Hi Sam, Thanks for looking into this. Just to clarify, the real issue is the divide by zero errors. The encoding related messages are only warnings.
JSONExprTests.cpp(134): error C2124: divide or mod by zero Douglas Yung From: Sam McCall [mailto:sam.mcc...@gmail.com] Sent: Tuesday, November 21, 2017 11:07 To: Yung, Douglas Cc: cfe-commits Subject: Re: [clang-tools-extra] r318774 - [clangd] Add parsing and value inspection to JSONExpr. Hi Douglas, Sorry about that! It's an encoding problem, I forgot there were encodings other than UTF-8 :-) I'll fix it. Thanks for the heads up. On Tue, Nov 21, 2017 at 7:56 PM, Yung, Douglas <douglas.y...@sony.com<mailto:douglas.y...@sony.com>> wrote: Hi Sam, Your change is causing the PS4 Windows bot to fail because your test includes a divide by zero exception that the compiler is issuing an error for: http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast/builds/13639/ FAILED: tools/clang/tools/extra/unittests/clangd/CMakeFiles/ClangdTests.dir/JSONExprTests.cpp.obj C:\PROGRA~2\MICROS~1.0\VC\bin\cl.exe /nologo /TP -DGTEST_HAS_RTTI=0 -DGTEST_HAS_TR1_TUPLE=0 -DGTEST_LANG_CXX11=1 -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -D_HAS_EXCEPTIONS=0 -D_LARGEFILE_SOURCE -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -Itools\clang\tools\extra\unittests\clangd -IC:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\tools\extra\unittests\clangd -IC:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\include -Itools\clang\include -Iinclude -IC:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\include -IC:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\tools\extra\clangd -IC:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\utils\unittest\googletest\include -IC:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\utils\unittest\googlemock\include /DWIN32 /D_WINDOWS /Zc:inline /Zc:strictStrings /Oi /Zc:rvalueCast /W4 -wd4141 -wd4146 -wd4180 -wd4244 -wd4258 -wd4267 -wd4291 -wd4345 -wd4351 -wd4355 -wd4456 -wd4457 -wd4458 -wd4459 -wd4503 -wd4624 -wd4722 -wd4800 -wd4100 -wd4127 -wd4512 -wd4505 -wd4610 -wd4510 -wd4702 -wd4245 -wd4706 -wd4310 -wd4701 -wd4703 -wd4389 -wd4611 -wd4805 -wd4204 -wd4577 -wd4091 -wd4592 -wd4319 -wd4324 -w14062 -we4238 /MD /O2 /Ob2 -UNDEBUG /EHs-c- /GR- /showIncludes /Fotools\clang\tools\extra\unittests\clangd\CMakeFiles\ClangdTests.dir\JSONExprTests.cpp.obj /Fdtools\clang\tools\extra\unittests\clangd\CMakeFiles\ClangdTests.dir\ /FS -c C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\tools\extra\unittests\clangd\JSONExprTests.cpp C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\tools\extra\unittests\clangd\JSONExprTests.cpp(140): warning C4566: character represented by universal-character-name '\U00010437' cannot be represented in the current code page (1252) C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\tools\extra\unittests\clangd\JSONExprTests.cpp(141): warning C4566: character represented by universal-character-name '\U0001D11E' cannot be represented in the current code page (1252) C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\tools\extra\unittests\clangd\JSONExprTests.cpp(142): warning C4566: character represented by universal-character-name '\uFFFD' cannot be represented in the current code page (1252) C:\ps4-buildslave2\llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast\llvm.src\tools\clang\tools\extra\unittests\clangd\JSONExprTests.cpp(134): error C2124: divide or mod by zero Can you fix this so that we can get the bot green again? Thanks! Douglas Yung > -----Original Message----- > From: cfe-commits > [mailto:cfe-commits-boun...