Struct DatumWriter 

pub struct DatumWriter {
    pub indent: usize,
    pub state: DatumWriterState,
}

General interface for formatting/printing Datum content. Note that if the passed writer returns an error at any point, the state of the writer is indeterminate, as it can be mid-token or part-way through a comment.

Fields

indent: usize

Indentation level (in tabs).

state: DatumWriterState

Writer’s state. Beware: Editing this improperly can create unreadable output.

Implementations

impl DatumWriter

pub fn emit_whitespace(&mut self, f: &mut dyn Write, list_end: bool) -> Result

Emits queued whitespace. If list_end is set, won’t emit a single space. Will still emit indentation.

pub fn write_newline(&mut self, f: &mut dyn Write) -> Result

Writes a newline and prepares for it.

pub fn write_comment(&mut self, f: &mut dyn Write, text: &str) -> Result

Writes a line comment. Newlines are converted into more line comments.

pub fn write_token<B: Deref<Target = str>>( &mut self, f: &mut dyn Write, token: &DatumToken<B>, ) -> Result

Writes a token.

pub fn write_atom<B: Deref<Target = str>>( &mut self, f: &mut dyn Write, value: &DatumAtom<B>, ) -> Result

Writes a value from AST atom.

Trait Implementations

impl Clone for DatumWriter

fn clone(&self) -> DatumWriter

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DatumWriter

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for DatumWriter

fn default() -> DatumWriter

Returns the “default value” for a type.

impl PartialEq for DatumWriter

fn eq(&self, other: &DatumWriter) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for DatumWriter

impl Eq for DatumWriter

impl StructuralPartialEq for DatumWriter