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test-lex.cpp
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// Copyright (C) 2020 Matthew "strager" Glazar
// See end of file for extended copyright information.
#include <array>
#include <cstring>
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include <initializer_list>
#include <iostream>
#include <quick-lint-js/assert.h>
#include <quick-lint-js/characters.h>
#include <quick-lint-js/container/concat.h>
#include <quick-lint-js/container/linked-vector.h>
#include <quick-lint-js/container/padded-string.h>
#include <quick-lint-js/diag-matcher.h>
#include <quick-lint-js/diagnostic-assertion.h>
#include <quick-lint-js/fe/lex.h>
#include <quick-lint-js/fe/source-code-span.h>
#include <quick-lint-js/fe/token.h>
#include <quick-lint-js/gtest.h>
#include <quick-lint-js/parse-support.h>
#include <quick-lint-js/port/char8.h>
#include <quick-lint-js/port/memory-resource.h>
#include <quick-lint-js/port/source-location.h>
#include <quick-lint-js/util/cast.h>
#include <quick-lint-js/util/utf-8.h>
#include <string_view>
#include <type_traits>
#include <vector>
using namespace std::literals::string_view_literals;
using ::testing::ElementsAreArray;
using ::testing::IsEmpty;
using ::testing::UnorderedElementsAreArray;
using ::testing::VariantWith;
namespace quick_lint_js {
namespace {
// Contains pointers to objects inside a Lexer.
struct Tokens_And_Diags {
std::vector<Token> tokens;
Diag_List* diags;
};
class Test_Lex : public ::testing::Test {
protected:
// NOTE(strager): These functions take callbacks as function pointers to
// reduce build times. Templates and std::function are slow to compile.
void check_single_token(String8_View input,
String8_View expected_identifier_name,
Source_Location = Source_Location::current());
void check_single_token_with_errors(
String8_View input, Diagnostic_Assertion,
String8_View expected_identifier_name,
Source_Location = Source_Location::current());
void check_single_token_with_errors(
String8_View input, Diagnostic_Assertion, Diagnostic_Assertion,
String8_View expected_identifier_name,
Source_Location = Source_Location::current());
void check_single_token_with_errors(
String8_View input, Span<const Diagnostic_Assertion>,
String8_View expected_identifier_name,
Source_Location = Source_Location::current());
void check_tokens(String8_View input,
std::initializer_list<Token_Type> expected_token_types,
Source_Location = Source_Location::current());
void check_tokens(Padded_String_View input,
std::initializer_list<Token_Type> expected_token_types,
Source_Location = Source_Location::current());
void check_tokens_with_errors(
String8_View input, Diagnostic_Assertion,
std::initializer_list<Token_Type> expected_token_types,
Source_Location = Source_Location::current());
void check_tokens_with_errors(
String8_View input, Diagnostic_Assertion, Diagnostic_Assertion,
std::initializer_list<Token_Type> expected_token_types,
Source_Location = Source_Location::current());
void check_tokens_with_errors(
String8_View input, Diagnostic_Assertion, Diagnostic_Assertion,
Diagnostic_Assertion,
std::initializer_list<Token_Type> expected_token_types,
Source_Location = Source_Location::current());
void check_tokens_with_errors(
String8_View input, Span<const Diagnostic_Assertion>,
std::initializer_list<Token_Type> expected_token_types, Source_Location);
Tokens_And_Diags lex_to_eof_returning_diags(Padded_String_View);
std::vector<Token> lex_to_eof(Padded_String_View,
Source_Location = Source_Location::current());
std::vector<Token> lex_to_eof(String8_View,
Source_Location = Source_Location::current());
Lexer& make_lexer(Padded_String_View input) {
return this->lexers_.emplace_back(input, &this->memory_);
}
// If true, tell check_tokens_with_errors, lex_to_eof, etc. to call
// Lexer::skip_in_jsx instead of Lexer::skip. This has no effect on the first
// token.
