bash - Can't match regex with sed -

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i'm trying match pattern (\^|\~?)(\d|x|\*)+\.(\d|x|\*)+\.(\d|x|\*)+ sed without luck. file i'm running through this:

{   "name": "something",   "version": "0.0.1",   "description": "some desc",   "main": "gulpfile.js",   "directories": {     "test": "tests"   },   "dependencies": {     "babel-polyfill": "^6.7.4",     "babel-preset-es2015": "^6.6.0",     "babel-preset-react": "^6.5.0",     "gulp-clean": "^0.3.2",     "jquery": "^2.1.4",     "lodash": "^4.0.0",     "moment": "^2.13.0",     "moment-timezone": "^0.5.0",     "radium": "^0.16.2",     "react": "^15.1.0",     "react-bootstrap-sweetalert": "^1.1.10",     "react-dom": "^15.1.0",     "react-timeago": "^2.2.1",     "sprintf": "^0.1.5",     "smoothscroll": "~0.2.2"   },   "devdependencies": {     "babel": "^6.3.26",     "babelify": "^7.2.0",     "browserify": "~12.0.1",     "console-stamp": "^0.2.0",     "estraverse-fb": "^1.3.1",     "gulp": "^3.9.0",     "gulp-concat": "^2.6.0",     "gulp-sass": "^2.1.1",     "gulp-sourcemaps": "^1.6.0",     "gulp-util": "^3.0.7",     "lodash": "4.5.1",     "lodash.assign": "^3.2.0",     "lodash.isfunction": "^3.0.8",     "lodash.reduce": "^4.3.0",     "node-sass": "3.4.2",     "react-bootstrap": "^0.29.4",     "react-intl": "2.1.0",     "reactify": "1.1.1",     "sweetalert": "^1.1.3",     "vinyl": "^1.1.0",     "vinyl-buffer": "^1.0.0",     "vinyl-source-stream": "^1.1.0",     "watchify": "^3.4.0",     "jsx-to-string": "~0.2.11"   },   "optionaldependencies": {     "pkg-save": "~1.0.2"   },   "scripts": {     "test": "echo \"error: no test specified\" && exit 1"   },   "repository": {     "type": "git",     "url": "someurl"   },   "author": "authorname",   "license": "mit" }

as can see in regexr matches desired pattern (also matching "version" that's issue i'll tackle later): http://regexr.com/3e324

i'm invoking invoking sed following command:
cat package.json | sed 's/(\^|\~?)(\d|x|\*)+\.(\d|x|\*)+\.(\d|x|\*)+/hello/g' -r

for sake of brevity, outputs (ie. unfiltered input):

... "dependencies": {     "babel-polyfill": "^6.7.4",     "babel-preset-es2015": "^6.6.0",     "babel-preset-react": "^6.5.0",     "gulp-clean": "^0.3.2", ...

it should replace digits "hello".
doing wrong?
bad flags (i've tried /gm)
or not using correct regex engine (i'm passing -r option utilize extended regex)?

while posix regular expression support named character classes, [[:digit:]] , [[:alnum:]], not support shorthand classes such \d , \w.

some gnu extensions bring shorthand classes support, restricted few of them, \w, \w, \s , \s according regular-expressions.info.

by replacing \d in regular expression [0-9] able transform document. regular expression becomes (\^|\~?)([0-9]|x|\*)+\.([0-9]|x|\*)+\.([0-9]|x|\*)+, or better [~^]([0-9x*]+\.){2}[0-9x*] (thanks ed morton !).

as side note, command rewritten following, not uses cat :

sed -e 's/[~^]([0-9x*]+\.){2}[0-9x*]/hello/' package.json

and noted matt, you'd better off using json parser such jq.


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