ExtractVars from the string expression Return data: [["{{key1}}", "key1"], ["{{key2}}", "key2"]].

NewConstMatcher defines constant part of the pattern.

NewPattern object by matchers.

NewPatternFromExpression parse expression {{varname}} - variable definition in the pattern Example: posts_{{id}}.

NewVarMatcher for the specific variable in the pattern.

Pattern matcher type.

FMatcher defines matching function.