bool lex_jsx_tokens = false;
Monotonic_Allocator memory_{"test"};
private:
Linked_Vector<Lexer> lexers_ = Linked_Vector<Lexer>(new_delete_resource());
};
TEST_F(Test_Lex, lex_block_comments) {
this->check_single_token(u8"/* */ hello"_sv, u8"hello"_sv);
this->check_single_token(u8"/*/ comment */ hi"_sv, u8"hi"_sv);
this->check_single_token(u8"/* comment /*/ hi"_sv, u8"hi"_sv);
this->check_single_token(u8"/* not /* nested */ ident"_sv, u8"ident"_sv);
EXPECT_THAT(this->lex_to_eof(u8"/**/"_sv), IsEmpty());
{
Padded_String input(u8"hello /* unterminated comment "_sv);
auto error = /* */ u8" ^^ Diag_Unclosed_Block_Comment"_diag;
Lexer l(&input, &this->memory_);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::end_of_file);
assert_diagnostics(&input, l.diags(), {error});
}
}
TEST_F(Test_Lex, lex_unopened_block_comment) {
{
Padded_String input(u8"hello */"_sv);
auto error = /* */ u8" ^^ Diag_Unopened_Block_Comment"_diag;
Lexer l(&input, &this->memory_); // identifier
EXPECT_EQ(l.peek().type, Token_Type::identifier);
l.skip(); // end of file
EXPECT_EQ(l.peek().type, Token_Type::end_of_file);
assert_diagnostics(&input, l.diags(), {error});
}
{
Padded_String input(u8"*-----*/"_sv);
auto error = /* */ u8" ^^ Diag_Unopened_Block_Comment"_diag;
Lexer l(&input, &this->memory_);
while (l.peek().type != Token_Type::end_of_file) {
l.skip();
}
EXPECT_EQ(l.peek().type, Token_Type::end_of_file);
assert_diagnostics(&input, l.diags(), {error});
}
{
Padded_String input(u8"*******/"_sv);
auto error = /* */ u8" ^^ Diag_Unopened_Block_Comment"_diag;
Lexer l(&input, &this->memory_);
EXPECT_EQ(l.peek().type, Token_Type::star_star);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::star_star);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::star_star);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::end_of_file);
assert_diagnostics(&input, l.diags(), {error});
}
{
Padded_String input(u8"*/"_sv);
auto error = /* */ u8"^^ Diag_Unopened_Block_Comment"_diag;
Lexer l(&input, &this->memory_);
EXPECT_EQ(l.peek().type, Token_Type::end_of_file);
assert_diagnostics(&input, l.diags(), {error});
}
{
Padded_String input(u8"**/"_sv);
auto error = /* */ u8" ^^ Diag_Unopened_Block_Comment"_diag;
Lexer l(&input, &this->memory_);
EXPECT_EQ(l.peek().type, Token_Type::star);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::end_of_file);
assert_diagnostics(&input, l.diags(), {error});
}
}
TEST_F(Test_Lex, lex_regexp_literal_starting_with_star_slash) {
{
// '/*' is not an end of block comment because it precedes a regexp literal
Padded_String input(u8"*/ hello/"_sv);
Lexer l(&input, &this->memory_);
EXPECT_EQ(l.peek().type, Token_Type::star);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::slash);
l.reparse_as_regexp();
EXPECT_EQ(l.peek().type, Token_Type::regexp);
EXPECT_EQ(l.peek().begin, &input[1]);
EXPECT_EQ(l.peek().end, &input[input.size()]);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::end_of_file);
assert_diagnostics(&input, l.diags(), {});
}
}
TEST_F(Test_Lex, lex_regexp_literal_starting_with_star_star_slash) {
{
Padded_String input(u8"3 **/ banana/"_sv);
Lexer l(&input, &this->memory_);
EXPECT_EQ(l.peek().type, Token_Type::number);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::star_star);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::slash);
l.reparse_as_regexp();
EXPECT_EQ(l.peek().type, Token_Type::regexp);
EXPECT_EQ(l.peek().begin, &input[4]);
EXPECT_EQ(l.peek().end, &input[input.size()]);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::end_of_file);
assert_diagnostics(&input, l.diags(), {});
}
}
TEST_F(Test_Lex, lex_line_comments) {
EXPECT_THAT(this->lex_to_eof(u8"// hello"_sv), IsEmpty());
for (String8_View line_terminator : line_terminators) {
this->check_single_token(
concat(u8"// hello"_sv, line_terminator, u8"world"_sv), u8"world"_sv);
}
EXPECT_THAT(this->lex_to_eof(u8"// hello\n// world"_sv), IsEmpty());
this->check_tokens(u8"hello//*/\n \n \nworld"_sv,
{Token_Type::identifier, Token_Type::identifier});
/**
* Also test for a unicode sign that starts with 0xe280, because the
* skip_line_comment() will also look for U+2028 and U+2029
* > U+2028 Line Separator (0xe280a8)
* > U+2029 Paragraph Separator (0xe280a9)
* > U+2030 Per Mille Sign (0xe280b0)
*/
EXPECT_THAT(this->lex_to_eof(u8"// 123‰"_sv), IsEmpty());
}
TEST_F(Test_Lex, lex_line_comments_with_control_characters) {
for (String8_View control_character :
control_characters_except_line_terminators) {
Padded_String input(
concat(u8"// hello "_sv, control_character, u8" world\n42.0"_sv));
SCOPED_TRACE(input);
this->check_tokens(&input, {Token_Type::number});
}
}
TEST_F(Test_Lex, lex_html_open_comments) {
EXPECT_THAT(this->lex_to_eof(u8"<!-- --> hello"_sv), IsEmpty());
for (String8_View line_terminator : line_terminators) {
this->check_single_token(
concat(u8"<!-- hello"_sv, line_terminator, u8"world"_sv), u8"world"_sv);
}
EXPECT_THAT(this->lex_to_eof(u8"<!-- hello\n<!-- world"_sv), IsEmpty());
EXPECT_THAT(this->lex_to_eof(u8"<!--// hello"_sv), IsEmpty());
this->check_tokens(u8"hello<!--->\n \n \nworld"_sv,
{Token_Type::identifier, Token_Type::identifier});
for (String8_View control_character :
control_characters_except_line_terminators) {
Padded_String input(
concat(u8"<!-- hello "_sv, control_character, u8" world\n42.0"_sv));
SCOPED_TRACE(input);
this->check_tokens(&input, {Token_Type::number});
}
this->check_tokens(u8"hello<!world"_sv,
{Token_Type::identifier, Token_Type::less,
Token_Type::bang, Token_Type::identifier});
this->check_tokens(
u8"hello<!-world"_sv,
{Token_Type::identifier, Token_Type::less, Token_Type::bang,
Token_Type::minus, Token_Type::identifier});
}
TEST_F(Test_Lex, lex_html_close_comments) {
EXPECT_THAT(this->lex_to_eof(u8"--> comment"_sv), IsEmpty());
EXPECT_THAT(this->lex_to_eof(u8" --> comment"_sv), IsEmpty());
EXPECT_THAT(this->lex_to_eof(u8"/* */--> comment"_sv), IsEmpty());
EXPECT_THAT(this->lex_to_eof(u8"/**//**/--> comment"_sv), IsEmpty());
for (String8_View line_terminator : line_terminators) {
String8 eol(line_terminator);
this->check_single_token(concat(u8"-->"_sv, eol, u8"hello"_sv),
u8"hello"_sv);
this->check_single_token(concat(u8"--> comment"_sv, eol, u8"hello"_sv),
u8"hello"_sv);
this->check_single_token(concat(u8"--> comment1"_sv, eol,
u8"--> comment2"_sv, eol, u8"hello"_sv),
u8"hello"_sv);
this->check_single_token(
concat(u8"/*"_sv, eol, u8"*/--> comment"_sv, eol, u8"hello"_sv),
u8"hello"_sv);
this->check_single_token(
concat(u8"/* */ /*"_sv, eol, u8"*/ --> comment"_sv, eol, u8"hello"_sv),
u8"hello"_sv);
this->check_single_token(
concat(u8"/*"_sv, eol, u8"*/ /* */ --> comment"_sv, eol, u8"hello"_sv),
u8"hello"_sv);
}
// Not an HTML close comment because non-whitespace non-comment preceeds.
