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llvm-project/clang/unittests/ASTMatchers/Dynamic/ParserTest.cpp

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//===- unittest/ASTMatchers/Dynamic/ParserTest.cpp - Parser unit tests -===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===-------------------------------------------------------------------===//
#include "../ASTMatchersTest.h"
#include "clang/ASTMatchers/Dynamic/Parser.h"
#include "clang/ASTMatchers/Dynamic/Registry.h"
#include "llvm/ADT/Optional.h"
#include "gtest/gtest.h"
#include <string>
#include <vector>
namespace clang {
namespace ast_matchers {
namespace dynamic {
namespace {
class MockSema : public Parser::Sema {
public:
~MockSema() override {}
uint64_t expectMatcher(StringRef MatcherName) {
// Optimizations on the matcher framework make simple matchers like
// 'stmt()' to be all the same matcher.
// Use a more complex expression to prevent that.
ast_matchers::internal::Matcher<Stmt> M = stmt(stmt(), stmt());
ExpectedMatchers.insert(std::make_pair(MatcherName, M));
return M.getID().second;
}
void parse(StringRef Code) {
Diagnostics Error;
VariantValue Value;
Parser::parseExpression(Code, this, &Value, &Error);
Values.push_back(Value);
Errors.push_back(Error.toStringFull());
}
llvm::Optional<MatcherCtor>
lookupMatcherCtor(StringRef MatcherName) override {
const ExpectedMatchersTy::value_type *Matcher =
&*ExpectedMatchers.find(MatcherName);
return reinterpret_cast<MatcherCtor>(Matcher);
}
VariantMatcher actOnMatcherExpression(MatcherCtor Ctor,
SourceRange NameRange,
StringRef BindID,
ArrayRef<ParserValue> Args,
Diagnostics *Error) override {
const ExpectedMatchersTy::value_type *Matcher =
reinterpret_cast<const ExpectedMatchersTy::value_type *>(Ctor);
MatcherInfo ToStore = { Matcher->first, NameRange, Args, BindID };
Matchers.push_back(ToStore);
return VariantMatcher::SingleMatcher(Matcher->second);
}
struct MatcherInfo {
StringRef MatcherName;
SourceRange NameRange;
std::vector<ParserValue> Args;
std::string BoundID;
};
std::vector<std::string> Errors;
std::vector<VariantValue> Values;
std::vector<MatcherInfo> Matchers;
typedef std::map<std::string, ast_matchers::internal::Matcher<Stmt> >
ExpectedMatchersTy;
ExpectedMatchersTy ExpectedMatchers;
};
TEST(ParserTest, ParseUnsigned) {
MockSema Sema;
Sema.parse("0");
Sema.parse("123");
Sema.parse("0x1f");
Sema.parse("12345678901");
Sema.parse("1a1");
EXPECT_EQ(5U, Sema.Values.size());
EXPECT_EQ(0U, Sema.Values[0].getUnsigned());
EXPECT_EQ(123U, Sema.Values[1].getUnsigned());
EXPECT_EQ(31U, Sema.Values[2].getUnsigned());
EXPECT_EQ("1:1: Error parsing unsigned token: <12345678901>", Sema.Errors[3]);
EXPECT_EQ("1:1: Error parsing unsigned token: <1a1>", Sema.Errors[4]);
}
TEST(ParserTest, ParseString) {
MockSema Sema;
Sema.parse("\"Foo\"");
Sema.parse("\"\"");
Sema.parse("\"Baz");
EXPECT_EQ(3ULL, Sema.Values.size());
EXPECT_EQ("Foo", Sema.Values[0].getString());
EXPECT_EQ("", Sema.Values[1].getString());
EXPECT_EQ("1:1: Error parsing string token: <\"Baz>", Sema.Errors[2]);
}
bool matchesRange(SourceRange Range, unsigned StartLine,
