Parameter.regex.txt

# Matches Potential Open SCAD Module Parameters
(?<=[\(\,])                                         # After a ( or a ,
\s{0,}                                              # Optional Whitespace
(?<Name>\w+)                                        # The Parameter Name
\s{0,}                                              # Optional Whitespace
# A literal = is used to determine if it Has a default value
(?<HasDefaultValue>=)?
# If there is a default value
(?(HasDefaultValue)(\s{0,}                          # Allow optional whitespace
# Match the value, which could be
(?>
  (?<Value>(?<ListValue>(?<BalancedBrackets>
\[                                                  # An open bracket
(?>                                                 # Followed by...
    [^\[\]]+|                                       # any number of non-bracket character OR
    \[(?<Depth>)|                                   # an open bracket (in which case increment depth) OR
    \](?<-Depth>)                                   # a closed bracket (in which case decrement depth)
)*(?(Depth)(?!))                                    # until depth is 0.
\]                                                  # followed by a closing bracket
)
)                                                   # A List Value
    |
    (?<NumberValue>[\d\.]+)                         # A number
    |
    (?<BooleanValue>true|false)                     # A boolean literal
    |
    (?<ConstantValue>\w+)                           # A constant value
    |
    \"                                              # A string
(?<StringValue>(?:.|\s)*?(?<!\\))"    |
    (?<Expression>(?<BalancedParenthesis>
\(                                                  # An open parenthesis
(?>                                                 # Followed by...
    [^\(\)]+|                                       # any number of non-parenthesis character OR
    \((?<Depth>)|                                   # an open parenthesis (in which case increment depth) OR
    \)(?<-Depth>)                                   # a closed parenthesis (in which case decrement depth)
)*(?(Depth)(?!))                                    # until depth is 0.
\)                                                  # followed by a closing parenthesis
)
)))))\s{0,}