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mentat/edn/src/types.rs
Richard Newman 9b23cf3945
Speed up EDN parser (fixes #445) (#581) r=nalexander 
Fixes from @kevinmehall.

* Prefer character sets over backtracking in the EDN parser.
* Avoid duplicate effort when parsing floats in the EDN parser.
* Clean up duplicate position tracking code.

This turns out to have little performance impact, but makes the grammar
much cleaner.

* Fix EDN work to pass tests with correct numeric precedence.
2018-03-05 20:33:51 -08:00

679 lines
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// Copyright 2016 Mozilla
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
// this file except in compliance with the License. You may obtain a copy of the
// License at http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software distributed
// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
// CONDITIONS OF ANY KIND, either express or implied. See the License for the
// specific language governing permissions and limitations under the License.
#![cfg_attr(feature = "cargo-clippy", allow(linkedlist))]
use std::collections::{BTreeSet, BTreeMap, LinkedList};
use std::cmp::{Ordering, Ord, PartialOrd};
use std::fmt::{Display, Formatter};
use std::f64;
use chrono::{
DateTime,
TimeZone, // For Utc::timestamp. The compiler incorrectly complains that this is unused.
Utc,
};
use num::BigInt;
use ordered_float::OrderedFloat;
use uuid::Uuid;
use symbols;
/// Value represents one of the allowed values in an EDN string.
#[derive(PartialEq, Eq, Hash, Clone, Debug)]
pub enum Value {
Nil,
Boolean(bool),
Integer(i64),
Instant(DateTime<Utc>),
BigInteger(BigInt),
Float(OrderedFloat<f64>),
Text(String),
Uuid(Uuid),
PlainSymbol(symbols::PlainSymbol),
NamespacedSymbol(symbols::NamespacedSymbol),
Keyword(symbols::Keyword),
NamespacedKeyword(symbols::NamespacedKeyword),
Vector(Vec<Value>),
// We're using a LinkedList here instead of a Vec or VecDeque because the
// LinkedList is faster for appending (which we do a lot of).
// See https://github.com/mozilla/mentat/issues/231
List(LinkedList<Value>),
// We're using BTree{Set, Map} rather than Hash{Set, Map} because the BTree variants
// implement Hash. The Hash variants don't in order to preserve O(n) hashing
// time, which is hard given recursive data structures.
// See https://internals.rust-lang.org/t/implementing-hash-for-hashset-hashmap/3817/1
Set(BTreeSet<Value>),
Map(BTreeMap<Value, Value>),
}
/// `SpannedValue` is the parallel to `Value` but used in `ValueAndSpan`.
/// Container types have `ValueAndSpan` children.
#[derive(PartialEq, Eq, Hash, Clone, Debug)]
pub enum SpannedValue {
Nil,
Boolean(bool),
Integer(i64),
Instant(DateTime<Utc>),
BigInteger(BigInt),
Float(OrderedFloat<f64>),
Text(String),
Uuid(Uuid),
PlainSymbol(symbols::PlainSymbol),
NamespacedSymbol(symbols::NamespacedSymbol),
Keyword(symbols::Keyword),
NamespacedKeyword(symbols::NamespacedKeyword),
Vector(Vec<ValueAndSpan>),
List(LinkedList<ValueAndSpan>),
Set(BTreeSet<ValueAndSpan>),
Map(BTreeMap<ValueAndSpan, ValueAndSpan>),
}
/// Span represents the current offset (start, end) into the input string.
#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
pub struct Span(pub u32, pub u32);
impl Span {
pub fn new(start: usize, end: usize) -> Span {
Span(start as u32, end as u32)
}
}
/// A wrapper type around `SpannedValue` and `Span`, representing some EDN value
/// and the parsing offset (start, end) in the original EDN string.
