Do the same single file consolidation on tests

1 files changed, 0 insertions, 932 deletions

diff --git a/tests/unit/driver/lexer/lexer_test.go b/tests/unit/driver/lexer/lexer_test.go
deleted file mode 100644
index a3d0231..0000000
--- a/tests/unit/driver/lexer/lexer_test.go
+++ /dev/null
@@ -1,932 +0,0 @@
-package lexer
-
-import (
-	"bytes"
-	"fmt"
-	"strings"
-	"testing"
-
-	"urubu/grammar/lexical"
-	spec "urubu/spec/grammar"
-)
-
-func newLexEntry(modes []string, kind string, pattern string, push string, pop bool) *lexical.LexEntry {
-	ms := []spec.LexModeName{}
-	for _, m := range modes {
-		ms = append(ms, spec.LexModeName(m))
-	}
-	return &lexical.LexEntry{
-		Kind:    spec.LexKindName(kind),
-		Pattern: pattern,
-		Modes:   ms,
-		Push:    spec.LexModeName(push),
-		Pop:     pop,
-	}
-}
-
-func newLexEntryDefaultNOP(kind string, pattern string) *lexical.LexEntry {
-	return &lexical.LexEntry{
-		Kind:    spec.LexKindName(kind),
-		Pattern: pattern,
-		Modes: []spec.LexModeName{
-			spec.LexModeNameDefault,
-		},
-	}
-}
-
-func newLexEntryFragment(kind string, pattern string) *lexical.LexEntry {
-	return &lexical.LexEntry{
-		Kind:     spec.LexKindName(kind),
-		Pattern:  pattern,
-		Fragment: true,
-	}
-}
-
-func newToken(modeID ModeID, kindID KindID, modeKindID ModeKindID, lexeme []byte) *Token {
-	return &Token{
-		ModeID:     modeID,
-		KindID:     kindID,
-		ModeKindID: modeKindID,
-		Lexeme:     lexeme,
-	}
-}
-
-func newTokenDefault(kindID int, modeKindID int, lexeme []byte) *Token {
-	return newToken(
-		ModeID(spec.LexModeIDDefault.Int()),
-		KindID(spec.LexKindID(kindID).Int()),
-		ModeKindID(spec.LexModeKindID(modeKindID).Int()),
-		lexeme,
-	)
-}
-
-func newEOFToken(modeID ModeID, modeName string) *Token {
-	return &Token{
-		ModeID:     modeID,
-		ModeKindID: 0,
-		EOF:        true,
-	}
-}
-
-func newEOFTokenDefault() *Token {
-	return newEOFToken(ModeID(spec.LexModeIDDefault.Int()), spec.LexModeNameDefault.String())
-}
-
-func newInvalidTokenDefault(lexeme []byte) *Token {
-	return &Token{
-		ModeID:     ModeID(spec.LexModeIDDefault.Int()),
-		ModeKindID: 0,
-		Lexeme:     lexeme,
-		Invalid:    true,
-	}
-}
-
-func withPos(tok *Token, bytePos int, byteLen int, row int, col int) *Token {
-	tok.BytePos = bytePos
-	tok.ByteLen = byteLen
-	tok.Row = row
-	tok.Col = col
-	return tok
-}
-
-func TestLexer_Next(t *testing.T) {
-	test := []struct {
-		lspec           *lexical.LexSpec
-		src             string
-		tokens          []*Token
-		passiveModeTran bool
-		tran            func(l *Lexer, tok *Token) error
-	}{
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					newLexEntryDefaultNOP("t1", "(a|b)*abb"),
-					newLexEntryDefaultNOP("t2", " +"),
-				},
-			},
-			src: "abb aabb aaabb babb bbabb abbbabb",
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte("abb")), 0, 3, 0, 0),
-				withPos(newTokenDefault(2, 2, []byte(" ")), 3, 1, 0, 3),
-				withPos(newTokenDefault(1, 1, []byte("aabb")), 4, 4, 0, 4),
-				withPos(newTokenDefault(2, 2, []byte(" ")), 8, 1, 0, 8),
-				withPos(newTokenDefault(1, 1, []byte("aaabb")), 9, 5, 0, 9),
-				withPos(newTokenDefault(2, 2, []byte(" ")), 14, 1, 0, 14),
-				withPos(newTokenDefault(1, 1, []byte("babb")), 15, 4, 0, 15),
-				withPos(newTokenDefault(2, 2, []byte(" ")), 19, 1, 0, 19),
-				withPos(newTokenDefault(1, 1, []byte("bbabb")), 20, 5, 0, 20),
-				withPos(newTokenDefault(2, 2, []byte(" ")), 25, 1, 0, 25),
-				withPos(newTokenDefault(1, 1, []byte("abbbabb")), 26, 7, 0, 26),
-				withPos(newEOFTokenDefault(), 33, 0, 0, 33),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					newLexEntryDefaultNOP("t1", "b?a+"),
-					newLexEntryDefaultNOP("t2", "(ab)?(cd)+"),
-					newLexEntryDefaultNOP("t3", " +"),
-				},
-			},
-			src: "ba baaa a aaa abcd abcdcdcd cd cdcdcd",
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte("ba")), 0, 2, 0, 0),
-				withPos(newTokenDefault(3, 3, []byte(" ")), 2, 1, 0, 2),
