spanparsing.h

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// Copyright (c) 2018-2022 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#ifndef BITCOIN_UTIL_SPANPARSING_H
#define BITCOIN_UTIL_SPANPARSING_H
 
#include <span.h>
 
#include <string>
#include <string_view>
#include <vector>
 
namespace spanparsing {
 
bool Const(const std::string& str, Span<const char>& sp);
 
bool Func(const std::string& str, Span<const char>& sp);
 
Span<const char> Expr(Span<const char>& sp);
 
template <typename T = Span<const char>>
std::vector<T> Split(const Span<const char>& sp, std::string_view separators)
{
    std::vector<T> ret;
    auto it = sp.begin();
    auto start = it;
    while (it != sp.end()) {
        if (separators.find(*it) != std::string::npos) {
            ret.emplace_back(start, it);
            start = it + 1;
        }
        ++it;
    }
    ret.emplace_back(start, it);
    return ret;
}
 
template <typename T = Span<const char>>
std::vector<T> Split(const Span<const char>& sp, char sep)
{
    return Split<T>(sp, std::string_view{&sep, 1});
}
 
} // namespace spanparsing
 
#endif // BITCOIN_UTIL_SPANPARSING_H