Regular Expressions (Regex)

Simscope supports Regular Expressions for many search fields, used in:

This is based on the Google RE2 library:

→ View RE2 Regexp Syntax Documentation

Basic Regex Examples

To search for a string containing abc followed by xyz, with any number of characters in the middle use .*:

To search for foo followed by 1 or more digits:

To search for hello at the beginning of a string, prefix your expression with ^ (caret):

To search for smoke at the end of a string, suffix your expression with $ (dollar):

To match ONE or more of multiple possibilities, use the | (pipe) operator.

For example, to search for regressions containing daily or weekly:

To match ALL of multiple regular expressions (in any order), combine them with the , (comma) operator.

For example, to search for dev and daily (whether daily comes first or dev comes first):

NOTE: the , operator cannot be nested inside parenthesis. For example: (foo,bar) is not allowed. However: (foo|bar),baz is allowed.

To invert a regular expression (ie to exclude a pattern), prefix your expression with ! (exclamation mark).

For example, to search for regressions that do not contain dev:

This can also work with OR expressions. For example, to search for regressions that do not contain dev nor weekly:

NOTE: the ! operator cannot be nested inside parenthesis. For example, (!foo|bar) is not allowed. However, !(foo|bar) is allowed.

Here are a few sample expressions to show how multiple terms work:

Regex	Meaning
`!foo`\|`bar`	Contains NEITHER `foo` nor `bar`
`!(foo`\|`bar)`	(Equivalent to above, except with parenthesis)
`!foo,!bar*`	(Equivalent but using ANDs) → NOT contains `foo` AND NOT contains `bar`
`alpha,!beta`	Contains `alpha` AND does NOT contain `beta`
`!alpha,beta`	NOT contains `alpha` AND does contain `beta`
`alpha`\|`beta.*foo`\|`bar`	Contains `alpha` OR (contains `beta` followed by `foo`) OR contains `bar`

Regexes are by default case sensitive.

To switch to case-insensitive mode, add the following prefix to your expression:

For example, to match Daily or daily or DAILY: