srdjan@google.com
9e77768c91
Add tests for incorrect literals, e.g. "+ 5". Added a temporary token kTIGHTADD that represents an ADD not terminated by a whitespace. It is temporary and eliminated in the parser (code generator ot AST do not see it). It is used to recognize correct literals. Review URL: https://chromiumcodereview.appspot.com//9264051 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@3745 260f80e4-7a28-3924-810f-c04153c831b5
371 lines
10 KiB
C++
371 lines
10 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "platform/assert.h"
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#include "vm/os.h"
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#include "vm/scanner.h"
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#include "vm/token.h"
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#include "vm/unit_test.h"
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namespace dart {
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void LogTokenDesc(Scanner::TokenDescriptor token) {
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OS::Print("pos %2d:%d-%d token %s ",
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token.position.line, token.position.column,
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token.position.column + token.length,
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Token::Name(token.kind));
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if (token.literal != NULL) {
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OS::Print("%s", token.literal->ToCString());
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}
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OS::Print("\n");
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}
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void LogTokenStream(const Scanner::GrowableTokenStream& token_stream) {
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int token_index = 0;
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EXPECT_GT(token_stream.length(), 0);
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while (token_index < token_stream.length()) {
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LogTokenDesc(token_stream[token_index]);
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ASSERT(token_stream[token_index].kind != Token::kILLEGAL);
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token_index++;
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}
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printf("%d tokens in stream.\n", token_index);
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EXPECT_EQ(token_stream.Last().kind, Token::kEOS);
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}
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void CheckKind(const Scanner::GrowableTokenStream &token_stream,
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int index,
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Token::Kind kind) {
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if (token_stream[index].kind != kind) {
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OS::PrintErr("Token %d: expected kind %s but got %s\n", index,
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Token::Name(token_stream[index].kind), Token::Name(kind));
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}
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EXPECT_EQ(kind, token_stream[index].kind);
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}
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void CheckLiteral(const Scanner::GrowableTokenStream& token_stream,
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int index,
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const char* literal) {
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if (token_stream[index].literal == NULL) {
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OS::PrintErr("Token %d: expected literal \"%s\" but got nothing\n",
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index, literal);
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} else if (strcmp(literal, token_stream[index].literal->ToCString())) {
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OS::PrintErr("Token %d: expected literal \"%s\" but got \"%s\"\n",
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index, literal, token_stream[index].literal->ToCString());
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}
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}
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void CheckIdent(const Scanner::GrowableTokenStream& token_stream,
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int index,
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const char* literal) {
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CheckKind(token_stream, index, Token::kIDENT);
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CheckLiteral(token_stream, index, literal);
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}
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void CheckInteger(const Scanner::GrowableTokenStream& token_stream,
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int index,
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const char* literal) {
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CheckKind(token_stream, index, Token::kINTEGER);
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CheckLiteral(token_stream, index, literal);
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}
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void CheckLineNumber(const Scanner::GrowableTokenStream& token_stream,
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int index,
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int line_number) {
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if (token_stream[index].position.line != line_number) {
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OS::PrintErr("Token %d: expected line number %d but got %d\n",
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index, line_number, token_stream[index].position.line);
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}
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}
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void CheckNumTokens(const Scanner::GrowableTokenStream& token_stream,
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int index) {
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if (token_stream.length() != index) {
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OS::PrintErr("Expected %d tokens but got only %d.\n",
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index, token_stream.length());
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}
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}
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const Scanner::GrowableTokenStream& Scan(const char* source) {
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Scanner scanner(String::Handle(String::New(source)),
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String::Handle(String::New("")));
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OS::Print("\nScanning: <%s>\n", source);
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const Scanner::GrowableTokenStream& tokens = scanner.GetStream();
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LogTokenStream(tokens);
