'_' can only appear in a pattern or on the left side of an assignment

Originator:neocool2
Number:rdar://20874094 Date Originated:08-May-2015 06:50 PM
Status:Open Resolved:
Product:Developer Tools Product Version:Apple Swift version 1.2 (swiftlang-602.0.49.6 clang-602.0.49)
Classification:Other Bug Reproducible:Always
 
Summary:

This piece of code doesn’t compile:

```
#!/usr/bin/xcrun swift
 
let _ = 2
let x = _ / 2
println(x)
```

Steps to Reproduce:

Compile the given example.

Expected Results:

It compiles.

Actual Results:

$ ./underscore.swift 
./underscore.swift:4:9: error: '_' can only appear in a pattern or on the left side of an assignment
let x = _ / 2
        ^

This seems kinda arbitrary — why allow declaring a variable that only be used in a narrow context?

Regression: -

Notes: -

Comments


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