Allow primary builders to reduce allocations of empty structures by
allowing nil pointers to concrete struct types. Property readers will
not recurse into nil pointers, property writers will replace the nil
pointer with a pointer to the zero value of the pointer element type.
Allows a >50% primary builder time improvement with a trivial change in
Soong.
Change-Id: If6ad674bf7bf2a694c335378a074643a97d3c50b
Refactor the blueprint parser Value object, which contained a Type enum
and members to hold every possible type, into an interface (now called
Expression). Rename the existing Expression object that represented a binary
operator Operator.
Also adds and fixes some new printer test cases with mulitline expressions.
Change-Id: Icf4a20f92c8c2a27f18df8ca515a9d7f282ff133
Allow property structs to contain anonymous embedded structs and
interfaces. Properties in an anonymous embedded struct or interface are
treated as if they were properties in the embedding struct.
The only append semantics for bool that result in a no-op when the zero
value is appended is to OR the two values together, but that is rarely
the desired semantics. Add support for *bool and *string as property
types, where appending a nil pointer is a no-op. For *bool, appending a
non-nil pointer replaces the destination with the value. For *string,
appending a non-nil pointer appends the value.
This also provides a more reliable replacement for
ModuleContext.ContainsProperty, as the build logic can tell that the
property was set, even if it was set by a mutator and not by the
blueprints file, by testing against nil.
[]string already provides these semantics for lists.
Setting a *bool or *string property from a blueprints file is the same
syntax as setting a bool or a string property.
Allow tagging a nested property structure with
`blueprint:"filter(key:\"value\")"`, which will only allow property
assignments to properites in the nested structure that are tagged
with `key:"value"`. Moving the filter into Blueprint instead of
the project build logic allows more reliable and consistent error
messages.
Change-Id: I06bc673dde647776fc5552673bdc0cdcd7216462
Make integrating with go tools easier by putting the blueprint package
files in the top level directory of the git project instead of in a
subdirectory called blueprint.
Change-Id: I35c144c5fe7ddf34e478d0c47c50b2f6c92c2a03
