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/*************************************************************************
* Copyright (C) 2018-2022 Blue Brain Project
*
* This file is part of NMODL distributed under the terms of the GNU
* Lesser General Public License. See top-level LICENSE file for details.
*************************************************************************/
#include <catch2/catch_test_macros.hpp>
#include "ast/program.hpp"
#include "parser/nmodl_driver.hpp"
#include "test/unit/utils/test_utils.hpp"
#include "visitors/checkparent_visitor.hpp"
#include "visitors/constant_folder_visitor.hpp"
#include "visitors/nmodl_visitor.hpp"
#include "visitors/symtab_visitor.hpp"
using namespace nmodl;
using namespace visitor;
using namespace test;
using namespace test_utils;
using nmodl::parser::NmodlDriver;
//=============================================================================
// Constant folding tests
//=============================================================================
std::string run_constant_folding_visitor(const std::string& text) {
NmodlDriver driver;
const auto& ast = driver.parse_string(text);
SymtabVisitor().visit_program(*ast);
ConstantFolderVisitor().visit_program(*ast);
std::stringstream stream;
NmodlPrintVisitor(stream).visit_program(*ast);
// check that, after visitor rearrangement, parents are still up-to-date
CheckParentVisitor().check_ast(*ast);
return stream.str();
}
SCENARIO("Perform constant folder on NMODL constructs") {
GIVEN("Simple integer expression") {
std::string nmodl_text = R"(
PROCEDURE dummy() {
a = 1 + 2
}
)";
std::string expected_text = R"(
PROCEDURE dummy() {
a = 3
}
)";
THEN("successfully folds") {
auto result = run_constant_folding_visitor(nmodl_text);
REQUIRE(reindent_text(result) == reindent_text(expected_text));
}
}
GIVEN("Simple double expression") {
std::string nmodl_text = R"(
PROCEDURE dummy() {
a = 1.1 + 2e-10
}
)";
std::string expected_text = R"(
PROCEDURE dummy() {
a = 1.1000000002
}
)";
THEN("successfully folds") {
auto result = run_constant_folding_visitor(nmodl_text);
REQUIRE(reindent_text(result) == reindent_text(expected_text));
}
}
GIVEN("Complex expression") {
std::string nmodl_text = R"(
PROCEDURE dummy() {
a = 1 + (2) + (2 / 2) + (((1+((2)))))
}
)";
std::string expected_text = R"(
PROCEDURE dummy() {
a = 7
}
)";
THEN("successfully folds") {
auto result = run_constant_folding_visitor(nmodl_text);
REQUIRE(reindent_text(result) == reindent_text(expected_text));
}
}
GIVEN("Integer expression with define statement") {
std::string nmodl_text = R"(
DEFINE N 10
PROCEDURE dummy() {
a = N + (2*N) + (N / 2) + (((1+((N)))))
FROM i = 0 TO N-2 {
}
}
)";
std::string expected_text = R"(
DEFINE N 10
PROCEDURE dummy() {
a = 46
FROM i = 0 TO 8 {
}
}
)";
THEN("successfully folds") {
auto result = run_constant_folding_visitor(nmodl_text);
REQUIRE(reindent_text(result) == reindent_text(expected_text));
}
}
GIVEN("Only fold part of the statement") {
std::string nmodl_text = R"(
DEFINE N 10
PROCEDURE dummy() {
a = N + 2.0 + b
c = a + d
d = 2^3
e = 2 || 3
}
)";
std::string expected_text = R"(
DEFINE N 10
PROCEDURE dummy() {
a = 12+b
c = a+d
d = 2^3
e = 2 || 3
}
)";
THEN("successfully folds and keep other statements untouched") {
auto result = run_constant_folding_visitor(nmodl_text);
REQUIRE(reindent_text(result) == reindent_text(expected_text));
}
}
GIVEN("Don't remove parentheses if not simplifying") {
std::string nmodl_text = R"(
DEFINE N 10
PROCEDURE dummy() {
a = ((N+1)+5)*(c+1+N)/(b - 2)
}
)";
std::string expected_text = R"(
DEFINE N 10
PROCEDURE dummy() {
a = 16*(c+1+10)/(b-2)
}
)";
THEN("successfully folds and keep other statements untouched") {
auto result = run_constant_folding_visitor(nmodl_text);
REQUIRE(reindent_text(result) == reindent_text(expected_text));
}
}
}
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