cmd - Windows egrep not matching regex -

i'm trying search regex on windows after installing egrep.

this example of i'm trying find:

in string below want match ever it's comparing single specific letter

if (lod_user.is_type == "a" || lod_user.is_type == "e" || lod_user.is_type == "s" || lod_user.is_type == "x") 

so acceptable result s_type == "a" or s_type == "s"

and these queries i've attempted:

"c:..\..\program files (x86)\gnuwin32\bin\egrep.exe" -hn --regexp=s_type[\s-]*==[\s-]*"[cuompsqdexyaz]" filename

the address egrep, refer egrep

egrep -hn --regexp=type[\s-]*==[\s-]*"[cuompsqdexyaz]" filename

egrep -hn --regexp=[\s-]*==[\s-]*"[cuompsqdexyaz]" filename

egrep -hn --regexp=[\s-]*==[\s-]*"a" filename testing 1 letter

egrep -hn --regexp=^type[\s-]*==[\s-]*"[cuompsqdexyaz]"$ filename

egrep -hn --regexp=^type$[\s-]*==[\s-]*"[cuompsqdexyaz]" filename

i'm not going post attempts cause @ point started playing around , guessing. regex, s_type[\s-]*==[\s-]*"[cuompsqdexyaz]", works on http://gskinner.com/regexr/ figured has cmd , problems unescaped characters tried replacing quotes ^" example still nothing. regexp works though [\s-]*==[\s-]*"." doesn't accomplish want.

egrep not understand \s, try posix character class [[:space:]] in place. or if want permit whitespace or literal dash (minus) [-[:space:]] have [\s-] currently. (or trying use emacs character classes?)

not sure quoting rules on windows, traditionally, quote entire regular expression.