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Merge Node constructors (#146)

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Merge Node constructors
merged-on-behalf-of: BBasile <BBasile@users.noreply.github.com>
This commit is contained in:
Cameron Ross 2018-06-10 05:28:58 -03:00 committed by The Dlang Bot
parent 28a61180bf
commit 5757869e9a
1 changed files with 122 additions and 117 deletions
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241
source/dyaml/node.d
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@ -203,14 +203,6 @@ struct Node
static assert(Value.sizeof <= 24, "Unexpected YAML value size");
static assert(Node.sizeof <= 56, "Unexpected YAML node size");
// If scalarCtorNothrow!T is true, scalar node ctor from T can be nothrow.
//
// TODO
// Eventually we should simplify this and make all Node constructors except from
// user values nothrow (and think even about those user values). 2014-08-28
enum scalarCtorNothrow(T) =
(is(Unqual!T == string) || isIntegral!T || isFloatingPoint!T) || is(Unqual!T == bool) ||
(Value.allowed!T && (!is(Unqual!T == Value) && !isSomeString!T && !isArray!T && !isAssociativeArray!T));
public:
/** Construct a Node from a value.
*
@ -219,6 +211,12 @@ struct Node
* more efficiently. To create a node representing a null value,
* construct it from YAMLNull.
*
* If value is a node, its value will be copied directly. The tag and
* other information attached to the original node will be discarded.
*
* If value is an array of nodes or pairs, it is stored directly.
* Otherwise, every value in the array is converted to a node, and
* those nodes are stored.
*
* Note that to emit any non-default types you store
* in a node, you need a Representer to represent them in YAML -
@ -233,39 +231,127 @@ struct Node
* a shortcut, like "!!int".
*/
this(T)(T value, const string tag = null)
if(!scalarCtorNothrow!T && (!isArray!T && !isAssociativeArray!T))
{
tag_ = tag;
// No copyconstruction.
static assert(!is(Unqual!T == Node));
enum unexpectedType = "Unexpected type in the non-nothrow YAML node constructor";
static if(isSomeString!T) { setValue(value.to!string); }
else static if(is(Unqual!T == Value)) { setValue(value); }
else static if(Value.allowed!T) { static assert(false, unexpectedType); }
// User defined type.
else { setValue(value); }
//Unlike with assignment, we're just copying the value.
static if (is(Unqual!T == Node))
{
setValue(value.value_);
}
/// Ditto.
// Overload for types where we can make this nothrow.
this(T)(T value, const string tag = null)
if(scalarCtorNothrow!T)
else static if(isSomeString!T)
{
tag_ = tag;
// We can easily store ints, floats, strings.
static if(isIntegral!T) { setValue(cast(long)value); }
else static if(is(Unqual!T==bool)){ setValue(cast(bool)value); }
else static if(isFloatingPoint!T) { setValue(cast(real)value); }
// User defined type or plain string.
else { setValue(value);}
setValue(value.to!string);
}
else static if(is(Unqual!T == bool))
{
setValue(cast(bool)value);
}
else static if(isIntegral!T)
{
setValue(cast(long)value);
}
else static if(isFloatingPoint!T)
{
setValue(cast(real)value);
}
else static if (isArray!T)
{
alias ElementT = Unqual!(ElementType!T);
// Construction from raw node or pair array.
static if(is(ElementT == Node) || is(ElementT == Node.Pair))
{
setValue(value);
}
// Need to handle byte buffers separately.
else static if(is(ElementT == byte) || is(ElementT == ubyte))
{
setValue(cast(ubyte[]) value);
}
else
{
Node[] nodes;
foreach(ref v; value)
{
nodes ~= Node(v);
}
setValue(nodes);
}
}
else static if (isAssociativeArray!T)
{
Node.Pair[] pairs;
foreach(k, ref v; value)
{
pairs ~= Pair(k, v);
}
setValue(pairs);
}
// User defined type.
