scanner: emit T_STRING when enum not in enum declaration context

internal/php8/lexer.go

@@ -67,6 +67,24 @@ func (lex *Lexer) setTokenPosition(token *token.Token) {
 	token.Position = pos
 }
 
+func (lex *Lexer) setTokenPrefixPosition(token *token.Token, n int) {
+	pos := lex.positionPool.Get()
+
+	endPos := lex.ts + n
+
+	sl, slb := lex.newLines.GetLine(lex.ts)
+	el, elb := lex.newLines.GetLine(endPos)
+
+	pos.StartLine = sl
+	pos.EndLine = el
+	pos.StartPos = lex.ts
+	pos.EndPos = endPos
+	pos.StartCol = lex.ts - slb
+	pos.EndCol = endPos - elb
+
+	token.Position = pos
+}
+
 func (lex *Lexer) addFreeFloatingToken(t *token.Token, id token.ID, ps, pe int) {
 	skippedTkn := lex.tokenPool.Get()
 	skippedTkn.ID = id
@@ -198,6 +216,11 @@ func (lex *Lexer) ungetStr(s string) {
 	}
 }
 
+func (lex *Lexer) ungetFromStart(n int) {
+	tokenLength := lex.te - lex.ts
+	lex.ungetCnt(tokenLength - n)
+}
+
 func (lex *Lexer) ungetCnt(n int) {
 	lex.p = lex.p - n
 	lex.te = lex.te - n

internal/php8/php8.y

@@ -4,8 +4,8 @@ package php8
 import (
     "strconv"
 
-    "github.com/VKCOM/php-parser/pkg/ast"
+    "github.com/laytan/php-parser/pkg/ast"
-    "github.com/VKCOM/php-parser/pkg/token"
+    "github.com/laytan/php-parser/pkg/token"
 )
 
 %}

internal/php8/scanner.rl

@@ -6,7 +6,7 @@ import (
     "strconv"
     "strings"
 
-    "github.com/VKCOM/php-parser/pkg/token"
+    "github.com/laytan/php-parser/pkg/token"
 )
 
 %%{ 
@@ -240,7 +240,8 @@ func (lex *Lexer) Lex() *token.Token {
             'endif'i                          => {lex.setTokenPosition(tkn); tok = token.T_ENDIF; fbreak;};
             'endswitch'i                      => {lex.setTokenPosition(tkn); tok = token.T_ENDSWITCH; fbreak;};
             'endwhile'i                       => {lex.setTokenPosition(tkn); tok = token.T_ENDWHILE; fbreak;};
-            'enum'i                           => {lex.setTokenPosition(tkn); tok = token.T_ENUM; fbreak;};
+            'enum'i whitespace+ varname_first => {lex.setTokenPrefixPosition(tkn, 4); tok = token.T_ENUM;  lex.ungetFromStart(4); fbreak;};
+            'enum'i whitespace+ ('extends'i | 'implements'i) => {lex.setTokenPrefixPosition(tkn, 4); tok = token.T_STRING; lex.ungetFromStart(4); fbreak;};
             'eval'i                           => {lex.setTokenPosition(tkn); tok = token.T_EVAL; fbreak;};
             'exit'i | 'die'i                  => {lex.setTokenPosition(tkn); tok = token.T_EXIT; fbreak;};
             'extends'i                        => {lex.setTokenPosition(tkn); tok = token.T_EXTENDS; fbreak;};

internal/php8/scanner_php8_1_test.go

@@ -181,6 +181,31 @@ func TestEnumTokens(t *testing.T) {
 	suite.Run()
 }
 
+func TestClassNameEnum(t *testing.T) {
+	suite := tester.NewLexerTokenStructTestSuite(t)
+	suite.UsePHP8()
+	suite.Code = "<?php class Enum {}"
+	suite.Expected = []*token.Token{
+		{
+			ID:    token.T_CLASS,
+			Value: []byte("class"),
+		},
+		{
+			ID:    token.T_STRING,
+			Value: []byte("Enum"),
+		},
+		{
+			ID:    '{',
+			Value: []byte("{"),
+		},
+		{
+			ID:    '}',
+			Value: []byte("}"),
+		},
+	}
+	suite.Run()
+}
+
 func TestAmpersandFollowedByEllipsisTokens(t *testing.T) {
 	suite := tester.NewLexerTokenStructTestSuite(t)
 	suite.UsePHP8()