go-eol/readcr.go

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package eol
import (
"io"
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"sourcecode.social/reiver/go-opt"
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"sourcecode.social/reiver/go-eol/cr"
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)
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// ReadCR tries to read the "\r" (i.e., carriage-return) end-of-line sequence.
//
// If successful, it returns the number-of-bytes read (to read in end-of-line sequence "\r").
//
// If the character read is not a '\r', then ReadCR will try to unread the character.
//
// Example usage:
//
// size, err := eol.ReadCR(runescanner)
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func ReadCR(runescanner io.RuneScanner) (size int, err error) {
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const characterNumber uint64 = 1
var circumstance internalCircumstance = specifyCircumstance(opt.Something(CR), characterNumber)
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return readthisrune(circumstance, runescanner, cr.Rune)
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}