v1.2.0

New Functionality

• GH-913: Add support for switch-level &parse-at and &parse-from
  attributes inside a unit.

• Add optimizer pass removing unimplemented functions and methods.

  This introduces a global pass triggered after all individual input
  ASTs have been finalized, but before we generate any C++ code. We
  then strip out any unimplemented member functions (typically Spicy
  hooks), both their definitions as well as their uses.

  In order to correctly handle previously generated C++ files which
  might have been generated with different optimization settings, we
  disallow optimizations if we detect that a C++ input file was
  generated by us.

Changed Functionality

• Add validation of unit switch attributes. We previously silently
  ignored unsupported attributes; now errors are raised.
• Remove configure option --build-zeek-plugin. Spicy no longer
  supports building the Zeek plugin/analyzers in-tree. This used to be
  available primarily for development purposes, but became challenging
  to maintain.
• Add environment variable [HILTI_CXX_INCLUDE_DIRS]{.title-ref} to
  specify additional C++ include directories when compiling generated
  code.
• GH-940: Add runtime check for parsing progress during loops.

Bug fixes

• Fix computation of unset locations.
• Fix accidental truncating conversion in integer code.