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9 changes: 9 additions & 0 deletions libs/calypso-cangen/src/validate.rs
Original file line number Diff line number Diff line change
Expand Up @@ -71,6 +71,9 @@ pub enum CANSpecError {
#[error("Duplicate topic names {0}, last seen at message {1}")]
DuplicateTopicNames(String, String),

#[error("Invalid topic name {0}")]
InvalidTopicName(String),

#[error(transparent)] // Pass-through for IO error
IOError(#[from] std::io::Error),
}
Expand Down Expand Up @@ -314,6 +317,12 @@ fn validate_msg(
_msg.desc.clone(),
));
}

// check topic contains valid chars
if _field.name.chars().any(|c| "?#*.".contains(c)) {
_errors.push(CANSpecError::InvalidTopicName(_field.name.clone()));
}

_topics.insert(_field.name.clone());
}

Expand Down
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