- Companion:
- object
Value members
Concrete methods
Inherited methods
Is this type the same as that type?
This is the case iff this <:< that
and that <:< this
.
Is this type the same as that type?
This is the case iff this <:< that
and that <:< this
.
- Inherited from:
- Type
The set of abstract term members of this type.
The set of abstract term members of this type.
- Inherited from:
- Type
The set of abstract type members of this type.
The set of abstract type members of this type.
- Inherited from:
- Type
All members of this type. Warning: this can be expensive to compute!
All members of this type. Warning: this can be expensive to compute!
- Inherited from:
- Type
If this is an AndType, the number of factors, 1 for all other types
If this is an AndType, the number of factors, 1 for all other types
- Inherited from:
- Type
This type seen as if it were the type of a member of prefix type pre
declared in class cls
.
This type seen as if it were the type of a member of prefix type pre
declared in class cls
.
- Inherited from:
- Type
The singleton types that must or may be in this type. @see Atoms. Overridden and cached in OrType.
The singleton types that must or may be in this type. @see Atoms. Overridden and cached in OrType.
- Inherited from:
- Type
The base classes of this type as determined by ClassDenotation
in linearization order, with the class itself as first element.
Inherited by all type proxies. Overridden for And and Or types.
Nil
for all other types.
The base classes of this type as determined by ClassDenotation
in linearization order, with the class itself as first element.
Inherited by all type proxies. Overridden for And and Or types.
Nil
for all other types.
- Inherited from:
- Type
The basetype of this type with given class symbol, NoType if base
is not a class.
The basetype of this type with given class symbol, NoType if base
is not a class.
- Inherited from:
- Type
The least class or trait of which this type is a subtype or parameterized instance, or NoSymbol if none exists (either because this type is not a value type, or because superclasses are ambiguous).
The least class or trait of which this type is a subtype or parameterized instance, or NoSymbol if none exists (either because this type is not a value type, or because superclasses are ambiguous).
- Inherited from:
- Type
The least (wrt <:<) set of class symbols of which this type is a subtype
The least (wrt <:<) set of class symbols of which this type is a subtype
- Inherited from:
- Type
The set of distinct symbols referred to by this type, after all aliases are expanded
The set of distinct symbols referred to by this type, after all aliases are expanded
- Inherited from:
- Type
Follow aliases and dereferences LazyRefs, annotated types and instantiated TypeVars until type is no longer alias type, annotated type, LazyRef, or instantiated type variable.
Follow aliases and dereferences LazyRefs, annotated types and instantiated TypeVars until type is no longer alias type, annotated type, LazyRef, or instantiated type variable.
- Inherited from:
- Type
Follow aliases and dereferences LazyRefs and instantiated TypeVars until type is no longer alias type, LazyRef, or instantiated type variable. Goes through annotated types and rewraps annotations on the result.
Follow aliases and dereferences LazyRefs and instantiated TypeVars until type is no longer alias type, LazyRef, or instantiated type variable. Goes through annotated types and rewraps annotations on the result.
- Inherited from:
- Type
Follow non-opaque aliases and dereferences LazyRefs, annotated types and instantiated TypeVars until type is no longer alias type, annotated type, LazyRef, or instantiated type variable.
Follow non-opaque aliases and dereferences LazyRefs, annotated types and instantiated TypeVars until type is no longer alias type, annotated type, LazyRef, or instantiated type variable.
- Inherited from:
- Type
Like dealiasKeepAnnots
, but keeps only refining annotations
Like dealiasKeepAnnots
, but keeps only refining annotations
- Inherited from:
- Type
A denotation containing the declaration(s) in this type with the given name. The result is either a SymDenotation or a MultiDenotation of SymDenotations. The info(s) are the original symbol infos, no translation takes place.
A denotation containing the declaration(s) in this type with the given name. The result is either a SymDenotation or a MultiDenotation of SymDenotations. The info(s) are the original symbol infos, no translation takes place.
- Inherited from:
- Type
The scope of all declarations of this type. Defined by ClassInfo, inherited by type proxies. Empty scope for all other types.
