$s1 = @'
string Txt = "hello";
string Name = "world";

public static void func1(string s) {
	Console.WriteLine(s);
	out(1);
}

public static void out(object x)
{
	Console.WriteLine(x.ToString());
}
'@
<# 变量$s1经过addPubText函数处理后, 最后要得到的结果如下: 
public static void Main(){
string Txt = "hello";
string Name = "world";
}

public static void func1(string s) {
	Console.WriteLine(s);
	out(1);
}

public static void out(object x)
{
	Console.WriteLine(x.ToString());
}
#>

$s2 = @'
public static void func1(string s)
{
	Console.WriteLine(s);
	out(1);
}

public static void out(object x) { Console.WriteLine(x.ToString()); }

string Txt = "hello";
string Name = "world";
'@
<# 变量$s2经过addPubText函数处理后, 最后要得到的结果如下: 
public static void func1(string s)
{
	Console.WriteLine(s);
	out(1);
}

public static void out(object x) { Console.WriteLine(x.ToString()); }

public static void Main(){
string Txt = "hello";
string Name = "world";
}
#>
复制代码

function addPubText
{
	param (
		[string]$text
	)
	
	$mainFunction = "public static void Main()`r`n{`r`n"
	$closingBrace = "`r`n}`r`n"
	
	# 功能A: 检查第一个 public 函数定义前的非函数文本
	if ($text -match '^(.*?)\s*public\s+.*?\s*\(.*?\)\s*{')
	{
		$beforePublic = $matches[1].Trim()
		if ($beforePublic)
		{
			$text = $mainFunction + $beforePublic + $closingBrace + $text
			return $text
		}
	}
	
	# 功能B: 检查最后一个 public 函数定义后的非函数文本
	if ($text -match 'public\s+.*?\s*\(.*?\)\s*{.*?}([\s\S]*)$')
	{
		$afterPublic = $matches[1].Trim()
		if ($afterPublic)
		{
			$text = $text + $mainFunction + $afterPublic + $closingBrace
			return $text
		}
	}
	
	return ""
}
# 调用函数
$result1 = addPubText $s1
$result2 = addPubText $s2

# 输出结果
$result1
$result2
复制代码

function Add-PubText {
	param (
		[ValidateNotNullOrEmpty()]
		[string]$text
	)
	$reMethod = [regex]'(?ms)^(?>\s*)public\b[^(]*\b\w+\b(?>\s*)\((?>[^)]*)\)(?>[^{]*)(?<o>\{)(?>/\*.*?\*/|//[^\n]*|"(?>""|\\"|[^"])*"|(?<o>\{)|(?<-o>\})|.)+?(?(o)!)\s*'
	$ms = $reMethod.Matches($text)
	if ($ms.Count -eq 0) { return '' }
	$prefix = $text.Substring(0, $ms[0].Index)
	$suffix = $text.Substring($ms[0].Index)
	if ($prefix -match '\S') {
		$prefix = @"
public static void Main()
{
$prefix
}
"@
		return $prefix + $suffix
	}
	$t = $ms[$ms.Count - 1].Index + $ms[$ms.Count - 1].Length
	$prefix = $text.Substring(0, $t)
	$suffix = $text.Substring($t)
	if ($suffix -match '\S') {
		$suffix = @"
public static void Main()
{
$suffix
}
"@
		return $prefix + $suffix
	}
	return ''
}
Add-PubText $s1
Add-PubText $s2
复制代码