-				withPos(newTokenDefault(1, 1, []byte("baaa")), 3, 4, 0, 3),
-				withPos(newTokenDefault(3, 3, []byte(" ")), 7, 1, 0, 7),
-				withPos(newTokenDefault(1, 1, []byte("a")), 8, 1, 0, 8),
-				withPos(newTokenDefault(3, 3, []byte(" ")), 9, 1, 0, 9),
-				withPos(newTokenDefault(1, 1, []byte("aaa")), 10, 3, 0, 10),
-				withPos(newTokenDefault(3, 3, []byte(" ")), 13, 1, 0, 13),
-				withPos(newTokenDefault(2, 2, []byte("abcd")), 14, 4, 0, 14),
-				withPos(newTokenDefault(3, 3, []byte(" ")), 18, 1, 0, 18),
-				withPos(newTokenDefault(2, 2, []byte("abcdcdcd")), 19, 8, 0, 19),
-				withPos(newTokenDefault(3, 3, []byte(" ")), 27, 1, 0, 27),
-				withPos(newTokenDefault(2, 2, []byte("cd")), 28, 2, 0, 28),
-				withPos(newTokenDefault(3, 3, []byte(" ")), 30, 1, 0, 30),
-				withPos(newTokenDefault(2, 2, []byte("cdcdcd")), 31, 6, 0, 31),
-				withPos(newEOFTokenDefault(), 37, 0, 0, 37),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					newLexEntryDefaultNOP("t1", "."),
-				},
-			},
-			src: string([]byte{
-				0x00,
-				0x7f,
-				0xc2, 0x80,
-				0xdf, 0xbf,
-				0xe1, 0x80, 0x80,
-				0xec, 0xbf, 0xbf,
-				0xed, 0x80, 0x80,
-				0xed, 0x9f, 0xbf,
-				0xee, 0x80, 0x80,
-				0xef, 0xbf, 0xbf,
-				0xf0, 0x90, 0x80, 0x80,
-				0xf0, 0xbf, 0xbf, 0xbf,
-				0xf1, 0x80, 0x80, 0x80,
-				0xf3, 0xbf, 0xbf, 0xbf,
-				0xf4, 0x80, 0x80, 0x80,
-				0xf4, 0x8f, 0xbf, 0xbf,
-			}),
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte{0x00}), 0, 1, 0, 0),
-				withPos(newTokenDefault(1, 1, []byte{0x7f}), 1, 1, 0, 1),
-				withPos(newTokenDefault(1, 1, []byte{0xc2, 0x80}), 2, 2, 0, 2),
-				withPos(newTokenDefault(1, 1, []byte{0xdf, 0xbf}), 4, 2, 0, 3),
-				withPos(newTokenDefault(1, 1, []byte{0xe1, 0x80, 0x80}), 6, 3, 0, 4),
-				withPos(newTokenDefault(1, 1, []byte{0xec, 0xbf, 0xbf}), 9, 3, 0, 5),
-				withPos(newTokenDefault(1, 1, []byte{0xed, 0x80, 0x80}), 12, 3, 0, 6),
-				withPos(newTokenDefault(1, 1, []byte{0xed, 0x9f, 0xbf}), 15, 3, 0, 7),
-				withPos(newTokenDefault(1, 1, []byte{0xee, 0x80, 0x80}), 18, 3, 0, 8),
-				withPos(newTokenDefault(1, 1, []byte{0xef, 0xbf, 0xbf}), 21, 3, 0, 9),
-				withPos(newTokenDefault(1, 1, []byte{0xf0, 0x90, 0x80, 0x80}), 24, 4, 0, 10),
-				withPos(newTokenDefault(1, 1, []byte{0xf0, 0xbf, 0xbf, 0xbf}), 28, 4, 0, 11),
-				withPos(newTokenDefault(1, 1, []byte{0xf1, 0x80, 0x80, 0x80}), 32, 4, 0, 12),
-				withPos(newTokenDefault(1, 1, []byte{0xf3, 0xbf, 0xbf, 0xbf}), 36, 4, 0, 13),
-				withPos(newTokenDefault(1, 1, []byte{0xf4, 0x80, 0x80, 0x80}), 40, 4, 0, 14),
-				withPos(newTokenDefault(1, 1, []byte{0xf4, 0x8f, 0xbf, 0xbf}), 44, 4, 0, 15),
-				withPos(newEOFTokenDefault(), 48, 0, 0, 16),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					newLexEntryDefaultNOP("t1", "[ab.*+?|()[\\]]"),
-				},
-			},
-			src: "ab.*+?|()[]",
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte("a")), 0, 1, 0, 0),
-				withPos(newTokenDefault(1, 1, []byte("b")), 1, 1, 0, 1),
-				withPos(newTokenDefault(1, 1, []byte(".")), 2, 1, 0, 2),
-				withPos(newTokenDefault(1, 1, []byte("*")), 3, 1, 0, 3),
-				withPos(newTokenDefault(1, 1, []byte("+")), 4, 1, 0, 4),
-				withPos(newTokenDefault(1, 1, []byte("?")), 5, 1, 0, 5),
-				withPos(newTokenDefault(1, 1, []byte("|")), 6, 1, 0, 6),
-				withPos(newTokenDefault(1, 1, []byte("(")), 7, 1, 0, 7),
-				withPos(newTokenDefault(1, 1, []byte(")")), 8, 1, 0, 8),
-				withPos(newTokenDefault(1, 1, []byte("[")), 9, 1, 0, 9),
-				withPos(newTokenDefault(1, 1, []byte("]")), 10, 1, 0, 10),
-				withPos(newEOFTokenDefault(), 11, 0, 0, 11),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					// all 1 byte characters except null character (U+0000)
-					//
-					// NOTE:
-					// vartan cannot handle the null character in patterns because lexical.lexer,
-					// specifically read() and restore(), recognizes the null characters as that a symbol doesn't exist.
-					// If a pattern needs a null character, use code point expression \u{0000}.
