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package tag
import (
"fmt"
"math"
"time"
"github.com/BurntSushi/toml/internal"
)
// Add JSON tags to a data structure as expected by toml-test.
func Add(key string, tomlData any) any {
// Switch on the data type.
switch orig := tomlData.(type) {
default:
panic(fmt.Sprintf("Unknown type: %T", tomlData))
// A table: we don't need to add any tags, just recurse for every table
// entry.
case map[string]any:
typed := make(map[string]any, len(orig))
for k, v := range orig {
typed[k] = Add(k, v)
}
return typed
// An array: we don't need to add any tags, just recurse for every table
// entry.
case []map[string]any:
typed := make([]map[string]any, len(orig))
for i, v := range orig {
typed[i] = Add("", v).(map[string]any)
}
return typed
case []any:
typed := make([]any, len(orig))
for i, v := range orig {
typed[i] = Add("", v)
}
return typed
// Datetime: tag as datetime.
case time.Time:
switch orig.Location() {
default:
return tag("datetime", orig.Format("2006-01-02T15:04:05.999999999Z07:00"))
case internal.LocalDatetime:
return tag("datetime-local", orig.Format("2006-01-02T15:04:05.999999999"))
case internal.LocalDate:
return tag("date-local", orig.Format("2006-01-02"))
case internal.LocalTime:
return tag("time-local", orig.Format("15:04:05.999999999"))
}
// Tag primitive values: bool, string, int, and float64.
case bool:
return tag("bool", fmt.Sprintf("%v", orig))
case string:
return tag("string", orig)
case int64:
return tag("integer", fmt.Sprintf("%d", orig))
case float64:
switch {
case math.IsNaN(orig):
return tag("float", "nan")
case math.IsInf(orig, 1):
return tag("float", "inf")
case math.IsInf(orig, -1):
return tag("float", "-inf")
default:
return tag("float", fmt.Sprintf("%v", orig))
}
}
}
func tag(typeName string, data any) map[string]any {
return map[string]any{
"type": typeName,
"value": data,
}
}
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