this->check_tokens(u8"3 --> 4"_sv,
{Token_Type::number, Token_Type::minus_minus,
Token_Type::greater, Token_Type::number});
}
TEST_F(Test_Lex, lex_numbers) {
this->check_tokens(u8"0"_sv, {Token_Type::number});
this->check_tokens(u8"2"_sv, {Token_Type::number});
this->check_tokens(u8"42"_sv, {Token_Type::number});
this->check_tokens(u8"12.34"_sv, {Token_Type::number});
this->check_tokens(u8".34"_sv, {Token_Type::number});
this->check_tokens(u8"1e3"_sv, {Token_Type::number});
this->check_tokens(u8".1e3"_sv, {Token_Type::number});
this->check_tokens(u8"1.e3"_sv, {Token_Type::number});
this->check_tokens(u8"1.0e3"_sv, {Token_Type::number});
this->check_tokens(u8"1e-3"_sv, {Token_Type::number});
this->check_tokens(u8"1e+3"_sv, {Token_Type::number});
this->check_tokens(u8"1E+3"_sv, {Token_Type::number});
this->check_tokens(u8"1E123_233_22"_sv, {Token_Type::number});
this->check_tokens(u8"0n"_sv, {Token_Type::number});
this->check_tokens(u8"123456789n"_sv, {Token_Type::number});
this->check_tokens(u8"123_123_123"_sv, {Token_Type::number});
this->check_tokens(u8"123.123_123"_sv, {Token_Type::number});
this->check_tokens(u8"123. 456"_sv, {Token_Type::number, Token_Type::number});
this->check_tokens(u8"1.2.3"_sv, {Token_Type::number, Token_Type::number});
this->check_tokens(u8".2.3"_sv, {Token_Type::number, Token_Type::number});
this->check_tokens(u8"0.3"_sv, {Token_Type::number});
}
TEST_F(Test_Lex, lex_binary_numbers) {
this->check_tokens(u8"0b0"_sv, {Token_Type::number});
this->check_tokens(u8"0b1"_sv, {Token_Type::number});
this->check_tokens(u8"0b010101010101010"_sv, {Token_Type::number});
this->check_tokens(u8"0B010101010101010"_sv, {Token_Type::number});
this->check_tokens(u8"0b01_11_00_10"_sv, {Token_Type::number});
this->check_tokens(u8"0b01n"_sv, {Token_Type::number});
this->check_tokens(u8"0b0.toString"_sv, {Token_Type::number, Token_Type::dot,
Token_Type::identifier});
this->check_tokens(
u8"0b0101010101.toString"_sv,
{Token_Type::number, Token_Type::dot, Token_Type::identifier});
}
TEST_F(Test_Lex, fail_lex_integer_loses_precision) {
this->check_tokens_with_errors(
u8"9007199254740993"_sv,
u8"^^^^^^^^^^^^^^^^ Diag_Integer_Literal_Will_Lose_Precision.characters"_diag
u8"{.rounded_val=9007199254740992}"_diag,
{Token_Type::number});
this->check_tokens(u8"999999999999999"_sv, {Token_Type::number});
this->check_tokens(
u8"179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368"_sv,
{Token_Type::number});
this->check_tokens_with_errors(
u8"1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"_sv,
u8"^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Diag_Integer_Literal_Will_Lose_Precision.characters"_diag
u8"{.rounded_val=inf}"_diag,
{Token_Type::number});
this->check_tokens_with_errors(
u8"179769313486231580000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"_sv, //
u8"^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Diag_Integer_Literal_Will_Lose_Precision.characters"_diag
u8"{.rounded_val=179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368}"_diag,
{Token_Type::number});
this->check_tokens_with_errors(
u8"179769313486231589999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999"_sv, //
u8"^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Diag_Integer_Literal_Will_Lose_Precision.characters"_diag
u8"{.rounded_val=inf}"_diag,
{Token_Type::number});
this->check_tokens_with_errors(
u8"18014398509481986"_sv, //
u8"^^^^^^^^^^^^^^^^^ Diag_Integer_Literal_Will_Lose_Precision.characters"_diag
u8"{.rounded_val=18014398509481984}"_diag,
{Token_Type::number});
}
TEST_F(Test_Lex, fail_lex_binary_number_no_digits) {
this->check_tokens_with_errors(u8"0b"_sv, //
u8"^^ Diag_No_Digits_In_Binary_Number"_diag,
