Macro table can extend another macro table. All prototype template
declarations are imported automatically.
The editor now substitutes default values when entering new
expand macro/constraint filling the slots provided by the prototype.
Expand macro does not require name.
Minor editor improvements.
Expand macro template must have declaration of logicals matching
exactly the logical declarations in the prototype.
Can't refer to logicals declared directly in the prototype.
The old expand/call constructs are to be replaced by these.
Expand macro constraint refers to a named prototype, which
is specified in a macro table for matching concept.
Call macro constraint refers directly to a macro template.
Contex parameters are to be retired and explicit
parameters to expand macro constraint are to be used instead.
ExpandMacroTemplate to be used for dispatching macro invocations
based on the concept of the specified node.
Prototype is an abstraction to be implemented by
specific templates.
Call macros are to be parameterized with logicals and other parameters.
To replace combined expand/call macros causing confusion.
Context parameters to be passed explicitly.
ExpressionLogicalVariable is replaced with ExpressionItem wrapping
the same expression.
Fixes ensure correct application of transformations.
Late expression can't be used as "placeholder" logical item.
To avoid confusion, a rule defines "target ref", which is supposed
to indicate the source code location for possible errors.
The origin node is to be referred as "origin" as before.
Temporarily rename OriginSpec's alias to "target" to reflect change
in semantics.
LogicalItemValueExpression is to play the same role as valueOf(logical)
within an instance of EvaluationSubject.
LogicalItemExpression is to represent the logical variable itself.
This is an important change in coderules syntax: all expressions to be evaluated from
constraints/predicates are to be wrapped in parentheses and preceded by dollar sign.
So, instead of eval/backticks the new syntax is to be used: $(<expression>).
Also the expressions to be passed to "feedback reporting" predicates are to be wrapped similarly.
Now principal rule head must include only principal constraints or be empty.
Without this restriction journal may include stale chunks which have no information to invalidate them.
Rules that are used only as auxiliary resolvers don't have an associated
origin node, even though they are produced from a specific location.
To enable tracking of correct origin to report errors to one can use
origin(no origin){} to override the default behaviour.
Every node pointer (SNodeReference) specified as an arg to a constraint causes the (resolved) target to be included
into template application session (required).
Reduce NodeAnchor to .pointer call.
Deprecate Reporting interface and context repository in rule definitions.
Stronger rules for logical variables scope: constraint rule can't reference logical variable defined in another constraint rule. Logical variable definitions are localized to ConstraintRule template.
Simplify/cleanup the logic of searching for available logical variables.
Fedor Isakov