Docile::Execution

@api private

A namespace for functions relating to the execution of a block agsinst a proxy object.

Public Class Methods

exec_in_proxy_context(dsl, proxy_type, *args, &block) click to toggle source

Execute a block in the context of an object whose methods represent the commands in a DSL, using a specific proxy class.

@param dsl [Object] context object whose methods make up the

(initial) DSL

@param proxy_type [FallbackContextProxy,

ChainingFallbackContextProxy]
        class to instantiate as the proxy context

@param args [Array] arguments to be passed to the block @yield the block of DSL commands to be executed @return [Object] the return value of the block

# File lib/docile/execution.rb, line 18
def exec_in_proxy_context(dsl, proxy_type, *args, &block)
  block_context = eval("self", block.binding)
  proxy_context = proxy_type.new(dsl, proxy_type.new(dsl, block_context))
  begin
    block_context.instance_variables.each do |ivar|
      value_from_block = block_context.instance_variable_get(ivar)
      proxy_context.instance_variable_set(ivar, value_from_block)
    end
    proxy_context.instance_exec(*args, &block)
  ensure
    block_context.instance_variables.each do |ivar|
      value_from_dsl_proxy = proxy_context.instance_variable_get(ivar)
      block_context.instance_variable_set(ivar, value_from_dsl_proxy)
    end
  end
end

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