The scope of all declarations of this type. Defined by ClassInfo, inherited by type proxies. Empty scope for all other types.
- Inherited from:
- Type
Widen from constant type to its underlying non-constant base type.
Widen from constant type to its underlying non-constant base type.
- Inherited from:
- Type
If this is a prototype with some ignored component, reveal one more layer of it. Otherwise the type itself.
If this is a prototype with some ignored component, reveal one more layer of it. Otherwise the type itself.
- Inherited from:
- Type
If this is a prototype with some ignored component, reveal it, and deepen the result transitively. Otherwise the type itself.
If this is a prototype with some ignored component, reveal it, and deepen the result transitively. Otherwise the type itself.
- Inherited from:
- Type
Does this type have a supertype with an annotation satisfying given predicate p
?
Does this type have a supertype with an annotation satisfying given predicate p
?
- Inherited from:
- Type
True if this type is an instance of the given cls
or an instance of
a non-bottom subclass of cls
.
True if this type is an instance of the given cls
or an instance of
a non-bottom subclass of cls
.
- Inherited from:
- Type
Approximate this type with a type that does not contain skolem types.
Approximate this type with a type that does not contain skolem types.
- Inherited from:
- Type
Drop annotation of given cls
from this type
Drop annotation of given cls
from this type
- Inherited from:
- Type
Dealias, and if result is a dependent function type, drop the apply
refinement.
Dealias, and if result is a dependent function type, drop the apply
refinement.
- Inherited from:
- Type
If this is a proto type, WildcardType, otherwise the type itself
If this is a proto type, WildcardType, otherwise the type itself
- Inherited from:
- Type
Equality used for hash-consing; uses eq
on all recursive invocations,
except where a BindingType is involved. The latter demand a deep isomorphism check.
Equality used for hash-consing; uses eq
on all recursive invocations,
except where a BindingType is involved. The latter demand a deep isomorphism check.
- Inherited from:
- Type
Compare this == that
, assuming corresponding binders in bs
are equal.
The normal equals
should be equivalent to equals(that, null
). We usually override
equalswhen we override
isoexcept if the
equals` comes from a case class, so it already has the right definition anyway.
Compare this == that
, assuming corresponding binders in bs
are equal.
The normal equals
should be equivalent to equals(that, null
). We usually override
equalswhen we override
isoexcept if the
equals` comes from a case class, so it already has the right definition anyway.
- Inherited from:
- Type
Returns true if there is a part of this type that satisfies predicate p
.
Returns true if there is a part of this type that satisfies predicate p
.
- Inherited from:
- Type
A fallback text representation, if the pattern matching in Printers does not have a case for this showable element
A fallback text representation, if the pattern matching in Printers does not have a case for this showable element
- Inherited from:
- Showable
The final result type of a PolyType, MethodType, or ExprType, after skipping all parameter sections, the type itself for all others.
The final result type of a PolyType, MethodType, or ExprType, after skipping all parameter sections, the type itself for all others.
- Inherited from:
- Type
A denotation containing the declaration(s) in this type with the given
name, as seen from prefix type pre
. Declarations that have a flag
in excluded
are omitted.
A denotation containing the declaration(s) in this type with the given
name, as seen from prefix type pre
. Declarations that have a flag
in excluded
are omitted.
- Inherited from:
- Type
Find the function type in union. If there are multiple function types, NoType is returned.
Find the function type in union. If there are multiple function types, NoType is returned.
- Inherited from:
- Type
Find member of this type with given name
, all required
flags and no excluded
flag and produce a denotation that contains
the type of the member as seen from given prefix pre
.
Find member of this type with given name
, all required
flags and no excluded
flag and produce a denotation that contains
the type of the member as seen from given prefix pre
.