@lists.llvm.org<mailto:cfe-commits-boun...@lists.llvm.org>] > On Behalf Of Sam > McCall via cfe-commits > Sent: Tuesday, November 21, 2017 8:01 > To: cfe-commits@lists.llvm.org<mailto:cfe-commits@lists.llvm.org> > Subject: [clang-tools-extra] r318774 - [clangd] Add parsing and value > inspection to JSONExpr. > > Author: sammccall > Date: Tue Nov 21 08:00:53 2017 > New Revision: 318774 > > URL: http://llvm.org/viewvc/llvm-project?rev=318774&view=rev > Log: > [clangd] Add parsing and value inspection to JSONExpr. > > Summary: > This will replace the places where we're using YAMLParser to parse JSON now: > - the new marshalling code (T::parse()) should handle fewer cases and > require > fewer explicit casts > - we'll early-reject invalid JSON that YAMLParser accepts > - we'll be able to fix protocol-parsing bugs caused by the fact that YAML > can > only parse forward > > I plan to do the conversion as soon as this lands, but I don't want it in one > patch as the protocol.cpp changes are conflict-prone. > > Reviewers: ioeric > > Subscribers: ilya-biryukov, cfe-commits > > Differential Revision: https://reviews.llvm.org/D40182 > > Modified: > clang-tools-extra/trunk/clangd/JSONExpr.cpp > clang-tools-extra/trunk/clangd/JSONExpr.h > clang-tools-extra/trunk/unittests/clangd/JSONExprTests.cpp > > Modified: clang-tools-extra/trunk/clangd/JSONExpr.cpp > URL: http://llvm.org/viewvc/llvm-project/clang-tools- > extra/trunk/clangd/JSONExpr.cpp?rev=318774&r1=318773&r2=318774&view=diff > ============================================================================== > --- clang-tools-extra/trunk/clangd/JSONExpr.cpp (original) > +++ clang-tools-extra/trunk/clangd/JSONExpr.cpp Tue Nov 21 08:00:53 2017 > @@ -22,10 +22,10 @@ void Expr::copyFrom(const Expr &M) { > create<std::string>(M.as<std::string>()); > break; > case T_Object: > - create<Object>(M.as<Object>()); > + create<ObjectExpr>(M.as<ObjectExpr>()); > break; > case T_Array: > - create<Array>(M.as<Array>()); > + create<ArrayExpr>(M.as<ArrayExpr>()); > break; > } > } > @@ -46,11 +46,11 @@ void Expr::moveFrom(const Expr &&M) { > M.Type = T_Null; > break; > case T_Object: > - create<Object>(std::move(M.as<Object>())); > + create<ObjectExpr>(std::move(M.as<ObjectExpr>())); > M.Type = T_Null; > break; > case T_Array: > - create<Array>(std::move(M.as<Array>())); > + create<ArrayExpr>(std::move(M.as<ArrayExpr>())); > M.Type = T_Null; > break; > } > @@ -69,14 +69,318 @@ void Expr::destroy() { > as<std::string>().~basic_string(); > break; > case T_Object: > - as<Object>().~Object(); > + as<ObjectExpr>().~ObjectExpr(); > break; > case T_Array: > - as<Array>().~Array(); > + as<ArrayExpr>().~ArrayExpr(); > break; > } > } > > +namespace { > +// Simple recursive-descent JSON parser. > +class Parser { > +public: > + Parser(StringRef JSON) > + : Start(JSON.begin()), P(JSON.begin()), End(JSON.end()) {} > + > + bool parseExpr(Expr &Out); > + > + bool assertEnd() { > + eatWhitespace(); > + if (P == End) > + return true; > + return parseError("Text after end of document"); } > + > + Error takeError() { > + assert(Error); > + return std::move(*Error); > + } > + > +private: > + void eatWhitespace() { > + while (P != End && (*P == ' ' || *P == '\r' || *P == '\n' || *P == '\t')) > + ++P; > + } > + > + // On invalid syntax, parseX() functions return false and and set Error. > + bool parseNumber(char First, double &Out); bool > + parseString(std::string &Out); bool parseUnicode(std::string &Out); > + bool parseError(const char *Msg); // always returns false > + > + char next() { return P == End ? 