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mini spec: func #1987

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Sep 24, 2024
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mini spec: func #1987

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21 changes: 20 additions & 1 deletion doc/spec-mini.md
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Expand Up @@ -1686,7 +1686,26 @@ println

## Functions

TODO
A function declaration binds an identifier, the function name, to a function.

```go
FunctionDecl = "func" FunctionName Signature [ FunctionBody ] .
FunctionName = identifier .
FunctionBody = Block .
```

If the function's [signature](#function-types) declares result parameters, the function body's statement list must end in a [terminating statement](#terminating-statements).

```go
func IndexRune(s string, r rune) int {
for i, c := range s {
if c == r {
return i
}
}
// invalid: missing return statement
}
```

## Packages

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