- Inherited from:
- Type
The parameter names in the first parameter section of a generic type or MethodType, Empty list for others
The parameter names in the first parameter section of a generic type or MethodType, Empty list for others
- Inherited from:
- Type
The parameter types in the first parameter section of a generic type or MethodType, Empty list for others
The parameter types in the first parameter section of a generic type or MethodType, Empty list for others
- Inherited from:
- Type
The first parent of this type, AnyRef if list of parents is empty
The first parent of this type, AnyRef if list of parents is empty
- Inherited from:
- Type
Returns true if all parts of this type satisfy predicate p
.
Returns true if all parts of this type satisfy predicate p
.
- Inherited from:
- Type
Performs operation on all parts of this type
Performs operation on all parts of this type
- Inherited from:
- Type
Does the type carry an annotation that is an instance of cls
?
Does the type carry an annotation that is an instance of cls
?
- Inherited from:
- Type
Same as this.classSymbols.contains(cls)
but more efficient
Same as this.classSymbols.contains(cls)
but more efficient
- Inherited from:
- Type
Is the hash
of this type the same for all possible sequences of enclosing binders?
Is the hash
of this type the same for all possible sequences of enclosing binders?
- Inherited from:
- Type
The upper bound of a TypeBounds type, the type itself otherwise
The upper bound of a TypeBounds type, the type itself otherwise
- Inherited from:
- Type
The set of implicit term members of this type
The set of implicit term members of this type
- Value parameters:
- kind
A subset of {Implicit, Given} that specifies what kind of implicit should be returned
- Inherited from:
- Type
True iff symd
is a denotation of a class type parameter and the reference
`
True iff symd
is a denotation of a class type parameter and the reference
`
.` is an actual argument reference, i.e. `pre` is not the ThisType of `symd`'s owner, or a reference to `symd`'s owner.'
- Inherited from:
- Type
Is this a Method or PolyType which has contextual parameters as first value parameter list?
Is this a Method or PolyType which has contextual parameters as first value parameter list?
- Inherited from:
- Type
Is this a higher-kinded type lambda with given parameter variances?
Is this a higher-kinded type lambda with given parameter variances?
- Inherited from:
- Type
Is this type a (neither aliased nor applied nor annotated) reference to class sym
?
Is this type a (neither aliased nor applied nor annotated) reference to class sym
?
- Inherited from:
- Type
Is this a MethodType for which the parameters will not be used?
Is this a MethodType for which the parameters will not be used?
- Inherited from:
- Type
Is some part of the widened version of this type produced as a repair for an error?
Is some part of the widened version of this type produced as a repair for an error?
- Inherited from:
- Type
Is this type produced as a repair for an error?
Is this type produced as a repair for an error?
- Inherited from:
- Type
Is this type exactly Any (no vars, aliases, refinements etc allowed)?
Is this type exactly Any (no vars, aliases, refinements etc allowed)?
- Inherited from:
- Type
Is this type exactly Nothing (no vars, aliases, refinements etc allowed)?
Is this type exactly Nothing (no vars, aliases, refinements etc allowed)?
- Inherited from:
- Type
Is this type exactly Null (no vars, aliases, refinements etc allowed)?
Is this type exactly Null (no vars, aliases, refinements etc allowed)?
- Inherited from:
- Type
Does this type not refer to TypeParamRefs or uninstantiated TypeVars?
Does this type not refer to TypeParamRefs or uninstantiated TypeVars?
- Inherited from:
- Type
Is this a Method or PolyType which has implicit or contextual parameters?
Is this a Method or PolyType which has implicit or contextual parameters?
- Inherited from:
- Type
Is this a match type or a higher-kinded abstraction of one?
Is this a match type or a higher-kinded abstraction of one?
- Inherited from:
- Type
Same as hasClassSmbol(MatchableClass), except that we also follow the constraint bounds of type variables in the constraint.
Same as hasClassSmbol(MatchableClass), except that we also follow the constraint bounds of type variables in the constraint.
- Inherited from:
- Type
Is this type guaranteed not to have null
as a value?
Is this type guaranteed not to have null
as a value?
- Inherited from:
- Type
Is this (an alias of) the scala.Nothing
type?
Is this (an alias of) the scala.Nothing
type?
- Inherited from:
- Type
Is this (an alias of) the scala.Null
type?