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return tokens;
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}
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void BoringTest() {
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const Scanner::GrowableTokenStream& tokens = Scan("x = iffy++;");
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CheckNumTokens(tokens, 6);
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CheckIdent(tokens, 0, "x");
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CheckKind(tokens, 1, Token::kASSIGN);
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CheckIdent(tokens, 2, "iffy");
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CheckKind(tokens, 3, Token::kINCR);
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CheckKind(tokens, 4, Token::kSEMICOLON);
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}
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void CommentTest() {
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const Scanner::GrowableTokenStream& tokens =
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Scan("Foo( /*block \n"
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"comment*/ 0xff) // line comment;");
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CheckNumTokens(tokens, 5);
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CheckIdent(tokens, 0, "Foo");
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CheckLineNumber(tokens, 0, 1);
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CheckKind(tokens, 1, Token::kLPAREN);
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CheckInteger(tokens, 2, "0xff");
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CheckKind(tokens, 3, Token::kRPAREN);
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CheckLineNumber(tokens, 3, 2);
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}
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void GreedIsGood() {
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// means i++ + j
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const Scanner::GrowableTokenStream& tokens = Scan("x=i+++j");
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CheckNumTokens(tokens, 7);
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CheckIdent(tokens, 0, "x");
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CheckKind(tokens, 1, Token::kASSIGN);
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CheckIdent(tokens, 2, "i");
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CheckKind(tokens, 3, Token::kINCR);
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CheckKind(tokens, 4, Token::kADD);
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CheckIdent(tokens, 5, "j");
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}
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void StringEscapes() {
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// sss = "\" \\ \n\r\t \'"
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const Scanner::GrowableTokenStream& tokens =
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Scan("sss = \"\\\" \\\\ \\n\\r\\t \\\'\"");
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EXPECT_EQ(4, tokens.length());
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CheckIdent(tokens, 0, "sss");
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CheckKind(tokens, 1, Token::kASSIGN);
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CheckKind(tokens, 2, Token::kSTRING);
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CheckKind(tokens, 3, Token::kEOS);
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CheckLineNumber(tokens, 2, 1);
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const char* litchars = (tokens)[2].literal->ToCString();
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EXPECT_EQ(9, (tokens)[2].literal->Length());
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EXPECT_EQ('"', litchars[0]);
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EXPECT_EQ(' ', litchars[1]);
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EXPECT_EQ('\\', litchars[2]);
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EXPECT_EQ('\n', litchars[4]);
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EXPECT_EQ('\r', litchars[5]);
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EXPECT_EQ('\t', litchars[6]);
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EXPECT_EQ('\'', litchars[8]);
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}
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void RawString() {
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// rs = @"\' \\"
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const Scanner::GrowableTokenStream& tokens = Scan("rs = @\"\\\' \\\\\"");
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EXPECT_EQ(4, tokens.length());
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CheckIdent(tokens, 0, "rs");
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CheckKind(tokens, 1, Token::kASSIGN);
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CheckKind(tokens, 2, Token::kSTRING);
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CheckKind(tokens, 3, Token::kEOS);
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CheckLineNumber(tokens, 2, 1);
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const char* litchars = (tokens)[2].literal->ToCString();
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EXPECT_EQ(5, (tokens)[2].literal->Length());
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EXPECT_EQ('\\', litchars[0]);
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EXPECT_EQ('\'', litchars[1]);
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EXPECT_EQ(' ', litchars[2]);
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EXPECT_EQ('\\', litchars[3]);
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EXPECT_EQ('\\', litchars[4]);
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}
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void MultilineString() {
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// |mls = '''
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// |1' x
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// |2''';
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const Scanner::GrowableTokenStream& tokens = Scan("mls = '''\n1' x\n2''';");
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EXPECT_EQ(5, tokens.length());
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CheckIdent(tokens, 0, "mls");
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CheckKind(tokens, 1, Token::kASSIGN);
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CheckKind(tokens, 2, Token::kSTRING);
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CheckKind(tokens, 3, Token::kSEMICOLON);
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CheckKind(tokens, 4, Token::kEOS);
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CheckLineNumber(tokens, 0, 1);
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CheckLineNumber(tokens, 4, 3); // Semicolon is on line 3.
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const char* litchars = (tokens)[2].literal->ToCString();
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EXPECT_EQ(6, (tokens)[2].literal->Length());
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EXPECT_EQ('1', litchars[0]); // First newline is dropped.
