source: code/trunk/vendor/github.com/alecthomas/chroma/v2/formatter.go@ 67

package chroma

import (
        "io"
)

// A Formatter for Chroma lexers.
type Formatter interface {
        // Format returns a formatting function for tokens.
        //
        // If the iterator panics, the Formatter should recover.
        Format(w io.Writer, style *Style, iterator Iterator) error
}

// A FormatterFunc is a Formatter implemented as a function.
//
// Guards against iterator panics.
type FormatterFunc func(w io.Writer, style *Style, iterator Iterator) error

func (f FormatterFunc) Format(w io.Writer, s *Style, it Iterator) (err error) { // nolint
        defer func() {
                if perr := recover(); perr != nil {
                        err = perr.(error)
                }
        }()
        return f(w, s, it)
}

type recoveringFormatter struct {
        Formatter
}

func (r recoveringFormatter) Format(w io.Writer, s *Style, it Iterator) (err error) {
        defer func() {
                if perr := recover(); perr != nil {
                        err = perr.(error)
                }
        }()
        return r.Formatter.Format(w, s, it)
}

// RecoveringFormatter wraps a formatter with panic recovery.
func RecoveringFormatter(formatter Formatter) Formatter { return recoveringFormatter{formatter} }