Is this (an alias of) the scala.Null
type?
- Inherited from:
- Type
Is this the type of a method with a leading empty parameter list?
Is this the type of a method with a leading empty parameter list?
- Inherited from:
- Type
Is this either not a method at all, or a parameterless method?
Is this either not a method at all, or a parameterless method?
- Inherited from:
- Type
Is this type still provisional? This is the case if the type contains, or depends on, uninstantiated type variables or type symbols that have the Provisional flag set. This is an antimonotonic property - once a type is not provisional, it stays so forever.
Is this type still provisional? This is the case if the type contains, or depends on, uninstantiated type variables or type symbols that have the Provisional flag set. This is an antimonotonic property - once a type is not provisional, it stays so forever.
- Inherited from:
- Type
Is this type a (possibly refined or applied or aliased) type reference to the given type symbol?
Is this type a (possibly refined or applied or aliased) type reference to the given type symbol?
- Inherited from:
- Type
Is this type a (possibly aliased) singleton type?
Is this type a (possibly aliased) singleton type?
- Inherited from:
- Type
Does this type denote a stable reference (i.e. singleton type)?
Does this type denote a stable reference (i.e. singleton type)?
Like in isStableMember, "stability" means idempotence. Rationale: If an expression has a stable type, the expression must be idempotent, so stable types must be singleton types of stable expressions.
- Inherited from:
- Type
Is this type a primitive value type which can be widened to the primitive value type that
?
Is this type a primitive value type which can be widened to the primitive value type that
?
- Inherited from:
- Type
Is this the type of a method that has a repeated parameter type as last parameter type?
Is this the type of a method that has a repeated parameter type as last parameter type?
- Inherited from:
- Type
Is this
isomorphic to that
, assuming pairs of matching binders bs
?
It is assumed that this.ne(that)
.
Is this
isomorphic to that
, assuming pairs of matching binders bs
?
It is assumed that this.ne(that)
.
- Inherited from:
- Type
The lower bound of a TypeBounds type, the type itself otherwise
The lower bound of a TypeBounds type, the type itself otherwise
- Inherited from:
- Type
If this normalizes* to a refinement type that has a refinement for name
(which might be followed
by other refinements), and the refined info is a type alias, return the alias,
otherwise return NoType. Used to reduce types of the form
If this normalizes* to a refinement type that has a refinement for name
(which might be followed
by other refinements), and the refined info is a type alias, return the alias,
otherwise return NoType. Used to reduce types of the form
P { ... type T = / += / -= U ... } # T
to just U. Does not perform the reduction if the resulting type would contain a reference to the "this" of the current refined type, except in the following situation
(1) The "this" reference can be avoided by following an alias. Example:
P { type T = String, type R = P{...}.T } # R --> String
(*) normalizes means: follow instantiated typevars and aliases.
- Inherited from:
- Type
Map function f
over elements of an AndType, rebuilding with function g
Map function f
over elements of an AndType, rebuilding with function g
- Inherited from:
- Type
Map function f
over elements of an OrType, rebuilding with function g
Map function f
over elements of an OrType, rebuilding with function g
- Inherited from:
- Type
Is this type close enough to that type so that members with the two types would override each other? This means:
Is this type close enough to that type so that members with the two types would override each other? This means:
- Either both types are polytypes with the same number of type parameters and their result types match after renaming corresponding type parameters
- Or both types are method types with =:=-equivalent(*) parameter types and matching result types after renaming corresponding parameter types if the method types are dependent.
- Or both types are =:=-equivalent
- Or phase.erasedTypes is false, and neither type takes term or type parameters.
(*) when matching with a Java method, we also regard Any and Object as equivalent parameter types.
Under explicit nulls, this function will always use unsafe-nulls semamtics to
check the types. This is because we are using a relaxed rule (ignoring Null
types)
to check overriding Java methods.
- Inherited from:
- Type
This is the same as matches
except that it also matches => T with T and
vice versa.
This is the same as matches
except that it also matches => T with T and
vice versa.
