module Docile::Execution
@api private
A namespace for functions relating to the execution of a block against a proxy object.
Public Class Methods
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]
which class to instantiate as proxy context
@param args [Array] arguments to be passed to the block @param block [Proc] the block of DSL commands to be executed @return [Object] the return value of the block
# File lib/docile/execution.rb, line 17 def exec_in_proxy_context(dsl, proxy_type, *args, &block) block_context = eval("self", block.binding) proxy_context = 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 if block_context.respond_to?(:__docile_undo_fallback__) block_context.send(:__docile_undo_fallback__) end block_context.instance_variables.each do |ivar| next unless proxy_context.instance_variables.include?(ivar) value_from_dsl_proxy = proxy_context.instance_variable_get(ivar) block_context.instance_variable_set(ivar, value_from_dsl_proxy) end end end
Private Instance Methods
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]
which class to instantiate as proxy context
@param args [Array] arguments to be passed to the block @param block [Proc] the block of DSL commands to be executed @return [Object] the return value of the block
# File lib/docile/execution.rb, line 17 def exec_in_proxy_context(dsl, proxy_type, *args, &block) block_context = eval("self", block.binding) proxy_context = 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 if block_context.respond_to?(:__docile_undo_fallback__) block_context.send(:__docile_undo_fallback__) end block_context.instance_variables.each do |ivar| next unless proxy_context.instance_variables.include?(ivar) value_from_dsl_proxy = proxy_context.instance_variable_get(ivar) block_context.instance_variable_set(ivar, value_from_dsl_proxy) end end end