-					newLexEntryDefaultNOP("char_1_byte", "[\x01-\x7f]"),
-				},
-			},
-			src: string([]byte{
-				0x01,
-				0x02,
-				0x7e,
-				0x7f,
-			}),
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte{0x01}), 0, 1, 0, 0),
-				withPos(newTokenDefault(1, 1, []byte{0x02}), 1, 1, 0, 1),
-				withPos(newTokenDefault(1, 1, []byte{0x7e}), 2, 1, 0, 2),
-				withPos(newTokenDefault(1, 1, []byte{0x7f}), 3, 1, 0, 3),
-				withPos(newEOFTokenDefault(), 4, 0, 0, 4),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					// all 2 byte characters
-					newLexEntryDefaultNOP("char_2_byte", "[\xc2\x80-\xdf\xbf]"),
-				},
-			},
-			src: string([]byte{
-				0xc2, 0x80,
-				0xc2, 0x81,
-				0xdf, 0xbe,
-				0xdf, 0xbf,
-			}),
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte{0xc2, 0x80}), 0, 2, 0, 0),
-				withPos(newTokenDefault(1, 1, []byte{0xc2, 0x81}), 2, 2, 0, 1),
-				withPos(newTokenDefault(1, 1, []byte{0xdf, 0xbe}), 4, 2, 0, 2),
-				withPos(newTokenDefault(1, 1, []byte{0xdf, 0xbf}), 6, 2, 0, 3),
-				withPos(newEOFTokenDefault(), 8, 0, 0, 4),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					// All bytes are the same.
-					newLexEntryDefaultNOP("char_3_byte", "[\xe0\xa0\x80-\xe0\xa0\x80]"),
-				},
-			},
-			src: string([]byte{
-				0xe0, 0xa0, 0x80,
-			}),
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte{0xe0, 0xa0, 0x80}), 0, 3, 0, 0),
-				withPos(newEOFTokenDefault(), 3, 0, 0, 1),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					// The first two bytes are the same.
-					newLexEntryDefaultNOP("char_3_byte", "[\xe0\xa0\x80-\xe0\xa0\xbf]"),
-				},
-			},
-			src: string([]byte{
-				0xe0, 0xa0, 0x80,
-				0xe0, 0xa0, 0x81,
-				0xe0, 0xa0, 0xbe,
-				0xe0, 0xa0, 0xbf,
-			}),
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte{0xe0, 0xa0, 0x80}), 0, 3, 0, 0),
-				withPos(newTokenDefault(1, 1, []byte{0xe0, 0xa0, 0x81}), 3, 3, 0, 1),
-				withPos(newTokenDefault(1, 1, []byte{0xe0, 0xa0, 0xbe}), 6, 3, 0, 2),
-				withPos(newTokenDefault(1, 1, []byte{0xe0, 0xa0, 0xbf}), 9, 3, 0, 3),
-				withPos(newEOFTokenDefault(), 12, 0, 0, 4),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					// The first byte are the same.
-					newLexEntryDefaultNOP("char_3_byte", "[\xe0\xa0\x80-\xe0\xbf\xbf]"),
-				},
-			},
-			src: string([]byte{
-				0xe0, 0xa0, 0x80,
-				0xe0, 0xa0, 0x81,
-				0xe0, 0xbf, 0xbe,
-				0xe0, 0xbf, 0xbf,
-			}),
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte{0xe0, 0xa0, 0x80}), 0, 3, 0, 0),
-				withPos(newTokenDefault(1, 1, []byte{0xe0, 0xa0, 0x81}), 3, 3, 0, 1),
-				withPos(newTokenDefault(1, 1, []byte{0xe0, 0xbf, 0xbe}), 6, 3, 0, 2),
-				withPos(newTokenDefault(1, 1, []byte{0xe0, 0xbf, 0xbf}), 9, 3, 0, 3),
-				withPos(newEOFTokenDefault(), 12, 0, 0, 4),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					// all 3 byte characters
-					newLexEntryDefaultNOP("char_3_byte", "[\xe0\xa0\x80-\xef\xbf\xbf]"),
-				},
-			},
-			src: string([]byte{
-				0xe0, 0xa0, 0x80,
-				0xe0, 0xa0, 0x81,
-				0xe0, 0xbf, 0xbe,
-				0xe0, 0xbf, 0xbf,
-				0xe1, 0x80, 0x80,
-				0xe1, 0x80, 0x81,
-				0xec, 0xbf, 0xbe,
-				0xec, 0xbf, 0xbf,
-				0xed, 0x80, 0x80,
-				0xed, 0x80, 0x81,
-				0xed, 0x9f, 0xbe,
-				0xed, 0x9f, 0xbf,
-				0xee, 0x80, 0x80,
-				0xee, 0x80, 0x81,
-				0xef, 0xbf, 0xbe,
-				0xef, 0xbf, 0xbf,
-			}),
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte{0xe0, 0xa0, 0x80}), 0, 3, 0, 0),
-				withPos(newTokenDefault(1, 1, []byte{0xe0, 0xa0, 0x81}), 3, 3, 0, 1),
-				withPos(newTokenDefault(1, 1, []byte{0xe0, 0xbf, 0xbe}), 6, 3, 0, 2),
-				withPos(newTokenDefault(1, 1, []byte{0xe0, 0xbf, 0xbf}), 9, 3, 0, 3),
-				withPos(newTokenDefault(1, 1, []byte{0xe1, 0x80, 0x80}), 12, 3, 0, 4),
-				withPos(newTokenDefault(1, 1, []byte{0xe1, 0x80, 0x81}), 15, 3, 0, 5),
-				withPos(newTokenDefault(1, 1, []byte{0xec, 0xbf, 0xbe}), 18, 3, 0, 6),
-				withPos(newTokenDefault(1, 1, []byte{0xec, 0xbf, 0xbf}), 21, 3, 0, 7),
-				withPos(newTokenDefault(1, 1, []byte{0xed, 0x80, 0x80}), 24, 3, 0, 8),
-				withPos(newTokenDefault(1, 1, []byte{0xed, 0x80, 0x81}), 27, 3, 0, 9),
-				withPos(newTokenDefault(1, 1, []byte{0xed, 0x9f, 0xbe}), 30, 3, 0, 10),
-				withPos(newTokenDefault(1, 1, []byte{0xed, 0x9f, 0xbf}), 33, 3, 0, 11),
-				withPos(newTokenDefault(1, 1, []byte{0xee, 0x80, 0x80}), 36, 3, 0, 12),
-				withPos(newTokenDefault(1, 1, []byte{0xee, 0x80, 0x81}), 39, 3, 0, 13),
-				withPos(newTokenDefault(1, 1, []byte{0xef, 0xbf, 0xbe}), 42, 3, 0, 14),
-				withPos(newTokenDefault(1, 1, []byte{0xef, 0xbf, 0xbf}), 45, 3, 0, 15),
-				withPos(newEOFTokenDefault(), 48, 0, 0, 16),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					// All bytes are the same.