- Inherited from:
- Type
The member of this type with the given name
The member of this type with the given name
- Inherited from:
- Type
The member with given name
and required and/or excluded flags
The member with given name
and required and/or excluded flags
- Inherited from:
- Type
- Inherited from:
- Type
The info of sym
, seen as a member of this type.
The info of sym
, seen as a member of this type.
- Inherited from:
- Type
The set of names of members of this type that pass the given name filter
when seen as members of pre
. More precisely, these are all
of members name
such that keepOnly(pre, name)
is true
.
The set of names of members of this type that pass the given name filter
when seen as members of pre
. More precisely, these are all
of members name
such that keepOnly(pre, name)
is true
.
- Inherited from:
- Type
The set of members of this type that have all of required
flags but none of excluded
flags set.
The set of members of this type that have all of required
flags but none of excluded
flags set.
- Inherited from:
- Type
The parts of this type which are type or term refs and which
satisfy predicate p
.
The parts of this type which are type or term refs and which
satisfy predicate p
.
- Value parameters:
- p
The predicate to satisfy
- Inherited from:
- Type
A prefix-less refined this or a termRef to a new skolem symbol that has the given type as info.
A prefix-less refined this or a termRef to a new skolem symbol that has the given type as info.
- Inherited from:
- Type
The set of abstract type members of this type.
The set of abstract type members of this type.
- Inherited from:
- Type
A denotation containing the non-private declaration(s) in this type with the given name
A denotation containing the non-private declaration(s) in this type with the given name
- Inherited from:
- Type
The non-private member of this type with the given name.
The non-private member of this type with the given name.
- Inherited from:
- Type
The result of normalization using tryNormalize
, or the type itself if
tryNormlize yields NoType
The result of normalization using tryNormalize
, or the type itself if
tryNormlize yields NoType
- Inherited from:
- Type
The normalized prefix of this type is:
For an alias type, the normalized prefix of its alias
For all other named type and class infos: the prefix.
Inherited by all other type proxies.
NoType
for all other types.
The normalized prefix of this type is:
For an alias type, the normalized prefix of its alias
For all other named type and class infos: the prefix.
Inherited by all other type proxies.
NoType
for all other types.
- Inherited from:
- Type
Does this type occur as a part of type that
?
Does this type occur as a part of type that
?
- Inherited from:
- Type
This type, if it exists, otherwise that
type
This type, if it exists, otherwise that
type
- Inherited from:
- Type
If this is a OrType, the number of factors if that match soft
,
1 for all other types.
If this is a OrType, the number of factors if that match soft
,
1 for all other types.
- Inherited from:
- Type
Is this type a legal type for member sym1
that overrides another
member sym2
of type that
? This is the same as <:<
, except that
Is this type a legal type for member sym1
that overrides another
member sym2
of type that
? This is the same as <:<
, except that
- Value parameters:
- checkClassInfo
if true we check that ClassInfos are within bounds of abstract types
- matchLoosely
if true the types
=> T
and()T
are seen as overriding each other.
- Inherited from:
- Type
The parameter types of a PolyType or MethodType, Empty list for others
The parameter types of a PolyType or MethodType, Empty list for others
- Inherited from:
- Type
The parameter names of a PolyType or MethodType, Empty list for others
The parameter names of a PolyType or MethodType, Empty list for others
- Inherited from:
- Type
The least (wrt <:<) set of symbols satisfying the include
predicate of which this type is a subtype
The least (wrt <:<) set of symbols satisfying the include
predicate of which this type is a subtype
- Inherited from:
- Type
The full parent types, including all type arguments
The full parent types, including all type arguments
- Inherited from:
- Type
Returns the set of methods that are abstract and do not overlap with any of java.lang.Object methods.
Returns the set of methods that are abstract and do not overlap with any of java.lang.Object methods.
Conceptually, a SAM (functional interface) has exactly one abstract method. If an interface declares an abstract method overriding one of the public methods of java.lang.Object, that also does not count toward the interface's abstract method count.
