Struct DefaultSymbols 

pub struct DefaultSymbols;

The default set of symbols that produces neatly-drawn trees.

Example

StmtKind::Var
╰─declarations=↓
  ╰─Var
    ├─name: "x"
    ├─kind: Let
    ├─initializer: ExprKind::Binary
    │ ├─op: Add
    │ ├─left: Lit
    │ │ ├─token: "1"
    │ │ ╰─value: LitValue::Integer(1)
    │ ╰─right: Lit
    │   ├─token: "2.3"
    │   ╰─value: LitValue::Float(2.3)
    ╰─n_uses: 0
StmtKind::Print
╰─value: ExprKind::Comma
  ╰─operands=↓
    ├─Lit
    │ ├─token: "\"hello, world!\""
    │ ╰─value: LitValue::Str("hello, world!")
    ╰─ExprKind::Variable
      ╰─name: "x"

Trait Implementations

impl Symbols for DefaultSymbols

fn description(&self) -> &'static str

Used by the debug impl for &dyn Symbols.

fn horizontal_bar(&self) -> &'static str

The horizontal bar symbol used to draw horizontal tree branches, e.g. ─.

fn vertical_bar(&self) -> &'static str

The vertical bar symbol used to draw the tree trunks of the tree and its subtrees, e.g. │.

fn right_branch(&self) -> &'static str

A piece of trunk with a branch to the right, e.g. ├.

fn indent(&self) -> &'static str

A single indentation symbol, e.g. .

fn left_upper_corner(&self) -> &'static str

The symbol for left upper corners, e.g. ╭.

fn left_bottom_corner(&self) -> &'static str

The symbol for left bottom corners, e.g. ╰.

fn right_upper_corner(&self) -> &'static str

The symbol for right upper corners, e.g. ╮.

fn right_bottom_corner(&self) -> &'static str

The symbol for right bottom corners, e.g. ╯.

fn missing_items_symbol(&self) -> &'static str

The symbol to display when a list of items is empty, e.g. ✕.

fn item_list_symbol(&self) -> &'static str

The symbol to display when a list of items is non-empty, e.g. ↓.