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path: root/vendor/github.com/naoina/toml/error.go
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package toml

import (
    "errors"
    "fmt"
    "reflect"
    "strconv"
)

var (
    errArrayMultiType = errors.New("array can't contain multiple types")
)

// LineError is returned by Unmarshal, UnmarshalTable and Parse
// if the error is local to a line.
type LineError struct {
    Line        int
    StructField string
    Err         error
}

func (err *LineError) Error() string {
    field := ""
    if err.StructField != "" {
        field = "(" + err.StructField + ") "
    }
    return fmt.Sprintf("line %d: %s%v", err.Line, field, err.Err)
}

func lineError(line int, err error) error {
    if err == nil {
        return nil
    }
    if _, ok := err.(*LineError); ok {
        return err
    }
    return &LineError{Line: line, Err: err}
}

func lineErrorField(line int, field string, err error) error {
    if lerr, ok := err.(*LineError); ok {
        return lerr
    } else if err != nil {
        err = &LineError{Line: line, StructField: field, Err: err}
    }
    return err
}

type overflowError struct {
    kind reflect.Kind
    v    string
}

func (err *overflowError) Error() string {
    return fmt.Sprintf("value %s is out of range for %v", err.v, err.kind)
}

func convertNumError(kind reflect.Kind, err error) error {
    if numerr, ok := err.(*strconv.NumError); ok && numerr.Err == strconv.ErrRange {
        return &overflowError{kind, numerr.Num}
    }
    return err
}

type invalidUnmarshalError struct {
    typ reflect.Type
}

func (err *invalidUnmarshalError) Error() string {
    if err.typ == nil {
        return "toml: Unmarshal(nil)"
    }
    if err.typ.Kind() != reflect.Ptr {
        return "toml: Unmarshal(non-pointer " + err.typ.String() + ")"
    }
    return "toml: Unmarshal(nil " + err.typ.String() + ")"
}

type unmarshalTypeError struct {
    what string
    want string
    typ  reflect.Type
}

func (err *unmarshalTypeError) Error() string {
    msg := fmt.Sprintf("cannot unmarshal TOML %s into %s", err.what, err.typ)
    if err.want != "" {
        msg += " (need " + err.want + ")"
    }
    return msg
}

type marshalNilError struct {
    typ reflect.Type
}

func (err *marshalNilError) Error() string {
    return fmt.Sprintf("toml: cannot marshal nil %s", err.typ)
}

type marshalTableError struct {
    typ reflect.Type
}

func (err *marshalTableError) Error() string {
    return fmt.Sprintf("toml: cannot marshal %s as table, want struct or map type", err.typ)
}