- Returns:
the set of methods that are abstract and do not match any of java.lang.Object
- See also:
- Inherited from:
- Type
this & that
, but handle CyclicReferences by falling back to safe_&
.
this & that
, but handle CyclicReferences by falling back to safe_&
.
- Inherited from:
- Type
If this is a repeated type, its element type, otherwise the type itself
If this is a repeated type, its element type, otherwise the type itself
- Inherited from:
- Type
The resultType of a LambdaType, or ExprType, the type itself for others
The resultType of a LambdaType, or ExprType, the type itself for others
- Inherited from:
- Type
If this is an ignored proto type, its underlying type, otherwise the type itself
If this is an ignored proto type, its underlying type, otherwise the type itself
- Inherited from:
- Type
Safer version of &
.
Safer version of &
.
This version does not simplify the bounds of the intersection of
two TypeBounds. The simplification done by &
requires subtyping checks
which may end up calling &
again, in most cases this should be safe
but because of F-bounded types, this can result in an infinite loop
(which will be masked unless -Yno-deep-subtypes
is enabled).
pos/i536 demonstrates that the infinite loop can also involve lower bounds.
- Inherited from:
- Type
The type <this . sym>, reduced if possible
The type <this . sym>, reduced if possible
- Inherited from:
- Type
The type <this . name> with given denotation, reduced if possible.
The type <this . name> with given denotation, reduced if possible.
- Inherited from:
- Type
The type <this . name> , reduced if possible
The type <this . name> , reduced if possible
- Inherited from:
- Type
The string representation of this showable element.
The string representation of this showable element.
- Inherited from:
- Showable
The string representation with each line after the first one indented by the given given margin (in spaces).
The string representation with each line after the first one indented by the given given margin (in spaces).
- Inherited from:
- Showable
The summarized string representation of this showable element. Recursion depth is limited to some smallish value. Default is Config.summarizeDepth.
The summarized string representation of this showable element. Recursion depth is limited to some smallish value. Default is Config.summarizeDepth.
- Inherited from:
- Showable
Utility method to show the underlying type of a TypeProxy chain together with the proxy type itself.
Utility method to show the underlying type of a TypeProxy chain together with the proxy type itself.
- Inherited from:
- Type
The signature of this type. This is by default NotAMethod, but is overridden for PolyTypes, MethodTypes, and TermRef types. (the reason why we deviate from the "final-method-with-pattern-match-in-base-class" pattern is that method signatures use caching, so encapsulation is improved using an OO scheme).
The signature of this type. This is by default NotAMethod, but is overridden for PolyTypes, MethodTypes, and TermRef types. (the reason why we deviate from the "final-method-with-pattern-match-in-base-class" pattern is that method signatures use caching, so encapsulation is improved using an OO scheme).
- Inherited from:
- Type
A simplified version of this type which is equivalent wrt =:= to this type. This applies a typemap to the type which (as all typemaps) follows type variable instances and reduces typerefs over refined types. It also
A simplified version of this type which is equivalent wrt =:= to this type. This applies a typemap to the type which (as all typemaps) follows type variable instances and reduces typerefs over refined types. It also
- re-evaluates all occurrences of And/OrType with &/| because what was a union or intersection of type variables might be a simpler type after the type variables are instantiated.
- maps poly params in the current constraint set back to their type vars.
- forces match types to be fully defined and tries to normalize them.
NOTE: Simplifying an intersection type might change its erasure (for
example, the Java erasure of Object & Serializable
is Object
,
but its simplification is Serializable
). This means that simplification
should never be used in a MethodicType
, because that could
lead to a different signature
. Since this isn't very useful anyway,
this method handles this by never simplifying inside a MethodicType
.
- Inherited from:
- Type
Remove all AnnotatedTypes wrapping this type.
Remove all AnnotatedTypes wrapping this type.
- Inherited from:
- Type
Map a TypeVar to either its instance if it is instantiated, or its origin, if not, until the result is no longer a TypeVar. Identity on all other types.
Map a TypeVar to either its instance if it is instantiated, or its origin, if not, until the result is no longer a TypeVar. Identity on all other types.
