Instead of the hack that that uses session parameters to pass
parameters to expandMacro, use directly `withParams` method
on macro token. All parameters are mapped to corresponding fields.
Introduce CustomSessionParameter to access parameters in
TemplateApplicationSession.
During template application memo can be used to store results
of a computation in the session. The memo will be automatically
cleared on an event that invalidates the caches.
Operations such as 'error' and 'warning' are available on input
node in templates and serve to report issues found during
template application, in contrast with those found during evaluation.
Match constraint is provided for use cases where the intention
is to pattern-match a term capturing features into logical
variables.
A term constructor in the right-hand side of match constraint
is a pattern, and all its non-overridden features are
to be defined as wildcards.
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.
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.
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.
One should be able to report issues with a target.
The target is normally inferred from the rule's origin, but sometimes it is
necessary to specify the issue's target explicitly.
Fedor Isakov