pub enum Transform<N: Node> {
Show 68 variants
Root,
ContextItem,
Compose(Vec<Transform<N>>),
Step(NodeMatch),
Filter(Box<Transform<N>>),
Empty,
Literal(Rc<Item<N>>),
LiteralElement(QualifiedName, Box<Transform<N>>),
Element(Box<Transform<N>>, Box<Transform<N>>),
LiteralAttribute(QualifiedName, Box<Transform<N>>),
LiteralComment(Box<Transform<N>>),
LiteralProcessingInstruction(Box<Transform<N>>, Box<Transform<N>>),
SequenceItems(Vec<Transform<N>>),
Copy(Box<Transform<N>>, Box<Transform<N>>),
DeepCopy(Box<Transform<N>>),
Or(Vec<Transform<N>>),
And(Vec<Transform<N>>),
GeneralComparison(Operator, Box<Transform<N>>, Box<Transform<N>>),
ValueComparison(Operator, Box<Transform<N>>, Box<Transform<N>>),
Concat(Vec<Transform<N>>),
Range(Box<Transform<N>>, Box<Transform<N>>),
Arithmetic(Vec<ArithmeticOperand<N>>),
Loop(Vec<(String, Transform<N>)>, Box<Transform<N>>),
Switch(Vec<(Transform<N>, Transform<N>)>, Box<Transform<N>>),
ForEach(Option<Grouping<N>>, Box<Transform<N>>, Box<Transform<N>>),
ApplyTemplates(Box<Transform<N>>),
ApplyImports,
NextMatch,
Union(Vec<Transform<N>>),
Call(Box<Transform<N>>, Vec<Transform<N>>),
VariableDeclaration(String, Box<Transform<N>>, Box<Transform<N>>),
VariableReference(String),
SetAttribute(QualifiedName, Box<Transform<N>>),
Position,
Last,
Count(Box<Transform<N>>),
LocalName(Option<Box<Transform<N>>>),
Name(Option<Box<Transform<N>>>),
String(Box<Transform<N>>),
StartsWith(Box<Transform<N>>, Box<Transform<N>>),
EndsWith(Box<Transform<N>>, Box<Transform<N>>),
Contains(Box<Transform<N>>, Box<Transform<N>>),
Substring(Box<Transform<N>>, Box<Transform<N>>, Option<Box<Transform<N>>>),
SubstringBefore(Box<Transform<N>>, Box<Transform<N>>),
SubstringAfter(Box<Transform<N>>, Box<Transform<N>>),
NormalizeSpace(Option<Box<Transform<N>>>),
Translate(Box<Transform<N>>, Box<Transform<N>>, Box<Transform<N>>),
Boolean(Box<Transform<N>>),
Not(Box<Transform<N>>),
True,
False,
Number(Box<Transform<N>>),
Sum(Box<Transform<N>>),
Floor(Box<Transform<N>>),
Ceiling(Box<Transform<N>>),
Round(Box<Transform<N>>, Option<Box<Transform<N>>>),
CurrentDateTime,
CurrentDate,
CurrentTime,
FormatDateTime(Box<Transform<N>>, Box<Transform<N>>, Option<Box<Transform<N>>>, Option<Box<Transform<N>>>, Option<Box<Transform<N>>>),
FormatDate(Box<Transform<N>>, Box<Transform<N>>, Option<Box<Transform<N>>>, Option<Box<Transform<N>>>, Option<Box<Transform<N>>>),
FormatTime(Box<Transform<N>>, Box<Transform<N>>, Option<Box<Transform<N>>>, Option<Box<Transform<N>>>, Option<Box<Transform<N>>>),
CurrentGroup,
CurrentGroupingKey,
UserDefined(QualifiedName, Vec<(String, Transform<N>)>, Box<Transform<N>>),
Message(Box<Transform<N>>, Option<Box<Transform<N>>>, Box<Transform<N>>, Box<Transform<N>>),
NotImplemented(String),
Error(ErrorKind, String),
}Expand description
Specifies how a Sequence is constructed.
Variants§
Root
Produces the root node of the tree containing the context item.
ContextItem
Produces a copy of the context item.
Compose(Vec<Transform<N>>)
A path in a tree. Each element of the outer vector is a step in the path. The result of each step becomes the new context for the next step.
Step(NodeMatch)
A step in a path.
Filter(Box<Transform<N>>)
Filters the selected items. Each item in the context is evaluated against the predicate. If the resulting sequence has an effective boolean value of ‘true’ then it is kept, otherwise it is discarded.
Empty
An empty sequence
Literal(Rc<Item<N>>)
A literal, atomic value.
LiteralElement(QualifiedName, Box<Transform<N>>)
A literal element. Consists of the element name and content.
Element(Box<Transform<N>>, Box<Transform<N>>)
A constructed element. Consists of the name and content.
LiteralAttribute(QualifiedName, Box<Transform<N>>)
A literal attribute. Consists of the attribute name and value. NB. The value may be produced by an Attribute Value Template, so must be dynamic.
LiteralComment(Box<Transform<N>>)
A literal comment. Consists of the value.