{Token_Type::number});
this->check_tokens_with_errors(u8"0bn"_sv, //
u8"^^^ Diag_No_Digits_In_Binary_Number"_diag,
{Token_Type::number});
this->check_tokens_with_errors(u8"0b;"_sv, //
u8"^^ Diag_No_Digits_In_Binary_Number"_diag,
{Token_Type::number, Token_Type::semicolon});
this->check_tokens_with_errors(
u8"[0b]"_sv, //
u8" ^^ Diag_No_Digits_In_Binary_Number"_diag,
{Token_Type::left_square, Token_Type::number, Token_Type::right_square});
}
TEST_F(Test_Lex, fail_lex_binary_number) {
this->check_tokens_with_errors(
u8"0b1ee"_sv, //
u8" ^^ Diag_Unexpected_Characters_In_Binary_Number"_diag,
{Token_Type::number});
}
TEST_F(Test_Lex, lex_modern_octal_numbers) {
this->check_tokens(u8"0o51"_sv, {Token_Type::number});
this->check_tokens(u8"0o0"_sv, {Token_Type::number});
this->check_tokens(u8"0O0"_sv, {Token_Type::number});
this->check_tokens(u8"0O12345670"_sv, {Token_Type::number});
this->check_tokens(u8"0o775_775"_sv, {Token_Type::number});
this->check_tokens(u8"0o0n"_sv, {Token_Type::number});
this->check_tokens(u8"0o01"_sv, {Token_Type::number});
this->check_tokens(u8"0o123n"_sv, {Token_Type::number});
}
TEST_F(Test_Lex, fail_lex_modern_octal_number_no_digits) {
this->check_tokens_with_errors(u8"0o"_sv, //
u8"^^ Diag_No_Digits_In_Octal_Number"_diag,
{Token_Type::number});
this->check_tokens_with_errors(u8"0o;"_sv, //
u8"^^ Diag_No_Digits_In_Octal_Number"_diag,
{Token_Type::number, Token_Type::semicolon});
this->check_tokens_with_errors(
u8"[0o]"_sv, //
u8" ^^ Diag_No_Digits_In_Octal_Number"_diag,
{Token_Type::left_square, Token_Type::number, Token_Type::right_square});
}
TEST_F(Test_Lex, fail_lex_modern_octal_numbers) {
this->check_tokens_with_errors(
u8"0o58"_sv, //
u8" ^ Diag_Unexpected_Characters_In_Octal_Number"_diag,
{Token_Type::number});
this->check_tokens_with_errors(
u8"0o58.2"_sv, //
u8" ^^^ Diag_Unexpected_Characters_In_Octal_Number"_diag,
{Token_Type::number});
}
TEST_F(Test_Lex, lex_legacy_octal_numbers_strict) {
this->check_tokens(u8"000"_sv, {Token_Type::number});
this->check_tokens(u8"001"_sv, {Token_Type::number});
this->check_tokens(u8"00010101010101010"_sv, {Token_Type::number});
this->check_tokens(u8"051"_sv, {Token_Type::number});
// Legacy octal number literals which ended up actually being octal support
// method calls with '.'.
this->check_tokens(u8"0123.toString"_sv, {Token_Type::number, Token_Type::dot,
Token_Type::identifier});
this->check_tokens(u8"00.toString"_sv, {Token_Type::number, Token_Type::dot,
Token_Type::identifier});
}
TEST_F(Test_Lex, lex_legacy_octal_numbers_lax) {
this->check_tokens(u8"058"_sv, {Token_Type::number});
this->check_tokens(u8"058.9"_sv, {Token_Type::number});
this->check_tokens(u8"08"_sv, {Token_Type::number});
}
TEST_F(Test_Lex, fail_lex_legacy_octal_numbers) {
this->check_tokens_with_errors(
u8"0123n"_sv, //
u8" ^ Diag_Legacy_Octal_Literal_May_Not_Be_Big_Int"_diag,
{Token_Type::number});
this->check_tokens_with_errors(
u8"052.2"_sv, //
u8" ^ Diag_Octal_Literal_May_Not_Have_Decimal"_diag,
{Token_Type::number});
}
// TODO (#73) (when strict mode implemented) legacy octal number
// literal tests to fail in strict mode
TEST_F(Test_Lex, legacy_octal_numbers_cannot_contain_underscores) {
this->check_tokens_with_errors(
u8"0775_775"_sv, //
u8" ^ Diag_Legacy_Octal_Literal_May_Not_Contain_Underscores"_diag,
{Token_Type::number});
this->check_tokens_with_errors(
u8"0775____775"_sv, //
u8" ^^^^ Diag_Legacy_Octal_Literal_May_Not_Contain_Underscores"_diag,
{Token_Type::number});
}
TEST_F(Test_Lex, lex_hex_numbers) {
this->check_tokens(u8"0x0"_sv, {Token_Type::number});
this->check_tokens(u8"0x123456789abcdef"_sv, {Token_Type::number});
