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llvm-project/lldb/unittests/Expression/GoParserTest.cpp
Zachary Turner bf9a77305f Move classes from Core -> Utility. 
This moves the following classes from Core -> Utility.

ConstString
Error
RegularExpression
Stream
StreamString

The goal here is to get lldbUtility into a state where it has
no dependendencies except on itself and LLVM, so it can be the
starting point at which to start untangling LLDB's dependencies.
These are all low level and very widely used classes, and
previously lldbUtility had dependencies up to lldbCore in order
to use these classes.  So moving then down to lldbUtility makes
sense from both the short term and long term perspective in
solving this problem.

Differential Revision: https://reviews.llvm.org/D29427

llvm-svn: 293941
2017-02-02 21:39:50 +00:00

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//===-- GoParserTest.cpp ------------------------------------------*- C++
//-*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#if defined(_MSC_VER) && (_HAS_EXCEPTIONS == 0)
// Workaround for MSVC standard library bug, which fails to include <thread>
// when
// exceptions are disabled.
#include <eh.h>
#endif
#include <sstream>
#include "gtest/gtest.h"
#include "Plugins/ExpressionParser/Go/GoParser.h"
#include "lldb/Utility/Error.h"
using namespace lldb_private;
namespace {
struct ASTPrinter {
ASTPrinter(GoASTNode *n) { (*this)(n); }
void operator()(GoASTNode *n) {
if (n == nullptr) {
m_stream << "nil ";
return;
}
m_stream << "(" << n->GetKindName() << " ";
n->WalkChildren(*this);
if (auto *nn = llvm::dyn_cast<GoASTAssignStmt>(n))
m_stream << nn->GetDefine() << " ";
if (auto *nn = llvm::dyn_cast<GoASTBasicLit>(n))
m_stream << nn->GetValue().m_value.str() << " ";
if (auto *nn = llvm::dyn_cast<GoASTBinaryExpr>(n))
m_stream << GoLexer::LookupToken(nn->GetOp()).str() << " ";
if (auto *nn = llvm::dyn_cast<GoASTIdent>(n))
m_stream << nn->GetName().m_value.str() << " ";
if (auto *nn = llvm::dyn_cast<GoASTBranchStmt>(n))
m_stream << GoLexer::LookupToken(nn->GetTok()).str() << " ";
if (auto *nn = llvm::dyn_cast<GoASTCallExpr>(n))
m_stream << (nn->GetEllipsis() ? "..." : "") << " ";
if (auto *nn = llvm::dyn_cast<GoASTChanType>(n))
m_stream << nn->GetDir() << " ";
if (auto *nn = llvm::dyn_cast<GoASTGenDecl>(n))
m_stream << GoLexer::LookupToken(nn->GetTok()).str() << " ";
if (auto *nn = llvm::dyn_cast<GoASTIncDecStmt>(n))
m_stream << GoLexer::LookupToken(nn->GetTok()).str() << " ";
if (auto *nn = llvm::dyn_cast<GoASTRangeStmt>(n))
m_stream << nn->GetDefine() << " ";
if (auto *nn = llvm::dyn_cast<GoASTSliceExpr>(n))
m_stream << nn->GetSlice3() << " ";
if (auto *nn = llvm::dyn_cast<GoASTUnaryExpr>(n))
m_stream << GoLexer::LookupToken(nn->GetOp()).str() << " ";
m_stream << ") ";
}
const std::string str() const { return m_stream.str(); }
std::stringstream m_stream;
};
testing::AssertionResult CheckStatement(const char *_s, const char *c_expr,