0 : *P++; } char peek() { return P > + == End ? 0 : *P; } static bool isNumber(char C) { > + return C == '0' || C == '1' || C == '2' || C == '3' || C == '4' || > + C == '5' || C == '6' || C == '7' || C == '8' || C == '9' || > + C == 'e' || C == 'E' || C == '+' || C == '-' || C == '.'; } > + static void encodeUtf8(uint32_t Rune, std::string &Out); > + > + Optional<Error> Error; > + const char *Start, *P, *End; > +}; > + > +bool Parser::parseExpr(Expr &Out) { > + eatWhitespace(); > + if (P == End) > + return parseError("Unexpected EOF"); > + switch (char C = next()) { > + // Bare null/true/false are easy - first char identifies them. > + case 'n': > + Out = nullptr; > + return (next() == 'u' && next() == 'l' && next() == 'l') || > + parseError("Invalid bareword"); > + case 't': > + Out = true; > + return (next() == 'r' && next() == 'u' && next() == 'e') || > + parseError("Invalid bareword"); > + case 'f': > + Out = false; > + return (next() == 'a' && next() == 'l' && next() == 's' && next() == 'e') > || > + parseError("Invalid bareword"); > + case '"': { > + std::string S; > + if (parseString(S)) { > + Out = std::move(S); > + return true; > + } > + return false; > + } > + case '[': { > + Out = json::ary{}; > + json::ary &A = *Out.array(); > + eatWhitespace(); > + if (peek() == ']') { > + ++P; > + return true; > + } > + for (;;) { > + A.emplace_back(nullptr); > + if (!parseExpr(A.back())) > + return false; > + eatWhitespace(); > + switch (next()) { > + case ',': > + eatWhitespace(); > + continue; > + case ']': > + return true; > + default: > + return parseError("Expected , or ] after array element"); > + } > + } > + } > + case '{': { > + Out = json::obj{}; > + json::obj &O = *Out.object(); > + eatWhitespace(); > + if (peek() == '}') { > + ++P; > + return true; > + } > + for (;;) { > + if (next() != '"') > + return parseError("Expected object key"); > + std::string K; > + if (!parseString(K)) > + return false; > + eatWhitespace(); > + if (next() != ':') > + return parseError("Expected : after object key"); > + eatWhitespace(); > + if (!parseExpr(O[std::move(K)])) > + return false; > + eatWhitespace(); > + switch (next()) { > + case ',': > + eatWhitespace(); > + continue; > + case '}': > + return true; > + default: > + return parseError("Expected , or } after object property"); > + } > + } > + } > + default: > + if (isNumber(C)) { > + double Num; > + if (parseNumber(C, Num)) { > + Out = Num; > + return true; > + } else { > + return false; > + } > + } > + return parseError("Expected JSON value"); > + } > +} > + > +bool Parser::parseNumber(char First, double &Out) { > + SmallString<24> S; > + S.push_back(First); > + while (isNumber(peek())) > + S.push_back(next()); > + char *End; > + Out = std::strtod(S.c_str(), &End); > + return End == S.end() || parseError("Invalid number"); } > + > +bool Parser::parseString(std::string &Out) { > + // leading quote was already consumed. > + for (char C = next(); C != '"'; C = next()) { > + if (LLVM_UNLIKELY(P == End)) > + return parseError("Unterminated string"); > + if (LLVM_UNLIKELY((C & 0x1f) == C)) > + return parseError("Control character in string"); > + if (LLVM_LIKELY(C != '\\')) { > + Out.push_back(C); > + continue; > + } > + // Handle escape sequence. > + switch (C = next()) { > + case '"': > + case '\\': > + case '/': > + Out.push_back(C); > + break; > + case 'b': > + Out.push_back('\b'); > + break; > + case 'f': > + Out.push_back('\f'); > + break; > + case 'n': > + Out.push_back('\n'); > + break; > + case 'r': > + Out.push_back('\r'); > + break; > + case 