Исходники и презентации

lessons/errors/constant_error/main.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"io"
+)
+
+type Error string
+
+func (e Error) Error() string {
+	return string(e)
+}
+
+const ErrEOF = Error("EOF")
+
+func main() {
+	var err error = ErrEOF
+	err = io.EOF
+	_ = err
+
+	// ErrEOF = Error("new error") -> coplilation error
+
+	anotherErrEOF1 := Error("EOF")
+	fmt.Println(`anotherErrEOF1 = Error("EOF"):`, anotherErrEOF1 == ErrEOF)
+
+	anotherErrEOF2 := errors.New("EOF")
+	fmt.Println("anotherErrEOF2 = io.EOF:", anotherErrEOF2 == io.EOF)
+}