- Inherited from:
- Type
Substitute all types of the form TypeParamRef(from, N)
by
TypeParamRef(to, N)
.
Substitute all types of the form TypeParamRef(from, N)
by
TypeParamRef(to, N)
.
- Inherited from:
- Type
Substitute all types that refer in their symbol attribute to
one of the symbols in from
by the corresponding types in to
.
Substitute all types that refer in their symbol attribute to
one of the symbols in from
by the corresponding types in to
.
- Inherited from:
- Type
Substitute all occurrences of symbols in from
by corresponding types in to
.
Unlike for subst
, the to
types can be type bounds. A TypeBounds target
will be replaced by range that gets absorbed in an approximating type map.
Substitute all occurrences of symbols in from
by corresponding types in to
.
Unlike for subst
, the to
types can be type bounds. A TypeBounds target
will be replaced by range that gets absorbed in an approximating type map.
- Inherited from:
- Type
Substitute a bound type by some other type
Substitute a bound type by some other type
- Inherited from:
- Type
Substitute bound types by some other types
Substitute bound types by some other types
- Inherited from:
- Type
Substitute all occurrences of RecThis(binder)
by tp
Substitute all occurrences of RecThis(binder)
by tp
- Inherited from:
- Type
Substitute all occurrences of symbols in from
by references to corresponding symbols in to
Substitute all occurrences of symbols in from
by references to corresponding symbols in to
- Inherited from:
- Type
Substitute all occurrences of This(cls)
by tp
Substitute all occurrences of This(cls)
by tp
- Inherited from:
- Type
As substThis, but only is class is a static owner (i.e. a globally accessible object)
As substThis, but only is class is a static owner (i.e. a globally accessible object)
- Inherited from:
- Type
The closest supertype of this type. This is the same as underlying
,
except that
The closest supertype of this type. This is the same as underlying
,
except that
- instead of a TyperBounds type it returns its upper bound, and
- for applied types it returns the upper bound of the constructor re-applied to the arguments.
- Inherited from:
- TypeProxy
The term symbol associated with the type
The term symbol associated with the type
- Inherited from:
- Type
Turn type into a function type.
Turn type into a function type.
- Value parameters:
- dropLast
The number of trailing parameters that should be dropped when forming the function type.
- Inherited from:
- Type
Same as superType, except for two differences:
Same as superType, except for two differences:
- opaque types are treated as transparent aliases
- applied type are matchtype-reduced if possible
Note: the reason to reduce match type aliases here and not in superType
is that superType
is context-independent and cached, whereas matchtype
reduction depends on context and should not be cached (at least not without
the very specific cache invalidation condition for matchtypes).
- Inherited from:
- TypeProxy
The set of type alias members of this type
The set of type alias members of this type
- Inherited from:
- Type
The type constructor of an applied type, otherwise the type itself
The type constructor of an applied type, otherwise the type itself
- Inherited from:
- Type
The type parameter with given name
. This tries first decls
in order not to provoke a cycle by forcing the info. If that yields
no symbol it tries member
as an alternative.
The type parameter with given name
. This tries first decls
in order not to provoke a cycle by forcing the info. If that yields
no symbol it tries member
as an alternative.
- Inherited from:
- Type
The number of applications and refinements in this type, after all aliases are expanded
The number of applications and refinements in this type, after all aliases are expanded
- Inherited from:
- Type
The type symbol associated with the type
The type symbol associated with the type
- Inherited from:
- Type
If this is a (possibly aliased, annotated, and/or parameterized) reference to a class, the class type ref, otherwise NoType.
If this is a (possibly aliased, annotated, and/or parameterized) reference to a class, the class type ref, otherwise NoType.
- Value parameters:
- refinementOK
If
true
we also skip refinements.
- Inherited from:
- Type
Useful for diagnostics: The underlying type if this type is a type proxy, otherwise NoType
Useful for diagnostics: The underlying type if this type is a type proxy, otherwise NoType
- Inherited from:
- Type
The iterator of underlying types as long as type is a TypeProxy. Useful for diagnostics
The iterator of underlying types as long as type is a TypeProxy. Useful for diagnostics
- Inherited from:
- Type
Is this type unusable for implicit search or overloading resolution since it has embedded errors that can match anything? This is weaker and more ad-hoc than isErroneous. The main differences are that we always consider aliases (since these are relevant for inference or resolution) but never consider prefixes (since these often do not constrain the search space anyway).
