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|
//! A TOML-parsing library
//!
//! This library is an implementation in Rust of a parser for TOML configuration
//! files [1]. It is focused around high quality errors including specific spans
//! and detailed error messages when things go wrong.
//!
//! This implementation currently passes the language agnostic [test suite][2].
//!
//! # Example
//!
//! ```
//! let toml = r#"
//! [test]
//! foo = "bar"
//! "#;
//!
//! let value = toml::Parser::new(toml).parse().unwrap();
//! println!("{}", value);
//! ```
//!
//! # Conversions
//!
//! This library also supports using the standard `Encodable` and `Decodable`
//! traits with TOML values. This library provides the following conversion
//! capabilities:
//!
//! * `String` => `toml::Value` - via `Parser`
//! * `toml::Value` => `String` - via `Show`
//! * `toml::Value` => rust object - via `Decoder`
//! * rust object => `toml::Value` - via `Encoder`
//!
//! Convenience functions for performing multiple conversions at a time are also
//! provided.
//!
//! [1]: https://github.com/mojombo/toml
//! [2]: https://github.com/BurntSushi/toml-test
#![crate_type = "lib"]
#![feature(macro_rules)]
#![deny(warnings, missing_doc)]
#![allow(visible_private_types)]
extern crate serialize;
use std::collections::HashMap;
use std::from_str::FromStr;
pub use parser::{Parser, Error};
pub use serialization::{Encoder, encode, encode_str};
pub use serialization::{Decoder, decode, decode_str};
pub use serialization::{Error, NeedsKey, NoValue};
pub use serialization::{InvalidMapKeyLocation, InvalidMapKeyType};
mod parser;
mod show;
mod serialization;
#[cfg(test)] mod test;
/// Representation of a TOML value.
#[deriving(PartialEq, Clone)]
#[allow(missing_doc)]
pub enum Value {
String(String),
Integer(i64),
Float(f64),
Boolean(bool),
Datetime(String),
Array(Array),
Table(Table),
}
pub type Array = Vec<Value>;
pub type Table = HashMap<String, Value>;
impl Value {
/// Tests whether this and another value have the same type.
pub fn same_type(&self, other: &Value) -> bool {
match (self, other) {
(&String(..), &String(..)) |
(&Integer(..), &Integer(..)) |
(&Float(..), &Float(..)) |
(&Boolean(..), &Boolean(..)) |
(&Datetime(..), &Datetime(..)) |
(&Array(..), &Array(..)) |
(&Table(..), &Table(..)) => true,
_ => false,
}
}
/// Returns a human-readable representation of the type of this value.
pub fn type_str(&self) -> &'static str {
match *self {
String(..) => "string",
Integer(..) => "integer",
Float(..) => "float",
Boolean(..) => "boolean",
Datetime(..) => "datetime",
Array(..) => "array",
Table(..) => "table",
}
}
/// Extracts the string of this value if it is a string.
pub fn as_str<'a>(&'a self) -> Option<&'a str> {
match *self { String(ref s) => Some(s.as_slice()), _ => None }
}
/// Extracts the integer value if it is an integer.
pub fn as_integer(&self) -> Option<i64> {
match *self { Integer(i) => Some(i), _ => None }
}
/// Extracts the float value if it is a float.
pub fn as_float(&self) -> Option<f64> {
match *self { Float(f) => Some(f), _ => None }
}
/// Extracts the boolean value if it is a boolean.
pub fn as_bool(&self) -> Option<bool> {
match *self { Boolean(b) => Some(b), _ => None }
}
/// Extracts the datetime value if it is a datetime.
///
/// Note that a parsed TOML value will only contain ISO 8601 dates. An
/// example date is:
///
/// ```notrust
/// 1979-05-27T07:32:00Z
/// ```
pub fn as_datetime<'a>(&'a self) -> Option<&'a str> {
match *self { Datetime(ref s) => Some(s.as_slice()), _ => None }
}
/// Extracts the array value if it is an array.
pub fn as_slice<'a>(&'a self) -> Option<&'a [Value]> {
match *self { Array(ref s) => Some(s.as_slice()), _ => None }
}
/// Extracts the table value if it is a table.
pub fn as_table<'a>(&'a self) -> Option<&'a Table> {
match *self { Table(ref s) => Some(s), _ => None }
}
}
impl FromStr for Value {
fn from_str(s: &str) -> Option<Value> {
Parser::new(s).parse().map(Table)
}
}
|
