Thanks to @juancarlospaco, we now have [Regular Expressions for the JavaScript
target](https://nim-lang.github.io/Nim/jsre.html).
In `jsre` module above the runtime regex constructor is supported but the
compile time constructor is not. Compile time constructor in javascript looks
like this:
let re = /ab+c/;
Run
My experiments:
**jsrex1.nim**
import jsre
func re*(pattern: cstring): RegExp {.importjs: "/#/".}
let re1 = re"abc" # in js: var re1 = /"abc"/
echo re1.test("abcde") # should be true but it is false
Run
compiles, runs and gives wrong results since it builds the wrong regex
(`/"abc"/` instead of `/abc/`).
**jsrex2.nim**
import jsre
template re*(pattern: string) = {.emit: ["""/""", pattern, """/"""] .}
let re1: RegExp = re"abc" # Error: expression ' {.emit: ["""/""", r"abc",
"""/"""].}' has no type (or is ambiguous)
Run
does not compile since emit section does not have a type.
**jsrex3.nim**
import jsre
func re*(pattern: cstring): RegExp {.importjs: "/$#/".}
let re1 = re"abc" # in js: var re1_623017 = "abc"./re/();
# it will give SyntaxError in Javascript
Run
compiles but raises syntaxerror in JS. I did not expect this to work but I was
a bit surprised by the results in JS code.
Is there a way to make this work?
