String interpolation in raw string may be broken

[lenaing]

Hello !

V version: V 0.1.22 3449a8b
OS : Linux 4.19.0-6-amd64 #1 SMP Debian 4.19.67-2+deb10u1 (2019-09-20) x86_64 GNU/Linux

What did you do ?
I tried to use a variable in raw string with interpolation.
I'm not sure if it should break or not. I believe that it should work as normal string interpolation ?

fn main() {
    hello := 'world'
    println('hello\n$hello')
    println(r'hello\n$hello')
}

What did you expect to see?

$ v run test.v
hello
world
hello\nworld

What did you see instead?

$ v run test.v 
check()
next token = `hello`
addr2line: 'v': No such file
v(+0x3a12b) [0x55aa0d33512b]
addr2line: 'v': No such file
v(+0x2216b) [0x55aa0d31d16b]
addr2line: 'v': No such file
v(+0x1f627) [0x55aa0d31a627]
addr2line: 'v': No such file
v(+0x3f813) [0x55aa0d33a813]
addr2line: 'v': No such file
v(+0x44b04) [0x55aa0d33fb04]
addr2line: 'v': No such file
v(+0x4454c) [0x55aa0d33f54c]
addr2line: 'v': No such file
v(+0x44271) [0x55aa0d33f271]
addr2line: 'v': No such file
v(+0x43467) [0x55aa0d33e467]
addr2line: 'v': No such file
v(+0x4375b) [0x55aa0d33e75b]
addr2line: 'v': No such file
v(+0x3df71) [0x55aa0d338f71]
addr2line: 'v': No such file
v(+0x3dcdf) [0x55aa0d338cdf]
addr2line: 'v': No such file
v(+0x3bc2b) [0x55aa0d336c2b]
addr2line: 'v': No such file
v(+0x3b33b) [0x55aa0d33633b]
addr2line: 'v': No such file
v(+0x1deac) [0x55aa0d318eac]
addr2line: 'v': No such file
v(+0x382af) [0x55aa0d3332af]
addr2line: 'v': No such file
v(+0x2c385) [0x55aa0d327385]
addr2line: 'v': No such file
v(+0x2c939) [0x55aa0d327939]
addr2line: 'v': No such file
v(+0x60952) [0x55aa0d35b952]
addr2line: 'v': No such file
v(+0x61f12) [0x55aa0d35cf12]
??:0:                                         | /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb) [0x7f592895f09b]
addr2line: 'v': No such file
v(+0x249a) [0x55aa0d2fd49a]
test.v:4:27: expected `)` but got `$`
    2|     hello := 'world'
    3|     println('hello\n$hello')
    4|     println(r'hello\n$hello')
                                 ^
    5| }

[medvednikov]

Fixed.

[lenaing]

Well, now it does not fails on the '$', but var is still not interpolated, shouldn't it ?

$ v run test.v
hello
world
hello\n$hello

[medvednikov]

No, it's a raw string, no interpolation here.

[medvednikov]

Looks like in Python they can be combined with rf'foo': https://www.python.org/dev/peps/pep-0498/#raw-f-strings

$@"foo" in C#.

I want to keep things simple.

[bitcartel]

I can confirm using V 0.1.22 a6a233d the issue is resolved i.e. no interpolation when using raw string.