#[derive(PartialEq, Eq, Hash, Clone, Debug)]
pub struct ValueAndSpan {
pub inner: SpannedValue,
pub span: Span,
}
impl ValueAndSpan {
pub fn new<I>(spanned_value: SpannedValue, span: I) -> ValueAndSpan where I: Into<Option<Span>> {
ValueAndSpan {
inner: spanned_value,
span: span.into().unwrap_or(Span(0, 0)), // TODO: consider if this has implications.
}
}
pub fn into_atom(self) -> Option<ValueAndSpan> {
if self.inner.is_atom() {
Some(self)
} else {
None
}
}
pub fn as_atom(&self) -> Option<&ValueAndSpan> {
if self.inner.is_atom() {
Some(self)
} else {
None
}
}
pub fn into_text(self) -> Option<String> {
self.inner.into_text()
}
pub fn as_text(&self) -> Option<&String> {
self.inner.as_text()
}
}
impl Value {
/// For debug use only!
///
/// But right now, it's used in the bootstrapper. We'll fix that soon.
pub fn with_spans(self) -> ValueAndSpan {
let s = self.to_pretty(120).unwrap();
use ::parse;
let with_spans = parse::value(&s).unwrap();
assert_eq!(self, with_spans.clone().without_spans());
with_spans
}
}
impl From<SpannedValue> for Value {
fn from(src: SpannedValue) -> Value {
match src {
SpannedValue::Nil => Value::Nil,
SpannedValue::Boolean(v) => Value::Boolean(v),
SpannedValue::Integer(v) => Value::Integer(v),
SpannedValue::Instant(v) => Value::Instant(v),
SpannedValue::BigInteger(v) => Value::BigInteger(v),
SpannedValue::Float(v) => Value::Float(v),
SpannedValue::Text(v) => Value::Text(v),
SpannedValue::Uuid(v) => Value::Uuid(v),
SpannedValue::PlainSymbol(v) => Value::PlainSymbol(v),
SpannedValue::NamespacedSymbol(v) => Value::NamespacedSymbol(v),
SpannedValue::Keyword(v) => Value::Keyword(v),
SpannedValue::NamespacedKeyword(v) => Value::NamespacedKeyword(v),
SpannedValue::Vector(v) => Value::Vector(v.into_iter().map(|x| x.without_spans()).collect()),
SpannedValue::List(v) => Value::List(v.into_iter().map(|x| x.without_spans()).collect()),
SpannedValue::Set(v) => Value::Set(v.into_iter().map(|x| x.without_spans()).collect()),
SpannedValue::Map(v) => Value::Map(v.into_iter().map(|(x, y)| (x.without_spans(), y.without_spans())).collect()),
}
}
}
impl From<ValueAndSpan> for Value {
fn from(src: ValueAndSpan) -> Value {
src.inner.into()
}
}
/// Creates `from_$TYPE` helper functions for Value and SpannedValue,
/// like `from_float()` or `from_ordered_float()`.
macro_rules! def_from {
($name: ident, $out: ty, $kind: path, $t: ty, $( $transform: expr ),* ) => {
pub fn $name(src: $t) -> $out {
$( let src = $transform(src); )*
$kind(src)
}
}
}
/// Creates `from_$TYPE` helper functions for Value or SpannedValue,
/// like `from_bigint()` where the conversion is optional.
macro_rules! def_from_option {
($name: ident, $out: ty, $kind: path, $t: ty, $( $transform: expr ),* ) => {
pub fn $name(src: $t) -> Option<$out> {
$( let src = $transform(src); )*
src.map($kind)
}
}
}
/// Creates `is_$TYPE` helper functions for Value or SpannedValue, like
/// `is_big_integer()` or `is_text()`.
macro_rules! def_is {
($name: ident, $pat: pat) => {
pub fn $name(&self) -> bool {
match *self { $pat => true, _ => false }
}
}
}
/// Creates `as_$TYPE` helper functions for Value or SpannedValue, like
/// `as_integer()`, which returns the underlying value representing the
/// original variable wrapped in an Option, like `Option<i64>`.
