geekrelief
/ macro_nilable.nim
Created
January 22, 2022 19:34
Nim: Check if a type is nilable in a macro.
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| import std/[ macros, strformat ] | |
| proc parseParts(x: NimNode): seq[NimNode] | |
| proc parseDotExpr(x: NimNode): seq[NimNode] = | |
| result.add parseParts(x[0]) | |
| result.add x | |
| proc parseBracketExpr(x: NimNode): seq[NimNode] = | |
| result.add parseParts(x[0]) |
geekrelief
/ here.nim
Last active
June 28, 2024 18:22
A Nim debugEcho with file, line number, and callsite.
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| import std/macros | |
| # calls debugEcho with the lineInfo | |
| macro here*(x: varargs[typed, `$`]):untyped {.noSideEffect.} = | |
| {.cast(noSideEffect), warning[Deprecated]:off.}: # callsite is deprecated, there's no alternative: https://github.com/nim-lang/RFCs/issues/387 | |
| result = newTree(nnkCommand, ident "debugEcho") | |
| result.add newStrLitNode("--- " & x[0].lineInfo & " ---\n") | |
| result.add newStrLitNode(" " & callsite().toStrLit().strVal & " -> \n") | |
| for c in x: | |
| result.add c |
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