TRegExOption = (
roNone, //無
roIgnoreCase, //不區分大小寫
roMultiLine, //多行模式; 可使 ^ 和 $ 匹配每個行首或行尾
roExplicitCapture, //只捕獲指定了名稱或編號的子表達式
roCompiled, //預編譯表達式; 這在反復使用更有效率
roSingleLine, //單行模式; 使 . 也可匹配換行符
roIgnorePatternSpace //忽略注釋和未經轉義的空白
);
uses RegularExpressions;
{roIgnoreCase}
procedure TForm1.Button1Click(Sender: TObject);
const
pattern = '[A-Z]+\d+';
txt = 'AAA1 bbb2 aa11 bb22 A111 B222 AAAA';
var
match: TMatch;
begin
Memo1.Clear;
for match in TRegEx.Matches(txt, pattern, [roIgnoreCase]) do
begin
Memo1.Lines.Add(match.Value);
end;
Memo1.Lines.Add('----------');
for match in TRegEx.Matches(txt, pattern) do
begin
Memo1.Lines.Add(match.Value);
end;
end;
{*********************
AAA1
bbb2
aa11
bb22
A111
B222
----------
AAA1
A111
B222
**********************}
{roMultiLine}
procedure TForm1.Button2Click(Sender: TObject);
const
txt = 'Delphi Delphi Delphi'#13#10'Delphi Delphi Delphi';
var
rStr: string;
begin
Memo1.Clear;
{行首}
rStr := TRegEx.Replace(txt, '^Delphi', '......', [roMultiLine]);
Memo1.Lines.Add(rStr);
Memo1.Lines.Add('--------------------');
rStr := TRegEx.Replace(txt, '^Delphi', '......');
Memo1.Lines.Add(rStr);
Memo1.Lines.Add('--------------------');
{行尾}
rStr := TRegEx.Replace(txt, 'Delphi$', '......', [roMultiLine]);
Memo1.Lines.Add(rStr);
Memo1.Lines.Add('--------------------');
rStr := TRegEx.Replace(txt, 'Delphi$', '......');
Memo1.Lines.Add(rStr);
end;
{*********************
...... Delphi Delphi
...... Delphi Delphi
--------------------
...... Delphi Delphi
Delphi Delphi Delphi
--------------------
Delphi Delphi ......
Delphi Delphi ......
--------------------
Delphi Delphi Delphi
Delphi Delphi ......
**********************}
{roExplicitCapture}
procedure TForm1.Button3Click(Sender: TObject);
const
pattern1 = '([A-Z]+)(\d+)';
pattern2 = '(?<name1>[A-Z]+)(\d+)';
pattern3 = '([A-Z]+)(?<3>\d+)';
txt = 'AA11 BB22';
var
match: TMatch;
group: TGroup;
begin
Memo1.Clear;
for match in TRegEx.Matches(txt, pattern1, [roExplicitCapture]) do
begin
for group in match.Groups do
begin
Memo1.Lines.Add(group.Value);
end;
end;
Memo1.Lines.Add('--------------------');
for match in TRegEx.Matches(txt, pattern1) do //此處把 pattern1 換做 pattern2 或 pattern3 均可
begin
for group in match.Groups do
begin
Memo1.Lines.Add(group.Value);
end;
end;
Memo1.Lines.Add('--------------------');
for match in TRegEx.Matches(txt, pattern2, [roExplicitCapture]) do
begin
for group in match.Groups do
begin
Memo1.Lines.Add(group.Value);
end;
end;
Memo1.Lines.Add('--------------------');
for match in TRegEx.Matches(txt, pattern3, [roExplicitCapture]) do
begin
for group in match.Groups do
begin
Memo1.Lines.Add(group.Value);
end;
end;
end;
{*********************
AA11
BB22
--------------------
AA11
AA
11
BB22
BB
22
--------------------
AA11
AA
BB22
BB
--------------------
AA11
11
BB22
22
**********************}
{roCompiled}
procedure TForm1.Button4Click(Sender: TObject);
var
reg: TRegEx;
begin
reg := TRegEx.Create('\d+', [roCompiled]);
Memo1.Text := reg.Replace('AA11 BB22', '..'); //AA.. BB..
end;
{roSingleLine}
procedure TForm1.Button5Click(Sender: TObject);
const
pattern = '[A-Z]{1}.{1}';
txt = 'A B C D'#13#10'A B C D'#13#10'A B C D';
var
rStr: string;
begin
Memo1.Clear;
rStr := TRegEx.Replace(txt, pattern, '11', [roSingleLine]);
Memo1.Lines.Add(rStr);
Memo1.Lines.Add('--------------------');
rStr := TRegEx.Replace(txt, pattern, '11');
Memo1.Lines.Add(rStr);
end;
{*********************
11111111
11111111
111111D
--------------------
111111D
111111D
111111D
**********************}
{roIgnorePatternSpace}
procedure TForm1.Button6Click(Sender: TObject);
var
rStr: string;
begin
Memo1.Clear;
{忽略空白}
rStr := TRegEx.Replace('ABC,A B C,AB C', 'AB C', '...', [roIgnorePatternSpace]);
Memo1.Lines.Add(rStr); //...,A B C,AB C
rStr := TRegEx.Replace('ABC,A B C,AB C', 'AB C', '...');
Memo1.Lines.Add(rStr); //ABC,A B C,...
Memo1.Lines.Add('--------------------');
{使用注釋}
rStr := TRegEx.Replace('ABC123', 'ABC#*123', '...', [roIgnorePatternSpace]);
Memo1.Lines.Add(rStr); //...123
rStr := TRegEx.Replace('ABC123', 'ABC#*123', '...');
Memo1.Lines.Add(rStr); //...
end;
{*********************
...,A B C,AB C
ABC,A B C,...
--------------------
...123
...
**********************}
{選項集合}
procedure TForm1.Button7Click(Sender: TObject);
const
pattern = '^Delphi';
txt = 'DELPHI DELPHI DELPHI'#13#10'delphi delphi Delphi';
begin
Memo1.Text := TRegEx.Replace(txt, pattern, '......', [roIgnoreCase, roMultiLine]);
end;
{*********************
...... DELPHI Delphi
...... delphi Delphi
**********************}