macro_rules! def_as {
($name: ident, $kind: path, $t: ty, $( $transform: expr ),* ) => {
pub fn $name(&self) -> Option<$t> {
match *self { $kind(v) => { $( let v = $transform(v) )*; Some(v) }, _ => None }
}
}
}
/// Creates `as_$TYPE` helper functions for Value or SpannedValue, like
/// `as_big_integer()`, which returns a reference to the underlying value
/// representing the original variable wrapped in an Option, like `Option<&BigInt>`.
macro_rules! def_as_ref {
($name: ident, $kind: path, $t: ty) => {
pub fn $name(&self) -> Option<&$t> {
match *self { $kind(ref v) => Some(v), _ => None }
}
}
}
/// Creates `into_$TYPE` helper functions for Value or SpannedValue, like
/// `into_big_integer()`, which consumes it returning underlying value
/// representing the original variable wrapped in an Option, like `Option<BigInt>`.
macro_rules! def_into {
($name: ident, $kind: path, $t: ty, $( $transform: expr ),* ) => {
pub fn $name(self) -> Option<$t> {
match self { $kind(v) => { $( let v = $transform(v) )*; Some(v) }, _ => None }
}
}
}
/// Converts `name` into a plain or namespaced value symbol, depending on
/// whether or not `namespace` is given.
///
/// # Examples
///
/// ```
/// # use edn::types::to_symbol;
/// # use edn::types::Value;
/// # use edn::symbols;
/// let value = to_symbol!("foo", "bar", Value);
/// assert_eq!(value, Value::NamespacedSymbol(symbols::NamespacedSymbol::new("foo", "bar")));
///
/// let value = to_symbol!(None, "baz", Value);
/// assert_eq!(value, Value::PlainSymbol(symbols::PlainSymbol::new("baz")));
///
/// let value = to_symbol!("foo", "bar", SpannedValue);
/// assert_eq!(value.into(), to_symbol!("foo", "bar", Value));
///
/// let value = to_symbol!(None, "baz", SpannedValue);
/// assert_eq!(value.into(), to_symbol!(None, "baz", Value));
/// ```
macro_rules! to_symbol {
( $namespace:expr, $name:expr, $t:tt ) => {
$namespace.into().map_or_else(
|| $t::PlainSymbol(symbols::PlainSymbol::new($name)),
|ns| $t::NamespacedSymbol(symbols::NamespacedSymbol::new(ns, $name)))
}
}
/// Converts `name` into a plain or namespaced value keyword, depending on
/// whether or not `namespace` is given.
///
/// # Examples
///
/// ```
/// # use edn::types::to_keyword;
/// # use edn::types::Value;
/// # use edn::symbols;
/// let value = to_keyword!("foo", "bar", Value);
/// assert_eq!(value, Value::NamespacedKeyword(symbols::NamespacedKeyword::new("foo", "bar")));
///
/// let value = to_keyword!(None, "baz", Value);
/// assert_eq!(value, Value::Keyword(symbols::Keyword::new("baz")));
///
/// let value = to_keyword!("foo", "bar", SpannedValue);
/// assert_eq!(value.into(), to_keyword!("foo", "bar", Value));
///
/// let value = to_keyword!(None, "baz", SpannedValue);
/// assert_eq!(value.into(), to_keyword!(None, "baz", Value));
/// ```
macro_rules! to_keyword {
( $namespace:expr, $name:expr, $t:tt ) => {
$namespace.into().map_or_else(
|| $t::Keyword(symbols::Keyword::new($name)),
|ns| $t::NamespacedKeyword(symbols::NamespacedKeyword::new(ns, $name)))
}
}
/// Implements multiple is*, as*, into* and from* methods common to
/// both Value and SpannedValue.