const char *sexpr, const char *code) {
GoParser parser(code);
std::unique_ptr<GoASTStmt> stmt(parser.Statement());
if (parser.Failed() || !stmt) {
Error err;
parser.GetError(err);
return testing::AssertionFailure() << "Error parsing " << c_expr << "\n\t"
<< err.AsCString();
}
std::string actual_sexpr = ASTPrinter(stmt.get()).str();
if (actual_sexpr == sexpr)
return testing::AssertionSuccess();
return testing::AssertionFailure() << "Parsing: " << c_expr
<< "\nExpected: " << sexpr
<< "\nGot: " << actual_sexpr;
}
} // namespace
#define EXPECT_PARSE(s, c) EXPECT_PRED_FORMAT2(CheckStatement, s, c)
TEST(GoParserTest, ParseBasicLiterals) {
EXPECT_PARSE("(ExprStmt (BasicLit 0 ) ) ", "0");
EXPECT_PARSE("(ExprStmt (BasicLit 42 ) ) ", "42");
EXPECT_PARSE("(ExprStmt (BasicLit 0600 ) ) ", "0600");
EXPECT_PARSE("(ExprStmt (BasicLit 0xBadFace ) ) ", "0xBadFace");
EXPECT_PARSE(
"(ExprStmt (BasicLit 170141183460469231731687303715884105727 ) ) ",
"170141183460469231731687303715884105727");
EXPECT_PARSE("(ExprStmt (BasicLit 0. ) ) ", "0.");
EXPECT_PARSE("(ExprStmt (BasicLit 72.40 ) ) ", "72.40");
EXPECT_PARSE("(ExprStmt (BasicLit 072.40 ) ) ", "072.40");
EXPECT_PARSE("(ExprStmt (BasicLit 2.71828 ) ) ", "2.71828");
EXPECT_PARSE("(ExprStmt (BasicLit 1.e+0 ) ) ", "1.e+0");
EXPECT_PARSE("(ExprStmt (BasicLit 6.67428e-11 ) ) ", "6.67428e-11");
EXPECT_PARSE("(ExprStmt (BasicLit 1E6 ) ) ", "1E6");
EXPECT_PARSE("(ExprStmt (BasicLit .12345E+6 ) ) ", ".12345E+6");
EXPECT_PARSE("(ExprStmt (BasicLit 0i ) ) ", "0i");
EXPECT_PARSE("(ExprStmt (BasicLit 011i ) ) ", "011i");
EXPECT_PARSE("(ExprStmt (BasicLit 0.i ) ) ", "0.i");
EXPECT_PARSE("(ExprStmt (BasicLit 2.71828i ) ) ", "2.71828i");
EXPECT_PARSE("(ExprStmt (BasicLit 6.67428e-11i ) ) ", "6.67428e-11i");
EXPECT_PARSE("(ExprStmt (BasicLit 1E6i ) ) ", "1E6i");
EXPECT_PARSE("(ExprStmt (BasicLit .12345E+6i ) ) ", ".12345E+6i");
EXPECT_PARSE("(ExprStmt (BasicLit 'a' ) ) ", "'a'");
EXPECT_PARSE("(ExprStmt (BasicLit '本' ) ) ", "'本'");
EXPECT_PARSE("(ExprStmt (BasicLit \"abc\" ) ) ", "\"abc\"");
EXPECT_PARSE("(ExprStmt (BasicLit `abc` ) ) ", "`abc`");
EXPECT_PARSE("(ExprStmt (BasicLit `ab\nc` ) ) ", "`ab\nc`");
}
TEST(GoParserTest, ParseOperand) {
EXPECT_PARSE("(ExprStmt (Ident a ) ) ", "a");
EXPECT_PARSE("(ExprStmt (Ident _x9 ) ) ", "_x9");
EXPECT_PARSE("(ExprStmt (Ident ThisVariableIsExported ) ) ",
"ThisVariableIsExported");
EXPECT_PARSE("(ExprStmt (Ident αβ ) ) ", "αβ");
EXPECT_PARSE("(ExprStmt (SelectorExpr (Ident math ) (Ident Sin ) ) ) ",
"math.Sin");
}
TEST(GoParserTest, ParseCompositeLiterals) {
EXPECT_PARSE("(ExprStmt (CompositeLit (Ident Point3D ) ) ) ", "Point3D{}");
EXPECT_PARSE("(ExprStmt (CompositeLit (Ident Line ) (Ident origin ) "
"(CompositeLit (Ident Point3D ) (KeyValueExpr "
"(Ident y ) (UnaryExpr (BasicLit 4 ) - ) ) (KeyValueExpr (Ident "
"z ) (BasicLit 12.3 ) ) ) ) ) ",
"Line{origin, Point3D{y: -4, z: 12.3}}");
EXPECT_PARSE("(ExprStmt (CompositeLit (ArrayType (BasicLit 10 ) (Ident "