unsigned EndLine, unsigned StartColumn, unsigned EndColumn) {
EXPECT_EQ(StartLine, Range.Start.Line);
EXPECT_EQ(EndLine, Range.End.Line);
EXPECT_EQ(StartColumn, Range.Start.Column);
EXPECT_EQ(EndColumn, Range.End.Column);
return Range.Start.Line == StartLine && Range.End.Line == EndLine &&
Range.Start.Column == StartColumn && Range.End.Column == EndColumn;
}
llvm::Optional<DynTypedMatcher> getSingleMatcher(const VariantValue &Value) {
llvm::Optional<DynTypedMatcher> Result =
Value.getMatcher().getSingleMatcher();
EXPECT_TRUE(Result.hasValue());
return Result;
}
TEST(ParserTest, ParseMatcher) {
MockSema Sema;
const uint64_t ExpectedFoo = Sema.expectMatcher("Foo");
const uint64_t ExpectedBar = Sema.expectMatcher("Bar");
const uint64_t ExpectedBaz = Sema.expectMatcher("Baz");
Sema.parse(" Foo ( Bar ( 17), Baz( \n \"B A,Z\") ) .bind( \"Yo!\") ");
for (size_t i = 0, e = Sema.Errors.size(); i != e; ++i) {
EXPECT_EQ("", Sema.Errors[i]);
}
EXPECT_NE(ExpectedFoo, ExpectedBar);
EXPECT_NE(ExpectedFoo, ExpectedBaz);
EXPECT_NE(ExpectedBar, ExpectedBaz);
EXPECT_EQ(1ULL, Sema.Values.size());
EXPECT_EQ(ExpectedFoo, getSingleMatcher(Sema.Values[0])->getID().second);
EXPECT_EQ(3ULL, Sema.Matchers.size());
const MockSema::MatcherInfo Bar = Sema.Matchers[0];
EXPECT_EQ("Bar", Bar.MatcherName);
EXPECT_TRUE(matchesRange(Bar.NameRange, 1, 1, 8, 17));
EXPECT_EQ(1ULL, Bar.Args.size());
EXPECT_EQ(17U, Bar.Args[0].Value.getUnsigned());
const MockSema::MatcherInfo Baz = Sema.Matchers[1];
EXPECT_EQ("Baz", Baz.MatcherName);
EXPECT_TRUE(matchesRange(Baz.NameRange, 1, 2, 19, 10));
EXPECT_EQ(1ULL, Baz.Args.size());
EXPECT_EQ("B A,Z", Baz.Args[0].Value.getString());
const MockSema::MatcherInfo Foo = Sema.Matchers[2];
EXPECT_EQ("Foo", Foo.MatcherName);
EXPECT_TRUE(matchesRange(Foo.NameRange, 1, 2, 2, 12));
EXPECT_EQ(2ULL, Foo.Args.size());
EXPECT_EQ(ExpectedBar, getSingleMatcher(Foo.Args[0].Value)->getID().second);
EXPECT_EQ(ExpectedBaz, getSingleMatcher(Foo.Args[1].Value)->getID().second);
EXPECT_EQ("Yo!", Foo.BoundID);
}
using ast_matchers::internal::Matcher;
Parser::NamedValueMap getTestNamedValues() {
Parser::NamedValueMap Values;
Values["nameX"] = llvm::StringRef("x");
Values["hasParamA"] =
VariantMatcher::SingleMatcher(hasParameter(0, hasName("a")));
return Values;
}
TEST(ParserTest, FullParserTest) {
Diagnostics Error;
llvm::Optional<DynTypedMatcher> VarDecl(Parser::parseMatcherExpression(
"varDecl(hasInitializer(binaryOperator(hasLHS(integerLiteral()),"
" hasOperatorName(\"+\"))))",
&Error));
EXPECT_EQ("", Error.toStringFull());
Matcher<Decl> M = VarDecl->unconditionalConvertTo<Decl>();
EXPECT_TRUE(matches("int x = 1 + false;", M));
EXPECT_FALSE(matches("int x = true + 1;", M));
EXPECT_FALSE(matches("int x = 1 - false;", M));
EXPECT_FALSE(matches("int x = true - 1;", M));
llvm::Optional<DynTypedMatcher> HasParameter(Parser::parseMatcherExpression(
"functionDecl(hasParameter(1, hasName(\"x\")))", &Error));
EXPECT_EQ("", Error.toStringFull());
M = HasParameter->unconditionalConvertTo<Decl>();
EXPECT_TRUE(matches("void f(int a, int x);", M));
EXPECT_FALSE(matches("void f(int x, int a);", M));
// Test named values.