this->check_tokens(u8"0X123456789ABCDEF"_sv, {Token_Type::number});
this->check_tokens(u8"0X123_4567_89AB_CDEF"_sv, {Token_Type::number});
this->check_tokens(u8"0x1n"_sv, {Token_Type::number});
this->check_tokens(u8"0xfn"_sv, {Token_Type::number});
this->check_tokens(u8"0x0.toString"_sv, {Token_Type::number, Token_Type::dot,
Token_Type::identifier});
this->check_tokens(u8"0xe.toString"_sv, {Token_Type::number, Token_Type::dot,
Token_Type::identifier});
}
TEST_F(Test_Lex, fail_lex_hex_number_no_digits) {
this->check_tokens_with_errors(u8"0x"_sv, //
u8"^^ Diag_No_Digits_In_Hex_Number"_diag,
{Token_Type::number});
this->check_tokens_with_errors(u8"0xn"_sv, //
u8"^^^ Diag_No_Digits_In_Hex_Number"_diag,
{Token_Type::number});
this->check_tokens_with_errors(u8"0x;"_sv, //
u8"^^ Diag_No_Digits_In_Hex_Number"_diag,
{Token_Type::number, Token_Type::semicolon});
this->check_tokens_with_errors(
u8"[0x]"_sv, //
u8" ^^ Diag_No_Digits_In_Hex_Number"_diag,
{Token_Type::left_square, Token_Type::number, Token_Type::right_square});
}
TEST_F(Test_Lex, fail_lex_hex_number) {
this->check_tokens_with_errors(
u8"0xfqqn"_sv, //
u8" ^^^ Diag_Unexpected_Characters_In_Hex_Number"_diag,
{Token_Type::number});
}
TEST_F(Test_Lex, lex_number_with_trailing_garbage) {
this->check_tokens_with_errors(
u8"123abcd"_sv, //
u8" ^^^^ Diag_Unexpected_Characters_In_Number"_diag,
{Token_Type::number});
this->check_tokens_with_errors(
u8"123e f"_sv, //
u8" ^ Diag_Unexpected_Characters_In_Number"_diag,
{Token_Type::number, Token_Type::identifier});
this->check_tokens_with_errors(
u8"123e-f"_sv, //
u8" ^ Diag_Unexpected_Characters_In_Number"_diag,
{Token_Type::number, Token_Type::minus, Token_Type::identifier});
this->check_tokens_with_errors(
u8"0b01234"_sv, //
u8" ^^^ Diag_Unexpected_Characters_In_Binary_Number"_diag,
{Token_Type::number});
this->check_tokens_with_errors(
u8"0b0h0lla"_sv, //
u8" ^^^^^ Diag_Unexpected_Characters_In_Binary_Number"_diag,
{Token_Type::number});
this->check_tokens_with_errors(
u8"0xabjjw"_sv, //
u8" ^^^ Diag_Unexpected_Characters_In_Hex_Number"_diag,
{Token_Type::number});
this->check_tokens_with_errors(
u8"0o69"_sv, //
u8" ^ Diag_Unexpected_Characters_In_Octal_Number"_diag,
{Token_Type::number});
}
TEST_F(Test_Lex, lex_decimal_number_with_dot_method_call_is_invalid) {
// TODO(strager): Perhaps a better diagnostic would suggest adding parentheses
// or another '.' to make a valid method call.
this->check_tokens_with_errors(
u8"0.toString()"_sv, //
u8" ^^^^^^^^ Diag_Unexpected_Characters_In_Number"_diag,
{Token_Type::number, Token_Type::left_paren, Token_Type::right_paren});
this->check_tokens_with_errors(
u8"09.toString"_sv, //
u8" ^^^^^^^^ Diag_Unexpected_Characters_In_Number"_diag,
{Token_Type::number});
// NOTE(strager): Other numbers with leading zeroes, like '00' and '012345',
// are legacy octal literals and *can* have a dot method call.
}
TEST_F(Test_Lex, lex_invalid_big_int_number) {
this->check_tokens_with_errors(
u8"12.34n"_sv, //
u8"^^^^^^ Diag_Big_Int_Literal_Contains_Decimal_Point"_diag,
{Token_Type::number});
this->check_tokens_with_errors(
u8"1e3n"_sv, //
u8"^^^^ Diag_Big_Int_Literal_Contains_Exponent"_diag,
{Token_Type::number});
// Only complain about the decimal point, not the leading 0 digit.
this->check_tokens_with_errors(
u8"0.1n"_sv, //
u8"^^^^ Diag_Big_Int_Literal_Contains_Decimal_Point"_diag,
{Token_Type::number});
// Complain about both the decimal point and the leading 0 digit.
this->check_tokens_with_errors(
u8"01.2n"_sv, //
u8" ^ Diag_Octal_Literal_May_Not_Have_Decimal"_diag,
u8" ^^^ Diag_Legacy_Octal_Literal_May_Not_Be_Big_Int"_diag,
{Token_Type::number});
// Complain about everything. What a disaster.
