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Nim is a statically typed compiled systems programming language. It combines successful concepts from mature languages like Python, Ada and Modula. Its design focuses on efficiency, expressiveness, an...

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seq and array seems to be a special case ### Example ```nim type Seq[U] = seq[U] proc foo(s:typedesc[seq]) = echo "seq works" proc foo(s:typedesc[Seq]) = echo "Seq works" Seq.foo #works...

SslContext from net.newContext() leaks memory when destroyed. ### Example ```nim import std/net proc main() = for i in 1 .. 4: let ctx = newContext() main() ``` ### Current Output...

Severe
Standard Library

### Example ```nim {.experimental: "views".} type Foo = object value: openArray[string] proc main(): auto = let a = ["1", "2", "3"] let foo = Foo(value: a.toOpenArray(0, 2)) return foo echo...

View Types

ref https://forum.nim-lang.org/t/12537#77311

Seems to `when nimvm` doesn't work properly with fatal pragma. See [original forum thread](https://forum.nim-lang.org/t/9214) with useful comments! ### Example ```nim template gen_str_in_ct_1: string = when nimvm: "sisix dev" else: {.fatal:...

### Example ```nim import std/macros proc withTypedesc(T: typedesc): T = discard macro genVar(name: untyped) = newVarStmt( name, newCall( bindSym("withTypedesc"), bindSym "int" ) ) genVar foo echo foo ``` https://play.nim-lang.org/#ix=4448 ###...

Semantic Analysis
Macros

### What happened? Originally described in https://github.com/pragmagic/vscode-nim/issues/198 ```nim type All = enum a1 a2 b1 b2 A = range[a1..a2] B = range[b1..b2] proc test(a: A) = echo a test(b1) ```...

Error Messages

### What happened? Project do not compiles. Internal error reported. ### Nim Version Nim Compiler Version 1.6.6 [Linux: amd64] Compiled at 2022-07-14 Copyright (c) 2006-2021 by Andreas Rumpf ### Current...

Compiler Crash
stale

### Description This works fine: ```nim type Rect = tuple x, y, w, h: cint proc rect(x, y: cint; w = cint(0), h = cint(0)): Rect = result.x = x...

const
works_but_needs_test_case

### Description ```nim type PBOption[defaultValue: static[auto]] = object some: bool value: typeof(defaultValue) Type1* = object a: PBOption[default(ref Type2)] Type2* = object a: PBOption[default(ref Type1)] ``` ### Nim Version Nim Compiler...

Recursive Types