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| author | Ryo Nihei <nihei.dev@gmail.com> | 2021-07-02 00:04:56 +0900 |
|---|---|---|
| committer | Ryo Nihei <nihei.dev@gmail.com> | 2021-07-02 00:15:02 +0900 |
| commit | 24d9877e822c400240a7e86cf8835971ed969ac7 (patch) | |
| tree | f5bfca4fb67be35f5eadbda5249d31db79d331f9 /spec/lexer.go | |
| parent | Simplify syntax of modifiers and semantic actions (diff) | |
| download | cotia-24d9877e822c400240a7e86cf8835971ed969ac7.tar.gz cotia-24d9877e822c400240a7e86cf8835971ed969ac7.tar.xz | |
Prohibit defining identifiers beginning with an underscore
Identifiers beginning with an underscore are used as auto-generated identifiers.
Diffstat (limited to 'spec/lexer.go')
| -rw-r--r-- | spec/lexer.go | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/spec/lexer.go b/spec/lexer.go index 2be3918..a1bd6fc 100644 --- a/spec/lexer.go +++ b/spec/lexer.go @@ -160,6 +160,9 @@ func (l *lexer) lexAndSkipWSs() (*token, error) { case "kw_fragment": return newSymbolToken(tokenKindKWFragment), nil case "identifier": + if strings.HasPrefix(tok.Text(), "_") { + return nil, synErrAutoGenID + } return newIDToken(tok.Text()), nil case "terminal_open": var b strings.Builder |