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use std::convert::From;
use std::collections::HashMap;
#[derive(Debug, Clone, PartialEq)]
pub enum Value {
Nil,
String(String),
Integer(i64),
Float(f64),
Boolean(bool),
Table(HashMap<String, Value>),
Array(Vec<Value>),
}
impl Value {
pub fn into_str(self) -> Option<String> {
match self {
Value::String(value) => Some(value),
Value::Integer(value) => Some(value.to_string()),
Value::Float(value) => Some(value.to_string()),
Value::Boolean(value) => Some(value.to_string()),
_ => None,
}
}
pub fn into_bool(self) -> Option<bool> {
match self {
Value::Boolean(value) => Some(value),
Value::Integer(value) => Some(value != 0),
Value::Float(value) => Some(value != 0.0),
Value::String(ref value) => {
match value.to_lowercase().as_ref() {
"1" | "true" | "on" | "yes" => Some(true),
"0" | "false" | "off" | "no" => Some(false),
_ => None,
}
}
_ => None,
}
}
pub fn into_int(self) -> Option<i64> {
match self {
Value::Integer(value) => Some(value),
Value::String(ref value) => value.parse().ok(),
Value::Boolean(value) => Some(if value { 1 } else { 0 }),
Value::Float(value) => Some(value.round() as i64),
_ => None,
}
}
pub fn into_float(self) -> Option<f64> {
match self {
Value::Float(value) => Some(value),
Value::String(ref value) => value.parse().ok(),
Value::Integer(value) => Some(value as f64),
Value::Boolean(value) => Some(if value { 1.0 } else { 0.0 }),
_ => None,
}
}
pub fn into_table(self) -> Option<HashMap<String, Value>> {
match self {
Value::Table(value) => Some(value),
_ => None,
}
}
pub fn into_array(self) -> Option<Vec<Value>> {
match self {
Value::Array(value) => Some(value),
_ => None,
}
}
}
impl From<String> for Value {
fn from(value: String) -> Value {
Value::String(value.into())
}
}
impl<'a> From<&'a str> for Value {
fn from(value: &'a str) -> Value {
Value::String(value.into())
}
}
impl From<i64> for Value {
fn from(value: i64) -> Value {
Value::Integer(value)
}
}
impl From<f64> for Value {
fn from(value: f64) -> Value {
Value::Float(value)
}
}
impl From<bool> for Value {
fn from(value: bool) -> Value {
Value::Boolean(value)
}
}
impl<T> From<HashMap<String, T>> for Value
where T: Into<Value>
{
fn from(values: HashMap<String, T>) -> Value {
let mut r = HashMap::new();
for (k, v) in values {
r.insert(k.clone(), v.into());
}
Value::Table(r)
}
}
impl<T> From<Vec<T>> for Value
where T: Into<Value>
{
fn from(values: Vec<T>) -> Value {
let mut l = Vec::new();
for v in values {
l.push(v.into());
}
Value::Array(l)
}
}