-					newLexEntryDefaultNOP("char_4_byte", "[\xf0\x90\x80\x80-\xf0\x90\x80\x80]"),
-				},
-			},
-			src: string([]byte{
-				0xf0, 0x90, 0x80, 0x80,
-			}),
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte{0xf0, 0x90, 0x80, 0x80}), 0, 4, 0, 0),
-				withPos(newEOFTokenDefault(), 4, 0, 0, 1),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					// The first 3 bytes are the same.
-					newLexEntryDefaultNOP("char_4_byte", "[\xf0\x90\x80\x80-\xf0\x90\x80\xbf]"),
-				},
-			},
-			src: string([]byte{
-				0xf0, 0x90, 0x80, 0x80,
-				0xf0, 0x90, 0x80, 0x81,
-				0xf0, 0x90, 0x80, 0xbe,
-				0xf0, 0x90, 0x80, 0xbf,
-			}),
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte{0xf0, 0x90, 0x80, 0x80}), 0, 4, 0, 0),
-				withPos(newTokenDefault(1, 1, []byte{0xf0, 0x90, 0x80, 0x81}), 4, 4, 0, 1),
-				withPos(newTokenDefault(1, 1, []byte{0xf0, 0x90, 0x80, 0xbe}), 8, 4, 0, 2),
-				withPos(newTokenDefault(1, 1, []byte{0xf0, 0x90, 0x80, 0xbf}), 12, 4, 0, 3),
-				withPos(newEOFTokenDefault(), 16, 0, 0, 4),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					// The first 2 bytes are the same.
-					newLexEntryDefaultNOP("char_4_byte", "[\xf0\x90\x80\x80-\xf0\x90\xbf\xbf]"),
-				},
-			},
-			src: string([]byte{
-				0xf0, 0x90, 0x80, 0x80,
-				0xf0, 0x90, 0x80, 0x81,
-				0xf0, 0x90, 0xbf, 0xbe,
-				0xf0, 0x90, 0xbf, 0xbf,
-			}),
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte{0xf0, 0x90, 0x80, 0x80}), 0, 4, 0, 0),
-				withPos(newTokenDefault(1, 1, []byte{0xf0, 0x90, 0x80, 0x81}), 4, 4, 0, 1),
-				withPos(newTokenDefault(1, 1, []byte{0xf0, 0x90, 0xbf, 0xbe}), 8, 4, 0, 2),
-				withPos(newTokenDefault(1, 1, []byte{0xf0, 0x90, 0xbf, 0xbf}), 12, 4, 0, 3),
-				withPos(newEOFTokenDefault(), 16, 0, 0, 4),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					// The first byte are the same.
-					newLexEntryDefaultNOP("char_4_byte", "[\xf0\x90\x80\x80-\xf0\xbf\xbf\xbf]"),
-				},
-			},
-			src: string([]byte{
-				0xf0, 0x90, 0x80, 0x80,
-				0xf0, 0x90, 0x80, 0x81,
-				0xf0, 0xbf, 0xbf, 0xbe,
-				0xf0, 0xbf, 0xbf, 0xbf,
-			}),
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte{0xf0, 0x90, 0x80, 0x80}), 0, 4, 0, 0),
-				withPos(newTokenDefault(1, 1, []byte{0xf0, 0x90, 0x80, 0x81}), 4, 4, 0, 1),
-				withPos(newTokenDefault(1, 1, []byte{0xf0, 0xbf, 0xbf, 0xbe}), 8, 4, 0, 2),
-				withPos(newTokenDefault(1, 1, []byte{0xf0, 0xbf, 0xbf, 0xbf}), 12, 4, 0, 3),
-				withPos(newEOFTokenDefault(), 16, 0, 0, 4),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					// all 4 byte characters
-					newLexEntryDefaultNOP("char_4_byte", "[\xf0\x90\x80\x80-\xf4\x8f\xbf\xbf]"),
-				},
-			},
-			src: string([]byte{
-				0xf0, 0x90, 0x80, 0x80,
-				0xf0, 0x90, 0x80, 0x81,
-				0xf0, 0xbf, 0xbf, 0xbe,
-				0xf0, 0xbf, 0xbf, 0xbf,
-				0xf1, 0x80, 0x80, 0x80,
-				0xf1, 0x80, 0x80, 0x81,
-				0xf3, 0xbf, 0xbf, 0xbe,
-				0xf3, 0xbf, 0xbf, 0xbf,
-				0xf4, 0x80, 0x80, 0x80,
-				0xf4, 0x80, 0x80, 0x81,
-				0xf4, 0x8f, 0xbf, 0xbe,
-				0xf4, 0x8f, 0xbf, 0xbf,
-			}),
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte{0xf0, 0x90, 0x80, 0x80}), 0, 4, 0, 0),
-				withPos(newTokenDefault(1, 1, []byte{0xf0, 0x90, 0x80, 0x81}), 4, 4, 0, 1),
-				withPos(newTokenDefault(1, 1, []byte{0xf0, 0xbf, 0xbf, 0xbe}), 8, 4, 0, 2),
-				withPos(newTokenDefault(1, 1, []byte{0xf0, 0xbf, 0xbf, 0xbf}), 12, 4, 0, 3),
-				withPos(newTokenDefault(1, 1, []byte{0xf1, 0x80, 0x80, 0x80}), 16, 4, 0, 4),
-				withPos(newTokenDefault(1, 1, []byte{0xf1, 0x80, 0x80, 0x81}), 20, 4, 0, 5),
-				withPos(newTokenDefault(1, 1, []byte{0xf3, 0xbf, 0xbf, 0xbe}), 24, 4, 0, 6),
-				withPos(newTokenDefault(1, 1, []byte{0xf3, 0xbf, 0xbf, 0xbf}), 28, 4, 0, 7),
-				withPos(newTokenDefault(1, 1, []byte{0xf4, 0x80, 0x80, 0x80}), 32, 4, 0, 8),
-				withPos(newTokenDefault(1, 1, []byte{0xf4, 0x80, 0x80, 0x81}), 36, 4, 0, 9),
-				withPos(newTokenDefault(1, 1, []byte{0xf4, 0x8f, 0xbf, 0xbe}), 40, 4, 0, 10),
-				withPos(newTokenDefault(1, 1, []byte{0xf4, 0x8f, 0xbf, 0xbf}), 44, 4, 0, 11),
