1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
use std::fmt;
use Table as TomlTable;
use Value::{self, String, Integer, Float, Boolean, Datetime, Array, Table};
struct Printer<'a, 'b:'a> {
output: &'a mut fmt::Formatter<'b>,
stack: Vec<&'a str>,
}
struct Key<'a>(&'a [&'a str]);
impl fmt::Display for Value {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
String(ref s) => write_str(f, s),
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),
Table(ref t) => {
let mut p = Printer { output: f, stack: Vec::new() };
p.print(t)
}
Array(ref a) => {
try!(write!(f, "["));
for (i, v) in a.iter().enumerate() {
if i != 0 { try!(write!(f, ", ")); }
try!(write!(f, "{}", v));
}
write!(f, "]")
}
}
}
}
fn write_str(f: &mut fmt::Formatter, s: &str) -> fmt::Result {
try!(write!(f, "\""));
for ch in s.chars() {
match ch {
'\u{8}' => try!(write!(f, "\\b")),
'\u{9}' => try!(write!(f, "\\t")),
'\u{a}' => try!(write!(f, "\\n")),
'\u{c}' => try!(write!(f, "\\f")),
'\u{d}' => try!(write!(f, "\\r")),
'\u{22}' => try!(write!(f, "\\\"")),
'\u{5c}' => try!(write!(f, "\\\\")),
ch => try!(write!(f, "{}", ch)),
}
}
write!(f, "\"")
}
impl<'a, 'b> Printer<'a, 'b> {
fn print(&mut self, table: &'a TomlTable) -> fmt::Result {
for (k, v) in table.iter() {
match *v {
Table(..) => continue,
Array(ref a) => {
if let Some(&Table(..)) = a.first() {
continue;
}
}
_ => {}
}
try!(writeln!(self.output, "{} = {}", Key(&[k]), v));
}
for (k, v) in table.iter() {
match *v {
Table(ref inner) => {
self.stack.push(k);
try!(writeln!(self.output, "\n[{}]", Key(&self.stack)));
try!(self.print(inner));
self.stack.pop();
}
Array(ref inner) => {
match inner.first() {
Some(&Table(..)) => {}
_ => continue
}
self.stack.push(k);
for inner in inner.iter() {
try!(writeln!(self.output, "\n[[{}]]", Key(&self.stack)));
match *inner {
Table(ref inner) => try!(self.print(inner)),
_ => panic!("non-heterogeneous toml array"),
}
}
self.stack.pop();
}
_ => {},
}
}
Ok(())
}
}
impl<'a> fmt::Display for Key<'a> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
for (i, part) in self.0.iter().enumerate() {
if i != 0 { try!(write!(f, ".")); }
let ok = part.chars().all(|c| {
match c {
'a' ... 'z' |
'A' ... 'Z' |
'0' ... '9' |
'-' | '_' => true,
_ => false,
}
});
if ok {
try!(write!(f, "{}", part));
} else {
try!(write_str(f, part));
}
}
Ok(())
}
}
#[cfg(test)]
#[allow(warnings)]
mod tests {
use Value;
use Value::{String, Integer, Float, Boolean, Datetime, Array, Table};
use std::collections::BTreeMap;
macro_rules! map( ($($k:expr => $v:expr),*) => ({
let mut _m = BTreeMap::new();
$(_m.insert($k.to_string(), $v);)*
_m
}) );
#[test]
fn simple_show() {
assert_eq!(String("foo".to_string()).to_string(),
"\"foo\"");
assert_eq!(Integer(10).to_string(),
"10");
assert_eq!(Float(10.0).to_string(),
"10.0");
assert_eq!(Float(2.4).to_string(),
"2.4");
assert_eq!(Boolean(true).to_string(),
"true");
assert_eq!(Datetime("test".to_string()).to_string(),
"test");
assert_eq!(Array(vec![]).to_string(),
"[]");
assert_eq!(Array(vec![Integer(1), Integer(2)]).to_string(),
"[1, 2]");
}
#[test]
fn table() {
assert_eq!(Table(map! { }).to_string(),
"");
assert_eq!(Table(map! { "test" => Integer(2) }).to_string(),
"test = 2\n");
assert_eq!(Table(map! {
"test" => Integer(2),
"test2" => Table(map! {
"test" => String("wut".to_string())
})
}).to_string(),
"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(),
"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(),
"test = 2\n\
\n\
[[test2]]\n\
test = \"wut\"\n");
assert_eq!(Table(map! {
"foo.bar" => Integer(2),
"foo\"bar" => Integer(2)
}).to_string(),
"\"foo\\\"bar\" = 2\n\
\"foo.bar\" = 2\n");
}
}
|