macro_rules! def_common_value_methods {
( $t:tt<$tchild:tt> ) => {
def_is!(is_nil, $t::Nil);
def_is!(is_boolean, $t::Boolean(_));
def_is!(is_integer, $t::Integer(_));
def_is!(is_instant, $t::Instant(_));
def_is!(is_big_integer, $t::BigInteger(_));
def_is!(is_float, $t::Float(_));
def_is!(is_text, $t::Text(_));
def_is!(is_uuid, $t::Uuid(_));
def_is!(is_symbol, $t::PlainSymbol(_));
def_is!(is_namespaced_symbol, $t::NamespacedSymbol(_));
def_is!(is_keyword, $t::Keyword(_));
def_is!(is_namespaced_keyword, $t::NamespacedKeyword(_));
def_is!(is_vector, $t::Vector(_));
def_is!(is_list, $t::List(_));
def_is!(is_set, $t::Set(_));
def_is!(is_map, $t::Map(_));
/// `as_nil` does not use the macro as it does not have an underlying
/// value, and returns `Option<()>`.
pub fn as_nil(&self) -> Option<()> {
match *self { $t::Nil => Some(()), _ => None }
}
def_as!(as_boolean, $t::Boolean, bool,);
def_as!(as_integer, $t::Integer, i64,);
def_as!(as_instant, $t::Instant, DateTime<Utc>,);
def_as!(as_float, $t::Float, f64, |v: OrderedFloat<f64>| v.into_inner());
def_as_ref!(as_big_integer, $t::BigInteger, BigInt);
def_as_ref!(as_ordered_float, $t::Float, OrderedFloat<f64>);
def_as_ref!(as_text, $t::Text, String);
def_as_ref!(as_uuid, $t::Uuid, Uuid);
def_as_ref!(as_symbol, $t::PlainSymbol, symbols::PlainSymbol);
def_as_ref!(as_namespaced_symbol, $t::NamespacedSymbol, symbols::NamespacedSymbol);
def_as_ref!(as_keyword, $t::Keyword, symbols::Keyword);
def_as_ref!(as_namespaced_keyword, $t::NamespacedKeyword, symbols::NamespacedKeyword);
def_as_ref!(as_vector, $t::Vector, Vec<$tchild>);
def_as_ref!(as_list, $t::List, LinkedList<$tchild>);
def_as_ref!(as_set, $t::Set, BTreeSet<$tchild>);
def_as_ref!(as_map, $t::Map, BTreeMap<$tchild, $tchild>);
def_into!(into_boolean, $t::Boolean, bool,);
def_into!(into_integer, $t::Integer, i64,);
def_into!(into_instant, $t::Instant, DateTime<Utc>,);
def_into!(into_big_integer, $t::BigInteger, BigInt,);
def_into!(into_ordered_float, $t::Float, OrderedFloat<f64>,);
def_into!(into_float, $t::Float, f64, |v: OrderedFloat<f64>| v.into_inner());
def_into!(into_text, $t::Text, String,);
def_into!(into_uuid, $t::Uuid, Uuid,);
def_into!(into_symbol, $t::PlainSymbol, symbols::PlainSymbol,);
def_into!(into_namespaced_symbol, $t::NamespacedSymbol, symbols::NamespacedSymbol,);
def_into!(into_keyword, $t::Keyword, symbols::Keyword,);
def_into!(into_namespaced_keyword, $t::NamespacedKeyword, symbols::NamespacedKeyword,);
def_into!(into_vector, $t::Vector, Vec<$tchild>,);
def_into!(into_list, $t::List, LinkedList<$tchild>,);
def_into!(into_set, $t::Set, BTreeSet<$tchild>,);
def_into!(into_map, $t::Map, BTreeMap<$tchild, $tchild>,);
def_from_option!(from_bigint, $t, $t::BigInteger, &str, |src: &str| src.parse::<BigInt>().ok());
def_from!(from_float, $t, $t::Float, f64, |src: f64| OrderedFloat::from(src));
def_from!(from_ordered_float, $t, $t::Float, OrderedFloat<f64>,);
