Introduce rules to say that missing formal parameter type means dynamic #2163
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…namic, or inferred
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munificent
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Mar 23, 2022
specification/dartLangSpec.tex
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| %% TODO(eernst): Change to \ref{} when inference spec is added. | ||
| Briefly, override inference yields a type computed from the declared types of | ||
| the corresponding parameter of member signatures in superinterfaces, | ||
| or it causes a compile-time error if said types can not be reconciled.% |
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Do you also want to mention inference from initializing formals here too since you include constructors under this umbrella now?
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The language specification definition of function declarations in section 'Function Declarations' has not been updated for a long time. Unfortunately, the definition is inconsistent with the usage of that phrase elsewhere in the spec. With this PR, we're consistently considering a function declaration as a broad concept (e.g., it includes constructors, operators, getters, and external functions).
With a consistently broad definition of function declarations in place, this PR then introduces the rule (in section 'Formal Parameters') that an omitted type annotation on a formal parameter yields the declared type
dynamic, and also mentions that the declared type isn't omitted if it is provided by override inference.