-				withPos(newEOFTokenDefault(), 48, 0, 0, 12),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					newLexEntryDefaultNOP("non_number", "[^0-9]+[0-9]"),
-				},
-			},
-			src: "foo9",
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte("foo9")), 0, 4, 0, 0),
-				withPos(newEOFTokenDefault(), 4, 0, 0, 4),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					newLexEntryDefaultNOP("char_1_byte", "\\u{006E}"),
-					newLexEntryDefaultNOP("char_2_byte", "\\u{03BD}"),
-					newLexEntryDefaultNOP("char_3_byte", "\\u{306B}"),
-					newLexEntryDefaultNOP("char_4_byte", "\\u{01F638}"),
-				},
-			},
-			src: "nνに😸",
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte{0x6E}), 0, 1, 0, 0),
-				withPos(newTokenDefault(2, 2, []byte{0xCE, 0xBD}), 1, 2, 0, 1),
-				withPos(newTokenDefault(3, 3, []byte{0xE3, 0x81, 0xAB}), 3, 3, 0, 2),
-				withPos(newTokenDefault(4, 4, []byte{0xF0, 0x9F, 0x98, 0xB8}), 6, 4, 0, 3),
-				withPos(newEOFTokenDefault(), 10, 0, 0, 4),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					newLexEntryDefaultNOP("code_points_alt", "[\\u{006E}\\u{03BD}\\u{306B}\\u{01F638}]"),
-				},
-			},
-			src: "nνに😸",
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte{0x6E}), 0, 1, 0, 0),
-				withPos(newTokenDefault(1, 1, []byte{0xCE, 0xBD}), 1, 2, 0, 1),
-				withPos(newTokenDefault(1, 1, []byte{0xE3, 0x81, 0xAB}), 3, 3, 0, 2),
-				withPos(newTokenDefault(1, 1, []byte{0xF0, 0x9F, 0x98, 0xB8}), 6, 4, 0, 3),
-				withPos(newEOFTokenDefault(), 10, 0, 0, 4),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					newLexEntryDefaultNOP("t1", "\\f{a2c}\\f{d2f}+"),
-					newLexEntryFragment("a2c", "abc"),
-					newLexEntryFragment("d2f", "def"),
-				},
-			},
-			src: "abcdefdefabcdef",
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte("abcdefdef")), 0, 9, 0, 0),
-				withPos(newTokenDefault(1, 1, []byte("abcdef")), 9, 6, 0, 9),
-				withPos(newEOFTokenDefault(), 15, 0, 0, 15),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					newLexEntryDefaultNOP("t1", "(\\f{a2c}|\\f{d2f})+"),
-					newLexEntryFragment("a2c", "abc"),
-					newLexEntryFragment("d2f", "def"),
-				},
-			},
-			src: "abcdefdefabc",
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte("abcdefdefabc")), 0, 12, 0, 0),
-				withPos(newEOFTokenDefault(), 12, 0, 0, 12),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					newLexEntryDefaultNOP("t1", "\\f{a2c_or_d2f}+"),
-					newLexEntryFragment("a2c_or_d2f", "\\f{a2c}|\\f{d2f}"),
-					newLexEntryFragment("a2c", "abc"),
-					newLexEntryFragment("d2f", "def"),
-				},
-			},
-			src: "abcdefdefabc",
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte("abcdefdefabc")), 0, 12, 0, 0),
-				withPos(newEOFTokenDefault(), 12, 0, 0, 12),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					newLexEntryDefaultNOP("white_space", ` *`),
-					newLexEntry([]string{"default"}, "string_open", `"`, "string", false),
-					newLexEntry([]string{"string"}, "escape_sequence", `\\[n"\\]`, "", false),
-					newLexEntry([]string{"string"}, "char_sequence", `[^"\\]*`, "", false),
-					newLexEntry([]string{"string"}, "string_close", `"`, "", true),
-				},
-			},
-			src: `"" "Hello world.\n\"Hello world.\""`,
-			tokens: []*Token{
-				withPos(newToken(1, 2, 2, []byte(`"`)), 0, 1, 0, 0),
-				withPos(newToken(2, 5, 3, []byte(`"`)), 1, 1, 0, 1),
-				withPos(newToken(1, 1, 1, []byte(` `)), 2, 1, 0, 2),
-				withPos(newToken(1, 2, 2, []byte(`"`)), 3, 1, 0, 3),
-				withPos(newToken(2, 4, 2, []byte(`Hello world.`)), 4, 12, 0, 4),
-				withPos(newToken(2, 3, 1, []byte(`\n`)), 16, 2, 0, 16),
-				withPos(newToken(2, 3, 1, []byte(`\"`)), 18, 2, 0, 18),
-				withPos(newToken(2, 4, 2, []byte(`Hello world.`)), 20, 12, 0, 20),
-				withPos(newToken(2, 3, 1, []byte(`\"`)), 32, 2, 0, 32),
-				withPos(newToken(2, 5, 3, []byte(`"`)), 34, 1, 0, 34),
-				withPos(newEOFTokenDefault(), 35, 0, 0, 35),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					// `white_space` is enabled in multiple modes.