pub fn from_symbol<'a, T: Into<Option<&'a str>>>(namespace: T, name: &str) -> $t {
to_symbol!(namespace, name, $t)
}
pub fn from_keyword<'a, T: Into<Option<&'a str>>>(namespace: T, name: &str) -> $t {
to_keyword!(namespace, name, $t)
}
fn precedence(&self) -> i32 {
match *self {
$t::Nil => 0,
$t::Boolean(_) => 1,
$t::Integer(_) => 2,
$t::BigInteger(_) => 3,
$t::Float(_) => 4,
$t::Instant(_) => 5,
$t::Text(_) => 6,
$t::Uuid(_) => 7,
$t::PlainSymbol(_) => 8,
$t::NamespacedSymbol(_) => 9,
$t::Keyword(_) => 10,
$t::NamespacedKeyword(_) => 11,
$t::Vector(_) => 12,
$t::List(_) => 13,
$t::Set(_) => 14,
$t::Map(_) => 15,
}
}
pub fn is_collection(&self) -> bool {
match *self {
$t::Nil => false,
$t::Boolean(_) => false,
$t::Integer(_) => false,
$t::Instant(_) => false,
$t::BigInteger(_) => false,
$t::Float(_) => false,
$t::Text(_) => false,
$t::Uuid(_) => false,
$t::PlainSymbol(_) => false,
$t::NamespacedSymbol(_) => false,
$t::Keyword(_) => false,
$t::NamespacedKeyword(_) => false,
$t::Vector(_) => true,
$t::List(_) => true,
$t::Set(_) => true,
$t::Map(_) => true,
}
}
pub fn is_atom(&self) -> bool {
!self.is_collection()
}
pub fn into_atom(self) -> Option<$t> {
if self.is_atom() {
Some(self)
} else {
None
}
}
}
}
/// Compares Value or SpannedValue instances and returns Ordering.
/// Used in `Ord` implementations.
macro_rules! def_common_value_ord {
( $t:tt, $value:expr, $other:expr ) => {
match ($value, $other) {
(&$t::Nil, &$t::Nil) => Ordering::Equal,
(&$t::Boolean(a), &$t::Boolean(b)) => b.cmp(&a),
(&$t::Integer(a), &$t::Integer(b)) => b.cmp(&a),
(&$t::Instant(a), &$t::Instant(b)) => b.cmp(&a),
(&$t::BigInteger(ref a), &$t::BigInteger(ref b)) => b.cmp(a),
(&$t::Float(ref a), &$t::Float(ref b)) => b.cmp(a),
(&$t::Text(ref a), &$t::Text(ref b)) => b.cmp(a),
(&$t::Uuid(ref a), &$t::Uuid(ref b)) => b.cmp(a),
(&$t::PlainSymbol(ref a), &$t::PlainSymbol(ref b)) => b.cmp(a),
(&$t::NamespacedSymbol(ref a), &$t::NamespacedSymbol(ref b)) => b.cmp(a),
(&$t::Keyword(ref a), &$t::Keyword(ref b)) => b.cmp(a),
(&$t::NamespacedKeyword(ref a), &$t::NamespacedKeyword(ref b)) => b.cmp(a),
(&$t::Vector(ref a), &$t::Vector(ref b)) => b.cmp(a),
(&$t::List(ref a), &$t::List(ref b)) => b.cmp(a),
(&$t::Set(ref a), &$t::Set(ref b)) => b.cmp(a),
(&$t::Map(ref a), &$t::Map(ref b)) => b.cmp(a),
_ => $value.precedence().cmp(&$other.precedence())
}
}
}
/// Converts a Value or SpannedValue to string, given a formatter.
// TODO: Make sure float syntax is correct, handle NaN and escaping.
// See https://github.com/mozilla/mentat/issues/232
macro_rules! def_common_value_display {
( $t:tt, $value:expr, $f:expr ) => {
match *$value {
$t::Nil => write!($f, "nil"),
$t::Boolean(v) => write!($f, "{}", v),
$t::Integer(v) => write!($f, "{}", v),
$t::Instant(v) => write!($f, "{}", v),
$t::BigInteger(ref v) => write!($f, "{}N", v),
// TODO: make sure float syntax is correct.