"string ) ) ) ) ",
"[10]string{}");
EXPECT_PARSE("(ExprStmt (CompositeLit (ArrayType (BasicLit 6 ) (Ident int ) "
") (BasicLit 1 ) (BasicLit 2 ) "
"(BasicLit 3 ) (BasicLit 5 ) ) ) ",
"[6]int {1, 2, 3, 5}");
EXPECT_PARSE("(ExprStmt (CompositeLit (ArrayType nil (Ident int ) ) "
"(BasicLit 2 ) (BasicLit 3 ) (BasicLit 5 ) "
"(BasicLit 7 ) (BasicLit 9 ) (BasicLit 2147483647 ) ) ) ",
"[]int{2, 3, 5, 7, 9, 2147483647}");
EXPECT_PARSE("(ExprStmt (CompositeLit (ArrayType (BasicLit 128 ) (Ident bool "
") ) (KeyValueExpr (BasicLit 'a' ) "
"(Ident true ) ) (KeyValueExpr (BasicLit 'e' ) (Ident true ) ) "
"(KeyValueExpr (BasicLit 'i' ) (Ident "
"true ) ) (KeyValueExpr (BasicLit 'o' ) (Ident true ) ) "
"(KeyValueExpr (BasicLit 'u' ) (Ident true ) ) "
"(KeyValueExpr (BasicLit 'y' ) (Ident true ) ) ) ) ",
"[128]bool{'a': true, 'e': true, 'i': true, 'o': true, 'u': "
"true, 'y': true}");
EXPECT_PARSE(
"(ExprStmt (CompositeLit (ArrayType (BasicLit 10 ) (Ident float32 ) ) "
"(UnaryExpr (BasicLit 1 ) - ) "
"(KeyValueExpr (BasicLit 4 ) (UnaryExpr (BasicLit 0.1 ) - ) ) (UnaryExpr "
"(BasicLit 0.1 ) - ) "
"(KeyValueExpr (BasicLit 9 ) (UnaryExpr (BasicLit 1 ) - ) ) ) ) ",
"[10]float32{-1, 4: -0.1, -0.1, 9: -1}");
}
TEST(GoParserTest, ParseEllipsisArray) {
EXPECT_PARSE("(ExprStmt (CompositeLit (ArrayType (Ellipsis nil ) (Ident "
"string ) ) (BasicLit `Sat` ) (BasicLit `Sun` ) ) ) ",
"[...]string {`Sat`, `Sun`}");
EXPECT_PARSE("(ExprStmt (CompositeLit (ArrayType (Ellipsis nil ) (Ident "
"Point ) ) (CompositeLit nil (BasicLit 1.5 "
") (UnaryExpr (BasicLit 3.5 ) - ) ) (CompositeLit nil (BasicLit "
"0 ) (BasicLit 0 ) ) ) ) ",
"[...]Point{{1.5, -3.5}, {0, 0}}");
}
TEST(GoParserTest, ParseMap) {
EXPECT_PARSE("(ExprStmt (CompositeLit (MapType (Ident string ) (Ident "
"float32 ) ) (KeyValueExpr (BasicLit `C0` ) "
"(BasicLit 16.35 ) ) (KeyValueExpr (BasicLit `D0` ) (BasicLit "
"18.35 ) ) ) ) ",
"map[string]float32{`C0`: 16.35, `D0`: 18.35, }");
}
TEST(GoParserTest, UnaryExpr) {
EXPECT_PARSE("(ExprStmt (UnaryExpr (Ident x ) + ) ) ", "+x");
EXPECT_PARSE("(ExprStmt (UnaryExpr (Ident x ) - ) ) ", "-x");
EXPECT_PARSE("(ExprStmt (UnaryExpr (Ident x ) ! ) ) ", "!x");
EXPECT_PARSE("(ExprStmt (UnaryExpr (Ident x ) ^ ) ) ", "^x");
EXPECT_PARSE("(ExprStmt (UnaryExpr (Ident x ) & ) ) ", "&x");
EXPECT_PARSE("(ExprStmt (UnaryExpr (Ident x ) <- ) ) ", "<-x");
EXPECT_PARSE("(ExprStmt (StarExpr (Ident x ) ) ) ", "*x");
}
TEST(GoParserTest, BinaryExpr) {
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) || ) ) ", "a || b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) && ) ) ", "a && b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) == ) ) ", "a == b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) != ) ) ", "a != b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) < ) ) ", "a < b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) <= ) ) ", "a <= b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) > ) ) ", "a > b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) >= ) ) ", "a >= b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) + ) ) ", "a + b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) - ) ) ", "a - b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) | ) ) ", "a | b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) ^ ) ) ", "a ^ b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) * ) ) ", "a * b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) / ) ) ", "a / b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) % ) ) ", "a % b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) << ) ) ", "a << b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) >> ) ) ", "a >> b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) & ) ) ", "a & b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (Ident b ) &^ ) ) ", "a &^ b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (BasicLit 23 ) (BinaryExpr (BasicLit 3 ) "
"(IndexExpr (Ident x ) (Ident i ) ) * ) + ) ) ",
"23 + 3*x[i]");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident a ) (UnaryExpr (UnaryExpr (Ident "
"a ) + ) + ) + ) ) ",
"a + + + a");
EXPECT_PARSE(
"(ExprStmt (BinaryExpr (UnaryExpr (Ident a ) ^ ) (Ident b ) >> ) ) ",
"^a >> b");
EXPECT_PARSE("(ExprStmt (BinaryExpr (CallExpr (Ident f ) ) (CallExpr (Ident "
"g ) ) || ) ) ",
"f() || g()");
EXPECT_PARSE(
"(ExprStmt (BinaryExpr (BinaryExpr (Ident x ) (BinaryExpr (Ident y ) "
"(BasicLit 1 ) + ) == ) "
"(BinaryExpr (UnaryExpr (Ident chanPtr ) <- ) (BasicLit 0 ) > ) && ) ) ",
"x == y+1 && <-chanPtr > 0");
}
TEST(GoParserTest, PrimaryExpr) {
EXPECT_PARSE(
"(ExprStmt (BinaryExpr (Ident x ) (CallExpr (Ident f ) ) <= ) ) ",
"x <= f()");
EXPECT_PARSE("(ExprStmt (BinaryExpr (Ident s ) (BasicLit `.txt` ) + ) ) ",
"(s + `.txt`)");
EXPECT_PARSE(
"(ExprStmt (CallExpr (Ident f ) (BasicLit 3.1415 ) (Ident true ) ) ) ",
"f(3.1415, true)");
EXPECT_PARSE(
"(ExprStmt (CallExpr (Ident f ) (BasicLit 3.1415 ) (Ident a ) ... ) ) ",
"f(3.1415, a...)");
EXPECT_PARSE("(ExprStmt (IndexExpr (Ident m ) (BasicLit '1' ) ) ) ",
"m['1']");
EXPECT_PARSE("(ExprStmt (SliceExpr (Ident s ) (Ident i ) (BinaryExpr (Ident "
"j ) (BasicLit 1 ) + ) nil 0 ) ) ",
"s[i : j + 1]");
EXPECT_PARSE("(ExprStmt (SelectorExpr (Ident obj ) (Ident color ) ) ) ",
"obj.color");
EXPECT_PARSE("(ExprStmt (CallExpr (SelectorExpr (IndexExpr (SelectorExpr "
"(Ident f ) (Ident p ) ) (Ident i ) ) "
"(Ident x ) ) ) ) ",
"f.p[i].x()");
}
TEST(GoParserTest, Conversions) {
EXPECT_PARSE(
"(ExprStmt (StarExpr (CallExpr (Ident Point ) (Ident p ) ) ) ) ",
"*Point(p)");
EXPECT_PARSE(
"(ExprStmt (CallExpr (StarExpr (Ident Point ) ) (Ident p ) ) ) ",
"(*Point)(p)");
EXPECT_PARSE("(ExprStmt (UnaryExpr (CallExpr (ChanType (Ident int ) 0 ) "
"(Ident c ) ) <- ) ) ",
"<-chan int(c)");
EXPECT_PARSE("(ExprStmt (TypeAssertExpr (Ident y ) (SelectorExpr (Ident io ) "
"(Ident Reader ) ) ) ) ",
"y.(io.Reader)");
}
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