-					newLexEntry([]string{"default", "state_a", "state_b"}, "white_space", ` *`, "", false),
-					newLexEntry([]string{"default"}, "char_a", `a`, "state_a", false),
-					newLexEntry([]string{"state_a"}, "char_b", `b`, "state_b", false),
-					newLexEntry([]string{"state_a"}, "back_from_a", `<`, "", true),
-					newLexEntry([]string{"state_b"}, "back_from_b", `<`, "", true),
-				},
-			},
-			src: ` a b < < `,
-			tokens: []*Token{
-				withPos(newToken(1, 1, 1, []byte(` `)), 0, 1, 0, 0),
-				withPos(newToken(1, 2, 2, []byte(`a`)), 1, 1, 0, 1),
-				withPos(newToken(2, 1, 1, []byte(` `)), 2, 1, 0, 2),
-				withPos(newToken(2, 3, 2, []byte(`b`)), 3, 1, 0, 3),
-				withPos(newToken(3, 1, 1, []byte(` `)), 4, 1, 0, 4),
-				withPos(newToken(3, 5, 2, []byte(`<`)), 5, 1, 0, 5),
-				withPos(newToken(2, 1, 1, []byte(` `)), 6, 1, 0, 6),
-				withPos(newToken(2, 4, 3, []byte(`<`)), 7, 1, 0, 7),
-				withPos(newToken(1, 1, 1, []byte(` `)), 8, 1, 0, 8),
-				withPos(newEOFTokenDefault(), 9, 0, 0, 9),
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					newLexEntry([]string{"default", "mode_1", "mode_2"}, "white_space", ` *`, "", false),
-					newLexEntry([]string{"default"}, "char", `.`, "", false),
-					newLexEntry([]string{"default"}, "push_1", `-> 1`, "", false),
-					newLexEntry([]string{"mode_1"}, "push_2", `-> 2`, "", false),
-					newLexEntry([]string{"mode_1"}, "pop_1", `<-`, "", false),
-					newLexEntry([]string{"mode_2"}, "pop_2", `<-`, "", false),
-				},
-			},
-			src: `-> 1 -> 2 <- <- a`,
-			tokens: []*Token{
-				withPos(newToken(1, 3, 3, []byte(`-> 1`)), 0, 4, 0, 0),
-				withPos(newToken(2, 1, 1, []byte(` `)), 4, 1, 0, 4),
-				withPos(newToken(2, 4, 2, []byte(`-> 2`)), 5, 4, 0, 5),
-				withPos(newToken(3, 1, 1, []byte(` `)), 9, 1, 0, 9),
-				withPos(newToken(3, 6, 2, []byte(`<-`)), 10, 2, 0, 10),
-				withPos(newToken(2, 1, 1, []byte(` `)), 12, 1, 0, 12),
-				withPos(newToken(2, 5, 3, []byte(`<-`)), 13, 2, 0, 13),
-				withPos(newToken(1, 1, 1, []byte(` `)), 15, 1, 0, 15),
-				withPos(newToken(1, 2, 2, []byte(`a`)), 16, 1, 0, 16),
-				withPos(newEOFTokenDefault(), 17, 0, 0, 17),
-			},
-			passiveModeTran: true,
-			tran: func(l *Lexer, tok *Token) error {
-				switch l.spec.ModeName(l.Mode()) {
-				case "default":
-					switch tok.KindID {
-					case 3: // push_1
-						l.PushMode(2)
-					}
-				case "mode_1":
-					switch tok.KindID {
-					case 4: // push_2
-						l.PushMode(3)
-					case 5: // pop_1
-						return l.PopMode()
-					}
-				case "mode_2":
-					switch tok.KindID {
-					case 6: // pop_2
-						return l.PopMode()
-					}
-				}
-				return nil
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					newLexEntry([]string{"default", "mode_1", "mode_2"}, "white_space", ` *`, "", false),
-					newLexEntry([]string{"default"}, "char", `.`, "", false),
-					newLexEntry([]string{"default"}, "push_1", `-> 1`, "mode_1", false),
-					newLexEntry([]string{"mode_1"}, "push_2", `-> 2`, "", false),
-					newLexEntry([]string{"mode_1"}, "pop_1", `<-`, "", false),
-					newLexEntry([]string{"mode_2"}, "pop_2", `<-`, "", true),
-				},
-			},
-			src: `-> 1 -> 2 <- <- a`,
-			tokens: []*Token{
-				withPos(newToken(1, 3, 3, []byte(`-> 1`)), 0, 4, 0, 0),
-				withPos(newToken(2, 1, 1, []byte(` `)), 4, 1, 0, 4),
-				withPos(newToken(2, 4, 2, []byte(`-> 2`)), 5, 4, 0, 5),
-				withPos(newToken(3, 1, 1, []byte(` `)), 9, 1, 0, 9),
-				withPos(newToken(3, 6, 2, []byte(`<-`)), 10, 2, 0, 10),
-				withPos(newToken(2, 1, 1, []byte(` `)), 12, 1, 0, 12),
-				withPos(newToken(2, 5, 3, []byte(`<-`)), 13, 2, 0, 13),
-				withPos(newToken(1, 1, 1, []byte(` `)), 15, 1, 0, 15),
-				withPos(newToken(1, 2, 2, []byte(`a`)), 16, 1, 0, 16),
-				withPos(newEOFTokenDefault(), 17, 0, 0, 17),
-			},
-			// Active mode transition and an external transition function can be used together.
