fontmerge 0.2.2

Merge two font source files, copying glyphs and OpenType layout features from one font to another
Documentation 
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use babelfont::BabelfontError;
use thiserror::Error;
/// Error type for fontmerge
#[derive(Error, Debug)]
pub enum FontmergeError {
    /// IO errors
    #[error("IO error: {0}")]
    Io(#[from] std::io::Error),

    /// Font parsing errors
    #[error("Font error: {0}")]
    Font(String),

    /// Parsing errors
    #[error("Parse error: {0}")]
    Parse(String),

    /// Interpolation errors
    #[error("Interpolation error: {0}")]
    Interpolation(String),

    /// Layout closure errors
    #[error("Glyphset grew unreasonably during layout closure")]
    LayoutClosureError,

    /// Source loading error
    #[error("Source loading error: {0}")]
    SourceLoadError(#[from] fea_rs_ast::fea_rs::parse::SourceLoadError),

    /// Source manipulation error
    #[error("Source manipulation error: {0}")]
    SourceManipulationError(#[from] BabelfontError),
    /// No glyphs selected for merging
    #[error("No glyphs selected for merging from donor font")]
    NoGlyphsSelected,

    #[error("Delta error: {0}")]
    /// An error occurred while processing a delta
    Delta(#[from] fontdrasil::variations::DeltaError),

    #[error("Axis conversion error: {0}")]
    /// An error occurred while converting axes
    AxisConversion(#[from] fontdrasil::error::Error),
}