68 lines
1.2 KiB
Go
68 lines
1.2 KiB
Go
// Copyright (c) 2024 Celestino Amoroso (celestino.amoroso@gmail.com).
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// All rights reserved.
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// formatter.go
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package expr
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import "fmt"
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type FmtOpt uint16
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const (
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TTY FmtOpt = 1 << iota
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MultiLine
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Truncate
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Base2
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Base8
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Base10
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Base16
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)
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const (
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TruncateEllipsis = "(...)"
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MinTruncateSize = 10
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TruncateSize = MinTruncateSize + 15
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)
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func TruncateString(s string) (trunc string) {
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finalPart := len(s) - (MinTruncateSize - len(TruncateEllipsis))
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trunc = s[0:len(s)-MinTruncateSize] + TruncateEllipsis + s[finalPart:]
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return
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}
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type Formatter interface {
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ToString(options FmtOpt) string
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}
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func getFormatted(v any, opt FmtOpt) (text string) {
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if v == nil {
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text = "(nil)"
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} else if s, ok := v.(string); ok {
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text = s
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} else if formatter, ok := v.(Formatter); ok {
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text = formatter.ToString(opt)
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} else {
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text = fmt.Sprintf("%v", v)
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}
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return
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}
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type Typer interface {
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TypeName() string
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}
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func typeName(v any) (name string) {
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if v == nil {
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name = "nil"
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} else if typer, ok := v.(Typer); ok {
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name = typer.TypeName()
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} else if IsInteger(v) {
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name = "integer"
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} else if IsFloat(v) {
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name = "float"
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} else {
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name = fmt.Sprintf("%T", v)
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}
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return
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}
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