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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/writer/ast_printer/helper_test.h"
#include "gmock/gmock.h"
#include "src/tint/lang/core/fluent_types.h"
using namespace tint::core::number_suffixes; // NOLINT
using namespace tint::core::fluent_types; // NOLINT
namespace tint::wgsl::writer {
namespace {
using WgslASTPrinterTest = TestHelper;
TEST_F(WgslASTPrinterTest, Emit_Loop) {
auto* body = Block(Break());
auto* continuing = Block();
auto* l = Loop(body, continuing);
Func("F", tint::Empty, ty.void_(), Vector{l}, Vector{Stage(ast::PipelineStage::kFragment)});
ASTPrinter& gen = Build();
gen.IncrementIndent();
gen.EmitStatement(l);
EXPECT_THAT(gen.Diagnostics(), testing::IsEmpty());
EXPECT_EQ(gen.Result(), R"( loop {
break;
}
)");
}
TEST_F(WgslASTPrinterTest, Emit_LoopWithContinuing) {
Func("a_statement", {}, ty.void_(), {});
auto* body = Block(Break());
auto* continuing = Block(CallStmt(Call("a_statement")));
auto* l = Loop(body, continuing);
Func("F", tint::Empty, ty.void_(), Vector{l}, Vector{Stage(ast::PipelineStage::kFragment)});
ASTPrinter& gen = Build();
gen.IncrementIndent();
gen.EmitStatement(l);
EXPECT_THAT(gen.Diagnostics(), testing::IsEmpty());
EXPECT_EQ(gen.Result(), R"( loop {
break;
continuing {
a_statement();
}
}
)");
}
TEST_F(WgslASTPrinterTest, Emit_LoopWithContinuing_BreakIf) {
Func("a_statement", {}, ty.void_(), {});
auto* body = Block(Discard());
auto* continuing = Block(CallStmt(Call("a_statement")), BreakIf(true));
auto* l = Loop(body, continuing);
Func("F", tint::Empty, ty.void_(), Vector{l}, Vector{Stage(ast::PipelineStage::kFragment)});
ASTPrinter& gen = Build();
gen.IncrementIndent();
gen.EmitStatement(l);
EXPECT_THAT(gen.Diagnostics(), testing::IsEmpty());
EXPECT_EQ(gen.Result(), R"( loop {
discard;
continuing {
a_statement();
break if true;
}
}
)");
}
TEST_F(WgslASTPrinterTest, Emit_ForLoopWithMultiStmtInit) {
// var<workgroup> a : atomic<i32>;
// for({ignore(1i); ignore(2i);}; ; ) {
// return;
// }
GlobalVar("a", ty.atomic<i32>(), core::AddressSpace::kWorkgroup);
auto* multi_stmt = Block(Ignore(1_i), Ignore(2_i));
auto* f = For(multi_stmt, nullptr, nullptr, Block(Return()));
WrapInFunction(f);
ASTPrinter& gen = Build();
gen.IncrementIndent();
gen.EmitStatement(f);
EXPECT_THAT(gen.Diagnostics(), testing::IsEmpty());
EXPECT_EQ(gen.Result(), R"( for({
_ = 1i;
_ = 2i;
}; ; ) {
return;
}
)");
}
TEST_F(WgslASTPrinterTest, Emit_ForLoopWithSimpleCond) {
// for(; true; ) {
// return;
// }
auto* f = For(nullptr, true, nullptr, Block(Return()));
WrapInFunction(f);
ASTPrinter& gen = Build();
gen.IncrementIndent();
gen.EmitStatement(f);
EXPECT_THAT(gen.Diagnostics(), testing::IsEmpty());
EXPECT_EQ(gen.Result(), R"( for(; true; ) {
return;
}
)");
}
TEST_F(WgslASTPrinterTest, Emit_ForLoopWithSimpleCont) {
// for(; ; i = i + 1i) {
// return;
// }
auto* v = Decl(Var("i", ty.i32()));
auto* f = For(nullptr, nullptr, Assign("i", Add("i", 1_i)), Block(Return()));
WrapInFunction(v, f);
ASTPrinter& gen = Build();
