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These are useful outside the package too when calling
proptools.ExtendMatchingProperties.
Change-Id: I054eb105e0dd5287aff99b8be137a8b09d52492d
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Support int64 number instead of int to be more fixed to bit size so
that the underlying arch won't affect overflow cases. Besides,
refection: func (v Value) Int() int64 always cast to int64 no matter the
input is int, int16, int32. Currently we always treat "-" as negative
sign to bind to next value, and "+" as plus operator to add operands
together.
So we allow:
a = 5 + -4 + 5 or a = -4 + 5
But we don't allow:
a = +5 + 4 + -4 since we don't treat "+" as a positive sign, otherwise,
a = 5 + +5 would exist which looks pretty weird. In the future, we may
want fully support number calculator logic eg, "+"/"-" can be
positive/negative sign or operator, and "(" and ")" will be considered
to group expressions with a higher precedence.
int & uint properties within struct keeps unchanged, which is only
allowed when tagged with 'blueprint:mutated'. We only allow *int64
property instead of int64 property within struct since it does't make
sense to do prepending or appending to int64.
Change-Id: I565e046dbd268af3538aee148cd7300037e56523
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Blueprint was using "replace" semantics when unpacking properties
into property structs, meaning if a module factory pre-set property
values they would be overwritten by whatever was in the Blueprint
file. This is different than what would happen if the same property
was updated using the Append*Properties functions in proptools, which
would use "append" semantics, which append strings and lists,
logically ORs booleans and replaces pointers to strings and booleans.
Replace unpack's semantics with append semantics for consistency.
Any previous users of pre-set properties can move to using a pointer
to a string or boolean if they want the old behavior.
Test: unpack_test.go
Test: extend_test.go
Change-Id: I02eebe80916e578938142f8e76889bd985223afc
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Allow using ExtendMatchingProperties to extend pointer to a struct or an
interface containing a pointer to a struct using a struct, and
vice-versa.
Also fixes a pre-existing bug where extending a nested structure could
fail if there were multiple possible destnations and some of them did
not have a matching nested property.
Change-Id: I6e69d78eb6595ba7dd2603e3aa7dd8de3f292744
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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
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proptools cloning and extending are a significant portion of the run
time for Soong. Optimize out calls to reflect.Type.Field(), which must
allocate a []int to store the index, by caching all the fields of each
type as it is seen, and by iterating over a slice of cached fields
instead of calling Field(i) for each one. Also avoid calling
reflect.Value.Interface() twice on the same Value.
Change-Id: I4e13fc85f30d8614a5586283e928c0a6d7f24809
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ExtendProperties is the same as AppendProperties or PrependProperties,
but takes a function that determines whether each property should be
appended or prepended.
Change-Id: I26e400d56d75a88bab9c27c382ee5321bc623ee5
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This makes *string values act like *bool values -- instead of appending
or prepending the contents of the string, the entire string is replaced.
The use case here is for overriding filenames, where appending doesn't
work.
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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.
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It is common for a mutator to append or prepend property structs
together. Add helper functions to append or prepend properties in property
structs. The append operation is defined as appending string and slices
of strings normally, OR-ing bool values, and recursing into embedded
structs, pointers to structs, and interfaces containing pointers to
structs. Appending or prepending the zero value of a property will
always be a no-op.
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