[swift-evolution] [Review] SE-0168: Multi-Line String Literals

[BJ Homer]

> Consider these two examples:
> 
> let string_1 = """foo"""
> 
> 
> let string_2 = """
>     foo
>     """
> What’s the intuitive result you’d expect without taking all the long talk from the list into account?
> 
> Personally, I’d say string_1 == string_2 is true.
> 

I think it’s reasonable to expect them to be different, actually. I might call these “single-line” and “multi-line” mode strings. The single-line mode is primarily useful for being able to include unescaped double-quotes in the string. If you’re in multi-line mode, though, it’s reasonable to be thinking about things in terms of “lines”, and having a trailing newline there seems reasonable. For example, I think it’s reasonable to expect this:

let a = """
This is line one
This is line two"
"""

let b = """
This is line three
This is line four
"""

(a + b) == """
This is line one
This is line two
This is line three
This is line four
"""

That seems like a reasonable model to work with multi-line strings.

-BJ
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