using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"[^\\](?:(?:\\{2})*)\$(?:(?:[=|-]?([A-Z0-9_]*[A-Z_]+[A-Z0-9_]*)|(?:{[=|-]?([A-Z0-9_]*[A-Z_]+[A-Z0-9_]*)})))";
string input = @"${HAVE_ERROR}
\\${PATH}
\\$SHELL
\\\\${PATH}
${HTTP_PORT}
$HTTP_PORT
$PORT
$1_PORT
${1_PORT}
$PORT_345
${PORT_345}
${AZK_AGENT_CONF_FILE}
${HTTP_HOST_2345}
${=HTTP_HOST_2345}
${-HTTP_HOST_2345}
$ENV.HTTP
# ^ should match
# v should not match
any_text
LIKE_A_ENV_NAME
\${PATH}
\$SHELL
\ \${PATH}
\ \$SHELL
\\\${PATH}
\\\$SHELL
$1
${1}
$@
$?
${env}
${env.io}
${ENV
${ENV_hahaha}
${ENV.HTTP}
$envs.HTTP_PORT
${envs.HTTP_PORT}
${-net.host}
${-net.port.http}
${=net.port.http}
<%azk.default_domain%>
<%=manifest.dir%>
#{-system.name}
#{=manifest.dir}
#{azk}
#{azk.io}
##hello
$hello
%hello%
<hello>";
foreach (Match m in Regex.Matches(input, pattern))
{
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