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//===--- TokenTest.cpp ----------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "clang-pseudo/Token.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/TokenKinds.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
namespace clang {
namespace pseudo {
namespace {
using testing::AllOf;
using testing::ElementsAre;
using testing::ElementsAreArray;
using testing::Not;
MATCHER_P2(token, Text, Kind, "") {
return arg.Kind == Kind && arg.text() == Text;
}
MATCHER_P(hasFlag, Flag, "") { return arg.flag(Flag); }
MATCHER_P2(lineIndent, Line, Indent, "") {
return arg.Line == (unsigned)Line && arg.Indent == (unsigned)Indent;
}
MATCHER_P(originalIndex, index, "") {
return arg.OriginalIndex == (Token::Index)index;
}
TEST(TokenTest, Lex) {
LangOptions Opts;
std::string Code = R"cpp(
#include <stdio.h>
int main() {
return 42; // the answer
}
)cpp";
TokenStream Raw = lex(Code, Opts);
ASSERT_TRUE(Raw.isFinalized());
EXPECT_THAT(Raw.tokens(),
ElementsAreArray({
// Lexing of directives is weird, especially <angled> strings.
token("#", tok::hash),
token("include", tok::raw_identifier),
token("<", tok::less),
token("stdio", tok::raw_identifier),
token(".", tok::period),
token("h", tok::raw_identifier),
token(">", tok::greater),
token("int", tok::raw_identifier),
token("main", tok::raw_identifier),
token("(", tok::l_paren),
token(")", tok::r_paren),
token("{", tok::l_brace),
token("return", tok::raw_identifier),
token("42", tok::numeric_constant),
token(";", tok::semi),
token("// the answer", tok::comment),
token("}", tok::r_brace),
}));
TokenStream Cooked = cook(Raw, Opts);
ASSERT_TRUE(Cooked.isFinalized());
EXPECT_THAT(Cooked.tokens(),
ElementsAreArray({
// Cooked identifier types in directives are not meaningful.
token("#", tok::hash),
token("include", tok::identifier),
token("<", tok::less),
token("stdio", tok::identifier),
token(".", tok::period),
token("h", tok::identifier),
token(">", tok::greater),
token("int", tok::kw_int),
token("main", tok::identifier),
token("(", tok::l_paren),
token(")", tok::r_paren),
token("{", tok::l_brace),
token("return", tok::kw_return),
token("42", tok::numeric_constant),
token(";", tok::semi),
token("// the answer", tok::comment),
token("}", tok::r_brace),
}));
// Check raw tokens point back into original source code.
EXPECT_EQ(Raw.tokens().front().text().begin(), &Code[Code.find('#')]);
}
TEST(TokenTest, LineContinuation) {
LangOptions Opts;
std::string Code = R"cpp(
one_\
token
two \
tokens
)cpp";
TokenStream Raw = lex(Code, Opts);
EXPECT_THAT(
Raw.tokens(),
ElementsAre(AllOf(token("one_\\\ntoken", tok::raw_identifier),
hasFlag(LexFlags::StartsPPLine),
hasFlag(LexFlags::NeedsCleaning), lineIndent(1, 0),
originalIndex(0)),
AllOf(token("two", tok::raw_identifier),
hasFlag(LexFlags::StartsPPLine),
Not(hasFlag(LexFlags::NeedsCleaning)),
originalIndex(1)),
AllOf(token("\\\ntokens", tok::raw_identifier),
Not(hasFlag(LexFlags::StartsPPLine)),
hasFlag(LexFlags::NeedsCleaning), originalIndex(2))));
TokenStream Cooked = cook(Raw, Opts);
EXPECT_THAT(
Cooked.tokens(),
ElementsAre(AllOf(token("one_token", tok::identifier), lineIndent(1, 0),
originalIndex(0)),
AllOf(token("two", tok::identifier), originalIndex(1)),
AllOf(token("tokens", tok::identifier), originalIndex(2))));
}
TEST(TokenTest, EncodedCharacters) {
LangOptions Opts;
Opts.Trigraphs = true;
Opts.Digraphs = true;
Opts.C99 = true; // UCNs
Opts.CXXOperatorNames = true;
std::string Code = R"(and <: ??! '??=' \u00E9)";
TokenStream Raw = lex(Code, Opts);
EXPECT_THAT(
Raw.tokens(),
ElementsAre( // and is not recognized as && until cook().
AllOf(token("and", tok::raw_identifier),
Not(hasFlag(LexFlags::NeedsCleaning))),
// Digraphs are just different spellings of tokens.
AllOf(token("<:", tok::l_square),
Not(hasFlag(LexFlags::NeedsCleaning))),
// Trigraps are interpreted, still need text cleaning.
AllOf(token(R"(??!)", tok::pipe), hasFlag(LexFlags::NeedsCleaning)),
// Trigraphs must be substituted inside constants too.
AllOf(token(R"('??=')", tok::char_constant),
hasFlag(LexFlags::NeedsCleaning)),
// UCNs need substitution.
AllOf(token(R"(\u00E9)", tok::raw_identifier),
hasFlag(LexFlags::NeedsCleaning))));
TokenStream Cooked = cook(Raw, Opts);
EXPECT_THAT(
Cooked.tokens(),
ElementsAre(token("and", tok::ampamp), // alternate spelling recognized
token("<:", tok::l_square),
token("|", tok::pipe), // trigraph substituted
token("'#'", tok::char_constant), // trigraph substituted
token("é", tok::identifier))); // UCN substituted
}
TEST(TokenTest, Indentation) {
LangOptions Opts;
std::string Code = R"cpp( hello world
no_indent \
line_was_continued
)cpp";
TokenStream Raw = lex(Code, Opts);
EXPECT_THAT(Raw.tokens(), ElementsAreArray({
lineIndent(0, 3), // hello
lineIndent(0, 3), // world
lineIndent(1, 0), // no_indent
lineIndent(2, 2), // line_was_continued
}));
}
TEST(TokenTest, SplitGreaterGreater) {
LangOptions Opts;
std::string Code = R"cpp(
>> // split
// >> with an escaped newline in the middle, split
>\
>
>>= // not split
)cpp";
TokenStream Cook = cook(lex(Code, Opts), Opts);
TokenStream Split = stripComments(Cook);
EXPECT_THAT(Split.tokens(),
ElementsAre(AllOf(token(">", tok::greater), originalIndex(0)),
AllOf(token(">", tok::greater), originalIndex(0)),
// Token 1 and 2 are comments.
AllOf(token(">", tok::greater), originalIndex(3)),
AllOf(token(">", tok::greater), originalIndex(3)),
AllOf(token(">>=", tok::greatergreaterequal),
originalIndex(4))));
}
TEST(TokenTest, DropComments) {
LangOptions Opts;
std::string Code = R"cpp(
// comment
int /*abc*/;
)cpp";
TokenStream Raw = cook(lex(Code, Opts), Opts);
TokenStream Stripped = stripComments(Raw);
EXPECT_THAT(
Raw.tokens(),
ElementsAre(AllOf(token("// comment", tok::comment), originalIndex(0)),
AllOf(token("int", tok::kw_int), originalIndex(1)),
AllOf(token("/*abc*/", tok::comment), originalIndex(2)),
AllOf(token(";", tok::semi), originalIndex(3))));
EXPECT_THAT(Stripped.tokens(),
ElementsAre(AllOf(token("int", tok::kw_int), originalIndex(1)),
AllOf(token(";", tok::semi), originalIndex(3))));
}
} // namespace
} // namespace pseudo
} // namespace clang
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