using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^\s*(add|and|nor|or|sub)\s*(\$[a-z0-9]{2,4}),\s*(\$[a-z0-9]{2,4}),\s*(\$[a-z0-9]{2,4})\s*$";
string input = @"add $t3,$s3,$s5
add $t3,$s3,$s5
add $v0,$t0,$t0
add $v0,$t0,$t0
and $t2,$t3,$t4
and $t2,$t3,$t4
nor $s0,$s5,$s2
nor $s0,$s5,$s2
or $s0,$s0,$s1
or $s0,$s0,$s1
or $s0,$s2,$s5
or $s0,$s2,$s5
sub $s3,$t0,$t1
sub $s3,$t0,$t1
sub $t0,$zero,$t1
sub $t0,$zero,$t1
sub $t1,$t4,$t8
sub $t1,$t4,$t8";
RegexOptions options = RegexOptions.Multiline;
foreach (Match m in Regex.Matches(input, pattern, options))
{
Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
}
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx