v0.12.0

Added

• RegularExpressionNode#options and InterpolatedRegularExpressionNode#options are now provided. These return integers that match up to the Regexp#options API.
• Greatly improved Node#inspect and Node#pretty_print APIs.
• MatchLastLineNode and InterpolatedMatchLastLineNode are introduced to represent using a regular expression as the predicate of an if or unless statement.
• IntegerNode now has a base flag on it.
• Heredocs that were previously InterpolatedStringNode and InterpolatedXStringNode nodes without any actual interpolation are now StringNode and XStringNode, respectively.
• StringNode now has a frozen? flag on it, which respects the frozen_string_literal magic comment.
• Numbered parameters are now supported, and are properly represented using LocalVariableReadNode nodes.
• ImplicitNode is introduced, which wraps implicit calls, local variable reads, or constant reads in omitted hash values.
• YARP::Dispatcher is introduced, which provides a way for multiple objects to listen for certain events on the AST while it is being walked. This is effectively a way to implement a more efficient visitor pattern when you have many different uses for the AST.

Changed

• BREAKING: Flags fields are now marked as private, to ensure we can change their implementation under the hood. Actually querying should be through the accessor methods.
• BREAKING: AliasNode is now split into AliasMethodNode and AliasGlobalVariableNode.
• Method definitions on local variables is now correctly handled.
• Unary minus precedence has been fixed.
• Concatenating character literals with string literals is now fixed.
• Many more invalid syntaxes are now properly rejected.
• BREAKING: Comments now no longer include their trailing newline.