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kc3-lang/kc3/doc/1_KC3/1.03_Str.en.md

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  • # 1.03 Str type.

Read-only string of bytes. Use `Str.size` to get the size in bytes
of the string (without NUL terminator). All KC3 strings are bound-
checked according to their size and are NUL terminated.

## 1.03.1 String litterals and interpolation

A string litteral starts and ends with double quotes `"`
or triple quotes `"""` and inside of a string litteral you can use
the `#{expr}` syntax to evaluate `expr` to a `Str` inside of the
litteral. The string litteral is then parsed as a `Call` to `KC3.str`
and not an actual `Str`. At evaluation the arguments to the call
and `KC3.str` gets called concatenating at once all the parts to a
brand new `Str`.

## 1.03.2 Examples

```elixir
ikc3> "123"
"123"
ikc3> type("123")
Str
ikc3> b = 2
2
ikc3> "1#{b}3"
"123"
ikc3> type("1#{b}3")
Str
ikc3> quote "1#{b}3"
"1#{b}3"
ikc3> type(quote "1#{b}3")
Call
ikc3> type(quote quote "1#{b}3")
Quote
```