mirror of
https://github.com/JakeHillion/object-introspection.git
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107 lines
2.8 KiB
Plaintext
107 lines
2.8 KiB
Plaintext
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* This is the bison grammar responsible for generating the ObjectIntrospection::OIParser class.
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* This class gives us a number of things worth calling out here if only to
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* remind me later :-):
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*
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* - A variant interface that replaces the C union interface for the
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* parsers semantic values. Enabled by setting 'api.value.type variant' below.
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*/
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%skeleton "lalr1.cc"
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%defines
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%define api.namespace {ObjectIntrospection}
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%define api.parser.class {OIParser}
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%define parse.trace
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%define parse.error verbose
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%define parse.lac full
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%code requires{
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#include <list>
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namespace ObjectIntrospection {
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class OIScanner;
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}
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class ParseData;
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}
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/*
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* ObjectIntrospection::OI_Parser constructor parameters. The scanner object is produced
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* by flex and is derived from the yyFlexLexer class. The parser calls
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* its yylex() implementation to generate input tokens. The ParseData
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* object is spopulated by the lexer/parser introspection specifications
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* specified in the input file.
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*/
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%parse-param { OIScanner &scanner }
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%parse-param { ParseData &pdata }
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%code{
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#include <iostream>
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#include <cstdlib>
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#include <fstream>
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#include <string>
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#include <glog/logging.h>
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#include "oi/OIParser.h"
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#include "oi/OILexer.h"
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#undef yylex
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#define yylex scanner.yylex
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}
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%define api.value.type variant
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%define parse.assert
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%locations
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%token <char>OI_COLON
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%token <std::string>OI_PROBETYPE
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%token <std::string>OI_FUNC
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%token <std::list<std::string>>OI_ARG
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%token <char>OI_COMMA
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%token OI_EOF 0
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%type <std::list<std::string>> oi_args
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%%
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script: oi_blocks OI_EOF
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oi_blocks: oi_block | oi_blocks oi_block
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oi_args: OI_ARG OI_COMMA oi_args
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{
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$$ = std::move($3);
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$$.push_front(std::move($1.front()));
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}
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| OI_ARG;
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oi_block: OI_PROBETYPE OI_COLON OI_FUNC OI_COLON oi_args
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{
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pdata.addReq(std::move($1), std::move($3), std::move($5));
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}
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| OI_PROBETYPE OI_COLON OI_FUNC
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{
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pdata.addReq(std::move($1), std::move($3), {});
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}
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;
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%%
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void
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ObjectIntrospection::OIParser::error(const location_type &l, const std::string &err_message)
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{
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LOG(ERROR) << "OI Parse Error: " << err_message << " at " << l;
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}
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