this->check_tokens_with_errors(
u8"01.2e+3n"_sv, //
u8" ^ Diag_Octal_Literal_May_Not_Have_Decimal"_diag,
u8" ^^^^ Diag_Octal_Literal_May_Not_Have_Exponent"_diag,
u8" ^^^^^^ Diag_Legacy_Octal_Literal_May_Not_Be_Big_Int"_diag,
{Token_Type::number});
}
TEST_F(Test_Lex, lex_number_with_double_underscore) {
this->check_tokens_with_errors(
u8"123__000"_sv, //
u8" ^^ Diag_Number_Literal_Contains_Consecutive_Underscores"_diag,
{Token_Type::number});
}
TEST_F(Test_Lex, lex_number_with_many_underscores) {
this->check_tokens_with_errors(
u8"123_____000"_sv, //
u8" ^^^^^ Diag_Number_Literal_Contains_Consecutive_Underscores"_diag,
{Token_Type::number});
this->check_tokens_with_errors(
u8"0xfee_____eed"_sv, //
u8" ^^^^^ Diag_Number_Literal_Contains_Consecutive_Underscores"_diag,
{Token_Type::number});
this->check_tokens_with_errors(
u8"0o777_____000"_sv, //
u8" ^^^^^ Diag_Number_Literal_Contains_Consecutive_Underscores"_diag,
{Token_Type::number});
this->check_tokens_with_errors(
u8"0b111_____000"_sv, //
u8" ^^^^^ Diag_Number_Literal_Contains_Consecutive_Underscores"_diag,
{Token_Type::number});
}
TEST_F(Test_Lex, lex_number_with_multiple_groups_of_consecutive_underscores) {
{
// clang-format off
Padded_String input(u8"123__45___6"_sv);
auto error1 = /* */ u8" ^^^ Diag_Number_Literal_Contains_Consecutive_Underscores"_diag;
auto error0 = /* */ u8" ^^ Diag_Number_Literal_Contains_Consecutive_Underscores"_diag;
// clang-format on
Lexer l(&input, &this->memory_);
EXPECT_EQ(l.peek().type, Token_Type::number);
EXPECT_EQ(*l.peek().begin, '1');
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::end_of_file);
assert_diagnostics(&input, l.diags(), {error0, error1});
}
}
TEST_F(Test_Lex, lex_number_with_trailing_underscore) {
this->check_tokens_with_errors(
u8"123456_"_sv, //
u8" ^ Diag_Number_Literal_Contains_Trailing_Underscores"_diag,
{Token_Type::number});
}
TEST_F(Test_Lex, lex_number_with_trailing_underscores) {
this->check_tokens_with_errors(
u8"123456___"_sv, //
u8" ^^^ Diag_Number_Literal_Contains_Trailing_Underscores"_diag,
{Token_Type::number});
}
TEST_F(Test_Lex, lex_strings) {
this->check_tokens(u8R"('hello')"_sv, {Token_Type::string});
this->check_tokens(u8R"("hello")"_sv, {Token_Type::string});
this->check_tokens(u8R"("hello\"world")"_sv, {Token_Type::string});
this->check_tokens(u8R"('hello\'world')"_sv, {Token_Type::string});
this->check_tokens(u8R"('hello"world')"_sv, {Token_Type::string});
this->check_tokens(u8R"("hello'world")"_sv, {Token_Type::string});
this->check_tokens(u8"'hello\\\nworld'"_sv, {Token_Type::string});
this->check_tokens(u8"\"hello\\\nworld\""_sv, {Token_Type::string});
this->check_tokens(u8"'hello\\x0aworld'"_sv, {Token_Type::string});
this->check_tokens(u8R"('\x68\x65\x6c\x6C\x6f')"_sv, {Token_Type::string});
this->check_tokens(u8R"('\uabcd')"_sv, {Token_Type::string});
this->check_tokens(u8R"('\u{abcd}')"_sv, {Token_Type::string});
this->check_tokens_with_errors(
u8"\"unterminated"_sv, //
u8"^^^^^^^^^^^^^^ Diag_Unclosed_String_Literal"_diag,
{Token_Type::string});
for (String8_View line_terminator : line_terminators) {
for (String8_View quotation_mark : {u8"'"_sv, u8"\""_sv}) {
Padded_String input(concat(quotation_mark, u8"line1\\"_sv,
line_terminator, u8"line2"_sv,
quotation_mark));
this->check_tokens(&input, {Token_Type::string});
}
}
for (String8_View line_terminator : line_terminators_except_ls_ps) {
Padded_String input(
concat(u8"'unterminated"_sv, line_terminator, u8"hello"_sv));
Lexer l(&input, &this->memory_);
EXPECT_EQ(l.peek().type, Token_Type::string);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::identifier);
EXPECT_EQ(l.peek().identifier_name().normalized_name(), u8"hello"_sv);
assert_diagnostics(&input, l.diags(),
{
// 'unterminated\nhello
u8"^^^^^^^^^^^^^ Diag_Unclosed_String_Literal"_diag,
});
}
for (String8_View line_terminator : line_terminators_except_ls_ps) {
Padded_String input(
concat(u8"'separated"_sv, line_terminator, u8"hello'"_sv));
Lexer l(&input, &this->memory_);
EXPECT_EQ(l.peek().type, Token_Type::string);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::end_of_file);
assert_diagnostics(
&input, l.diags(),
{
DIAGNOSTIC_ASSERTION_SPAN(Diag_Unclosed_String_Literal, //
string_literal, 0, input),
});
}
for (String8_View line_terminator : line_terminators_except_ls_ps) {
Padded_String input(concat(u8"'separated"_sv, line_terminator,
line_terminator, u8"hello'"_sv));
Lexer l(&input, &this->memory_);
EXPECT_EQ(l.peek().type, Token_Type::string);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::identifier);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::string);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::end_of_file);
