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|
use std::fmt;
use {Value, String, Integer, Float, Boolean, Datetime, Array, Table};
struct Printer<'a, 'b:'a> {
output: &'a mut fmt::Formatter<'b>,
stack: Vec<&'a str>,
}
impl fmt::Show for Value {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
String(ref s) => {
try!(write!(f, "\""));
for ch in s.as_slice().chars() {
match ch {
'\u0008' => try!(write!(f, "\\b")),
'\u0009' => try!(write!(f, "\\t")),
'\u000a' => try!(write!(f, "\\n")),
'\u000c' => try!(write!(f, "\\f")),
'\u000d' => try!(write!(f, "\\r")),
'\u0022' => try!(write!(f, "\\\"")),
'\u005c' => try!(write!(f, "\\\\")),
ch => try!(write!(f, "{}", ch)),
}
}
write!(f, "\"")
}
Integer(i) => write!(f, "{}", i),
Float(fp) => {
try!(write!(f, "{}", fp));
if fp % 1.0 == 0.0 { try!(write!(f, ".0")) }
Ok(())
}
Boolean(b) => write!(f, "{}", b),
Datetime(ref s) => write!(f, "{}", s),
Array(ref a) => {
match a.as_slice().head() {
Some(&Table(..)) => fail!("invalid toml array of tables"),
_ => {}
}
write!(f, "{}", a)
}
Table(ref t) => {
let mut p = Printer { output: f, stack: Vec::new() };
p.print(t)
}
}
}
}
impl<'a, 'b> Printer<'a, 'b> {
fn print(&mut self, table: &'a Table) -> fmt::Result {
for (k, v) in table.iter() {
match *v {
Table(..) => continue,
Array(ref a) => {
match a.as_slice().head() {
Some(&Table(..)) => continue,
_ => {}
}
}
_ => {}
}
try!(writeln!(self.output, "{} = {}", k, v));
}
for (k, v) in table.iter() {
match *v {
Table(ref inner) => {
self.stack.push(k.as_slice());
try!(writeln!(self.output, "\n[{}]",
self.stack.connect(".")));
try!(self.print(inner));
self.stack.pop();
}
Array(ref inner) => {
match inner.as_slice().head() {
Some(&Table(..)) => {}
_ => continue
}
self.stack.push(k.as_slice());
for inner in inner.iter() {
try!(writeln!(self.output, "\n[[{}]]",
self.stack.connect(".")));
match *inner {
Table(ref inner) => try!(self.print(inner)),
_ => fail!("non-heterogeneous toml array"),
}
}
self.stack.pop();
}
_ => {},
}
}
Ok(())
}
}
#[cfg(test)]
#[allow(warnings)]
mod tests {
use {Value, String, Integer, Float, Boolean, Datetime, Array, Table};
use std::collections::TreeMap;
macro_rules! map( ($($k:expr: $v:expr),*) => ({
let mut _m = TreeMap::new();
$(_m.insert($k.to_string(), $v);)*
_m
}) )
#[test]
fn simple_show() {
assert_eq!(String("foo".to_string()).to_string().as_slice(),
"\"foo\"")
assert_eq!(Integer(10).to_string().as_slice(),
"10")
assert_eq!(Float(10.0).to_string().as_slice(),
"10.0")
assert_eq!(Float(2.4).to_string().as_slice(),
"2.4")
assert_eq!(Boolean(true).to_string().as_slice(),
"true")
assert_eq!(Datetime("test".to_string()).to_string().as_slice(),
"test")
assert_eq!(Array(vec![]).to_string().as_slice(),
"[]")
assert_eq!(Array(vec![Integer(1), Integer(2)]).to_string().as_slice(),
"[1, 2]")
}
#[test]
fn table() {
assert_eq!(Table(map! { }).to_string().as_slice(),
"")
assert_eq!(Table(map! { "test": Integer(2) }).to_string().as_slice(),
"test = 2\n")
assert_eq!(Table(map! {
"test": Integer(2),
"test2": Table(map! {
"test": String("wut".to_string())
})
}).to_string().as_slice(),
"test = 2\n\
\n\
[test2]\n\
test = \"wut\"\n")
assert_eq!(Table(map! {
"test": Integer(2),
"test2": Table(map! {
"test": String("wut".to_string())
})
}).to_string().as_slice(),
"test = 2\n\
\n\
[test2]\n\
test = \"wut\"\n")
assert_eq!(Table(map! {
"test": Integer(2),
"test2": Array(vec![Table(map! {
"test": String("wut".to_string())
})])
}).to_string().as_slice(),
"test = 2\n\
\n\
[[test2]]\n\
test = \"wut\"\n")
}
}
|
