A strawman for aggregate literals #21993
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A test case that shows that we can have an "inline type class" that allows to use a typeclass-based scheme for sequence literals where instances can be created with macros.
Also: Move test to run
We now don't try to instantiate selected type variables. Instead, we use a default as fallback if the expected type is underspecified according to the definition in Implicits. This is simpler and more expressive.
odersky
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From the doc I understand that implicit conversions are not applicable. Is weak conformance applicable? |
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The successor of weak conformance (int literal widening) is usually applicable. That follows from the fact that SeqLiterals expand to varargs and varargs do perform that widening. |
tgodzik
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Nov 25, 2024
| @@ -278,6 +278,7 @@ SimpleExpr ::= SimpleRef | |||
| | ‘new’ ConstrApp {‘with’ ConstrApp} [TemplateBody] New(constr | templ) | |||
| | ‘new’ TemplateBody | |||
| | ‘(’ ExprsInParens ‘)’ Parens(exprs) | |||
| | ‘[’ ExprInBrackets ‘)’ SeqLiteral(exprs, TypeTree()) | |||
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| | ‘[’ ExprInBrackets ‘)’ SeqLiteral(exprs, TypeTree()) | |
| | ‘[’ ExprInBrackets ‘]’ SeqLiteral(exprs, TypeTree()) |
just noticed while having a look
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A test case that shows that we can have an "inline type class" that allows to use a typeclass-based scheme for sequence literals where instances can be created with macros.