assert_diagnostics(
&input, l.diags(),
{
DIAGNOSTIC_ASSERTION_SPAN(Diag_Unclosed_String_Literal, //
string_literal, 0, u8"'separated"_sv),
DIAGNOSTIC_ASSERTION_SPAN(Diag_Unclosed_String_Literal, //
string_literal,
u8"'separated"_sv.size() +
2 * line_terminator.size() +
u8"hello"_sv.size(),
u8"'"_sv),
});
}
for (String8_View line_terminator : line_terminators_except_ls_ps) {
Padded_String input(
concat(u8"let x = 'hello"_sv, line_terminator, u8"let y = 'world'"_sv));
Lexer l(&input, &this->memory_);
EXPECT_EQ(l.peek().type, Token_Type::kw_let);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::identifier);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::equal);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::string);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::kw_let);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::identifier);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::equal);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::string);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::end_of_file);
assert_diagnostics(&input, l.diags(),
{
// let x = 'hello\nlet y = 'world'
u8" ^^^^^^ Diag_Unclosed_String_Literal"_diag,
});
}
this->check_tokens_with_errors(
u8"'unterminated\\"_sv, //
u8"^^^^^^^^^^^^^^^ Diag_Unclosed_String_Literal"_diag,
{Token_Type::string});
this->check_tokens_with_errors(
u8"'\\x"_sv, //
u8" ^^^ Diag_Invalid_Hex_Escape_Sequence"_diag, //
u8"^^^^ Diag_Unclosed_String_Literal"_diag, {Token_Type::string});
this->check_tokens_with_errors(
u8"'\\x1"_sv, //
u8" ^^^ Diag_Invalid_Hex_Escape_Sequence"_diag, //
u8"^^^^^ Diag_Unclosed_String_Literal"_diag, {Token_Type::string});
this->check_tokens_with_errors(u8"'\\x'"_sv, //
u8" ^^^ Diag_Invalid_Hex_Escape_Sequence"_diag,
{Token_Type::string});
this->check_tokens_with_errors(
u8"'\\x\\xyz'"_sv, //
u8" ^^^ Diag_Invalid_Hex_Escape_Sequence"_diag, //
u8" ^^^ Diag_Invalid_Hex_Escape_Sequence"_diag, {Token_Type::string});
this->check_tokens_with_errors(
u8"'\\x1 \\xff \\xg '"_sv, //
u8" ^^^ Diag_Invalid_Hex_Escape_Sequence"_diag, //
u8" ^^^ Diag_Invalid_Hex_Escape_Sequence"_diag, {Token_Type::string});
this->check_tokens_with_errors(
u8"'hello\\u'"_sv, //
u8" ^^^^ Diag_Expected_Hex_Digits_In_Unicode_Escape"_diag,
{Token_Type::string});
this->check_tokens_with_errors(
u8"'hello\\u{110000}'"_sv, //
u8" ^^^^^^^^^^^ Diag_Escaped_Code_Point_In_Unicode_Out_Of_Range"_diag,
{Token_Type::string});
// TODO(#187): Report octal escape sequences in strict mode.
// TODO(#187): Report invalid octal escape sequences in non-strict mode.
}
TEST_F(Test_Lex, lex_string_with_ascii_control_characters) {
for (String8_View control_character :
concat(control_characters_except_line_terminators, ls_and_ps)) {
Padded_String input(
concat(u8"'hello"_sv, control_character, u8"world'"_sv));
SCOPED_TRACE(input);
this->check_tokens(&input, {Token_Type::string});
}
for (String8_View control_character :
control_characters_except_line_terminators) {
Padded_String input(
concat(u8"'hello\\"_sv, control_character, u8"world'"_sv));
SCOPED_TRACE(input);
this->check_tokens(&input, {Token_Type::string});
}
}
TEST_F(Test_Lex, string_with_curly_quotes) {
// Curly single quotes:
this->check_tokens_with_errors(
u8"\u2018string here\u2019"_sv, //
u8"^^^^^^ Diag_Invalid_Quotes_Around_String_Literal.opening_quote{.suggested_quote='}"_diag,
{Token_Type::string});
this->check_tokens_with_errors(
u8"\u2019string here\u2018"_sv, //
u8"^^^^^^ Diag_Invalid_Quotes_Around_String_Literal.opening_quote{.suggested_quote='}"_diag,
{Token_Type::string});
this->check_tokens_with_errors(
u8"\u2018string \u201c \" \u201d here\u2019"_sv, //
u8"^^^^^^ Diag_Invalid_Quotes_Around_String_Literal.opening_quote{.suggested_quote='}"_diag,
{Token_Type::string});
// Curly double quotes:
this->check_tokens_with_errors(
u8"\u201cstring here\u201d"_sv, //
u8"^^^^^^ Diag_Invalid_Quotes_Around_String_Literal.opening_quote{.suggested_quote=\"}"_diag,
{Token_Type::string});
this->check_tokens_with_errors(
u8"\u201dstring here\u201c"_sv, //
u8"^^^^^^ Diag_Invalid_Quotes_Around_String_Literal.opening_quote{.suggested_quote=\"}"_diag,
{Token_Type::string});
this->check_tokens_with_errors(
u8"\u201cstring \u2018 ' \u2019 here\u201d"_sv, //
u8"^^^^^^ Diag_Invalid_Quotes_Around_String_Literal.opening_quote{.suggested_quote=\"}"_diag,
{Token_Type::string});
// Start with curly quote, but end with matching straight quote:
this->check_tokens_with_errors(
u8"\u2018string here'"_sv, //
