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Code Issues

🗑 Remove IConvertible extension methods

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Fully resolves #13
This commit is contained in:
Oliver Booth 2021-01-14 18:31:16 +00:00
parent b7514fdead
commit f7664ba8a8
2 changed files with 0 additions and 219 deletions
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58
X10D.Tests/src/Core/ConvertibleTests.cs
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@ -1,58 +0,0 @@
namespace X10D.Tests.Core
{
using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
/// <summary>
/// Tests for <see cref="ConvertibleExtensions" />.
/// </summary>
[TestClass]
public class ConvertibleTests
{
/// <summary>
/// Tests for <see cref="ConvertibleExtensions.To{T}" />.
/// </summary>
[TestMethod]
public void To()
{
Assert.AreEqual(2, "2".To<int>());
Assert.AreEqual("12.5", 12.50.To<string>());
Assert.IsTrue("True".To<bool>());
}
/// <summary>
/// Tests for <see cref="ConvertibleExtensions.ToOrDefault{T}(System.IConvertible, System.IFormatProvider)" />.
/// </summary>
[TestMethod]
public void ToOrDefault()
{
Assert.AreEqual(2, "2".ToOrDefault<int>());
Assert.AreEqual("12.5", 12.50.ToOrDefault<string>());
Assert.IsTrue("True".ToOrDefault<bool>());
Assert.ThrowsException<FormatException>(() => "Foo".ToOrDefault<double>());
Assert.IsTrue("1.5".ToOrDefault(out float f));
Assert.AreEqual(1.5f, f);
}
/// <summary>
/// Tests for <see cref="ConvertibleExtensions.ToOrNull{T}(System.IConvertible, System.IFormatProvider)" />.
/// </summary>
[TestMethod]
public void ToOrNull()
{
Assert.IsFalse("foo".ToOrNull(out ConvertibleTests t));
Assert.IsNull(t);
}
/// <summary>
/// Tests for <see cref="ConvertibleExtensions.ToOrOther{T}(System.IConvertible, T, System.IFormatProvider)" />.
/// </summary>
[TestMethod]
public void ToOrOther()
{
Assert.AreEqual(2.0, "Foo".ToOrOther(2.0));
Assert.IsFalse("Foo".ToOrOther(out var d, 2.0));
Assert.AreEqual(2.0, d);
}
}
}

161
X10D/src/ConvertibleExtensions.cs
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@ -1,161 +0,0 @@
namespace X10D
{
using System;
/// <summary>
/// Extension methods for <see cref="IConvertible" />.
/// </summary>
public static class ConvertibleExtensions
{
/// <summary>
/// Converts the object to another type.
/// </summary>
/// <typeparam name="T">The type to convert to.</typeparam>
/// <param name="value">The object to convert.</param>
/// <param name="provider">An object that supplies culture-specific formatting information.</param>
/// <returns>Returns the value converted to <see cref="T" />.</returns>
/// <exception cref="InvalidCastException">
/// This conversion is not supported.
/// -or-
/// <paramref name="value" /> is <see langword="null" /> and <typeparamref name="T" /> is a value type.
/// </exception>
[CLSCompliant(false)]
public static T To<T>(this IConvertible value, IFormatProvider provider = null)
{
if (value is null)
{
return default;
}
return (T)Convert.ChangeType(value, typeof(T), provider);
}
/// <summary>
/// Converts the object to another type, returning the default value on failure.
/// </summary>
/// <typeparam name="T">The type to convert to.</typeparam>
/// <param name="value">The object to convert.</param>
/// <param name="provider">The format provider.</param>
/// <returns>Returns the value converted to <see cref="T" />.</returns>
/// <exception cref="InvalidCastException">This conversion is not supported.</exception>
[CLSCompliant(false)]
public static T ToOrDefault<T>(this IConvertible value, IFormatProvider provider = null)
{
return value is null ? default : To<T>(value, provider);
}
/// <summary>
/// Converts the object to another type, returning the default value on failure.
/// </summary>
/// <typeparam name="T">The type to convert to.</typeparam>
/// <param name="value">The object to convert.</param>
/// <param name="newObj">The parameter where the result should be sent.</param>
/// <param name="provider">An object that supplies culture-specific formatting information.</param>
/// <returns>Returns <see langword="true" /> on success, <see langword="true" /> on failure.</returns>
[CLSCompliant(false)]
public static bool ToOrDefault<T>(this IConvertible value, out T newObj, IFormatProvider provider = null)
{
if (value is null)
{
newObj = default;
return false;
}
try
{
newObj = To<T>(value, provider);
return true;
}
catch (InvalidCastException)
{
newObj = default;
return false;
}
}
/// <summary>
/// Converts the object to another type, returning <see langword="null" /> on failure.
/// </summary>
/// <typeparam name="T">The type to convert to.</typeparam>
/// <param name="value">The object to convert.</param>
/// <param name="provider">An object that supplies culture-specific formatting information.</param>
/// <returns>Returns a <see cref="T" /> or <see langword="null" />.</returns>
[CLSCompliant(false)]
public static T ToOrNull<T>(this IConvertible value, IFormatProvider provider = null)
where T : class
{
return value.ToOrNull(out T v, provider) ? v : null;
}
/// <summary>
/// Converts the object to another type, returning <see langword="null" /> on failure.
/// </summary>
/// <typeparam name="T">The type to convert to.</typeparam>
/// <param name="value">The object to convert.</param>
/// <param name="newObj">The parameter where the result should be sent.</param>
/// <param name="provider">An object that supplies culture-specific formatting information.</param>
/// <returns>Returns a <see cref="T" /> or <see langword="null" />.</returns>
[CLSCompliant(false)]
public static bool ToOrNull<T>(this IConvertible value, out T newObj, IFormatProvider provider = null)
where T : class
{
return ToOrOther(value, out newObj, null, provider);
}
/// <summary>
/// Converts the object to another type, returning a different value on failure.
/// </summary>
/// <typeparam name="T">The type to convert to.</typeparam>
/// <param name="value">The object to convert.</param>
/// <param name="other">The backup value.</param>
/// <param name="provider">An object that supplies culture-specific formatting information.</param>
/// <returns>Returns the value converted to <see cref="T" />.</returns>
[CLSCompliant(false)]
public static T ToOrOther<T>(this IConvertible value, T other, IFormatProvider provider = null)
{
if (value is null)
{
return other;
}
try
{
return To<T>(value, provider);
}
catch (Exception ex) when (ex is InvalidCastException || ex is FormatException)
{
return other;
}
}
/// <summary>
/// Converts the object to another type, returning a different value on failure.
/// </summary>
/// <typeparam name="T">The type to convert to.</typeparam>
/// <param name="value">The object to convert.</param>
/// <param name="newObj">The parameter where the result should be sent.</param>
/// <param name="other">The backup value.</param>
/// <param name="provider">An object that supplies culture-specific formatting information.</param>
/// <returns>Returns <see langword="true" /> on success, <see langword="true" /> on failure.</returns>
[CLSCompliant(false)]
public static bool ToOrOther<T>(this IConvertible value, out T newObj, T other, IFormatProvider provider = null)
{
if (value is null)
{
newObj = other;
return false;
}
try
{
newObj = To<T>(value, provider);
return true;
}
catch (Exception ex) when (ex is InvalidCastException || ex is FormatException)
{
newObj = other;
return false;
}
}
}
}