gen.IncrementIndent();
gen.EmitStatement(f);
EXPECT_THAT(gen.Diagnostics(), testing::IsEmpty());
EXPECT_EQ(gen.Result(), R"( for(; ; i = (i + 1i)) {
return;
}
)");
}
TEST_F(WgslASTPrinterTest, Emit_ForLoopWithMultiStmtCont) {
// var<workgroup> a : atomic<i32>;
// for(; ; { ignore(1i); ignore(2i); }) {
// return;
// }
GlobalVar("a", ty.atomic<i32>(), core::AddressSpace::kWorkgroup);
auto* multi_stmt = Block(Ignore(1_i), Ignore(2_i));
auto* f = For(nullptr, nullptr, multi_stmt, Block(Return()));
WrapInFunction(f);
ASTPrinter& gen = Build();
gen.IncrementIndent();
gen.EmitStatement(f);
EXPECT_THAT(gen.Diagnostics(), testing::IsEmpty());
EXPECT_EQ(gen.Result(), R"( for(; ; {
_ = 1i;
_ = 2i;
}) {
return;
}
)");
}
TEST_F(WgslASTPrinterTest, Emit_ForLoopWithSimpleInitCondCont) {
// for(var i : i32; true; i = i + 1i) {
// return;
// }
auto* f = For(Decl(Var("i", ty.i32())), true, Assign("i", Add("i", 1_i)), Block(Return()));
WrapInFunction(f);
ASTPrinter& gen = Build();
gen.IncrementIndent();
gen.EmitStatement(f);
EXPECT_THAT(gen.Diagnostics(), testing::IsEmpty());
EXPECT_EQ(gen.Result(), R"( for(var i : i32; true; i = (i + 1i)) {
return;
}
)");
}
TEST_F(WgslASTPrinterTest, Emit_ForLoopWithMultiStmtInitCondCont) {
// var<workgroup> a : atomic<i32>;
// for({ ignore(1i); ignore(2i); }; true; { ignore(3i); ignore(4i); }) {
// return;
// }
GlobalVar("a", ty.atomic<i32>(), core::AddressSpace::kWorkgroup);
auto* multi_stmt_a = Block(Ignore(1_i), Ignore(2_i));
auto* multi_stmt_b = Block(Ignore(3_i), Ignore(4_i));
auto* f = For(multi_stmt_a, Expr(true), multi_stmt_b, Block(Return()));
WrapInFunction(f);
ASTPrinter& gen = Build();
gen.IncrementIndent();
gen.EmitStatement(f);
EXPECT_THAT(gen.Diagnostics(), testing::IsEmpty());
EXPECT_EQ(gen.Result(), R"( for({
_ = 1i;
_ = 2i;
}; true; {
_ = 3i;
_ = 4i;
}) {
return;
}
)");
}
TEST_F(WgslASTPrinterTest, Emit_While) {
// while(true) {
// return;
// }
auto* f = While(Expr(true), Block(Return()));
WrapInFunction(f);
ASTPrinter& gen = Build();
gen.IncrementIndent();
gen.EmitStatement(f);
EXPECT_THAT(gen.Diagnostics(), testing::IsEmpty());
EXPECT_EQ(gen.Result(), R"( while(true) {
return;
}
)");
}
TEST_F(WgslASTPrinterTest, Emit_While_WithContinue) {
// while(true) {
// continue;
// }
auto* f = While(Expr(true), Block(Continue()));
WrapInFunction(f);
ASTPrinter& gen = Build();
gen.IncrementIndent();
gen.EmitStatement(f);
EXPECT_THAT(gen.Diagnostics(), testing::IsEmpty());
EXPECT_EQ(gen.Result(), R"( while(true) {
continue;
}
)");
}
TEST_F(WgslASTPrinterTest, Emit_WhileMultiCond) {
// while(true && false) {
// return;
// }
auto* multi_stmt =
create<ast::BinaryExpression>(core::BinaryOp::kLogicalAnd, Expr(true), Expr(false));
auto* f = While(multi_stmt, Block(Return()));
WrapInFunction(f);
ASTPrinter& gen = Build();
gen.IncrementIndent();
gen.EmitStatement(f);
EXPECT_THAT(gen.Diagnostics(), testing::IsEmpty());
EXPECT_EQ(gen.Result(), R"( while((true && false)) {
return;
}
)");
}
} // namespace
} // namespace tint::wgsl::writer