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go-spew
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revert previous mis-commits, add ability to allow deeper pretty-printing after an error or Stringer interface is encountered.

This commit is contained in:
Thomas NJ Shadwell 2013-02-26 19:43:45 +00:00
parent 3e74359719
commit f948516369
2 changed files with 22 additions and 33 deletions
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15
spew/common.go
View File

@ -150,11 +150,26 @@ func handleMethods(cs *ConfigState, w io.Writer, v reflect.Value) (handled bool)
switch iface := viface.(type) {
case error:
defer catchPanic(w, v)
if cs.ContinueOnMethod {
w.Write(append(openParenBytes, []byte(iface.Error())...))
w.Write(closeParenBytes)
w.Write(spaceBytes)
return false
}
w.Write([]byte(iface.Error()))
return true
case fmt.Stringer:
defer catchPanic(w, v)
if cs.ContinueOnMethod {
w.Write(append(openParenBytes, []byte(iface.String())...))
w.Write(closeParenBytes)
w.Write(spaceBytes)
return false
}
w.Write([]byte(iface.String()))
return true
}

40
spew/config.go
View File

@ -62,6 +62,13 @@ type ConfigState struct {
// interface with a pointer receiver should not be mutating their state
// inside these interface methods.
DisablePointerMethods bool
//ContinueOnMethod specifies whether recursion should stop once
//a Stringer or an error interface is encountered.
//
//It defaults to false, meaning that it does not pretty-print
//the internals of Stringers or errors.
ContinueOnMethod bool
}
// Config is the active configuration of the top-level functions.
@ -151,39 +158,6 @@ func (c *ConfigState) Println(a ...interface{}) (n int, err error) {
return fmt.Println(c.convertArgs(a)...)
}
// Sprint is a wrapper for fmt.Sprint that treats each argument as if it were
// passed with a Formatter interface returned by c.NewFormatter. It returns
// the resulting string. See NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Sprint(c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Sprint(a ...interface{}) string {
return fmt.Sprint(c.convertArgs(a)...)
}
// Sprintf is a wrapper for fmt.Sprintf that treats each argument as if it were
// passed with a Formatter interface returned by c.NewFormatter. It returns
// the resulting string. See NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Sprintf(format, c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Sprintf(format string, a ...interface{}) string {
return fmt.Sprintf(format, c.convertArgs(a)...)
}
// Sprintln is a wrapper for fmt.Sprintln that treats each argument as if it
// were passed with a Formatter interface returned by c.NewFormatter. It
// returns the resulting string. See NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Sprintln(c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Sprintln(a ...interface{}) string {
return fmt.Sprintln(c.convertArgs(a)...)
}
/*
NewFormatter returns a custom formatter that satisfies the fmt.Formatter
interface. As a result, it integrates cleanly with standard fmt package