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31 lines
581 B
31 lines
581 B
4 years ago
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package log
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import (
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"runtime"
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"strconv"
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"strings"
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)
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// Valuer is returns a log value.
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type Valuer func() interface{}
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// Value return the function value.
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func Value(v interface{}) interface{} {
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if v, ok := v.(Valuer); ok {
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return v()
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}
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return v
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}
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// Caller returns returns a Valuer that returns a pkg/file:line description of the caller.
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func Caller(depth int) Valuer {
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return func() interface{} {
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_, file, line, ok := runtime.Caller(depth)
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if !ok {
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return nil
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}
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idx := strings.LastIndexByte(file, '/')
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return file[idx+1:] + ":" + strconv.Itoa(line)
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}
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}
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