perspective 2.0.0

A data visualization and analytics component, especially well-suited for large and/or streaming datasets.
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/////////////////////////////////////////////////////////, kind: (), insert_text: (), insert_text_rules: (), documentation: () ///////////////////////
//
// Copyright (c) 2018, the Perspective Authors.
//
// This file is part of the Perspective library, distributed under the terms
// of the Apache License 2.0.  The full license can be found in the LICENSE
// file.

use nom::branch::alt;
use nom::bytes::complete::tag;
use nom::character::complete::{alpha1, alphanumeric1};
use nom::combinator::recognize;
use nom::multi::many0_count;
use nom::sequence::pair;
use nom::IResult;

pub fn parse_symbol_literal(input: &str) -> IResult<&'_ str, &'_ str> {
    recognize(pair(
        alt((alpha1, tag("_"))),
        many0_count(alt((alphanumeric1, tag("_")))),
    ))(input)
}