LiteralProcessingInstruction(Box<Transform<N>>, Box<Transform<N>>)
A literal processing instruction. Consists of the name and value.
SequenceItems(Vec<Transform<N>>)
Produce a Sequence. Each element in the vector becomes one, or more, item in the sequence.
Copy(Box<Transform<N>>, Box<Transform<N>>)
A shallow copy of an item. Consists of the selector of the item to be copied, and the content of the target.
DeepCopy(Box<Transform<N>>)
A deep copy of an item. That is, it copies an item including its descendants.
Or(Vec<Transform<N>>)
Logical OR. Each element of the outer vector is an operand.
And(Vec<Transform<N>>)
Logical AND. Each element of the outer vector is an operand.
GeneralComparison(Operator, Box<Transform<N>>, Box<Transform<N>>)
XPath general comparison. Each item in the first sequence is compared against all items in the second sequence.
ValueComparison(Operator, Box<Transform<N>>, Box<Transform<N>>)
XPath value comparison. The first singleton sequence is compared against the second singleton sequence.
Concat(Vec<Transform<N>>)
Concatenate string values
Range(Box<Transform<N>>, Box<Transform<N>>)
Produce a range of integer values. Consists of the start value and end value.
Arithmetic(Vec<ArithmeticOperand<N>>)
Perform arithmetic operations
Loop(Vec<(String, Transform<N>)>, Box<Transform<N>>)
A repeating transformation. Consists of variable declarations and the loop body.
Switch(Vec<(Transform<N>, Transform<N>)>, Box<Transform<N>>)
A branching transformation. Consists of (test, body) clauses and an otherwise clause.
ForEach(Option<Grouping<N>>, Box<Transform<N>>, Box<Transform<N>>)
Evaluate a transformation for each selected item, with possible grouping.
ApplyTemplates(Box<Transform<N>>)
Find a template that matches an item and evaluate its body with the item as the context. Consists of the selector for items to be matched.
ApplyImports
Find templates at the next import level and evaluate its body.
NextMatch
Union(Vec<Transform<N>>)
Set union
Call(Box<Transform<N>>, Vec<Transform<N>>)
Evaluate a named template or function, with arguments. Consists of the body of the template/function and the actual arguments (variable declarations).
VariableDeclaration(String, Box<Transform<N>>, Box<Transform<N>>)
Declare a variable in the current context. Consists of the variable name, its value, and a transformation to perform with the variable in scope.
VariableReference(String)
Reference a variable. The result is the value stored for that variable in the current context and current scope.
SetAttribute(QualifiedName, Box<Transform<N>>)
Set the value of an attribute. The context item must be an element-type node. Consists of the name of the attribute and its value. The Sequence produced will be cast to a Value.
Position
XPath functions
Last
Count(Box<Transform<N>>)
LocalName(Option<Box<Transform<N>>>)
Name(Option<Box<Transform<N>>>)
String(Box<Transform<N>>)
StartsWith(Box<Transform<N>>, Box<Transform<N>>)
EndsWith(Box<Transform<N>>, Box<Transform<N>>)
Contains(Box<Transform<N>>, Box<Transform<N>>)
Substring(Box<Transform<N>>, Box<Transform<N>>, Option<Box<Transform<N>>>)
SubstringBefore(Box<Transform<N>>, Box<Transform<N>>)
SubstringAfter(Box<Transform<N>>, Box<Transform<N>>)
NormalizeSpace(Option<Box<Transform<N>>>)
Translate(Box<Transform<N>>, Box<Transform<N>>, Box<Transform<N>>)
Boolean(Box<Transform<N>>)
Not(Box<Transform<N>>)
True
False
Number(Box<Transform<N>>)
Sum(Box<Transform<N>>)
Floor(Box<Transform<N>>)
Ceiling(Box<Transform<N>>)
Round(Box<Transform<N>>, Option<Box<Transform<N>>>)
CurrentDateTime
CurrentDate
CurrentTime
FormatDateTime(Box<Transform<N>>, Box<Transform<N>>, Option<Box<Transform<N>>>, Option<Box<Transform<N>>>, Option<Box<Transform<N>>>)
FormatDate(Box<Transform<N>>, Box<Transform<N>>, Option<Box<Transform<N>>>, Option<Box<Transform<N>>>, Option<Box<Transform<N>>>)
FormatTime(Box<Transform<N>>, Box<Transform<N>>, Option<Box<Transform<N>>>, Option<Box<Transform<N>>>, Option<Box<Transform<N>>>)
CurrentGroup
CurrentGroupingKey
UserDefined(QualifiedName, Vec<(String, Transform<N>)>, Box<Transform<N>>)
A user-defined callable. Consists of a name, an argument list, and a body. TODO: merge with Call?
Message(Box<Transform<N>>, Option<Box<Transform<N>>>, Box<Transform<N>>, Box<Transform<N>>)
Emit a message. Consists of a select expression, a terminate attribute, an error-code, and a body.
NotImplemented(String)
For things that are not yet implemented, such as: Union, IntersectExcept, InstanceOf, Treat, Castable, Cast, Arrow, Unary, SimpleMap, Is, Before, After.
Error(ErrorKind, String)
Error condition.