From 753a65f4fd977d03e6f777a818983d172328b98c Mon Sep 17 00:00:00 2001
From: Frederic Lemoine <fredericlemoine@users.noreply.github.com>
Date: Wed, 4 Oct 2023 17:40:15 +0200
Subject: [PATCH] Reverted support for quotes in comments, because of pb with
 quotes in tip names #9

---
 io/newick/newick_lexer.go  | 2 --
 io/newick/newick_parser.go | 8 ++++----
 io/newick/newick_token.go  | 3 +--
 3 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/io/newick/newick_lexer.go b/io/newick/newick_lexer.go
index 82d52d1..0b14e2a 100644
--- a/io/newick/newick_lexer.go
+++ b/io/newick/newick_lexer.go
@@ -57,8 +57,6 @@ func (s *Scanner) Scan(ignoreSemiColumn bool) (tok Token, lit string) {
 		return OPENBRACK, string(ch)
 	case ']':
 		return CLOSEBRACK, string(ch)
-	case '\'':
-		return LABEL, string(ch)
 	case ',':
 		return NEWSIBLING, string(ch)
 	case ';':
diff --git a/io/newick/newick_parser.go b/io/newick/newick_parser.go
index 989d479..51d5285 100644
--- a/io/newick/newick_parser.go
+++ b/io/newick/newick_parser.go
@@ -62,7 +62,7 @@ func (p *Parser) scanIgnoreWhitespace() (tok Token, lit string) {
 func (p *Parser) Parse() (newtree *tree.Tree, err error) {
 	// May have information inside [] before the tree
 	tok, lit := p.scanIgnoreWhitespace()
-	if tok == OPENBRACK || tok == LABEL {
+	if tok == OPENBRACK {
 		if _, err = p.consumeComment(tok, lit); err != nil {
 			return
 		}
@@ -159,7 +159,7 @@ func (p *Parser) parseIter(t *tree.Tree, level *int) (prevTok Token, err error)
 				return
 			}
 			node, edge, _ = nodeStack.Head()
-		case OPENBRACK, LABEL:
+		case OPENBRACK:
 			var comment string
 			//if prevTok == OPENPAR || prevTok == NEWSIBLING || prevTok == -1 {
 			if comment, err = p.consumeComment(tok, lit); err != nil {
@@ -293,9 +293,9 @@ func (p *Parser) parseIter(t *tree.Tree, level *int) (prevTok Token, err error)
 // At the end returns the matching ] token and lit.
 // If the given token is not a [, then returns an error
 func (p *Parser) consumeComment(curtoken Token, curlit string) (comment string, err error) {
-	if curtoken == OPENBRACK || curtoken == LABEL {
+	if curtoken == OPENBRACK {
 		commenttoken, commentlit := p.scan(true)
-		for (curtoken == LABEL && commenttoken != LABEL) || (curtoken == OPENBRACK && commenttoken != CLOSEBRACK) {
+		for commenttoken != CLOSEBRACK {
 			if commenttoken == EOF || commenttoken == ILLEGAL {
 				err = fmt.Errorf("unmatched bracket: %s (%s)", comment, commentlit)
 				return
diff --git a/io/newick/newick_token.go b/io/newick/newick_token.go
index be2dbd5..45ec5aa 100644
--- a/io/newick/newick_token.go
+++ b/io/newick/newick_token.go
@@ -15,7 +15,6 @@ const (
 	STARTLEN   // :
 	OPENBRACK  // [ : For comment
 	CLOSEBRACK // ] : For comment
-	LABEL      // ' : For comment associated to nodes/edges
 	NEWSIBLING // ,
 	EOT        // ;
 )
@@ -36,5 +35,5 @@ func isIdent(ch rune, ignoreSemiColumn bool) bool {
 	return ch != '[' && ch != ']' &&
 		ch != '(' && ch != ')' &&
 		ch != ',' && ch != ':' &&
-		(ignoreSemiColumn || ch != ';') && ch != '\''
+		(ignoreSemiColumn || ch != ';')
 }