$t::Float(ref v) => {
if *v == OrderedFloat(f64::INFINITY) {
write!($f, "#f +Infinity")
} else if *v == OrderedFloat(f64::NEG_INFINITY) {
write!($f, "#f -Infinity")
} else if *v == OrderedFloat(f64::NAN) {
write!($f, "#f NaN")
} else {
write!($f, "{}", v)
}
}
// TODO: EDN escaping.
$t::Text(ref v) => write!($f, "\"{}\"", v),
$t::Uuid(ref u) => write!($f, "#uuid \"{}\"", u.hyphenated().to_string()),
$t::PlainSymbol(ref v) => v.fmt($f),
$t::NamespacedSymbol(ref v) => v.fmt($f),
$t::Keyword(ref v) => v.fmt($f),
$t::NamespacedKeyword(ref v) => v.fmt($f),
$t::Vector(ref v) => {
write!($f, "[")?;
for x in v {
write!($f, " {}", x)?;
}
write!($f, " ]")
}
$t::List(ref v) => {
write!($f, "(")?;
for x in v {
write!($f, " {}", x)?;
}
write!($f, " )")
}
$t::Set(ref v) => {
write!($f, "#{{")?;
for x in v {
write!($f, " {}", x)?;
}
write!($f, " }}")
}
$t::Map(ref v) => {
write!($f, "{{")?;
for (key, val) in v {
write!($f, " {} {}", key, val)?;
}
write!($f, " }}")
}
}
}
}
macro_rules! def_common_value_impl {
( $t:tt<$tchild:tt> ) => {
impl $t {
def_common_value_methods!($t<$tchild>);
}
impl PartialOrd for $t {
fn partial_cmp(&self, other: &$t) -> Option<Ordering> {
Some(self.cmp(other))
}
}
impl Ord for $t {
fn cmp(&self, other: &$t) -> Ordering {
def_common_value_ord!($t, self, other)
}
}
impl Display for $t {
fn fmt(&self, f: &mut Formatter) -> ::std::fmt::Result {
def_common_value_display!($t, self, f)
}
}
}
}
def_common_value_impl!(Value<Value>);
def_common_value_impl!(SpannedValue<ValueAndSpan>);
impl ValueAndSpan {
pub fn without_spans(self) -> Value {
self.inner.into()
}
}
impl PartialOrd for ValueAndSpan {
fn partial_cmp(&self, other: &ValueAndSpan) -> Option<Ordering> {
Some(self.cmp(other))
}
}
impl Ord for ValueAndSpan {
fn cmp(&self, other: &ValueAndSpan) -> Ordering {
self.inner.cmp(&other.inner)
}
}
impl Display for ValueAndSpan {
fn fmt(&self, f: &mut Formatter) -> ::std::fmt::Result {
self.inner.fmt(f)
}
}
pub trait FromMicros {
fn from_micros(ts: i64) -> Self;
}
impl FromMicros for DateTime<Utc> {
fn from_micros(ts: i64) -> Self {
Utc.timestamp(ts / 1_000_000, ((ts % 1_000_000).abs() as u32) * 1_000)
}
}
pub trait ToMicros {
fn to_micros(&self) -> i64;
}
impl ToMicros for DateTime<Utc> {
fn to_micros(&self) -> i64 {
let major: i64 = self.timestamp() * 1_000_000;
let minor: i64 = self.timestamp_subsec_micros() as i64;
major + minor
}
}
#[cfg(test)]
mod test {
extern crate chrono;
extern crate ordered_float;
extern crate num;
use super::*;
use std::collections::{BTreeSet, BTreeMap, LinkedList};
use std::cmp::{Ordering};
use std::iter::FromIterator;
use std::f64;
use parse;
use chrono::{
DateTime,
Utc,
};
use num::BigInt;
use ordered_float::OrderedFloat;
#[test]
fn test_micros_roundtrip() {
let ts_micros: i64 = 1493399581314000;
let dt = DateTime::<Utc>::from_micros(ts_micros);
assert_eq!(dt.to_micros(), ts_micros);
}
