func (S *Lexer) KeywordOrIdent() *Token {
buf := util.NewStringBuffer()
for S.isLetter() {
buf.Append(S.ch)
S.LETTER()
}
str := buf.String()
switch str {
case "import":
return &Token{tokenType: IMPORT, text: str}
case "static":
return &Token{tokenType: STATIC, text: str}
case "package":
return &Token{tokenType: PACKAGE, text: str}
case "class":
return &Token{tokenType: CLASS, text: str}
case "case":
return &Token{tokenType: CASE, text: str}
case "match":
return &Token{tokenType: MATCH, text: str}
case "return":
return &Token{tokenType: RETURN, text: str}
default:
return &Token{tokenType: IDENT, text: str}
}
return nil
}
func TestStringBuffer(t *testing.T) {
b := util.NewStringBuffer()
s := "abcกขค"
for _, ch := range s {
b.Append(ch)
}
if b.String() != s {
t.Fatalf("string buffer error")
}
b.AppendStr("xyz")
if b.String() != "abcกขคxyz" {
t.Fatalf("string buffer error")
}
}