Is this type unusable for implicit search or overloading resolution since it has embedded errors that can match anything? This is weaker and more ad-hoc than isErroneous. The main differences are that we always consider aliases (since these are relevant for inference or resolution) but never consider prefixes (since these often do not constrain the search space anyway).
- Inherited from:
- Type
Widen from singleton type to its underlying non-singleton
base type by applying one or more underlying
dereferences,
Also go from => T to T.
Identity for all other types. Example:
Widen from singleton type to its underlying non-singleton
base type by applying one or more underlying
dereferences,
Also go from => T to T.
Identity for all other types. Example:
class Outer { class C ; val x: C } def o: Outer <o.x.type>.widen = o.C
- Inherited from:
- Type
Perform successive widenings and dealiasings until none can be applied anymore
Perform successive widenings and dealiasings until none can be applied anymore
- Inherited from:
- Type
Perform successive widenings and dealiasings while rewrapping annotations, until none can be applied anymore
Perform successive widenings and dealiasings while rewrapping annotations, until none can be applied anymore
- Inherited from:
- Type
Perform successive widenings and dealiasings while rewrapping refining annotations, until none can be applied anymore
Perform successive widenings and dealiasings while rewrapping refining annotations, until none can be applied anymore
- Inherited from:
- Type
Widen from ExprType type to its result type. (Note: no stripTypeVar needed because TypeVar's can't refer to ExprTypes.)
Widen from ExprType type to its result type. (Note: no stripTypeVar needed because TypeVar's can't refer to ExprTypes.)
- Inherited from:
- Type
Widen type if it is unstable (i.e. an ExprType, or TermRef to unstable symbol
Widen type if it is unstable (i.e. an ExprType, or TermRef to unstable symbol
- Inherited from:
- Type
Widen from singleton type to its underlying non-singleton
base type by applying one or more underlying
dereferences.
Widen from singleton type to its underlying non-singleton
base type by applying one or more underlying
dereferences.
- Inherited from:
- Type
Widen all top-level singletons reachable by dealiasing and going to the operands of & and |. Overridden and cached in OrType.
Widen all top-level singletons reachable by dealiasing and going to the operands of & and |. Overridden and cached in OrType.
- Inherited from:
- Type
If this is a skolem, its underlying type, otherwise the type itself
If this is a skolem, its underlying type, otherwise the type itself
- Inherited from:
- Type
Widen from TermRef to its underlying non-termref base type, while also skipping Expr types.
Widen from TermRef to its underlying non-termref base type, while also skipping Expr types.
- Inherited from:
- Type
Widen this type and if the result contains embedded soft union types, replace them by their joins. "Embedded" means: inside type lambdas, intersections or recursive types, in prefixes of refined types, or in hard union types. If an embedded soft union is found, we first try to simplify or eliminate it by re-lubbing it while allowing type parameters to be constrained further. Any remaining union types are replaced by their joins.
Widen this type and if the result contains embedded soft union types, replace them by their joins. "Embedded" means: inside type lambdas, intersections or recursive types, in prefixes of refined types, or in hard union types. If an embedded soft union is found, we first try to simplify or eliminate it by re-lubbing it while allowing type parameters to be constrained further. Any remaining union types are replaced by their joins.
For instance, if A
is an unconstrained type variable, then
ArrayBuffer[Int] | ArrayBuffer[A]
is approximated by constraining A
to be =:= to Int
and returning ArrayBuffer[Int]
instead of ArrayBuffer[? >: Int | A <: Int & A]
Exception (if -YexplicitNulls
is set): if this type is a nullable union (i.e. of the form T | Null
),
then the top-level union isn't widened. This is needed so that type inference can infer nullable types.
- Inherited from:
- Type