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| author | Martin Odersky <odersky@gmail.com> | 2017-03-04 17:27:10 +0100 |
|---|---|---|
| committer | Martin Odersky <odersky@gmail.com> | 2017-03-04 18:28:21 +0100 |
| commit | 353a4d9f17b91d09dea3c9090c7a21e267372abe (patch) | |
| tree | 08e1541da2f277c17da167ee6b9758a3f08e5f90 /docs | |
| parent | 06d3f7aefa620ce006008955203d7f8f8dc7b605 (diff) | |
| download | dotty-353a4d9f17b91d09dea3c9090c7a21e267372abe.tar.gz dotty-353a4d9f17b91d09dea3c9090c7a21e267372abe.tar.bz2 dotty-353a4d9f17b91d09dea3c9090c7a21e267372abe.zip | |
Drop named type parameters in classes
Drop the [type T] syntax, and what's associated to make it work.
Motivation: It's an alternative way of doing things for which there seems
to be little need. The implementation was provisional and bitrotted during
the various iterations to introduce higher-kinded types. So in the end the
complxity-cost for language and compiler was not worth the added benefit
that [type T] parameters provide.
Noe that we still accept _named arguments_ [A = T] in expressions; these are useful
for specifying some parameters and letting others be inferred.
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/docs/internals/syntax.md | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/docs/docs/internals/syntax.md b/docs/docs/internals/syntax.md index b7d5936c2..7f06cdc2a 100644 --- a/docs/docs/internals/syntax.md +++ b/docs/docs/internals/syntax.md @@ -126,7 +126,7 @@ InfixType ::= RefinedType {id [nl] RefinedType} RefinedType ::= WithType {[nl] Refinement} RefinedTypeTree(t, ds) WithType ::= AnnotType {‘with’ AnnotType} (deprecated) AnnotType ::= SimpleType {Annotation} Annotated(t, annot) -SimpleType ::= SimpleType (TypeArgs | NamedTypeArgs) AppliedTypeTree(t, args) +SimpleType ::= SimpleType TypeArgs AppliedTypeTree(t, args) | SimpleType ‘#’ id Select(t, name) | StableId | Path ‘.’ ‘type’ SingletonTypeTree(p) @@ -240,7 +240,7 @@ ArgumentPatterns ::= ‘(’ [Patterns] ‘)’ ### Type and Value Parameters ```ebnf ClsTypeParamClause::= ‘[’ ClsTypeParam {‘,’ ClsTypeParam} ‘]’ -ClsTypeParam ::= {Annotation} [{Modifier} type] [‘+’ | ‘-’] TypeDef(Modifiers, name, tparams, bounds) +ClsTypeParam ::= {Annotation} [‘+’ | ‘-’] TypeDef(Modifiers, name, tparams, bounds) id [HkTypeParamClause] TypeParamBounds Bound(below, above, context) DefTypeParamClause::= ‘[’ DefTypeParam {‘,’ DefTypeParam} ‘]’ |