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Diffstat (limited to 'spec/06-expressions.md')
| -rw-r--r-- | spec/06-expressions.md | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/spec/06-expressions.md b/spec/06-expressions.md index 30ad73a3cd..1ecba5adf1 100644 --- a/spec/06-expressions.md +++ b/spec/06-expressions.md @@ -1426,9 +1426,14 @@ Let $\mathscr{B}$ be the set of alternatives in $\mathscr{A}$ that are [_applica to expressions $(e_1 , \ldots , e_n)$ of types $(\mathit{shape}(e_1) , \ldots , \mathit{shape}(e_n))$. If there is precisely one alternative in $\mathscr{B}$, that alternative is chosen. -Otherwise, let $S_1 , \ldots , S_m$ be the vector of types obtained by -typing each argument with an undefined expected type. For every -member $m$ in $\mathscr{B}$ one determines whether it is applicable +Otherwise, let $S_1 , \ldots , S_m$ be the list of types obtained by typing each argument as follows. +An argument `$e_i$` of the shape `($p_1$: $T_1 , \ldots , p_n$: $T_n$) => $b$` where one of the `$T_i$` is missing, +i.e., a function literal with a missing parameter type, is typed with an expected function type that +propagates the least upper bound of the fully defined types of the corresponding parameters of +the ([SAM-converted](#sam-conversion)) function types specified by the `$i$`th argument type found in each alternative. +All other arguments are typed with an undefined expected type. + +For every member $m$ in $\mathscr{B}$ one determines whether it is applicable to expressions ($e_1 , \ldots , e_m$) of types $S_1, \ldots , S_m$. It is an error if none of the members in $\mathscr{B}$ is applicable. If there is one |