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mod edge_type;
mod node;
mod pattern;

pub use edge_type::*;
pub use node::*;
pub use pattern::*;

use thiserror::Error;

#[derive(Debug, Error, Eq, PartialEq)]
/// Errors that can occur when working with a [Pattern]
pub enum PatternError {
    #[error("Node index {0} exceeds the number of nodes in the pattern")]
    /// An error that occurs when a node index exceeds the number of nodes in the [Pattern]
    NodeIndexOutOfBounds(usize),

    #[error("The pattern contains a cycle")]
    /// An error that occurs when the [Pattern] contains a cycle
    ContainsCycle,
}

/// A result type for operations on a [Pattern]
pub type Result<T> = std::result::Result<T, PatternError>;