libgraphqlparser/GraphQLParser.cpp at master · graphql/libgraphqlparser · GitHub

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/**
 * Copyright 2019-present, GraphQL Foundation
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
*/

#include"GraphQLParser.h"

#include"AstNode.h"

#include"parser.tab.hpp"
#include"lexer.h"
#include"syntaxdefs.h"

namespacefacebook {
namespacegraphql {

// Given properly-configured yylex, run the parser and return the
// result.
static std::unique_ptr<ast::Node> doParse(constchar **outError, yyscan_t scanner, bool enableSchema) {
 Node *outAST = nullptr;
 yy::GraphQLParserImpl parser(enableSchema, &outAST, outError, scanner);
int failure = parser.parse();
if (failure) {
delete outAST;
 }
return !failure ? std::unique_ptr<ast::Node>(outAST) : nullptr;
}

static std::unique_ptr<ast::Node> parseStringImpl(constchar *text, constchar **error, bool enableSchema) {
yyscan_t scanner;
structLexerExtra extra;
yylex_init_extra(&extra, &scanner);
YY_BUFFER_STATE buffer = yy_scan_string(text, scanner);
yy_switch_to_buffer(buffer, scanner);

auto result = doParse(error, scanner, enableSchema);
yylex_destroy(scanner);
return result;
}

std::unique_ptr<ast::Node> parseString(constchar *text, constchar **error) {
returnparseStringImpl(text, error, false);
}

std::unique_ptr<ast::Node> parseStringWithExperimentalSchemaSupport(
constchar *text, constchar **error) {
returnparseStringImpl(text, error, true);
}

static std::unique_ptr<ast::Node> parseFileImpl(
FILE *file, constchar **error, bool enableSchema) {
yyscan_t scanner;
structLexerExtra extra;
yylex_init_extra(&extra, &scanner);
yyset_in(file, scanner);

auto result = doParse(error, scanner, enableSchema);
yylex_destroy(scanner);

return result;
}

std::unique_ptr<ast::Node> parseFile(FILE *file, constchar **error) {
returnparseFileImpl(file, error, false);
}

std::unique_ptr<ast::Node> parseFileWithExperimentalSchemaSupport(
FILE *file, constchar **error) {
returnparseFileImpl(file, error, true);
}


} // namespace graphql
} // namespace facebook