[gtk+] (19 commits) Non-fast-forward update to branch wip/otte/shader

[Benjamin Otte <otte src gnome org>]

The branch 'wip/otte/shader' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  c6ea466... gskslpreprocessor: Redo error emission
  19b511b... gsksl: Add an error enum
  ec01601... gskslpreprocessor: Return fatalness of parsing
  d920b47... gsksl: Make expression parsing never fail
  10f51ce... gskslnode: Always return a statement
  b5fe837... gskslscope: Track function calls
  a4abb78... gskslexpression: Implment function calls
  f32a60f... gsksl: Add support for structs
  098f027... gsksl: Add support for parsing members of struct variables
  7f93e8d... gsksltype: Generate better type names
  8e25b26... gskslfunction: Properly type-check calls to struct construc
  9e901f7... gsksl: Introduce gsk_sl_preprocessor_sync()
  ab7ccc4... gskslfunction: Parse arguments
  5fdb8a3... gskslexpression: Parse (sub)expressions in parenthesis
  9b646ad... gskslexpression: Change function call error handling
  920877e... gskslexpression: Implement negation

Commits added to the branch:

  8f20967... gskslpreprocessor: Redo error emission
  fb73a99... gsksl: Add an error enum
  d2d9ca7... gskslpreprocessor: Return fatalness of parsing
  1de9051... gsksl: Make expression parsing never fail
  8eee077... gskslnode: Always return a statement
  37a73f8... gskslscope: Track function calls
  970a83d... gskslexpression: Implment function calls
  8f6d2c5... gsksl: Add support for structs
  525d627... gsksl: Add support for parsing members of struct variables
  4a4c483... gsksltype: Generate better type names
  93f8916... gskslfunction: Properly type-check calls to struct construc
  cd45181... gsksl: Introduce gsk_sl_preprocessor_sync()
  68b711b... gskslfunction: Parse arguments
  d8fc177... gskslexpression: Parse (sub)expressions in parenthesis
  b6c4726... gskslexpression: Change function call error handling
  564e0ad... gskslexpression: Implement negation
  5c1868c... gskslfunction: Split regular and builtin constructors
  1a348fd... gskslfunction: Reorganize gsk_sl_function_matches()
  cd07e00... gsksl: Add support for overloaded functions