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terminal: show message if there are no vars/locals/args

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When the vars, locals, or args commands return no results, nothing is

printed out to the terminal. This commit makes these commands print a

message like `(no locals)` when there is nothing to show. This feedback

is more descriptive of what is being returned than an empty string.
This commit is contained in:
Wesley Merkel
2016-04-06 09:26:10 -07:00
committed by Derek Parker
parent ae7abe1a9d
commit e60942a39d
2 changed files with 21 additions and 4 deletions
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13
terminal/command.go
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@ -682,7 +682,7 @@ func args(t *Term, ctx callContext, filter string) ([]string, error) {
if err != nil {
return nil, err
}
return filterVariables(vars, filter), nil
return describeNoVars("args", filterVariables(vars, filter)), nil
}
func locals(t *Term, ctx callContext, filter string) ([]string, error) {
@ -690,7 +690,7 @@ func locals(t *Term, ctx callContext, filter string) ([]string, error) {
if err != nil {
return nil, err
}
return filterVariables(locals, filter), nil
return describeNoVars("locals", filterVariables(locals, filter)), nil
}
func vars(t *Term, ctx callContext, filter string) ([]string, error) {
@ -698,7 +698,7 @@ func vars(t *Term, ctx callContext, filter string) ([]string, error) {
if err != nil {
return nil, err
}
return filterVariables(vars, filter), nil
return describeNoVars("vars", filterVariables(vars, filter)), nil
}
func regs(t *Term, ctx callContext, args string) error {
@ -1153,3 +1153,10 @@ func formatBreakpointLocation(bp *api.Breakpoint) string {
}
return fmt.Sprintf("%#v for %s:%d", bp.Addr, p, bp.Line)
}
func describeNoVars(varType string, data []string) []string {
if len(data) == 0 {
return []string{fmt.Sprintf("(no %s)", varType)}
}
return data
}