scala.quoted (original) (raw)
Members list
Quoted expression of type T.
Quoted expression of type T.
Expr has extension methods that are defined in scala.quoted.Quotes.
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Supertypes
Constructors for expressions
Constructors for expressions
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Self type
A type class for types that can convert a quoted.Expr[T] to a T.
A type class for types that can convert a quoted.Expr[T] to a T.
- Converts expression containing literal values to their values:
'{1}->1,'{2}->2, ...- For all primitive types and
String
- Converts an expression that constructs a copy of its value.
- This expression must be some kind of data structure (
Some,List,Either, ...) - Calls to
new XorX.applycan be lifted into its value - Arguments of constructors can be recursively unlifted
- This expression must be some kind of data structure (
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Known subtypes
Default given instances of FromExpr
Default given instances of FromExpr
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Self type
Quotation context provided by a macro expansion or in the scope of scala.quoted.staging.run. Used to perform all operations on quoted Expr or Type.
Quotation context provided by a macro expansion or in the scope of scala.quoted.staging.run. Used to perform all operations on quoted Expr or Type.
It contains the low-level Typed AST API metaprogramming API. This API does not have the static type guarantees that Expr and Type provide. Quotes are generated from an enclosing ${ ... } or scala.staging.run. For example:
import scala.quoted.*
inline def myMacro: Expr[T] =
${ /* (quotes: Quotes) ?=> */ myExpr }
def myExpr(using Quotes): Expr[T] =
'{ f(${ /* (quotes: Quotes) ?=> */ myOtherExpr }) }
}
def myOtherExpr(using Quotes): Expr[U] = '{ ... }
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Self type
A type class for types that can convert a value of T into quoted.Expr[T] an expression that will create a copy of the value.
A type class for types that can convert a value of T into quoted.Expr[T] an expression that will create a copy of the value.
Attributes
Companion
Source
Supertypes
Known subtypes
Default given instances of ToExpr
Default given instances of ToExpr
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Companion
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Supertypes
Self type
Type (or type constructor) T needed contextually when using T in a quoted expression '{... T ...}
Type (or type constructor) T needed contextually when using T in a quoted expression '{... T ...}
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Methods to interact with the current Type[T] in scope
Methods to interact with the current Type[T] in scope
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Supertypes
Self type
Expression representation of literal sequence of expressions.
Expression representation of literal sequence of expressions.
Varargs can be used to create the an expression args that will be used as varargs '{ f($args: _*) } or it can be used to extract all the arguments of the a varargs.
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Self type
Current Quotes in scope
Current Quotes in scope
Usage:
import scala.quoted.*
def myExpr[T](using Quotes): Expr[T] = {
import quotes.reflect.*
???
}
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Source
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