-			passiveModeTran: false,
-			tran: func(l *Lexer, tok *Token) error {
-				switch l.spec.ModeName(l.Mode()) {
-				case "mode_1":
-					switch tok.KindID {
-					case 4: // push_2
-						l.PushMode(3)
-					case 5: // pop_1
-						return l.PopMode()
-					}
-				}
-				return nil
-			},
-		},
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					newLexEntryDefaultNOP("dot", spec.EscapePattern(`.`)),
-					newLexEntryDefaultNOP("star", spec.EscapePattern(`*`)),
-					newLexEntryDefaultNOP("plus", spec.EscapePattern(`+`)),
-					newLexEntryDefaultNOP("question", spec.EscapePattern(`?`)),
-					newLexEntryDefaultNOP("vbar", spec.EscapePattern(`|`)),
-					newLexEntryDefaultNOP("lparen", spec.EscapePattern(`(`)),
-					newLexEntryDefaultNOP("rparen", spec.EscapePattern(`)`)),
-					newLexEntryDefaultNOP("lbrace", spec.EscapePattern(`[`)),
-					newLexEntryDefaultNOP("backslash", spec.EscapePattern(`\`)),
-				},
-			},
-			src: `.*+?|()[\`,
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte(`.`)), 0, 1, 0, 0),
-				withPos(newTokenDefault(2, 2, []byte(`*`)), 1, 1, 0, 1),
-				withPos(newTokenDefault(3, 3, []byte(`+`)), 2, 1, 0, 2),
-				withPos(newTokenDefault(4, 4, []byte(`?`)), 3, 1, 0, 3),
-				withPos(newTokenDefault(5, 5, []byte(`|`)), 4, 1, 0, 4),
-				withPos(newTokenDefault(6, 6, []byte(`(`)), 5, 1, 0, 5),
-				withPos(newTokenDefault(7, 7, []byte(`)`)), 6, 1, 0, 6),
-				withPos(newTokenDefault(8, 8, []byte(`[`)), 7, 1, 0, 7),
-				withPos(newTokenDefault(9, 9, []byte(`\`)), 8, 1, 0, 8),
-				withPos(newEOFTokenDefault(), 9, 0, 0, 9),
-			},
-		},
-		// Character properties are available in a bracket expression.
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					newLexEntryDefaultNOP("letter", `[\p{Letter}]+`),
-					newLexEntryDefaultNOP("non_letter", `[^\p{Letter}]+`),
-				},
-			},
-			src: `foo123`,
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte(`foo`)), 0, 3, 0, 0),
-				withPos(newTokenDefault(2, 2, []byte(`123`)), 3, 3, 0, 3),
-				withPos(newEOFTokenDefault(), 6, 0, 0, 6),
-			},
-		},
-		// The driver can continue lexical analysis even after it detects an invalid token.
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					newLexEntryDefaultNOP("lower", `[a-z]+`),
-				},
-			},
-			src: `foo123bar`,
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte(`foo`)), 0, 3, 0, 0),
-				withPos(newInvalidTokenDefault([]byte(`123`)), 3, 3, 0, 3),
-				withPos(newTokenDefault(1, 1, []byte(`bar`)), 6, 3, 0, 6),
-				withPos(newEOFTokenDefault(), 9, 0, 0, 9),
-			},
-		},
-		// The driver can detect an invalid token immediately preceding an EOF.
-		{
-			lspec: &lexical.LexSpec{
-				Entries: []*lexical.LexEntry{
-					newLexEntryDefaultNOP("lower", `[a-z]+`),
-				},
-			},
-			src: `foo123`,
-			tokens: []*Token{
-				withPos(newTokenDefault(1, 1, []byte(`foo`)), 0, 3, 0, 0),
-				withPos(newInvalidTokenDefault([]byte(`123`)), 3, 3, 0, 3),
-				withPos(newEOFTokenDefault(), 6, 0, 0, 6),
-			},
-		},
-	}
-	for i, tt := range test {
-		for compLv := lexical.CompressionLevelMin; compLv <= lexical.CompressionLevelMax; compLv++ {
-			t.Run(fmt.Sprintf("#%v-%v", i, compLv), func(t *testing.T) {
-				clspec, err, cerrs := lexical.Compile(tt.lspec, compLv)
-				if err != nil {
-					for _, cerr := range cerrs {
-						t.Logf("%#v", cerr)
-					}
-					t.Fatalf("unexpected error: %v", err)
-				}
-				opts := []LexerOption{}
-				if tt.passiveModeTran {
-					opts = append(opts, DisableModeTransition())
-				}
-				lexer, err := NewLexer(NewLexSpec(clspec), strings.NewReader(tt.src), opts...)
