1, 2],
        f => vec![3; 4],
        h => println!("a", b), // h comment
        i => vec![1, 2], // i comment
        j => vec![3; 4], // j comment
        // k comment
        k => println!("a", b),
        // l comment
        l => vec![1, 2],
        // m comment
        m => vec![3; 4],
        // Rewrite splits macro
        nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn => {
            println!("a", b)
        }
        // Rewrite splits macro
        oooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo => {
            vec![1, 2]
        }
        // Macro support fails to recognise this macro as splitable
        // We push the whole expr to a new line, TODO split this macro as well
        pppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp => {
            vec![3; 4]
        }
        // q, r and s: Rewrite splits match arm
        qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq => {
            println!("a", b)
        }
        rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr => {
            vec![1, 2]
        }
        ssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss => {
            vec![3; 4]
        }
        // Funky bracketing styles
        t => println!{"a", b},
        u => vec![1, 2],
        v => vec![3; 4],
        w => println!["a", b],
        x => vec![1, 2],
        y => vec![3; 4],
        // Brackets with comments
        tc => println!{"a", b}, // comment
        uc => vec![1, 2], // comment
        vc => vec![3; 4], // comment
        wc => println!["a", b], // comment
        xc => vec![1, 2], // comment
        yc => vec![3; 4], // comment
        yd => {
            looooooooooooooooooooooooooooooooooooooooooooooooooooooooong_func(aaaaaaaaaa,
                                                                              bbbbbbbbbb,
                                                                              cccccccccc,
                                                                              dddddddddd)
        }
    }
}

fn issue280() {
    {
        match x {
            CompressionMode::DiscardNewline |
            CompressionMode::CompressWhitespaceNewline => ch == '\n',
            ast::ItemConst(ref typ, ref expr) => {
                self.process_static_or_const_item(item, &typ, &expr)
            }
        }
    }
}

fn issue383() {
    match resolution.last_private {
        LastImport { .. } => false,
        _ => true,
    };
}

fn issue507() {
    match 1 {
        1 => unsafe { std::intrinsics::abort() },
        _ => (),
    }
}

fn issue508() {
    match s.type_id() {
        Some(NodeTypeId::Element(ElementTypeId::HTMLElement(
                    HTMLElementTypeId::HTMLCanvasElement))) => true,
        Some(NodeTypeId::Element(ElementTypeId::HTMLElement(
                        HTMLElementTypeId::HTMLObjectElement))) => s.has_object_data(),
        Some(NodeTypeId::Element(_)) => false,
    }
}

fn issue496() {
    {
        {
            {
                match def {
                    def::DefConst(def_id) |
                    def::DefAssociatedConst(def_id) => {
                        match const_eval::lookup_const_by_id(cx.tcx, def_id, Some(self.pat.id)) {
                            Some(const_expr) => x,
                        }
                    }
                }
            }
        }
    }
}

fn issue494() {
    {
        match stmt.node {
            hir::StmtExpr(ref expr, id) |
            hir::StmtSemi(ref expr, id) => {
                result.push(StmtRef::Mirror(Box::new(Stmt {
                                                         span: stmt.span,
                                                         kind: StmtKind::Expr {
                                                             scope: cx.tcx
                                                                 .region_maps
                                                                 .node_extent(id),
                                                             expr: expr.to_ref(),
                                                         },
                                                     })))
            }
        }
    }
}

fn issue386() {
    match foo {
        BiEq | BiLt | BiLe | BiNe | BiGt | BiGe => true,
        BiAnd | BiOr | BiAdd | BiSub | BiMul | BiDiv | BiRem | BiBitXor | BiBitAnd | BiBitOr |
        BiShl | BiShr => false,
    }
}

fn guards() {
    match foo {
        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa if foooooooooooooo &&
                                                                      barrrrrrrrrrrr => {}
        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa |
        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa if foooooooooooooo &&
                                                                      barrrrrrrrrrrr => {}
        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
            if fooooooooooooooooooooo &&
               (bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb ||
                cccccccccccccccccccccccccccccccccccccccc) => {}
    }
}

fn issue1371() {
    Some(match type_ {
             sfEvtClosed => Closed,
             sfEvtResized => {
                 let e = unsafe { *event.size.as_ref() };

                 Resized {
                     width: e.width,
                     height: e.height,
                 }
             }
             sfEvtLostFocus => LostFocus,
             sfEvtGainedFocus => GainedFocus,
             sfEvtTextEntered => {
                 TextEntered {
                     unicode:
                         unsafe {
                             ::std::char::from_u32((*event.text.as_ref()).unicode)
                                 .expect("Invalid unicode encountered on TextEntered event")
                         },
                 }
             }
             sfEvtKeyPressed => {
                 let e = unsafe { event.key.as_ref() };

                 KeyPressed {
                     code: unsafe { ::std::mem::transmute(e.code) },
                     alt: e.alt.to_bool(),
                     ctrl: e.control.to_bool(),
                     shift: e.shift.to_bool(),
                     system: e.system.to_bool(),
                 }
             }
             sfEvtKeyReleased => {
                 let e = unsafe { event.key.as_ref() };

                 KeyReleased {
                     code: unsafe { ::std::mem::transmute(e.code) },
                     alt: e.alt.to_bool(),
                     ctrl: e.control.to_bool(),
                     shift: e.shift.to_bool(),
                     system: e.system.to_bool(),
                 }
             }
         })
}

fn issue1395() {
    let bar = Some(true);
    let foo = Some(true);
    let mut x = false;
    bar.and_then(|_| match foo {
                     None => None,
                     Some(b) => {
                         x = true;
                         Some(b)
                     }
                 });
}

fn issue1456() {
    Ok(Recording {
           artists: match reader
                     .evaluate(".//mb:recording/mb:artist-credit/mb:name-credit")? {
               Nodeset(nodeset) => {
                   let res: Result<Vec<ArtistRef>, ReadError> = nodeset
                       .iter()
                       .map(|node| {
                                XPathNodeReader::new(node, &context)
                                    .and_then(|r| ArtistRef::from_xml(&r))
                            })
                       .collect();
                   res?
               }
               _ => Vec::new(),
           },
       })
}

fn issue1460() {
    let _ = match foo {
        REORDER_BUFFER_CHANGE_INTERNAL_SPEC_INSERT => {
            "internal_spec_insert_internal_spec_insert_internal_spec_insert"
        }
        _ => "reorder_something",
    };
}

fn issue525() {
    foobar(f, "{}", match *self {
        TaskState::Started => "started",
        TaskState::Success => "success",
        TaskState::Failed => "failed",
    });
}