Regular expression and grep

Question

I want to find text in files by regular expression using grep. This is the text I want to find, where is the white space before closing bracket:

{if sometexthere }

My command is:

grep -E -n "\{if[^\}]*[\s+]+\}" mydir/*

But it found lines where there is no white space before closing bracket, such as

{if sometexthere}

Answer 1

这应该工作：

grep -E "\{if[^\}]*?\s+\}"

Answer 2

You seem to have made the regex needlessly complex. Try:

grep "{if[^}]*\s}$" filename