-				if err != nil {
-					t.Fatalf("unexpected error: %v", err)
-				}
-				for _, eTok := range tt.tokens {
-					tok, err := lexer.Next()
-					if err != nil {
-						t.Log(err)
-						break
-					}
-					testToken(t, eTok, tok)
-
-					if tok.EOF {
-						break
-					}
-
-					if tt.tran != nil {
-						err := tt.tran(lexer, tok)
-						if err != nil {
-							t.Fatalf("unexpected error: %v", err)
-						}
-					}
-				}
-			})
-		}
-	}
-}
-
-func TestLexer_Next_WithPosition(t *testing.T) {
-	lspec := &lexical.LexSpec{
-		Entries: []*lexical.LexEntry{
-			newLexEntryDefaultNOP("newline", `\u{000A}+`),
-			newLexEntryDefaultNOP("any", `.`),
-		},
-	}
-
-	clspec, err, _ := lexical.Compile(lspec, lexical.CompressionLevelMax)
-	if err != nil {
-		t.Fatalf("unexpected error: %v", err)
-	}
-
-	src := string([]byte{
-		0x00,
-		0x7F,
-		0x0A,
-
-		0xC2, 0x80,
-		0xDF, 0xBF,
-		0x0A,
-
-		0xE0, 0xA0, 0x80,
-		0xE0, 0xBF, 0xBF,
-		0xE1, 0x80, 0x80,
-		0xEC, 0xBF, 0xBF,
-		0xED, 0x80, 0x80,
-		0xED, 0x9F, 0xBF,
-		0xEE, 0x80, 0x80,
-		0xEF, 0xBF, 0xBF,
-		0x0A,
-
-		0xF0, 0x90, 0x80, 0x80,
-		0xF0, 0xBF, 0xBF, 0xBF,
-		0xF1, 0x80, 0x80, 0x80,
-		0xF3, 0xBF, 0xBF, 0xBF,
-		0xF4, 0x80, 0x80, 0x80,
-		0xF4, 0x8F, 0xBF, 0xBF,
-		0x0A,
-		0x0A,
-		0x0A,
-	})
-
-	expected := []*Token{
-		withPos(newTokenDefault(2, 2, []byte{0x00}), 0, 1, 0, 0),
-		withPos(newTokenDefault(2, 2, []byte{0x7F}), 1, 1, 0, 1),
-		withPos(newTokenDefault(1, 1, []byte{0x0A}), 2, 1, 0, 2),
-
-		withPos(newTokenDefault(2, 2, []byte{0xC2, 0x80}), 3, 2, 1, 0),
-		withPos(newTokenDefault(2, 2, []byte{0xDF, 0xBF}), 5, 2, 1, 1),
-		withPos(newTokenDefault(1, 1, []byte{0x0A}), 7, 1, 1, 2),
-
-		withPos(newTokenDefault(2, 2, []byte{0xE0, 0xA0, 0x80}), 8, 3, 2, 0),
-		withPos(newTokenDefault(2, 2, []byte{0xE0, 0xBF, 0xBF}), 11, 3, 2, 1),
-		withPos(newTokenDefault(2, 2, []byte{0xE1, 0x80, 0x80}), 14, 3, 2, 2),
-		withPos(newTokenDefault(2, 2, []byte{0xEC, 0xBF, 0xBF}), 17, 3, 2, 3),
-		withPos(newTokenDefault(2, 2, []byte{0xED, 0x80, 0x80}), 20, 3, 2, 4),
-		withPos(newTokenDefault(2, 2, []byte{0xED, 0x9F, 0xBF}), 23, 3, 2, 5),
-		withPos(newTokenDefault(2, 2, []byte{0xEE, 0x80, 0x80}), 26, 3, 2, 6),
-		withPos(newTokenDefault(2, 2, []byte{0xEF, 0xBF, 0xBF}), 29, 3, 2, 7),
-		withPos(newTokenDefault(1, 1, []byte{0x0A}), 32, 1, 2, 8),
-
-		withPos(newTokenDefault(2, 2, []byte{0xF0, 0x90, 0x80, 0x80}), 33, 4, 3, 0),
-		withPos(newTokenDefault(2, 2, []byte{0xF0, 0xBF, 0xBF, 0xBF}), 37, 4, 3, 1),
-		withPos(newTokenDefault(2, 2, []byte{0xF1, 0x80, 0x80, 0x80}), 41, 4, 3, 2),
-		withPos(newTokenDefault(2, 2, []byte{0xF3, 0xBF, 0xBF, 0xBF}), 45, 4, 3, 3),
-		withPos(newTokenDefault(2, 2, []byte{0xF4, 0x80, 0x80, 0x80}), 49, 4, 3, 4),
-		withPos(newTokenDefault(2, 2, []byte{0xF4, 0x8F, 0xBF, 0xBF}), 53, 4, 3, 5),
-		// When a token contains multiple line breaks, the driver sets the token position to
-		// the line number where a lexeme first appears.
-		withPos(newTokenDefault(1, 1, []byte{0x0A, 0x0A, 0x0A}), 57, 3, 3, 6),
-
-		withPos(newEOFTokenDefault(), 60, 0, 6, 0),
-	}
-
-	lexer, err := NewLexer(NewLexSpec(clspec), strings.NewReader(src))
-	if err != nil {
-		t.Fatalf("unexpected error: %v", err)
-	}
-
-	for _, eTok := range expected {
-		tok, err := lexer.Next()
-		if err != nil {
-			t.Fatal(err)
-		}
-
-		testToken(t, eTok, tok)
-
-		if tok.EOF {
-			break
-		}
-	}
-}
-
-func testToken(t *testing.T, expected, actual *Token) {
-	t.Helper()
-
-	if actual.ModeID != expected.ModeID ||
-		actual.KindID != expected.KindID ||
-		actual.ModeKindID != expected.ModeKindID ||
-		!bytes.Equal(actual.Lexeme, expected.Lexeme) ||
-		actual.EOF != expected.EOF ||
-		actual.Invalid != expected.Invalid {
-		t.Fatalf(`unexpected token; want: %+v, got: %+v`, expected, actual)
-	}
-
-	if actual.BytePos != expected.BytePos || actual.ByteLen != expected.ByteLen ||
-		actual.Row != expected.Row || actual.Col != expected.Col {
-		t.Fatalf(`unexpected token; want: %+v, got: %+v`, expected, actual)
-	}
-}