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// Copyright 2020 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/tint/lang/wgsl/reader/parser/helper_test.h"
namespace tint::wgsl::reader {
namespace {
TEST_F(WGSLParserTest, AssignmentStmt_Parses_ToVariable) {
auto p = parser("a = 123");
auto e = p->variable_updating_statement();
EXPECT_TRUE(e.matched);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e.value, nullptr);
auto* a = e->As<ast::AssignmentStatement>();
ASSERT_NE(a, nullptr);
ASSERT_NE(a->lhs, nullptr);
ASSERT_NE(a->rhs, nullptr);
EXPECT_EQ(a->source.range.begin.line, 1u);
EXPECT_EQ(a->source.range.begin.column, 3u);
EXPECT_EQ(a->source.range.end.line, 1u);
EXPECT_EQ(a->source.range.end.column, 4u);
ASSERT_TRUE(a->lhs->Is<ast::IdentifierExpression>());
auto* ident_expr = a->lhs->As<ast::IdentifierExpression>();
EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("a"));
ASSERT_TRUE(a->rhs->Is<ast::IntLiteralExpression>());
EXPECT_EQ(a->rhs->As<ast::IntLiteralExpression>()->value, 123);
EXPECT_EQ(a->rhs->As<ast::IntLiteralExpression>()->suffix,
ast::IntLiteralExpression::Suffix::kNone);
}
TEST_F(WGSLParserTest, AssignmentStmt_Parses_ToMember) {
auto p = parser("a.b.c[2].d = 123");
auto e = p->variable_updating_statement();
EXPECT_TRUE(e.matched);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e.value, nullptr);
auto* a = e->As<ast::AssignmentStatement>();
ASSERT_NE(a, nullptr);
ASSERT_NE(a->lhs, nullptr);
ASSERT_NE(a->rhs, nullptr);
EXPECT_EQ(a->source.range.begin.line, 1u);
EXPECT_EQ(a->source.range.begin.column, 12u);
EXPECT_EQ(a->source.range.end.line, 1u);
EXPECT_EQ(a->source.range.end.column, 13u);
ASSERT_TRUE(a->rhs->Is<ast::IntLiteralExpression>());
EXPECT_EQ(a->rhs->As<ast::IntLiteralExpression>()->value, 123);
EXPECT_EQ(a->rhs->As<ast::IntLiteralExpression>()->suffix,
ast::IntLiteralExpression::Suffix::kNone);
ASSERT_TRUE(a->lhs->Is<ast::MemberAccessorExpression>());
auto* mem = a->lhs->As<ast::MemberAccessorExpression>();
EXPECT_EQ(mem->member->symbol, p->builder().Symbols().Get("d"));
ASSERT_TRUE(mem->object->Is<ast::IndexAccessorExpression>());
auto* idx = mem->object->As<ast::IndexAccessorExpression>();
ASSERT_NE(idx->index, nullptr);
ASSERT_TRUE(idx->index->Is<ast::IntLiteralExpression>());
EXPECT_EQ(idx->index->As<ast::IntLiteralExpression>()->value, 2);
ASSERT_TRUE(idx->object->Is<ast::MemberAccessorExpression>());
mem = idx->object->As<ast::MemberAccessorExpression>();
EXPECT_EQ(mem->member->symbol, p->builder().Symbols().Get("c"));
ASSERT_TRUE(mem->object->Is<ast::MemberAccessorExpression>());
mem = mem->object->As<ast::MemberAccessorExpression>();
ASSERT_TRUE(mem->object->Is<ast::IdentifierExpression>());
auto* ident_expr = mem->object->As<ast::IdentifierExpression>();
EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("a"));
EXPECT_EQ(mem->member->symbol, p->builder().Symbols().Get("b"));
}
TEST_F(WGSLParserTest, AssignmentStmt_Parses_ToPhony) {
auto p = parser("_ = 123i");
auto e = p->variable_updating_statement();
EXPECT_TRUE(e.matched);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e.value, nullptr);
auto* a = e->As<ast::AssignmentStatement>();
ASSERT_NE(a, nullptr);
ASSERT_NE(a->lhs, nullptr);
ASSERT_NE(a->rhs, nullptr);
EXPECT_EQ(a->source.range.begin.line, 1u);
EXPECT_EQ(a->source.range.begin.column, 3u);
EXPECT_EQ(a->source.range.end.line, 1u);
EXPECT_EQ(a->source.range.end.column, 4u);
ASSERT_TRUE(a->rhs->Is<ast::IntLiteralExpression>());
EXPECT_EQ(a->rhs->As<ast::IntLiteralExpression>()->value, 123);
EXPECT_EQ(a->rhs->As<ast::IntLiteralExpression>()->suffix,
ast::IntLiteralExpression::Suffix::kI);
ASSERT_TRUE(a->lhs->Is<ast::PhonyExpression>());
}
TEST_F(WGSLParserTest, AssignmentStmt_Phony_CompoundOpFails) {
auto p = parser("_ += 123i");
