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Localization (parsing, formatting) of numbers, dates/time/calendar, units of measure, messages and lists. Includes localized collation.
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lib/localize/exception/unit_conversion_error.ex
defmodule Localize.UnitConversionError do
@moduledoc """
Exception raised when a unit conversion cannot be performed.
This may occur because the units are not convertible, the unit
requires a special conversion that is not supported, or the
conversion involves mixed units.
"""
defexception [:from, :to, :reason]
@impl true
def exception(bindings) when is_list(bindings) do
struct!(__MODULE__, bindings)
end
@impl true
def message(%__MODULE__{from: from, to: to, reason: :not_convertible}) do
Localize.Exception.safe_message(
"unit",
"Units {$from} and {$to} are not convertible.",
from: inspect(from),
to: inspect(to)
)
end
def message(%__MODULE__{from: from, reason: :special_conversion}) do
Localize.Exception.safe_message(
"unit",
"Special conversion is not supported for {$from}.",
from: inspect(from)
)
end
def message(%__MODULE__{reason: :mixed_units}) do
Localize.Exception.safe_message(
"unit",
"Cannot compute conversion factor for mixed units."
)
end
def message(%__MODULE__{from: from, to: to}) do
Localize.Exception.safe_message(
"unit",
"Cannot convert from {$from} to {$to}.",
from: inspect(from),
to: inspect(to)
)
end
end