't': > + Out.push_back('\t'); > + break; > + case 'u': > + if (!parseUnicode(Out)) > + return false; > + break; > + default: > + return parseError("Invalid escape sequence"); > + } > + } > + return true; > +} > + > +void Parser::encodeUtf8(uint32_t Rune, std::string &Out) { > + if (Rune <= 0x7F) { > + Out.push_back(Rune & 0x7F); > + } else if (Rune <= 0x7FF) { > + uint8_t FirstByte = 0xC0 | ((Rune & 0x7C0) >> 6); > + uint8_t SecondByte = 0x80 | (Rune & 0x3F); > + Out.push_back(FirstByte); > + Out.push_back(SecondByte); > + } else if (Rune <= 0xFFFF) { > + uint8_t FirstByte = 0xE0 | ((Rune & 0xF000) >> 12); > + uint8_t SecondByte = 0x80 | ((Rune & 0xFC0) >> 6); > + uint8_t ThirdByte = 0x80 | (Rune & 0x3F); > + Out.push_back(FirstByte); > + Out.push_back(SecondByte); > + Out.push_back(ThirdByte); > + } else if (Rune <= 0x10FFFF) { > + uint8_t FirstByte = 0xF0 | ((Rune & 0x1F0000) >> 18); > + uint8_t SecondByte = 0x80 | ((Rune & 0x3F000) >> 12); > + uint8_t ThirdByte = 0x80 | ((Rune & 0xFC0) >> 6); > + uint8_t FourthByte = 0x80 | (Rune & 0x3F); > + Out.push_back(FirstByte); > + Out.push_back(SecondByte); > + Out.push_back(ThirdByte); > + Out.push_back(FourthByte); > + } else { > + llvm_unreachable("Invalid codepoint"); > + } > +} > + > +// Parse a \uNNNN escape sequence, the \u have already been consumed. > +// May parse multiple escapes in the presence of surrogate pairs. > +bool Parser::parseUnicode(std::string &Out) { > + // Note that invalid unicode is not a JSON error. It gets replaced by > U+FFFD. > + auto Invalid = [&] { Out.append(/* UTF-8 */ {'\xef', '\xbf', > +'\xbd'}); }; > + auto Parse4Hex = [this](uint16_t &Out) { > + Out = 0; > + char Bytes[] = {next(), next(), next(), next()}; > + for (unsigned char C : Bytes) { > + if (!std::isxdigit(C)) > + return parseError("Invalid \\u<file:///\\u> escape sequence"); > + Out <<= 4; > + Out |= (C > '9') ? (C & ~0x20) - 'A' + 10 : (C - '0'); > + } > + return true; > + }; > + uint16_t First; > + if (!Parse4Hex(First)) > + return false; > + > + // We loop to allow proper surrogate-pair error handling. > + while (true) { > + if (LLVM_LIKELY(First < 0xD800 || First >= 0xE000)) { // BMP. > + encodeUtf8(First, Out); > + return true; > + } > + > + if (First >= 0xDC00) { > + Invalid(); // Lone trailing surrogate. > + return true; > + } > + > + // We have a leading surrogate, and need a trailing one. > + // Don't advance P: a lone surrogate is valid JSON (but invalid unicode) > + if (P + 2 > End || *P != '\\' || *(P + 1) != 'u') { > + Invalid(); // Lone leading not followed by \u... > + return true; > + } > + P += 2; > + uint16_t Second; > + if (!Parse4Hex(Second)) > + return false; > + if (Second < 0xDC00 && Second >= 0xE000) { > + Invalid(); // Leading surrogate not followed by trailing. > + First = Second; // Second escape still needs to be processed. > + continue; > + } > + > + // Valid surrogate pair. > + encodeUtf8(0x10000 | ((First - 0xD800) << 10) | (Second - 0xDC00), Out); > + return true; > + } > +} > + > +bool Parser::parseError(const char *Msg) { > + int Line = 1; > + const char *StartOfLine = Start; > + for (const char *X = Start; X < P; ++X) { > + if (*X == 0x0A) { > + ++Line; > + StartOfLine = X + 1; > + } > + } > + Error.emplace( > + llvm::make_unique<ParseError>(Msg, Line, P - StartOfLine, P - > +Start)); > + return false; > +} > +} // namespace > + > +Expected<Expr> parse(StringRef JSON) { > + Parser P(JSON); > + json::Expr E = nullptr; > + if (P.parseExpr(E)) > + if (P.assertEnd()) > + return std::move(E); > + return P.takeError(); > +} > +char ParseError::ID = 0; > + > } // namespace json > } // namespace clangd > } // namespace clang > @@ -144,7 +448,7 @@ void clang::clangd::json::Expr::print(ra > bool Comma = false; > OS << '{'; > I(Indent); > - for (const auto &P : as<Expr::Object>()) { > + for (const auto &P : as<Expr::ObjectExpr>()) { > if (Comma) > OS << ','; > Comma = true; > @@ -164,7 +468,7 @@ void clang::clangd::json::Expr::print(ra > bool Comma = false; > OS << '['; > I(Indent); > - for (const auto &E : as<Expr::Array>()) { > + for (const auto &E : as<Expr::ArrayExpr>()) { > if (Comma) > OS << ','; > Comma = true; > @@ -187,6 +491,25 @@ llvm::raw_ostream &operator<<(raw_ostrea > E.print(OS, [](IndenterAction A) { /*ignore*/ }); > return OS; > } > + > +bool operator==(const Expr &L, const Expr &R) { > + if (L.kind() != R.kind()) > + return false; > + switch (L.kind()) { > + case Expr::Null: > + return L.null() == R.null(); > + case Expr::Boolean: > + return L.boolean() == R.boolean(); > + case Expr::Number: > + return L.boolean() == R.boolean(); > + case Expr::String: > + return L.string() == R.string(); > + case Expr::Array: > + return *L.array() == *R.array(); > + case Expr::Object: > + return *L.object() == *R.object(); > + } > +} > } // namespace json > } // namespace clangd > } // namespace clang > > Modified: clang-tools-extra/trunk/clangd/JSONExpr.h > URL: http://llvm.org/viewvc/llvm-project/clang-tools- > extra/trunk/clangd/JSONExpr.h?rev=318774&r1=318773&r2=318774&view=diff > ============================================================================== > --- clang-tools-extra/trunk/clangd/JSONExpr.h (original) > +++ clang-tools-extra/trunk/clangd/JSONExpr.h Tue Nov 21 08:00:53 2017 > @@ -1,4 +1,4 @@ > -//===--- JSONExpr.h - composable JSON expressions ---------------*- C++ -*- > ===// > +//===--- JSONExpr.h - JSON expressions, parsing and serialization - C++ > +-*-===// > // > // The LLVM Compiler Infrastructure > // > @@ -7,6 +7,8 @@ > // > //===--------------------------------------------------------------------- > ===// > > +// FIXME: rename to JSON.h now that the scope is wider? > + > #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANGD_JSON_H > #define LLVM_CLANG_TOOLS_EXTRA_CLANGD_JSON_H > > @@ -14,6 +16,7 @@ > > #include "llvm/ADT/SmallVector.h" > #include "llvm/ADT/StringRef.h" > +#include "llvm/Support/Error.h" > #include "llvm/Support/FormatVariadic.h" > #include "llvm/Support/raw_ostream.h" > > @@ -21,10 +24,12 @@ namespace clang { > namespace clangd { > namespace json { > > -// An Expr is an opaque temporary JSON structure used to compose documents. > +// An Expr is an JSON value of unknown type. > // They can be copied, but should generally be moved. > // > -// You can implicitly construct literals from: > +// === Composing expressions === > +// > +// You can implicitly construct Exprs from: > // - strings: std::string, SmallString, formatv, StringRef, char* > // (char*, and StringRef are references, not copies!) > // - numbers > @@ -39,25 +44,62 @@ namespace json { > // These can be list-initialized, or used to build up collections in a loop. > // json::ary(Collection) converts all items in a collection to Exprs. > // > +// === Inspecting expressions === > +// > +// Each Expr is one of the JSON kinds: > +// null (nullptr_t) > +// boolean (bool) > +// number (double) > +// string (StringRef) > +// array (json::ary) > +// object (json::obj) > +// > +// The kind can be queried directly, or implicitly via the typed accessors: > +// if (Optional<StringRef> S = E.string()) > +// assert(E.kind() == Expr::String); > +// > +// Array and