else
{
setValue(value);
}
}
/// Construct a scalar node
@safe unittest
{
// Integer
{
auto node = Node(5);
}
// String
{
auto node = Node("Hello world!");
}
// Floating point
{
auto node = Node(5.0f);
}
// Boolean
{
auto node = Node(true);
}
// Time
{
auto node = Node(SysTime(DateTime(2005, 06, 15, 20, 00, 00), UTC()));
}
// Integer, dumped as a string
{
auto node = Node(5, "tag:yaml.org,2002:str");
}
}
/// Construct a sequence node
@safe unittest
{
// Will be emitted as a sequence (default for arrays)
{
auto seq = Node([1, 2, 3, 4, 5]);
}
// Will be emitted as a set (overridden tag)
{
auto set = Node([1, 2, 3, 4, 5], "tag:yaml.org,2002:set");
}
// Can also store arrays of arrays
{
auto node = Node([[1,2], [3,4]]);
}
}
/// Construct a mapping node
@safe unittest
{
// Will be emitted as an unordered mapping (default for mappings)
auto map = Node([1 : "a", 2 : "b"]);
// Will be emitted as an ordered map (overridden tag)
auto omap = Node([1 : "a", 2 : "b"], "tag:yaml.org,2002:omap");
// Will be emitted as pairs (overridden tag)
auto pairs = Node([1 : "a", 2 : "b"], "tag:yaml.org,2002:pairs");
}
@safe unittest
{
{
auto node = Node(42);
assert(node.isScalar && !node.isSequence &&
!node.isMapping && !node.isUserType);
assert(node.isScalar && !node.isSequence && !node.isMapping && !node.isUserType);
assert(node.as!int == 42 && node.as!float == 42.0f && node.as!string == "42");
assert(!node.isUserType);
}
@ -279,55 +365,6 @@ struct Node
assert(node.as!string == "string");
}
}
/** Construct a node from an _array.
*
* If _array is an _array of nodes or pairs, it is stored directly.
* Otherwise, every value in the array is converted to a node, and
* those nodes are stored.
*
* Params: array = Values to store in the node.
* tag = Overrides tag of the node when emitted, regardless
* of tag determined by Representer. Representer uses
* this to determine YAML data type when a D data type
* maps to multiple different YAML data types.
* This is used to differentiate between YAML sequences
* ("!!seq") and sets ("!!set"), which both are
* internally represented as an array_ of nodes. Tag
* must be in full form, e.g. "tag:yaml.org,2002:set",
* not a shortcut, like "!!set".
*
*/
this(T)(T[] array, const string tag = null)
if (!isSomeString!(T[]))
{
tag_ = tag;
// Construction from raw node or pair array.
static if(is(Unqual!T == Node) || is(Unqual!T == Node.Pair))
{
setValue(array);
}
// Need to handle byte buffers separately.
else static if(is(Unqual!T == byte) || is(Unqual!T == ubyte))
{
setValue(cast(ubyte[]) array);
}
else
{
Node[] nodes;
foreach(ref value; array){nodes ~= Node(value);}
setValue(nodes);
}
}
///
@safe unittest
{
// Will be emitted as a sequence (default for arrays)
auto seq = Node([1, 2, 3, 4, 5]);
// Will be emitted as a set (overriden tag)
auto set = Node([1, 2, 3, 4, 5], "tag:yaml.org,2002:set");
}
@safe unittest
{
with(Node([1, 2, 3]))
@ -338,43 +375,6 @@ struct Node
}
}
/** Construct a node from an associative _array.
*
* If keys and/or values of _array are nodes, they stored directly.
* Otherwise they are converted to nodes and then stored.
*
* Params: array = Values to store in the node.
* tag = Overrides tag of the node when emitted, regardless
* of tag determined by Representer. Representer uses
* this to determine YAML data type when a D data type
* maps to multiple different YAML data types.
* This is used to differentiate between YAML unordered
* mappings ("!!map"), ordered mappings ("!!omap"), and
* pairs ("!!pairs") which are all internally
* represented as an _array of node pairs. Tag must be
* in full form, e.g. "tag:yaml.org,2002:omap", not a
* shortcut, like "!!omap".
*
*/
this(K, V)(V[K] array, const string tag = null)
{
tag_ = tag;
Node.Pair[] pairs;
foreach(key, ref value; array){pairs ~= Pair(key, value);}
setValue(pairs);
}
///
@safe unittest
{
// Will be emitted as an unordered mapping (default for mappings)
auto map = Node([1 : "a", 2 : "b"]);
// Will be emitted as an ordered map (overriden tag)
auto omap = Node([1 : "a", 2 : "b"], "tag:yaml.org,2002:omap");
// Will be emitted as pairs (overriden tag)
auto pairs = Node([1 : "a", 2 : "b"], "tag:yaml.org,2002:pairs");
}
@safe unittest
{
int[string] aa;
@ -386,7 +386,12 @@ struct Node
assert(length == 2);
assert(opIndex("2").as!int == 2);
}
}
@safe unittest
{
auto node = Node(Node(4, "tag:yaml.org,2002:str"));
assert(node == 4);
assert(node.tag_ == "");
}
/** Construct a node from arrays of _keys and _values.