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use std::fmt::{Display, Error, Formatter, Write}; use super::{Document, KeyMarkup, StringValue, TableKeyMarkup, BoolValue}; use super::{ValueRef, Container, DirectChild, InlineArray, FloatValue}; use super::{ContainerKind, InlineTable, IntegerValue, DatetimeValue, ValueMarkup}; fn fmt_join<'a, T, I>(f: &mut Formatter, values: I, sep: &str) -> Result<(), Error> where T: Display, I:Iterator<Item=T>{ let mut values = values.peekable(); loop { let value = values.next(); match value { Some(value) => { try!(write!(f, "{}", value)); if values.peek().is_some() { try!(write!(f, "{}", sep)); } } None => break, } } Ok(()) } fn fmt_with_markup<T>(f: &mut Formatter, value: T, markup: &ValueMarkup) -> Result<(), Error> where T: Display { write!(f, "{}{}{}", markup.get_leading_trivia(), value, markup.get_trailing_trivia()) } impl Display for Document { fn fmt(&self, f: &mut Formatter) -> Result<(), Error> { fmt_join(f, self.iter_children(), "") .and_then(|_| fmt_join(f, self.iter_containers(), "")) .and_then(|_| write!(f, "{}", self.get_trailing_trivia())) } } impl Display for DirectChild { fn fmt(&self, f: &mut Formatter) -> Result<(), Error> { write!(f, "{}={}", self.key(), self.value()) } } impl<'a> Display for ValueRef<'a> { fn fmt(&self, f: &mut Formatter) -> Result<(), Error> { match *self { ValueRef::String(node) => node.fmt(f), ValueRef::Integer(node) => node.fmt(f), ValueRef::Float(node) => node.fmt(f), ValueRef::Boolean(node) => node.fmt(f), ValueRef::Datetime(node) => node.fmt(f), ValueRef::Array(arr) => arr.fmt(f), ValueRef::Table(table) => table.fmt(f), } } } impl Display for StringValue { fn fmt(&self, f: &mut Formatter) -> Result<(), Error> { fmt_with_markup(f, self.raw(), self.markup()) } } impl Display for IntegerValue { fn fmt(&self, f: &mut Formatter) -> Result<(), Error> { fmt_with_markup(f, self.raw(), self.markup()) } } impl Display for BoolValue { fn fmt(&self, f: &mut Formatter) -> Result<(), Error> { fmt_with_markup(f, self.get(), self.markup()) } } impl Display for DatetimeValue { fn fmt(&self, f: &mut Formatter) -> Result<(), Error> { fmt_with_markup(f, self.get(), self.markup()) } } impl Display for FloatValue { fn fmt(&self, f: &mut Formatter) -> Result<(), Error> { fmt_with_markup(f, self.raw(), self.markup()) } } impl Display for InlineArray { fn fmt(&self, f: &mut Formatter) -> Result<(), Error> { try!(write!(f, "{}[", self.markup().get_leading_trivia())); try!(fmt_join(f, self.iter(), ",")); try!(write!(f, "{}", self.markup().get_comma_trivia())); try!(write!(f, "]{}", self.markup().get_trailing_trivia())); Ok(()) } } impl Display for InlineTable { fn fmt(&self, f: &mut Formatter) -> Result<(), Error> { try!(write!(f, "{}{{", self.markup().get_leading_trivia())); try!(fmt_join(f, self.iter(), ",")); try!(write!(f, "}}{}", self.markup().get_trailing_trivia())); Ok(()) } } impl<'a> Display for KeyMarkup { fn fmt(&self, f: &mut Formatter) -> Result<(), Error> { write!(f, "{}{}{}", self.get_leading_trivia(), self.raw(), self.get_trailing_trivia()) } } impl<'a> Display for TableKeyMarkup { fn fmt(&self, f: &mut Formatter) -> Result<(), Error> { write!(f, "{}{}{}", self.get_leading_trivia(), self.raw(), self.get_trailing_trivia()) } } impl Display for Container { fn fmt(&self, f: &mut Formatter) -> Result<(), Error> { let is_array = match self.kind { ContainerKind::ArrayMember => true, ContainerKind::Table => false }; try!(write!(f, "{}", self.keys().get_leading_trivia())); if is_array { try!(write!(f, "[[")); } else { try!(write!(f, "[")); } try!(fmt_join(f, self.keys().markup().iter(), ".")); if is_array { try!(write!(f, "]]")); } else { try!(write!(f, "]")); } fmt_join(f, self.iter_children(), "") } }