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strings
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These functions use the common rfind() helper which contains the bug.
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Also fix bug in $string.replace().
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These expose the std::map<json_value,json_value> and std::set<json_value>
types to buildfiles.
New functions:
$size(<json-set>)
$size(<json-map>)
$keys(<json-map>)
Note that the $keys() function returns the list of map key as a json array.
For example:
m = [json_map] 2@([json] a@1 b@2) 1@([json] 1 2)
s = [json_set] ([json] x@1 y@2) ([json] a@1 b@2)
print ($m[2][b]) # 2
print ($s[([json] y@2 x@1)]) # true
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This exposes the std::set<std::string> type to buildfiles.
New functions:
$size(<string-set>)
Subscript returns true if the value is present and false otherwise (so
it is mapped to std::set::contains()). For example:
set = [string_set] a b c
if ($set[b])
...
Note that append (+=) and prepend (=+) have the same semantics
(std::set::insert()). For example:
set = [string_set] a b
set += c b # a b c
set =+ d b # a b c d
Example of iteration:
set = [string_set] a b c
for k: $set
...
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This exposes the std::map<std::string,std::string> type to buildfiles.
New functions:
$size(<string-map>)
$keys(<string-map>)
Subscript can be used to lookup a value by key. The result is [null] if
there is no value associated with the specified key. For example:
map = [string_map] a@1 b@2 c@3
b = ($map[b]) # 2
if ($map[z] == [null])
...
Note that append (+=) is overriding (like std::map::insert_or_assign())
while prepend (=+) is not (like std::map::insert()). In a sense, whatever
appears last (from left to right) is kept, which is consistent with what
we expect to happen when specifying the same key repeatedly in a literal
representation. For example:
map = [string_map] a@0 b@2 a@1 # a@1 b@2
map += b@0 c@3 # a@1 b@0 c@3
map =+ b@1 d@4 # a@1 b@0 c@3 d@4
Example of iteration:
map = [string_map] a@1 b@2 c@3
for p: $map
{
k = $first($p)
v = $second($p)
}
While the subscript is mapped to key lookup only, index-based access can be
implemented (with a bit of overhead) using the $keys() function:
map = [string_map] a@1 b@2 c@3
keys = $keys($m)
for i: $integer_sequence(0, $size($keys))
{
k = ($keys[$i])
v = ($map[$k])
}
Also, this commit changes the naming of other template-based value types (not
exposed as buildfile value types) to use C++ template id-like names (e.g.,
map<string,optional<bool>>).
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Feels like this is an equivalent context to subscript/iteration.
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New types:
json
json_array
json_object
New functions:
$json.value_type(<json>)
$json.value_size(<json>)
$json.member_{name,value}(<json-member>)
$json.object_names(<json-object>)
$json.array_size(<json-array>)
$json.array_find(<json-array>, <json>)
$json.array_find_index(<json-array>, <json>)
$json.load(<path>)
$json.parse(<text>)
$json.serialize(<json>[, <indentation>])
For example, to load a JSON value from a file:
j = $json.load($src_base/board.json)
Or to construct it in a buildfile:
j = [json] one@1 two@([json] 2 3 4) three@([json] x@1 y@-1)
This can also be done incrementally with append/prepend:
j = [json_object]
j += one@1
j += two@([json] 2 3 4)
j += three@([json] x@1 y@-1)
Instead of using this JSON-like syntax, one can also specify valid JSON
input text:
j = [json] '{"one":1, "two":[2, 3, 4], "three":{"x":1, "y":-1}'
Besides the above set of functions, other handy ways to access components
in a JSON value are iteration and subscript. For example:
for m: $j
print $member_name($m) $member_value($m)
print ($j[three])
A subscript can be nested:
print ($j[two][1])
print ($j[three][x])
While a JSON value can be printed directly like any other value, the
representation will not be pretty-printed. As a result, for complex
JSON values, printing a serialized representation might be a more
readable option:
info $serialize($j)
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The $find() function returns true if the sequence contains the specified
value. The $find_index() function returns the index of the first element
in the sequence that is equal to the specified value or $size(<sequence>)
if none is found. For string sequences, it's possible to request case-
insensitive comparison with a flag.
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functions
$is_a() returns true if the <name>'s target type is-a <target-type>. Note
that this is a dynamic type check that takes into account target type
inheritance.
$filter[_out]() return names with target types which are-a (filter) or
not are-a (filter_out) one of <target-types>.
In particular, these functions are useful for filtering prerequisite
targets ($<) in ad hoc recipes and rules.
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It returns the list of uint64 integers starting from <begin> (including)
to <end> (excluding) with the specified <step> or 1 if unspecified. For
example:
hdr = foo.hxx bar.hxx baz.hxx
src = foo.cxx bar.cxx baz.cxx
assert ($size($hdr) == $size($src)) "hdr and src expected to be parallel"
for i: $integer_sequence(0, $size($hdr))
{
h = ($hdr[$i])
s = ($src[$i])
...
}
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Specifically, now we can do:
x = [uint64] 0x0000ffff
cxx.poptions += "-DOFFSET=$x" # -DOFFSET=65535
cxx.poptions += "-DOFFSET=$string($x, 16)" # -DOFFSET=0xffff
cxx.poptions += "-DOFFSET=$string($x, 16, 8)" # -DOFFSET=0x0000ffff
Note that there is no hex notation support for the int64 (signed) type.
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Available overloads:
$sort(<names> [, <flags>])
$sort(<ints> [, <flags>])
$sort(<strings> [, <flags>])
$sort(<paths> [, <flags>])
$sort(<dir_paths> [, <flags>])
The following flag is supported by the all overloads:
dedup - in addition to sorting also remove duplicates
Additionally, the strings overload also support the following flag:
icase - sort ignoring case
Note that on case-insensitive filesystem the paths and dir_paths overload's
order is case-insensitive.
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It is also now possible to adjust this behavior with global
config.install.scope override. Valid values for this variable
are:
project -- only from project
strong -- from strong amalgamation
weak -- from weak amalgamation
global -- from all projects (default)
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specified
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Before:
x = [string null]
After:
x = [string, null]
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return_match flag is specified
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$process.run(<prog>[ <args>...])
Return trimmed stdout.
$process.run_regex(<prog>[ <args>...], <pat> [, <fmt>])
Return stdout lines matched and optionally processed with regex.
Each line of stdout (including the customary trailing blank) is matched (as a
whole) against <pat> and, if successful, returned, optionally processed with
<fmt>, as an element of a list.
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