#[test]
fn test_value_from() {
assert_eq!(Value::from_float(42f64), Value::Float(OrderedFloat::from(42f64)));
assert_eq!(Value::from_ordered_float(OrderedFloat::from(42f64)), Value::Float(OrderedFloat::from(42f64)));
assert_eq!(Value::from_bigint("42").unwrap(), Value::BigInteger(BigInt::from(42)));
}
#[test]
fn test_print_edn() {
assert_eq!("1234N", Value::from_bigint("1234").unwrap().to_string());
let string = "[ 1 2 ( 3.14 ) #{ 4N } { foo/bar 42 :baz/boz 43 } [ ] :five :six/seven eight nine/ten true false nil #f NaN #f -Infinity #f +Infinity ]";
let data = Value::Vector(vec![
Value::Integer(1),
Value::Integer(2),
Value::List(LinkedList::from_iter(vec![
Value::from_float(3.14)
])),
Value::Set(BTreeSet::from_iter(vec![
Value::from_bigint("4").unwrap()
])),
Value::Map(BTreeMap::from_iter(vec![
(Value::from_symbol("foo", "bar"), Value::Integer(42)),
(Value::from_keyword("baz", "boz"), Value::Integer(43))
])),
Value::Vector(vec![]),
Value::from_keyword(None, "five"),
Value::from_keyword("six", "seven"),
Value::from_symbol(None, "eight"),
Value::from_symbol("nine", "ten"),
Value::Boolean(true),
Value::Boolean(false),
Value::Nil,
Value::from_float(f64::NAN),
Value::from_float(f64::NEG_INFINITY),
Value::from_float(f64::INFINITY),
]);
assert_eq!(string, data.to_string());
assert_eq!(string, parse::value(&data.to_string()).unwrap().to_string());
assert_eq!(string, parse::value(&data.to_string()).unwrap().without_spans().to_string());
}
#[test]
fn test_ord() {
// TODO: Check we follow the equality rules at the bottom of https://github.com/edn-format/edn
assert_eq!(Value::Nil.cmp(&Value::Nil), Ordering::Equal);
assert_eq!(Value::Boolean(false).cmp(&Value::Boolean(true)), Ordering::Greater);
assert_eq!(Value::Integer(1).cmp(&Value::Integer(2)), Ordering::Greater);
assert_eq!(Value::from_bigint("1").cmp(&Value::from_bigint("2")), Ordering::Greater);
assert_eq!(Value::from_float(1f64).cmp(&Value::from_float(2f64)), Ordering::Greater);
assert_eq!(Value::Text("1".to_string()).cmp(&Value::Text("2".to_string())), Ordering::Greater);
assert_eq!(Value::from_symbol("a", "b").cmp(&Value::from_symbol("c", "d")), Ordering::Greater);
assert_eq!(Value::from_symbol(None, "a").cmp(&Value::from_symbol(None, "b")), Ordering::Greater);
assert_eq!(Value::from_keyword(":a", ":b").cmp(&Value::from_keyword(":c", ":d")), Ordering::Greater);
assert_eq!(Value::from_keyword(None, ":a").cmp(&Value::from_keyword(None, ":b")), Ordering::Greater);
assert_eq!(Value::Vector(vec![]).cmp(&Value::Vector(vec![])), Ordering::Equal);
assert_eq!(Value::List(LinkedList::new()).cmp(&Value::List(LinkedList::new())), Ordering::Equal);
assert_eq!(Value::Set(BTreeSet::new()).cmp(&Value::Set(BTreeSet::new())), Ordering::Equal);
assert_eq!(Value::Map(BTreeMap::new()).cmp(&Value::Map(BTreeMap::new())), Ordering::Equal);
}
}
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