\b
置換する単語の前後にマーカー (単語境界用)を含むパターンを使用して、正規表現で置換できます。
Public Function RegExpReplaceWord(ByVal strSource As String, _
ByVal strFind As String, _
ByVal strReplace As String) As String
' Purpose : replace [strFind] with [strReplace] in [strSource]
' Comment : [strFind] can be plain text or a regexp pattern;
' all occurences of [strFind] are replaced
' early binding requires reference to Microsoft VBScript
' Regular Expressions:
'Dim re As RegExp
'Set re = New RegExp
' with late binding, no reference needed:
Dim re As Object
Set re = CreateObject("VBScript.RegExp")
re.Global = True
're.IgnoreCase = True ' <-- case insensitve
re.pattern = "\b" & strFind & "\b"
RegExpReplaceWord = re.Replace(strSource, strReplace)
Set re = Nothing
End Function
書かれているように、検索では大文字と小文字が区別されます。大文字と小文字を区別しない場合は、次の行を有効にします。
re.IgnoreCase = True
イミディエイト ウィンドウで ...
? RegExpReplaceWord("one too three", "too", "two")
one two three
? RegExpReplaceWord("one tool three", "too", "two")
one tool three
? RegExpReplaceWord("one too() three", "too", "two")
one two() three
? RegExpReplaceWord("one too three", "to", "two")
one too three
? RegExpReplaceWord("one too three", "t..", "two")
one two three
...そして区切り文字の範囲について...
? RegExpReplaceWord("one.too.three", "too", "two")
one.two.three
? RegExpReplaceWord("one,too,three", "too", "two")
one,two,three
? RegExpReplaceWord("one;too;three", "too", "two")
one;two;three
? RegExpReplaceWord("one:too:three", "too", "two")
one:two:three
? RegExpReplaceWord("one/too/three", "too", "two")
one/two/three
? RegExpReplaceWord("one?too?three", "too", "two")
one?two?three
? RegExpReplaceWord("one--too--three", "too", "two")
one--two--three
? RegExpReplaceWord("one***too***three", "too", "two")
one***two***three