[vala] (36 commits) Created branch wip/transform

[Luca Bruno <lucabru src gnome org>]

The branch 'wip/transform' was created.

Summary of new commits:

  39ee938... Analyze nodes after they are inserted into the tree
  ce78846... Make the semantic analyzer be stateless
  6e86af5... Collect error_types on demand to allow transformations
  90aaa61... Code transformer
  900c73b... Move WhileStatement transformation into the code transforme
  8d543a4... Move DoStatement transformation into the code transformer
  74e6257... Move ForStatement transformation into the code transformer
  e3e67b1... Move ConditionalExpression transformation into the code tra
  d95a0d6... GVariant transformer
  08d743d... Add ConditionalExpression.replace_expression plus other fix
  02d157a... Add missing replace_expression to code nodes
  08e1b5e... Code builder
  a9ff350... Parse expressions from string
  001d2e3... Serialize structs
  87e6767... Serialize hash table
  cd2b917... Basic gvariant deserialization
  df6e86b... Deserialize arrays
  5dbc3d5... Deserialize structs
  8b94d25... Deserialize hash tables
  4efa555... Wrapper methods
  16517f0... Cache wrapper methods
  4d9814a... Use wrapper method for serializing hash table and structs
  831c139... Resolve symbols during transformation
  3cf8710... Add more to_string() methods to expressions
  c427a36... Let the transformer handle recursive transformations
  ee9874b... Simplify some code
  a87b72c... Move gvariant helper methods down to CodeTransformer
  d213320... Drop serialize_expression
  05cf533... Use wrapper methods for deserializing gvariants
  e114d43... Complete the gvariant transformer
  37d1394... GDBus client transformer
  066b257... GDBus server transformer
  3b33639... Drop unnecessary code
  ef94a3d... Drop build_context from CodeBuilder
  106df2e... Fix nested Variant (de)serialization
  383ef72... Move ForeachStatement transformation into the code transfor