@@ -3,12 +3,19 @@ package errs
33import (
44 "errors"
55 "fmt"
6+ "io"
67 "runtime"
78 "strings"
89
910 "github.com/domonda/go-pretty"
1011)
1112
13+ // CallStackPrintable can be implemented to customize the printing
14+ // of the implementation's data in an error call stack output.
15+ type CallStackPrintable interface {
16+ PrintForCallStack (io.Writer )
17+ }
18+
1219func formatError (err error ) string {
1320 var (
1421 firstWithoutStack error
@@ -70,17 +77,25 @@ func formatCallStackParams(e callStackParamsProvider) string {
7077}
7178
7279// FormatFunctionCall formats a function call in pseudo syntax
73- // using github.com/domonda/go-pretty to format the params.
74- // Used to format errors with function call stack information.
75- func FormatFunctionCall (function string , params ... any ) string {
80+ // using the PrintForCallStack method of params that implement
81+ // the CallStackPrintable interface or github.com/domonda/go-pretty
82+ // to format params that don't implement CallStackPrintable.
83+ //
84+ // FormatFunctionCall is a function variable that can be changed
85+ // to globally configure the formatting of function calls.
86+ var FormatFunctionCall = func (function string , params ... any ) string {
7687 var b strings.Builder
7788 b .WriteString (function )
7889 b .WriteByte ('(' )
7990 for i , param := range params {
8091 if i > 0 {
8192 b .WriteString (", " )
8293 }
83- pretty .Fprint (& b , param )
94+ if printable , ok := param .(CallStackPrintable ); ok {
95+ printable .PrintForCallStack (& b )
96+ } else {
97+ pretty .Fprint (& b , param )
98+ }
8499 }
85100 b .WriteByte (')' )
86101 return b .String ()
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