auto NamedValues = getTestNamedValues();
llvm::Optional<DynTypedMatcher> HasParameterWithNamedValues(
Parser::parseMatcherExpression(
"functionDecl(hasParamA, hasParameter(1, hasName(nameX)))",
nullptr, &NamedValues, &Error));
EXPECT_EQ("", Error.toStringFull());
M = HasParameterWithNamedValues->unconditionalConvertTo<Decl>();
EXPECT_TRUE(matches("void f(int a, int x);", M));
EXPECT_FALSE(matches("void f(int x, int a);", M));
EXPECT_TRUE(!Parser::parseMatcherExpression(
"hasInitializer(\n binaryOperator(hasLHS(\"A\")))",
&Error).hasValue());
EXPECT_EQ("1:1: Error parsing argument 1 for matcher hasInitializer.\n"
"2:5: Error parsing argument 1 for matcher binaryOperator.\n"
"2:20: Error building matcher hasLHS.\n"
"2:27: Incorrect type for arg 1. "
"(Expected = Matcher<Expr>) != (Actual = String)",
Error.toStringFull());
}
std::string ParseWithError(StringRef Code) {
Diagnostics Error;
VariantValue Value;
Parser::parseExpression(Code, &Value, &Error);
return Error.toStringFull();
}
std::string ParseMatcherWithError(StringRef Code) {
Diagnostics Error;
Parser::parseMatcherExpression(Code, &Error);
return Error.toStringFull();
}
TEST(ParserTest, Errors) {
EXPECT_EQ(
"1:5: Error parsing matcher. Found token <123> while looking for '('.",
ParseWithError("Foo 123"));
EXPECT_EQ(
"1:1: Matcher not found: Foo\n"
"1:9: Error parsing matcher. Found token <123> while looking for ','.",
ParseWithError("Foo(\"A\" 123)"));
EXPECT_EQ(
"1:1: Error parsing argument 1 for matcher stmt.\n"
"1:6: Value not found: someValue",
ParseWithError("stmt(someValue)"));
EXPECT_EQ(
"1:1: Matcher not found: Foo\n"
"1:4: Error parsing matcher. Found end-of-code while looking for ')'.",
ParseWithError("Foo("));
EXPECT_EQ("1:1: End of code found while looking for token.",
ParseWithError(""));
EXPECT_EQ("Input value is not a matcher expression.",
ParseMatcherWithError("\"A\""));
EXPECT_EQ("1:1: Matcher not found: Foo\n"
"1:1: Error parsing argument 1 for matcher Foo.\n"
"1:5: Invalid token <(> found when looking for a value.",
ParseWithError("Foo(("));
EXPECT_EQ("1:7: Expected end of code.", ParseWithError("expr()a"));
EXPECT_EQ("1:11: Malformed bind() expression.",
ParseWithError("isArrow().biind"));
EXPECT_EQ("1:15: Malformed bind() expression.",
ParseWithError("isArrow().bind"));
EXPECT_EQ("1:16: Malformed bind() expression.",
ParseWithError("isArrow().bind(foo"));
EXPECT_EQ("1:21: Malformed bind() expression.",
ParseWithError("isArrow().bind(\"foo\""));
EXPECT_EQ("1:1: Error building matcher isArrow.\n"
"1:1: Matcher does not support binding.",
ParseWithError("isArrow().bind(\"foo\")"));
EXPECT_EQ("Input value has unresolved overloaded type: "
"Matcher<DoStmt|ForStmt|WhileStmt|CXXForRangeStmt|FunctionDecl>",
ParseMatcherWithError("hasBody(stmt())"));
}
TEST(ParserTest, OverloadErrors) {
EXPECT_EQ("1:1: Error building matcher callee.\n"
"1:8: Candidate 1: Incorrect type for arg 1. "
"(Expected = Matcher<Stmt>) != (Actual = String)\n"
"1:8: Candidate 2: Incorrect type for arg 1. "
"(Expected = Matcher<Decl>) != (Actual = String)",
ParseWithError("callee(\"A\")"));
}
TEST(ParserTest, CompletionRegistry) {
std::vector<MatcherCompletion> Comps =
Parser::completeExpression("while", 5);
ASSERT_EQ(1u, Comps.size());
EXPECT_EQ("Stmt(", Comps[0].TypedText);
EXPECT_EQ("Matcher<Stmt> whileStmt(Matcher<WhileStmt>...)",
Comps[0].MatcherDecl);
Comps = Parser::completeExpression("whileStmt().", 12);
ASSERT_EQ(1u, Comps.size());
EXPECT_EQ("bind(\"", Comps[0].TypedText);
EXPECT_EQ("bind", Comps[0].MatcherDecl);
}
TEST(ParserTest, CompletionNamedValues) {
// Can complete non-matcher types.
auto NamedValues = getTestNamedValues();
StringRef Code = "functionDecl(hasName(";
std::vector<MatcherCompletion> Comps =
Parser::completeExpression(Code, Code.size(), nullptr, &NamedValues);
ASSERT_EQ(1u, Comps.size());
EXPECT_EQ("nameX", Comps[0].TypedText);
EXPECT_EQ("String nameX", Comps[0].MatcherDecl);
// Can complete if there are names in the expression.
Code = "cxxMethodDecl(hasName(nameX), ";
Comps = Parser::completeExpression(Code, Code.size(), nullptr, &NamedValues);
EXPECT_LT(0u, Comps.size());
// Can complete names and registry together.
Code = "cxxMethodDecl(hasP";
Comps = Parser::completeExpression(Code, Code.size(), nullptr, &NamedValues);
ASSERT_EQ(3u, Comps.size());
EXPECT_EQ("aramA", Comps[0].TypedText);
EXPECT_EQ("Matcher<FunctionDecl> hasParamA", Comps[0].MatcherDecl);
EXPECT_EQ("arameter(", Comps[1].TypedText);
EXPECT_EQ(
"Matcher<FunctionDecl> hasParameter(unsigned, Matcher<ParmVarDecl>)",
Comps[1].MatcherDecl);
EXPECT_EQ("arent(", Comps[2].TypedText);
EXPECT_EQ(
"Matcher<Decl> "
"hasParent(Matcher<NestedNameSpecifierLoc|TypeLoc|Decl|...>)",
Comps[2].MatcherDecl);
}
} // end anonymous namespace
} // end namespace dynamic
} // end namespace ast_matchers
} // end namespace clang
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