如何用Notepad++正则匹配#include行中的>字符并替换

Got it, let's solve this exact problem: we need to swap out any > characters that appear on lines containing #include for a ", without touching other > in your code (like those in template<class Alloc>). We'll use Notepad++'s regex find-and-replace to target only the right lines.

Step-by-Step Instructions #

1. Open your file in Notepad++, press Ctrl+H to open the Find/Replace dialog.
2. Switch to the Replace tab.
3. Check the Regular expression box at the bottom left (make sure . matches newline is unchecked).
4. Choose one of the two regex patterns below based on your needs:

Option 1: Replace the First > on the #include Line (Most Common) #

This works for standard #include lines that only have one > (like your example #include "utility>):

• Find what: ^(.*#include.*?)>(.*)$
• Replace with: \1"\2

How This Regex Works:

• ^ anchors the match to the start of the line
• (.*#include.*?) captures everything from the start of the line up to the first > (the *? is non-greedy, so it stops at the first > instead of skipping ahead)
• > targets the exact character we want to replace
• (.*)$ captures everything after the > to the end of the line
• \1"\2 puts it all back together: the first captured section, a " instead of >, then the rest of the line.

Option 2: Replace All > on the #include Line #

If you have a rare case where a single #include line has multiple > characters (e.g., #include "file>with>extra>chars>), use this to replace every > on that line:

• Find what: (?<=.*#include.*)>
• Replace with: "

How This Regex Works:

• (?<=.*#include.*) is a positive lookbehind—it checks that the > is on a line that contains #include (anywhere before the >)
• > targets the character to replace
• Since this doesn't capture the whole line, every matching > on a #include line gets swapped for ".

Example Results #

• Original line: #include "utility> → Becomes #include "utility"
• Unchanged line: template<class Alloc> → Stays exactly as is
• Commented #include line: // #include "broken> → Becomes // #include "broken"

Notes #

• This preserves all comments and existing content on the line—only the > gets swapped.
• If your #include lines have leading whitespace (e.g., indentation), the regex will still catch them, since .* matches any characters (including spaces) before #include.

内容的提问来源于stack exchange，提问作者Cam Krout