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EXPECT_EQ('\'', litchars[1]);
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EXPECT_EQ(' ', litchars[2]);
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EXPECT_EQ('x', litchars[3]);
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EXPECT_EQ('\n', litchars[4]);
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EXPECT_EQ('2', litchars[5]);
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}
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void EmptyString() {
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// es = "";
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const Scanner::GrowableTokenStream& tokens = Scan("es = \"\";");
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EXPECT_EQ(5, tokens.length());
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CheckIdent(tokens, 0, "es");
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CheckKind(tokens, 1, Token::kASSIGN);
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CheckKind(tokens, 2, Token::kSTRING);
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CheckKind(tokens, 3, Token::kSEMICOLON);
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CheckKind(tokens, 4, Token::kEOS);
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EXPECT_EQ(0, (tokens)[2].literal->Length());
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}
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void EmptyMultilineString() {
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// es = """""";
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const Scanner::GrowableTokenStream& tokens = Scan("es = \"\"\"\"\"\";");
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EXPECT_EQ(5, tokens.length());
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CheckIdent(tokens, 0, "es");
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CheckKind(tokens, 1, Token::kASSIGN);
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CheckKind(tokens, 2, Token::kSTRING);
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CheckKind(tokens, 3, Token::kSEMICOLON);
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CheckKind(tokens, 4, Token::kEOS);
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EXPECT_EQ(0, (tokens)[2].literal->Length());
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}
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void NumberLiteral() {
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const Scanner::GrowableTokenStream& tokens =
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Scan("5 0x5d 0.3 0.33 1E+12 .42 +5");
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CheckKind(tokens, 0, Token::kINTEGER);
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CheckKind(tokens, 1, Token::kINTEGER);
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CheckKind(tokens, 2, Token::kDOUBLE);
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CheckKind(tokens, 3, Token::kDOUBLE);
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CheckKind(tokens, 4, Token::kDOUBLE);
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CheckKind(tokens, 5, Token::kDOUBLE);
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CheckKind(tokens, 6, Token::kTIGHTADD);
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CheckKind(tokens, 7, Token::kINTEGER);
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CheckKind(tokens, 8, Token::kEOS);
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}
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void ScanLargeText() {
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const char* dart_source =
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"// This source is not meant to be valid Dart code. The text is used to"
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"// test the Dart scanner."
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""
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"// Cartesian point implemetation."
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"class Point {"
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""
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" // Constructor"
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" Point(Number x, Number y) : x(x), y(y) { }"
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""
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" // Addition for points."
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" Point operator +(Point other) {"
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" return new Point(x + other.x, y + other.y);"
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" }"
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""
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" // Fields are const and they cannot be changed."
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" const Number x;"
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" const Number y;"
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"}"
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""
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""
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"// Polar point class that implements the Point interface."
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"class PolarPoint implements Point {"
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""
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" PolarPoint(Number theta, Number radius)"
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" : theta(theta), radius(radius) { }"
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""
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" Number get x() { return radius * Math.cos(theta); }"
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" Number get y() { return radius * Math.sin(theta); }"
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""
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" const Number theta;"
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" const Number radius;"
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"}"
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""
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"interface Map<K extends Hashable,V> default HashMap<K, V> {"
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" V operator [](K key);"
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" void operator []=(K key, V value);"
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" void forEach(function f(K key, V value));"
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"}"
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""
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"class Foo {"
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" static const Array kMyArray = [1,2,3,4,5,6];"
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" static const Point kMyPoint = Point(1,2);"
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"}"
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""
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"class DequeEntry<T> implements QueueEntry<T>{"
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" DequeEntry<T> next;"
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" DequeEntry<T> previous;"
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" T value;"
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"}"
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""
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"void forEach(void function f(T element)) {"
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" for (int i = 0; i < this.length; i++) {"
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" f(this[i]);"
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" }"
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"}"
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""
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""
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"j!==!iffy // means j !== !iffy";
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Scan(dart_source);
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}
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void InvalidText() {
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const Scanner::GrowableTokenStream& tokens =
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Scan("\\");
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EXPECT_EQ(2, tokens.length());
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CheckKind(tokens, 0, Token::kERROR);
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CheckKind(tokens, 1, Token::kEOS);
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}
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void FindLineTest() {
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const char* source =
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"/*1*/ \n"
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"/*2*/ class A {\n"
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"/*3*/ void foo() { }\n"
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"/*4*/ }\n";
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Scanner scanner(String::Handle(String::New(source)),
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String::Handle(String::New("")));
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intptr_t token_index = scanner.TokenIndexAtLine(3);
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EXPECT_EQ(3, token_index);
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token_index = scanner.TokenIndexAtLine(100);
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EXPECT(token_index < 0);
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}
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TEST_CASE(Scanner_Test) {
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ScanLargeText();
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BoringTest();
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CommentTest();
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GreedIsGood();
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StringEscapes();
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RawString();
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MultilineString();
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EmptyString();
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EmptyMultilineString();
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NumberLiteral();
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InvalidText();
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FindLineTest();
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}
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} // namespace dart
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