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737c1e07ee
* Update marker before and after fill() operation in cpplexer * A basic test case for trigraph "pound" (octothorpe) on fill boundary (detects the marker issue) This change resolves #202 --------- Co-authored-by: Chris Chisolm <chris_chisolm@intuit.com> Co-authored-by: Jeff Trull <edaskel@att.net>
75 lines
2.0 KiB
C++
75 lines
2.0 KiB
C++
// Copyright 2024 Jeff Trull.
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//
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// Distributed under the Boost Software License, Version 1.0.
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//
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// See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt
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// There are some tricky corner cases that occur when Wave handles large inputs.
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// Tokens at, near, or crossing the boundary at which a "fill" occurs can
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// interact in unexpected ways. This test is intended to increase code
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// coverage for such situations.
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#include <boost/wave/cpplexer/re2clex/cpp_re.hpp> // for BOOST_WAVE_BSIZE
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#include <boost/wave.hpp>
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#include <boost/wave/token_ids.hpp>
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#include <boost/wave/cpplexer/cpp_lex_token.hpp>
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#include <boost/wave/cpplexer/cpp_lex_iterator.hpp>
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#include <string>
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using token_t = boost::wave::cpplexer::lex_token<>;
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using lex_iter_t = boost::wave::cpplexer::lex_iterator<token_t>;
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using ctx_t = boost::wave::context<
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std::string::iterator, lex_iter_t,
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boost::wave::iteration_context_policies::load_file_to_string,
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boost::wave::context_policies::default_preprocessing_hooks>;
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int main() {
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using namespace boost::wave;
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// construct input with a trigraph in a tricky spot
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constexpr std::size_t space_count = BOOST_WAVE_BSIZE - 18;
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auto inp_txt = std::string(space_count, ' ') + ";";
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// add in pound trigraph one character at a time
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// otherwise, the string literal may get translated by the compiler
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inp_txt.push_back('?');
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inp_txt.push_back('?');
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inp_txt.push_back('=');
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inp_txt += " auto foo = bar;\n";
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ctx_t ctx( inp_txt.begin(), inp_txt.end(), "longfile.cpp" );
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auto it = ctx.begin();
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if (token_id(*it) != T_SPACE)
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return 1;
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if (it->get_value().size() != space_count)
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return 2;
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++it;
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if (token_id(*it) != T_SEMICOLON)
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return 3;
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++it;
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if (token_id(*it) != T_POUND_TRIGRAPH)
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return 4;
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++it;
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if (token_id(*it) != T_SPACE)
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return 5;
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++it;
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if (token_id(*it) != T_AUTO)
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return 6;
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return 0;
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}
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