Regex'ing code functions - multiline?

**Maate** · Apr 26 '07, 08:15 AM

Re: Regex'ing code functions - multiline?

Hvis du bruger dotnet kan du bruge RegexOptions.Mu ltiline, jf:

Regex.Match(inp utstreng, regex, RegexOptions.Mu ltiline)

- ellers (?m:), fx:

(?m:etregulærtu dtryk)

Vh. Morten

On 25 Apr., 21:42, Masa Ito <masa...@masait o.comwrote:

I am trying to capture the contents of a function with Regex. I am using
Expresso to test (nice - thanks for the great tool UltraPico!). I can
handle my own with single line regex's (I think).. I want to have a
named capture of the entire 'contents' of specific functions.
EG: Sample code
<Description("{ 0} is a required field.")_
Protected Overridable Function AccountIDRequir ed(ByVal target As
Object, ByVal e As RuleArgs) As Boolean
Return mAccountID.ToSt ring.Length 0
End Function
>
I know the function name, and can easily match the first line:
Protected\sOver ridable\sFuncti on\sAccountIDRe quired.*
>
But the .* doesn't capture the newlines (/n). I want to capture
everything up to the End Function, so figured I could do something like:
(Protected\sOve rridable\sFunct ion\sAccountIDR equired.*End\sF unction)
>
If I know that it is always 3 lines (like the example) I could do:
Protected\sOver ridable\sFuncti on\sAccountIDRe quired.*\n.*\n. *
>
this matches my test perfectly, but I need it to match as many lines as
necessary until the End Function.
>
Can anyone help?
>
TIA!

**Peter Macej** · Apr 26 '07, 08:45 AM

Re: Regex'ing code functions - multiline?

But the .* doesn't capture the newlines (/n). I want to capture

Use (.|\n)*

(Protected\sOve rridable\sFunct ion\sAccountIDR equired.*End\sF unction)
this matches my test perfectly, but I need it to match as many lines as
necessary until the End Function.

Try something like:
(Protected\sOve rridable\sFunct ion\sAccountIDR equired(.|\n)*E nd\sFunction)

Remember that this regex doesn't match if the function is defined like
(split lines with _):
Protected Overridable _
Function AccountIDRequir ed(ByVal target As Object, ByVal e As RuleArgs)
As Boolean

If you need to parse the method inside VS, I would use VS automation
(macro or add-in). Create following two macros and call test() macro.
This will do what you want:
Sub test()
Dim ce As CodeElement
For Each ce In
DTE.ActiveDocum ent.ProjectItem .FileCodeModel. CodeElements
traverse(ce)
Next
End Sub

Sub traverse(ByVal ce As CodeElement)
If ce.Kind = vsCMElement.vsC MElementFunctio n Then
If ce.Name = "AccountIDRequi red" Then
Dim cme As CodeFunction = CType(ce, CodeFunction)

MsgBox(cme.Star tPoint.CreateEd itPoint.GetText (cme.EndPoint.C reateEditPoint) )
' use properties of cme to investigate the method further
End If
ElseIf ce.IsCodeType Then
Dim tce As CodeType = CType(ce, CodeType)
Dim subCe As CodeElement
For Each subCe In tce.Members
traverse(subCe)
Next
End If
End Sub

See http://www.helixoft.com/blog/archives/6 how to create macro.

<Description("{ 0} is a required field.")_
Protected Overridable Function AccountIDRequir ed(ByVal target As

Just out of curiosity, what do you use <Descriptionatt ribute at method
for? It has practical meaning only for properties and assemblies.
Properties with <Descriptionatt ribute will show this description in
Properties window. Not methods. To have IntelliSense tooltips and Object
browser description, you need to use XML comments (<summary>, <param>,
etc.) instead, see http://tinyurl.com/ywtomx

Regards

--
Peter Macej
Helixoft - http://www.helixoft.com
VSdocman - Commenter and generator of class documentation for C#, VB
..NET and ASP .NET code

**Masa Ito** · Apr 27 '07, 12:35 AM

Re: Regex'ing code functions - multiline?

Peter Macej <peter@helixoft .comwrote in
news:uyMmB39hHH A.3512@TK2MSFTN GP06.phx.gbl:

>But the .* doesn't capture the newlines (/n). I want to capture

>
Use (.|\n)*
>

>(Protected\sOv erridable\sFunc tion\sAccountID Required.*End\s Function)
>this matches my test perfectly, but I need it to match as many lines
>as necessary until the End Function.

>
Try something like:
(Protected\sOve rridable\sFunct ion\sAccountIDR equired(.|\n)*E nd\sFunctio
n)

Interesting - thanks - I will give this a try. I haven't seen that
syntax before. I actually noticed the 'single line' option description
in Expresso describes it as 'make . match \n as well as any other
character' - which is exactly what I had wanted. For some reason, I had
thought the opposite - that Singleline would not match line breaks - go
figure!?

Remember that this regex doesn't match if the function is defined like
(split lines with _):
Protected Overridable _
Function AccountIDRequir ed(ByVal target As Object, ByVal e As
RuleArgs) As Boolean
>
If you need to parse the method inside VS, I would use VS automation
(macro or add-in). Create following two macros and call test() macro.
This will do what you want:
Sub test()
Dim ce As CodeElement
For Each ce In
DTE.ActiveDocum ent.ProjectItem .FileCodeModel. CodeElements
traverse(ce)
Next
End Sub
>
Sub traverse(ByVal ce As CodeElement)
If ce.Kind = vsCMElement.vsC MElementFunctio n Then
If ce.Name = "AccountIDRequi red" Then
Dim cme As CodeFunction = CType(ce, CodeFunction)
>
MsgBox(cme.Star tPoint.CreateEd itPoint.GetText (cme.EndPoint.C reateEditPo
int))
' use properties of cme to investigate the method
further
End If
ElseIf ce.IsCodeType Then
Dim tce As CodeType = CType(ce, CodeType)
Dim subCe As CodeElement
For Each subCe In tce.Members
traverse(subCe)
Next
End If
End Sub
See http://www.helixoft.com/blog/archives/6 how to create macro.

That is a great idea - for some reason I hadn't even thought about
macros/programming in vs.

I ended up getting my code to do work great - I am upgrading a very large
CSLA based app from 1.5 to 2.1, and this section of code updated
thousands of validation rules for me ... :)

<Description("{ 0} is a required field.")_
Protected Overridable Function AccountIDRequir ed(ByVal target As

Just out of curiosity, what do you use <Descriptionatt ribute at
method for? It has practical meaning only for properties and
assemblies. Properties with <Descriptionatt ribute will show this
description in Properties window. Not methods. To have IntelliSense
tooltips and Object browser description, you need to use XML comments
(<summary>, <param>, etc.) instead, see http://tinyurl.com/ywtomx

This is used in the validation/error text - when a rule is broken this
text is displayed to the end user in the UI.

Thanks a ton for your help and ideas!

Masa