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This commit adds the ability to parse if else statements to the parser. There is no inferencing or code generation yet.
We introduces the never type to represent a type that is never
instantiated. This is useful for cases where a branch of an if statement
never returns for instance:
```mun
let b = if a {
3
} else {
return;
}
```
In the above case `b` should be assigned the type `int` because the then
branch has type `int` and the else branch has type `never`.
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This commit adds the `MissingElseBranch` and `IncompatibleBranch` diagnostics to inferencing.
The dlls in this repo are build artifacts and should not reside with the source. Where applicable add them manually.
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This was referenced Oct 29, 2019
Wodann
reviewed
Oct 30, 2019
Wodann
approved these changes
Oct 30, 2019
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