u8"^^^^^^ Diag_Invalid_Quotes_Around_String_Literal.opening_quote{.suggested_quote='}"_diag,
{Token_Type::string});
this->check_tokens_with_errors(
u8"\u201cstring here\""_sv, //
u8"^^^^^^ Diag_Invalid_Quotes_Around_String_Literal.opening_quote{.suggested_quote=\"}"_diag,
{Token_Type::string});
// Unclosed string:
for (String8 opening_quote : {u8"\u2018", u8"\u201c"}) {
this->check_tokens_with_errors(
opening_quote + u8"string here", //
// \u2018string here
u8"^^^^^^^^^^^^^^^^^ Diag_Unclosed_String_Literal"_diag,
u8"^^^^^^ Diag_Invalid_Quotes_Around_String_Literal.opening_quote"_diag,
{Token_Type::string});
for (String8_View line_terminator : line_terminators) {
this->check_tokens_with_errors(
opening_quote + u8"string here" + String8(line_terminator) +
u8"next_line", //
// \u2018string here\nnext_line
u8"^^^^^^^^^^^^^^^^^ Diag_Unclosed_String_Literal"_diag,
u8"^^^^^^ Diag_Invalid_Quotes_Around_String_Literal.opening_quote"_diag,
{Token_Type::string, Token_Type::identifier});
}
}
}
TEST_F(Test_Lex, lex_templates) {
this->check_tokens(u8"``"_sv, {Token_Type::complete_template});
this->check_tokens(u8"`hello`"_sv, {Token_Type::complete_template});
this->check_tokens(u8"`hello$world`"_sv, {Token_Type::complete_template});
this->check_tokens(u8"`hello{world`"_sv, {Token_Type::complete_template});
this->check_tokens(u8R"(`hello\`world`)"_sv, {Token_Type::complete_template});
this->check_tokens(u8R"(`hello$\{world`)"_sv,
{Token_Type::complete_template});
this->check_tokens(u8R"(`hello\${world`)"_sv,
{Token_Type::complete_template});
this->check_tokens(
u8R"(`hello
world`)"_sv,
{Token_Type::complete_template});
this->check_tokens(u8"`hello\\\nworld`"_sv, {Token_Type::complete_template});
this->check_tokens(u8R"(`\uabcd`)"_sv, {Token_Type::complete_template});
this->check_tokens(u8R"(`\u{abcd}`)"_sv, {Token_Type::complete_template});
{
Padded_String code(u8"`hello${42}`"_sv);
Lexer l(&code, &this->memory_);
EXPECT_EQ(l.peek().type, Token_Type::incomplete_template);
EXPECT_EQ(l.peek().span().string_view(), u8"`hello${"_sv);
const Char8* template_begin = l.peek().begin;
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::number);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::right_curly);
l.skip_in_template(template_begin);
EXPECT_EQ(l.peek().type, Token_Type::complete_template);
EXPECT_EQ(l.peek().span().string_view(), u8"`"_sv);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::end_of_file);
}
{
Padded_String code(u8"`${42}world`"_sv);
Lexer l(&code, &this->memory_);
EXPECT_EQ(l.peek().type, Token_Type::incomplete_template);
EXPECT_EQ(l.peek().span().string_view(), u8"`${"_sv);
const Char8* template_begin = l.peek().begin;
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::number);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::right_curly);
l.skip_in_template(template_begin);
EXPECT_EQ(l.peek().type, Token_Type::complete_template);
EXPECT_EQ(l.peek().span().string_view(), u8"world`"_sv);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::end_of_file);
}
{
Padded_String code(u8"`${left}${right}`"_sv);
Lexer l(&code, &this->memory_);
EXPECT_EQ(l.peek().type, Token_Type::incomplete_template);
const Char8* template_begin = l.peek().begin;
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::identifier);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::right_curly);
l.skip_in_template(template_begin);
EXPECT_EQ(l.peek().type, Token_Type::incomplete_template);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::identifier);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::right_curly);
l.skip_in_template(template_begin);
EXPECT_EQ(l.peek().type, Token_Type::complete_template);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::end_of_file);
}
this->check_tokens_with_errors(u8"`unterminated"_sv, //
u8"^^^^^^^^^^^^^ Diag_Unclosed_Template"_diag,
{Token_Type::complete_template});
{
Padded_String input(u8"`${un}terminated"_sv);
auto error = /* */ u8"^^^^^^^^^^^^^^^^ Diag_Unclosed_Template"_diag;
Lexer l(&input, &this->memory_);
EXPECT_EQ(l.peek().type, Token_Type::incomplete_template);
const Char8* template_begin = l.peek().begin;
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::identifier);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::right_curly);
l.skip_in_template(template_begin);
EXPECT_EQ(l.peek().type, Token_Type::complete_template);
l.skip();
EXPECT_EQ(l.peek().type, Token_Type::end_of_file);
assert_diagnostics(&input, l.diags(), {error});
}
this->check_tokens_with_errors(
u8"`unterminated\\"_sv, //
u8"^^^^^^^^^^^^^^^ Diag_Unclosed_Template"_diag,
{Token_Type::complete_template});
}