Object also have typed indexing accessors for easy traversal: > +// Expected<Expr> E = parse(R"( {"options": {"font": "sans-serif"}} )"); > +// if (json::obj* O = E->object()) > +// if (json::obj* Opts = O->object("options")) > +// if (Optional<StringRef> Font = Opts->string("font")) > +// assert(Opts->at("font").kind() == Expr::String); > +// > +// === Serialization === > +// > // Exprs can be serialized to JSON: > // 1) raw_ostream << Expr // Basic formatting. > // 2) raw_ostream << formatv("{0}", Expr) // Basic formatting. > // 3) raw_ostream << formatv("{0:2}", Expr) // Pretty-print with indent 2. > +// > +// And parsed: > +// Expected<Expr> E = json::parse("[1, 2, null]"); > +// assert(E && E->kind() == Expr::Array); > class Expr { > public: > - class Object; > + enum Kind { > + Null, > + Boolean, > + Number, > + String, > + Array, > + Object, > + }; > + class ObjectExpr; > class ObjectKey; > - class Array; > + class ArrayExpr; > > // It would be nice to have Expr() be null. But that would make {} null > too... > Expr(const Expr &M) { copyFrom(M); } > Expr(Expr &&M) { moveFrom(std::move(M)); } > // "cheating" move-constructor for moving from initializer_list. > Expr(const Expr &&M) { moveFrom(std::move(M)); } > - Expr(std::initializer_list<Expr> Elements) : Expr(Array(Elements)) {} > - Expr(Array &&Elements) : Type(T_Array) { > create<Array>(std::move(Elements)); } > - Expr(Object &&Properties) : Type(T_Object) { > - create<Object>(std::move(Properties)); > + Expr(std::initializer_list<Expr> Elements) : > + Expr(ArrayExpr(Elements)) {} Expr(ArrayExpr &&Elements) : Type(T_Array) { > + create<ArrayExpr>(std::move(Elements)); > + } > + Expr(ObjectExpr &&Properties) : Type(T_Object) { > + create<ObjectExpr>(std::move(Properties)); > } > // Strings: types with value semantics. > Expr(std::string &&V) : Type(T_String) { create<std::string>(std::move(V)); > } @@ -104,6 +146,60 @@ public: > } > ~Expr() { destroy(); } > > + Kind kind() const { > + switch (Type) { > + case T_Null: > + return Null; > + case T_Boolean: > + return Boolean; > + case T_Number: > + return Number; > + case T_String: > + case T_StringRef: > + return String; > + case T_Object: > + return Object; > + case T_Array: > + return Array; > + } > + } > + > + // Typed accessors return None/nullptr if the Expr is not of this type. > + llvm::Optional<std::nullptr_t> null() const { > + if (LLVM_LIKELY(Type == T_Null)) > + return nullptr; > + return llvm::None; > + } > + llvm::Optional<bool> boolean() const { > + if (LLVM_LIKELY(Type == T_Null)) > + return as<bool>(); > + return llvm::None; > + } > + llvm::Optional<double> number() const { > + if (LLVM_LIKELY(Type == T_Number)) > + return as<double>(); > + return llvm::None; > + } > + llvm::Optional<llvm::StringRef> string() const { > + if (Type == T_String) > + return llvm::StringRef(as<std::string>()); > + if (LLVM_LIKELY(Type == T_StringRef)) > + return as<llvm::StringRef>(); > + return llvm::None; > + } > + const ObjectExpr *object() const { > + return LLVM_LIKELY(Type == T_Object) ? &as<ObjectExpr>() : nullptr; > + } ObjectExpr *object() { > + return LLVM_LIKELY(Type == T_Object) ? &as<ObjectExpr>() : nullptr; > + } const ArrayExpr *array() const { > + return LLVM_LIKELY(Type == T_Array) ? &as<ArrayExpr>() : nullptr; > + } ArrayExpr *array() { > + return LLVM_LIKELY(Type == T_Array) ? &as<ArrayExpr>() : nullptr; > + } > + > friend llvm::raw_ostream &operator<<(llvm::raw_ostream &, const Expr &); > > private: > @@ -137,10 +233,8 @@ private: > mutable ExprType Type; > > public: > - // ObjectKey is a used to