ExprMatchModule (original) (raw)

scala.quoted.runtime.QuoteMatching.ExprMatchModule

Members list

Pattern matches an the scrutineeExpr against the patternExpr and returns a tuple with the matched holes if successful.

Pattern matches an the scrutineeExpr against the patternExpr and returns a tuple with the matched holes if successful.

Examples:

• ExprMatch.unapply('{ f(0, myInt) })('{ f(0, myInt) }, _) will return Some(()) (where () is a tuple of arity 0)
• ExprMatch.unapply('{ f(0, myInt) })('{ f(patternHole[Int], patternHole[Int]) }, _) will return Some(Tuple2('{0}, '{ myInt }))
• ExprMatch.unapply('{ f(0, "abc") })('{ f(0, patternHole[Int]) }, _) will return None due to the mismatch of types in the hole

Holes:

• scala.quoted.runtime.Patterns.patternHole[T]: hole that matches an expression x of type Expr[U] if U <:< T and returns x as part of the match.

Value parameters

pattern

Expr[Any] containing the pattern tree

scrutinee

Expr[Any] on which we are pattern matching

Attributes

Returns

None if it did not match, Some(tup) if it matched where tup contains `Expr[Ti]``

Source

QuoteMatching.scala

In this article

• Attributes
• Members list
  • Value members
    * Abstract methods