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use std::collections::HashMap;
use std::hash::Hash;
use rustc_serialize::json::{ToJson, Json};
use parser::Spanning;
use ast::{InputValue, ToInputValue};
#[derive(Debug, PartialEq)]
#[allow(missing_docs)]
pub enum Value {
Null,
Int(i64),
Float(f64),
String(String),
Boolean(bool),
List(Vec<Value>),
Object(HashMap<String, Value>),
}
impl Value {
pub fn null() -> Value { Value::Null }
pub fn int(i: i64) -> Value { Value::Int(i) }
pub fn float(f: f64) -> Value { Value::Float(f) }
pub fn string<T: AsRef<str>>(s: T) -> Value { Value::String(s.as_ref().to_owned()) }
pub fn boolean(b: bool) -> Value { Value::Boolean(b) }
pub fn list(l: Vec<Value>) -> Value { Value::List(l) }
pub fn object<K>(o: HashMap<K, Value>) -> Value
where K: AsRef<str> + Eq + Hash
{
Value::Object(
o.into_iter().map(|(k, v)| (k.as_ref().to_owned(), v)).collect()
)
}
pub fn is_null(&self) -> bool {
match *self {
Value::Null => true,
_ => false,
}
}
pub fn as_object_value(&self) -> Option<&HashMap<String, Value>> {
match *self {
Value::Object(ref o) => Some(o),
_ => None,
}
}
pub fn as_mut_object_value(&mut self) -> Option<&mut HashMap<String, Value>> {
match *self {
Value::Object(ref mut o) => Some(o),
_ => None,
}
}
pub fn as_list_value(&self) -> Option<&Vec<Value>> {
match *self {
Value::List(ref l) => Some(l),
_ => None,
}
}
pub fn as_string_value(&self) -> Option<&str> {
match *self {
Value::String(ref s) => Some(s),
_ => None,
}
}
}
impl ToJson for Value {
fn to_json(&self) -> Json {
match *self {
Value::Null => Json::Null,
Value::Int(i) => Json::I64(i),
Value::Float(f) => Json::F64(f),
Value::String(ref s) => Json::String(s.clone()),
Value::Boolean(b) => Json::Boolean(b),
Value::List(ref l) => Json::Array(l.iter().map(|x| x.to_json()).collect()),
Value::Object(ref o) => Json::Object(o.iter().map(|(k,v)| (k.clone(), v.to_json())).collect()),
}
}
}
impl ToInputValue for Value {
fn to(&self) -> InputValue {
match *self {
Value::Null => InputValue::Null,
Value::Int(i) => InputValue::Int(i),
Value::Float(f) => InputValue::Float(f),
Value::String(ref s) => InputValue::String(s.clone()),
Value::Boolean(b) => InputValue::Boolean(b),
Value::List(ref l) => InputValue::List(l.iter().map(|x|
Spanning::unlocated(x.to())).collect()),
Value::Object(ref o) => InputValue::Object(o.iter().map(|(k,v)|
(Spanning::unlocated(k.clone()), Spanning::unlocated(v.to()))).collect()),
}
}
}