106 lines
3.9 KiB
C++
106 lines
3.9 KiB
C++
/* ----------------------------------------------------------------------------
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* GTSAM Copyright 2010, Georgia Tech Research Corporation,
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* Atlanta, Georgia 30332-0415
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* All Rights Reserved
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* Authors: Frank Dellaert, et al. (see THANKS for the full author list)
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* See LICENSE for the license information
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* -------------------------------------------------------------------------- */
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/**
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* Unit test for Boost's awesome Spirit parser
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* Author: Frank Dellaert
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**/
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#include <boost/spirit/include/classic_core.hpp>
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#include <boost/spirit/include/classic_push_back_actor.hpp>
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#include <CppUnitLite/TestHarness.h>
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using namespace std;
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using namespace BOOST_SPIRIT_CLASSIC_NS;
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typedef rule<BOOST_SPIRIT_CLASSIC_NS::phrase_scanner_t> Rule;
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/* ************************************************************************* */
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// lexeme_d turns off white space skipping
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// http://www.boost.org/doc/libs/1_37_0/libs/spirit/classic/doc/directives.html
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Rule name_p = lexeme_d[alpha_p >> *(alnum_p | '_')];
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Rule className_p = lexeme_d[upper_p >> *(alnum_p | '_')];
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Rule methodName_p = lexeme_d[lower_p >> *(alnum_p | '_')];
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Rule basisType_p = (str_p("string") | "bool" | "size_t" | "int" | "double" | "Vector" | "Matrix");
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/* ************************************************************************* */
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TEST( spirit, real ) {
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// check if we can parse 8.99 as a real
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CHECK(parse("8.99", real_p, space_p).full);
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// make sure parsing fails on this one
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CHECK(!parse("zztop", real_p, space_p).full);
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}
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/* ************************************************************************* */
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TEST( spirit, string ) {
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// check if we can parse a string
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CHECK(parse("double", str_p("double"), space_p).full);
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}
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/* ************************************************************************* */
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TEST( spirit, sequence ) {
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// check that we skip white space
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CHECK(parse("int int", str_p("int") >> *str_p("int"), space_p).full);
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CHECK(parse("int --- - -- -", str_p("int") >> *ch_p('-'), space_p).full);
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CHECK(parse("const \t string", str_p("const") >> str_p("string"), space_p).full);
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// not that (see spirit FAQ) the vanilla rule<> does not deal with whitespace
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rule<>vanilla_p = str_p("const") >> str_p("string");
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CHECK(!parse("const \t string", vanilla_p, space_p).full);
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// to fix it, we need to use <phrase_scanner_t>
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rule<phrase_scanner_t>phrase_level_p = str_p("const") >> str_p("string");
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CHECK(parse("const \t string", phrase_level_p, space_p).full);
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}
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/* ************************************************************************* */
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// parser for interface files
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// const string reference reference
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Rule constStringRef_p =
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str_p("const") >> "string" >> '&';
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// class reference
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Rule classRef_p = className_p >> '&';
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// const class reference
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Rule constClassRef_p = str_p("const") >> classRef_p;
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// method parsers
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Rule constMethod_p = basisType_p >> methodName_p >> '(' >> ')' >> "const" >> ';';
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/* ************************************************************************* */
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TEST( spirit, basisType_p ) {
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CHECK(!parse("Point3", basisType_p, space_p).full);
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CHECK(parse("string", basisType_p, space_p).full);
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}
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/* ************************************************************************* */
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TEST( spirit, className_p ) {
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CHECK(parse("Point3", className_p, space_p).full);
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}
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/* ************************************************************************* */
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TEST( spirit, classRef_p ) {
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CHECK(parse("Point3 &", classRef_p, space_p).full);
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CHECK(parse("Point3&", classRef_p, space_p).full);
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}
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/* ************************************************************************* */
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TEST( spirit, constMethod_p ) {
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CHECK(parse("double norm() const;", constMethod_p, space_p).full);
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}
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/* ************************************************************************* */
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int main() { TestResult tr; return TestRegistry::runAllTests(tr); }
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/* ************************************************************************* */
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