capture keys in Expr::Objects. It's like Expr > but: > + // ObjectKey is a used to capture keys in Expr::ObjectExpr. Like Expr but: > // - only strings are allowed > - // - it's copyable (for std::map) > - // - we're slightly more eager to copy, to allow efficient key compares > // - it's optimized for the string literal case (Owned == nullptr) > class ObjectKey { > public: > @@ -183,12 +277,12 @@ public: > llvm::StringRef Data; > }; > > - class Object : public std::map<ObjectKey, Expr> { > + class ObjectExpr : public std::map<ObjectKey, Expr> { > public: > - explicit Object() {} > + explicit ObjectExpr() {} > // Use a custom struct for list-init, because pair forces extra copies. > struct KV; > - explicit Object(std::initializer_list<KV> Properties); > + explicit ObjectExpr(std::initializer_list<KV> Properties); > > // Allow [] as if Expr was default-constructible as null. > Expr &operator[](const ObjectKey &K) { @@ -199,15 +293,15 @@ public: > } > }; > > - class Array : public std::vector<Expr> { > + class ArrayExpr : public std::vector<Expr> { > public: > - explicit Array() {} > - explicit Array(std::initializer_list<Expr> Elements) { > + explicit ArrayExpr() {} > + explicit ArrayExpr(std::initializer_list<Expr> Elements) { > reserve(Elements.size()); > for (const Expr &V : Elements) > emplace_back(std::move(V)); > }; > - template <typename Collection> explicit Array(const Collection &C) { > + template <typename Collection> explicit ArrayExpr(const Collection > + &C) { > for (const auto &V : C) > emplace_back(V); > } > @@ -215,23 +309,50 @@ public: > > private: > mutable llvm::AlignedCharArrayUnion<bool, double, llvm::StringRef, > - std::string, Array, Object> > + std::string, ArrayExpr, > + ObjectExpr> > Union; > }; > > -struct Expr::Object::KV { > +bool operator==(const Expr &, const Expr &); inline bool > +operator!=(const Expr &L, const Expr &R) { return !(L == R); } inline > +bool operator==(const Expr::ObjectKey &L, const Expr::ObjectKey &R) { > + return llvm::StringRef(L) == llvm::StringRef(R); } inline bool > +operator!=(const Expr::ObjectKey &L, const Expr::ObjectKey &R) { > + return !(L == R); > +} > + > +struct Expr::ObjectExpr::KV { > ObjectKey K; > Expr V; > }; > > -inline Expr::Object::Object(std::initializer_list<KV> Properties) { > +inline Expr::ObjectExpr::ObjectExpr(std::initializer_list<KV> > +Properties) { > for (const auto &P : Properties) > emplace(std::move(P.K), std::move(P.V)); } > > // Give Expr::{Object,Array} more convenient names for literal use. > -using obj = Expr::Object; > -using ary = Expr::Array; > +using obj = Expr::ObjectExpr; > +using ary = Expr::ArrayExpr; > + > +llvm::Expected<Expr> parse(llvm::StringRef JSON); > + > +class ParseError : public llvm::ErrorInfo<ParseError> { > + const char *Msg; > + unsigned Line, Column, Offset; > + > +public: > + static char ID; > + ParseError(const char *Msg, unsigned Line, unsigned Column, unsigned > Offset) > + : Msg(Msg), Line(Line), Column(Column), Offset(Offset) {} > + void log(llvm::raw_ostream &OS) const override { > + OS << llvm::formatv("[{0}:{1}, byte={2}]: {3}", Line, Column, > +Offset, Msg); > + } > + std::error_code convertToErrorCode() const override { > + return llvm::inconvertibleErrorCode(); > + } > +}; > > } // namespace json > } // namespace clangd > > Modified: clang-tools-extra/trunk/unittests/clangd/JSONExprTests.cpp > URL: http://llvm.org/viewvc/llvm-project/clang-tools- > extra/trunk/unittests/clangd/JSONExprTests.cpp?rev=318774&r1=318773&r2=318774& > view=diff > ============================================================================== > --- clang-tools-extra/trunk/unittests/clangd/JSONExprTests.cpp (original) > +++ clang-tools-extra/trunk/unittests/clangd/JSONExprTests.cpp Tue Nov > +++ 21 08:00:53 2017 > @@ -15,6 +15,9 @@ > namespace clang { > namespace clangd { > namespace json { > +void PrintTo(const Expr &E, std::ostream *OS) { > + llvm::raw_os_ostream(*OS) << llvm::formatv("{0:2}", E); } > namespace { > > std::string s(const Expr &E) { return llvm::formatv("{0}", E).str(); } @@ - > 108,6 +111,77 @@ TEST(JSONExprTests, PrettyPrinting) { > })); > } > > +TEST(JSONTest, Parse) { > + auto Compare = [](llvm::StringRef S, Expr Expected) { > + if (auto E = parse(S)) { > + // Compare both string forms and with operator==, in case we have bugs. > + EXPECT_EQ(*E, Expected); > + EXPECT_EQ(sp(*E), sp(Expected)); > + } else { > + handleAllErrors(E.takeError(), [S](const llvm::ErrorInfoBase &E) { > + FAIL() << "Failed to parse JSON >>> " << S << " <<<: " << > E.message(); > + }); > + } > + }; > + > + Compare(R"(true)", true); > + Compare(R"(false)", false); > + Compare(R"(null)", nullptr); > + > + Compare(R"(42)", 42); > + Compare(R"(2.5)", 2.5); > + Compare(R"(2e50)", 2e50); > + Compare(R"(1.2e3456789)", 1.0 / 0.0); > + > + Compare(R"("foo")", "foo"); > + Compare(R"("\"\\\b\f\n\r\t<file:///\\\b\f\n\r\t>")", > "\"\\\b\f\n\r\t<file:///\\\b\f\n\r\t>"); > + Compare(R"("\u0000")", llvm::StringRef("\0", 1)); Compare("\"\x7f\"", > + "\x7f"); Compare(R"("\ud801\udc37")", "\U00010437"); // UTF16 > + surrogate pair escape. > + Compare("\"\xE2\x82\xAC\xF0\x9D\x84\x9E\"", "\u20ac\U0001d11e"); // > + UTF8 Compare(R"("\ud801")", "\ufffd"); // Invalid codepoint. > + > + Compare(R"({"":0,"":0})", obj{{"", 0}}); > + Compare(R"({"obj":{},"arr":[]})", obj{{"obj", obj{}}, {"arr", {}}}); > + Compare(R"({"\n":{"\u0000":[[[[]]]]}})", > + obj{{"\n", obj{ > + {llvm::StringRef("\0", 1), {{{{}}}}}, > + }}}); > + Compare("\r[\n\t] ", {}); > +} > + > +TEST(JSONTest, ParseErrors) { > + auto ExpectErr = [](llvm::StringRef Msg, llvm::StringRef S) { > + if (auto E = parse(S)) { > + // Compare both string forms and with operator==, in case we have bugs. > + FAIL() << "Parsed JSON >>> " << S << " <<< but wanted error: " << Msg; > + } else { > + handleAllErrors(E.takeError(), [S, Msg](const llvm::ErrorInfoBase &E) { > + EXPECT_THAT(E.message(), testing::HasSubstr(Msg)) << S; > + }); > + } > + }; > + ExpectErr("Unexpected EOF", ""); > + ExpectErr("Unexpected EOF", "["); > + ExpectErr("Text after end of document", "[][]"); > + ExpectErr("Text after end of document", "[][]"); > + ExpectErr("Invalid bareword", "fuzzy"); > + ExpectErr("Expected , or ]", "[2?]"); > + ExpectErr("Expected object key", "{a:2}"); > + ExpectErr("Expected : after object key", R"({"a",2})"); > + ExpectErr("Expected , or } after object property", R"({"a":2 > +"b":3})"); > + ExpectErr("Expected JSON value", R"([&%!])"); > + ExpectErr("Invalid number", "1e1.0"); > + ExpectErr("Unterminated string", R"("abc\"def)"); > + ExpectErr("Control character in string", "\"abc\ndef\""); > + ExpectErr("Invalid escape sequence", R"("\030")"); > + ExpectErr("Invalid \\u<file:///\\u> escape sequence", R"("\usuck")"); > + ExpectErr("[3:3, byte=19]", R"({ > + "valid": 1, > + invalid: 2 > +})"); > +} > + > } // namespace > } // namespace json > } // namespace clangd > > > _______________________________________________ > cfe-commits mailing list > cfe-commits@lists.llvm.org<mailto:cfe-commits@lists.llvm.org> > http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
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