Set the lexer as a field on parser

goos: linux
goarch: amd64
pkg: roseh.moe/pkg/ccl
cpu: AMD Ryzen 9 5900X 12-Core Processor
         │ baseline.txt │              new.txt               │
         │    sec/op    │   sec/op     vs base               │
Parse-24    4.808µ ± 0%   4.739µ ± 0%  -1.44% (p=0.000 n=20)

3 files changed, 4 insertions, 8 deletions

diff --git a/ccl.go b/ccl.go
index 6d97152..d0d06e9 100644
--- a/ccl.go
+++ b/ccl.go
@@ -242,7 +242,7 @@ func fieldMap(out map[structField]int, types map[reflect.Type]bool, s reflect.Ty
 }
 
 type parser struct {
-	nextTok  func() (token, error)
+	lexer    lexer
 	tok      []byte
 	err      error
 	data     []byte
@@ -260,7 +260,7 @@ func (p *parser) peek() ([]byte, error) {
 	if p.err != nil || p.tok != nil {
 		return p.tok, p.err
 	}
-	tok, err := p.nextTok()
+	tok, err := p.lexer.next()
 	if err != nil {
 		p.err = err
 		return nil, p.err
@@ -742,5 +742,5 @@ func Unmarshal(data []byte, v any) error {
 	if err := fieldMap(fields, make(map[reflect.Type]bool), val.Type().Elem()); err != nil {
 		return err
 	}
-	return (&parser{nextTok: newLexer(data).next, data: data, fieldMap: fields}).parse(val.Elem())
+	return (&parser{lexer: lexer{data: data}, data: data, fieldMap: fields}).parse(val.Elem())
 }
diff --git a/ccl_test.go b/ccl_test.go
index 53b2a24..fa51ab1 100644
--- a/ccl_test.go
+++ b/ccl_test.go
@@ -684,7 +684,7 @@ func BenchmarkLex(b *testing.B) {
 		repeated: [5, 6]
 	`)
 	for b.Loop() {
-		l := newLexer(msg)
+		l := &lexer{data: msg}
 		for {
 			_, err := l.next()
 			if err != nil {
diff --git a/lexer.go b/lexer.go
index 6561e38..a996451 100644
--- a/lexer.go
+++ b/lexer.go
@@ -113,7 +113,3 @@ func (l *lexer) next() (token, error) {
 	}
 	return token{}, l.error("invalid lexeme")
 }
-
-func newLexer(data []byte) *lexer {
-	return &lexer{data: data}
-}