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Diffstat (limited to 'src/output_lr0.cpp')
| -rw-r--r-- | src/output_lr0.cpp | 126 |
1 files changed, 0 insertions, 126 deletions
diff --git a/src/output_lr0.cpp b/src/output_lr0.cpp deleted file mode 100644 index b492744..0000000 --- a/src/output_lr0.cpp +++ /dev/null @@ -1,126 +0,0 @@ -/* - Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net> - All rights reserved. - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are met: - - 1. Redistributions of source code must retain the above copyright notice, - this list of conditions and the following disclaimer. - 2. Redistributions in binary form must reproduce the above copyright notice, - this list of conditions and the following disclaimer in the documentation - and/or other materials provided with the distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE - DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE - FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR - SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER - CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, - OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -*/ - - -#include "output_lr0.hpp" - - -namespace solar { - -void output_lr0_t::emit_state_shift(unsigned state) { - std::fprintf(source_file, "\t\t\tswitch (token) {\n"); - - if (generator->get_shifts().find(std::make_pair(state, symbol_t::make_nonterm(""))) != generator->get_shifts().end()) { - std::fprintf(source_file, "\t\t\tcase 0:\n"); - std::fprintf(source_file, "\t\t\t\treturn 0;\n\n"); - } - - for (const auto &token : generator->get_terminals()) { - auto it = generator->get_shifts().find(std::make_pair(state, token)); - if (it == generator->get_shifts().end()) - continue; - - std::fprintf(source_file, "\t\t\tcase %s:\n", symbol_case(token).c_str()); - std::fprintf(source_file, "\t\t\t\tparser->stack[++parser->top].state = %u;\n", unsigned(it->second)); - std::fprintf(source_file, "\t\t\t\treturn 1;\n\n"); - } - - std::fprintf(source_file, "\t\t\tdefault:\n"); - std::fprintf(source_file, "\t\t\t\treturn -1;\n"); - - std::fprintf(source_file, "\t\t\t}\n"); -} - -void output_lr0_t::emit_state_reduce(const item_t &item, int rule_id) { - const auto &rhs = item.get_rhs(); - if (rhs.size()) - std::fprintf(source_file, "\t\t\tparser->top -= %u;\n", unsigned(rhs.size())); - - if (rule_id >= 0) { - const std::string &type = generator->get_grammar().get_nonterm_type(item.get_lhs()); - - std::fprintf(source_file, "\t\t\t"); - if (!type.empty()) - std::fprintf(source_file, "result.symbol_%s = ", item.get_lhs().c_str()); - std::fprintf(source_file, "%sreduce_%i(", prefix(), rule_id); - - bool empty = true; - const auto &vars = generator->get_grammar().rules[rule_id].variables; - for (unsigned i = 0; i < vars.size(); i++) { - if (vars[i].first.empty()) - continue; - - if (!empty) - std::fprintf(source_file, ", "); - - std::fprintf(source_file, "parser->stack[parser->top + %u].value.%s", i, symbol_values[rhs[i]].c_str()); - empty = false; - } - - for (const auto &arg : generator->get_grammar().extra_args) { - if (!empty) - std::fprintf(source_file, ", "); - - std::fprintf(source_file, "%s", arg.second.c_str()); - - empty = false; - } - - std::fprintf(source_file, ");\n"); - - for (unsigned i = 0; i < vars.size(); i++) { - if (!vars[i].second) - continue; - - auto it = generator->get_grammar().destructors.find(rhs[i]); - if (it == generator->get_grammar().destructors.end()) - continue; - - std::fprintf(source_file, "\t\t\t%s(parser->stack[parser->top + %u].value.%s);\n", it->second.c_str(), i, symbol_values[rhs[i]].c_str()); - } - - if (!type.empty()) - std::fprintf(source_file, "\t\t\tparser->stack[parser->top].value.symbol_%s = result.symbol_%s;\n", item.get_lhs().c_str(), item.get_lhs().c_str()); - } - - emit_gotos(item.get_lhs()); -} - -void output_lr0_t::emit_state(unsigned state) { - std::fprintf(source_file, "\t\tcase %u:\n", state); - - auto it = generator->get_reductions().find(state); - if (it == generator->get_reductions().end()) { - emit_state_shift(state); - } - else { - const rule_t &rule = generator->get_grammar().rules[it->second]; - emit_state_reduce(rule.item, rule.action.empty() ? -1 : it->second); - } - - std::fprintf(source_file, "\t\t\tbreak;\n\n"); -} - -} |