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Add some coarse debug information to semantics. (#2382)

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Example stack:

```
1.	node_stack_:
	0.	FunctionDefinitionStart
	1.	ReturnStatement -> node1
2.	node_block_stack_:
	0.	block0
	1.	block1
```

Example trace output:

```
*** SemanticsParseTreeHandler::Build Begin ***
Push 0: FunctionIntroducer
Push 1: DeclaredName
Push 2: ParameterListEnd
Pop 2: ParameterListEnd
Push 2: ParameterList
Pop 2: ParameterList
Pop 0: FunctionIntroducer
AddNode block0: FunctionDeclaration()
AddNode block0: BindName(ident0, node0)
AddNode block0: FunctionDefinition(node0, block1)
Push 0: FunctionDefinitionStart
Push 1: Literal -> IntegerLiteral
AddNode block1: IntegerLiteral(int0): node_xref1
Push 2: StatementEnd
Pop 2: StatementEnd
Pop 1: any (Literal) -> node0
Push 1: ReturnStatement -> ReturnExpression
AddNode block1: ReturnExpression(node0)
Pop 0: FunctionDefinitionStart
Push 0: FunctionDefinition
*** SemanticsParseTreeHandler::Build End ***
cross_reference_irs.size == 2,
cross_references = {
  node_xref0 = "xref(ir0, block0, node0)";
  node_xref1 = "xref(ir0, block0, node1)";
},
identifiers = {
  ident0 = "Foo";
},
integer_literals = {
  int0 = 0;
},
node_blocks = {
  block0 = {
    node0 = FunctionDeclaration();
    node1 = BindName(ident0, node0);
    node2 = FunctionDefinition(node0, block1);
  },
  block1 = {
    node0 = IntegerLiteral(int0): node_xref1;
    node1 = ReturnExpression(node0);
  },
}
```

Co-authored-by: Chandler Carruth <chandlerc@gmail.com>
This commit is contained in:
Jon Ross-Perkins
2022-11-11 14:10:13 -08:00
committed by GitHub
co-authored by Chandler Carruth
parent 25d1b62df0
commit 352fec1885
16 changed files with 275 additions and 27 deletions
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common/vlog_test.cpp
+49
View File
@@ -0,0 +1,49 @@
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#include "common/vlog.h"
#include <gmock/gmock.h>
#include <gtest/gtest.h>
namespace Carbon::Testing {
namespace {
using ::testing::IsEmpty;
using ::testing::StrEq;
// Helper class with a vlog_stream_ member for CARBON_VLOG.
class VLogger {
public:
explicit VLogger(bool enable) : buffer_(buffer_str_) {
if (enable) {
vlog_stream_ = &buffer_;
}
}
void VLog() { CARBON_VLOG() << "Test\n"; }
auto buffer() -> llvm::StringRef { return buffer_str_; }
private:
std::string buffer_str_;
llvm::raw_string_ostream buffer_;
llvm::raw_ostream* vlog_stream_ = nullptr;
};
TEST(VLogTest, Enabled) {
VLogger vlog(/*enable=*/true);
vlog.VLog();
EXPECT_THAT(vlog.buffer(), StrEq("Test\n"));
}
TEST(VLogTest, Disabled) {
VLogger vlog(/*enable=*/false);
vlog.VLog();
EXPECT_THAT(vlog.buffer(), IsEmpty());
}
} // namespace
} // namespace Carbon::Testing