auto e = p->variable_updating_statement();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(e.value, nullptr);
EXPECT_EQ(p->error(), "1:3: expected '=' for assignment");
}
TEST_F(WGSLParserTest, AssignmentStmt_Phony_IncrementFails) {
auto p = parser("_ ++");
auto e = p->variable_updating_statement();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(e.value, nullptr);
EXPECT_EQ(p->error(), "1:3: expected '=' for assignment");
}
TEST_F(WGSLParserTest, AssignmentStmt_Phony_EqualIncrementFails) {
auto p = parser("_ = ++");
auto e = p->variable_updating_statement();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(e.value, nullptr);
EXPECT_EQ(
p->error(),
"1:5: prefix increment and decrement operators are reserved for a future WGSL version");
}
struct CompoundData {
std::string str;
core::BinaryOp op;
};
using CompoundOpTest = WGSLParserTestWithParam<CompoundData>;
TEST_P(CompoundOpTest, CompoundOp) {
auto params = GetParam();
auto p = parser("a " + params.str + " 123u");
auto e = p->variable_updating_statement();
EXPECT_TRUE(e.matched);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
ASSERT_NE(e.value, nullptr);
auto* a = e->As<ast::CompoundAssignmentStatement>();
ASSERT_NE(a, nullptr);
ASSERT_NE(a->lhs, nullptr);
ASSERT_NE(a->rhs, nullptr);
EXPECT_EQ(a->op, params.op);
EXPECT_EQ(a->source.range.begin.line, 1u);
EXPECT_EQ(a->source.range.begin.column, 3u);
EXPECT_EQ(a->source.range.end.line, 1u);
EXPECT_EQ(a->source.range.end.column, 3u + params.str.length());
ASSERT_TRUE(a->lhs->Is<ast::IdentifierExpression>());
auto* ident_expr = a->lhs->As<ast::IdentifierExpression>();
EXPECT_EQ(ident_expr->identifier->symbol, p->builder().Symbols().Get("a"));
ASSERT_TRUE(a->rhs->Is<ast::IntLiteralExpression>());
EXPECT_EQ(a->rhs->As<ast::IntLiteralExpression>()->value, 123);
EXPECT_EQ(a->rhs->As<ast::IntLiteralExpression>()->suffix,
ast::IntLiteralExpression::Suffix::kU);
}
INSTANTIATE_TEST_SUITE_P(WGSLParserTest,
CompoundOpTest,
testing::Values(CompoundData{"+=", core::BinaryOp::kAdd},
CompoundData{"-=", core::BinaryOp::kSubtract},
CompoundData{"*=", core::BinaryOp::kMultiply},
CompoundData{"/=", core::BinaryOp::kDivide},
CompoundData{"%=", core::BinaryOp::kModulo},
CompoundData{"&=", core::BinaryOp::kAnd},
CompoundData{"|=", core::BinaryOp::kOr},
CompoundData{"^=", core::BinaryOp::kXor},
CompoundData{">>=", core::BinaryOp::kShiftRight},
CompoundData{"<<=", core::BinaryOp::kShiftLeft}));
TEST_F(WGSLParserTest, AssignmentStmt_MissingEqual) {
auto p = parser("a.b.c[2].d 123");
auto e = p->variable_updating_statement();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(e.value, nullptr);
EXPECT_EQ(p->error(), "1:12: expected '=' for assignment");
}
TEST_F(WGSLParserTest, AssignmentStmt_Compound_MissingEqual) {
auto p = parser("a + 123");
auto e = p->variable_updating_statement();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(e.value, nullptr);
EXPECT_EQ(p->error(), "1:3: expected '=' for assignment");
}
TEST_F(WGSLParserTest, AssignmentStmt_InvalidLHS) {
auto p = parser("if (true) {} = 123");
auto e = p->variable_updating_statement();
EXPECT_FALSE(e.matched);
EXPECT_FALSE(e.errored);
EXPECT_FALSE(p->has_error()) << p->error();
EXPECT_EQ(e.value, nullptr);
}
TEST_F(WGSLParserTest, AssignmentStmt_InvalidRHS) {
auto p = parser("a.b.c[2].d = if (true) {}");
auto e = p->variable_updating_statement();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:14: unable to parse right side of assignment");
}
TEST_F(WGSLParserTest, AssignmentStmt_InvalidCompoundOp) {
auto p = parser("a &&= true");
auto e = p->variable_updating_statement();
EXPECT_FALSE(e.matched);
EXPECT_TRUE(e.errored);
EXPECT_EQ(e.value, nullptr);
EXPECT_TRUE(p->has_error());
EXPECT_EQ(p->error(), "1:3: expected '=' for assignment");
}
} // namespace
} // namespace tint::wgsl::reader