public static async Task <Regex> GetRegexAsync(RegexEngine engine, string pattern, RegexOptions?options = null, TimeSpan?matchTimeout = null)
{
if (options is null)
{
Assert.Null(matchTimeout);
}
switch (engine)
{
case RegexEngine.Interpreter:
return
(options is null ? new Regex(pattern) :
matchTimeout is null ? new Regex(pattern, options.Value) :
new Regex(pattern, options.Value, matchTimeout.Value));
case RegexEngine.Compiled:
return
(options is null ? new Regex(pattern, RegexOptions.Compiled) :
matchTimeout is null ? new Regex(pattern, options.Value | RegexOptions.Compiled) :
new Regex(pattern, options.Value | RegexOptions.Compiled, matchTimeout.Value));
case RegexEngine.SourceGenerated:
return(await RegexGeneratorHelper.SourceGenRegexAsync(pattern, options, matchTimeout));
}
throw new ArgumentException($"Unknown engine: {engine}");
}
public static async Task <Regex> GetRegexAsync(RegexEngine engine, [StringSyntax(StringSyntaxAttribute.Regex)] string pattern, RegexOptions options, Globalization.CultureInfo culture)
{
if (engine == RegexEngine.SourceGenerated)
{
return(await RegexGeneratorHelper.SourceGenRegexAsync(pattern, culture, options));
}
using (new System.Tests.ThreadCultureChange(culture))
{
return(await GetRegexAsync(engine, pattern, options));
}
}
public async Task Diagnostic_InvalidRegexPattern(string pattern)
{
IReadOnlyList<Diagnostic> diagnostics = await RegexGeneratorHelper.RunGenerator($@"
using System.Text.RegularExpressions;
partial class C
{{
[RegexGenerator({pattern})]
private static partial Regex InvalidPattern();
}}
");
Assert.Equal("SYSLIB1042", Assert.Single(diagnostics).Id);
}
public async Task Diagnostic_MultipleAttributes()
{
IReadOnlyList<Diagnostic> diagnostics = await RegexGeneratorHelper.RunGenerator(@"
using System.Text.RegularExpressions;
partial class C
{
[RegexGenerator(""ab"")]
[RegexGenerator(""abc"")]
private static partial Regex MultipleAttributes();
}
");
Assert.Equal("SYSLIB1041", Assert.Single(diagnostics).Id);
}
public async Task Diagnostic_MalformedCtor(string attribute)
{
// Validate the generator doesn't crash with an incomplete attribute
IReadOnlyList<Diagnostic> diagnostics = await RegexGeneratorHelper.RunGenerator($@"
using System.Text.RegularExpressions;
partial class C
{{
{attribute}
private static partial Regex MultipleAttributes();
}}
");
if (diagnostics.Count != 0)
{
Assert.Contains(Assert.Single(diagnostics).Id, new[] { "SYSLIB1040", "SYSLIB1042" });
}
}
