Method: Parslet.dynamic

Defined in:

lib/parslet.rb

.dynamic(&block) ⇒ Object

Designates a piece of the parser as being dynamic. Dynamic parsers can either return a parser at runtime, which will be applied on the input, or return a result from a parse.

Dynamic parse pieces are never cached and can introduce performance abnormalitites - use sparingly where other constructs fail.

Example:

# Parses either 'a' or 'b', depending on the weather
dynamic { rand() < 0.5 ? str('a') : str('b') }

# File 'lib/parslet.rb', line 199

def dynamic(&block)
  Parslet::Atoms::Dynamic.new(block)
end