mentat/edn/src/lib.rs
Nick Alexander cbffe5e545 Use rust-peg for tx parsing.
There are few reasons to do this:

- it's difficult to add symbol interning to combine-based parsers like
  tx-parser -- literally every type changes to reflect the interner,
  and that means every convenience macro we've built needs to chagne.
  It's trivial to add interning to rust-peg-based parsers.

- combine has rolled forward to 3.2, and I spent a similar amount of
  time investigating how to upgrade tx-parser (to take advantage of
  the new parser! macros in combine that I think are necessary for
  adapting to changing types) as I did just converting to rust-peg.

- it's easy to improve the error messages in rust-peg, where-as I have
  tried twice to improve the nested error messages in combine and am
  stumped.

- it's roughly 4x faster to parse strings directly as opposed to
  edn::ValueAndSpan, and it'll be even better when we intern directly.
2018-05-10 10:24:05 -07:00

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Rust

// 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.
extern crate chrono;
extern crate itertools;
extern crate num;
extern crate ordered_float;
extern crate pretty;
extern crate uuid;
#[cfg(feature = "serde_support")]
extern crate serde;
#[cfg(feature = "serde_support")]
#[macro_use]
extern crate serde_derive;
pub mod entities;
pub mod symbols;
pub mod types;
pub mod pretty_print;
pub mod utils;
pub mod matcher;
pub mod parse {
include!(concat!(env!("OUT_DIR"), "/edn.rs"));
}
// Re-export the types we use.
pub use chrono::{DateTime, Utc};
pub use num::BigInt;
pub use ordered_float::OrderedFloat;
pub use uuid::Uuid;
// Export from our modules.
pub use parse::ParseError;
pub use uuid::ParseError as UuidParseError;
pub use types::{
FromMicros,
Span,
SpannedValue,
ToMicros,
Value,
ValueAndSpan,
};
pub use symbols::{
Keyword,
NamespacedKeyword,
NamespacedSymbol,
PlainSymbol,
};