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/*
* Copyright 2019 by its authors. See AUTHORS.
*
* 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.
*/
#ifndef EOLIAN_CXX_GRAMMAR_INDENTATION_HPP
#define EOLIAN_CXX_GRAMMAR_INDENTATION_HPP
#include "generator.hpp"
#include "attributes.hpp"
namespace efl { namespace eolian { namespace grammar {
struct scope_tab_generator
{
constexpr scope_tab_generator(int n, int m = 4)
: n(n)
, m(m)
{}
constexpr scope_tab_generator(scope_tab_generator const&) = default;
scope_tab_generator& operator=(scope_tab_generator const&) = default;
template <typename OutputIterator, typename Context>
bool generate(OutputIterator sink, attributes::unused_type, Context const&) const
{
for(int i = 0; i != n; ++i)
{
for(int j = 0; j != m; ++j)
*sink++ = ' ';
}
return true;
}
constexpr scope_tab_generator inc(int nplus = 1) const
{
return {n+nplus, m};
}
constexpr scope_tab_generator dec(int nminus = 1) const
{
return {n-nminus, m};
}
int n;
int m;
};
template <>
struct is_eager_generator<scope_tab_generator> : std::true_type {};
template <>
struct is_generator<scope_tab_generator> : std::true_type {};
struct scope_tab_terminal
{
scope_tab_generator operator()(int n, int m = 4) const
{
return {n, m};
}
operator scope_tab_generator() const
{
return {1};
}
} const scope_tab = {};
template <>
struct is_generator<scope_tab_terminal> : std::true_type {};
scope_tab_generator as_generator(scope_tab_terminal)
{
return scope_tab_generator(1);
}
} } }
#endif
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