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30 lines
885 B
Nim
30 lines
885 B
Nim
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import macros
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# https://github.com/nim-lang/Nim/issues/4441#issuecomment-230441949
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macro importConst*(cname: untyped, cheader: string, ctype: untyped): untyped =
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# dumpAstGen:
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# var cnameVar {.importc: "cname", header: "cheader".}: ctype
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# let cname* = cnameVar
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result = newStmtList(
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newNimNode(nnkVarSection).add(
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newIdentDefs(
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newNimNode(nnkPragmaExpr).add(
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newIdentNode($cname & "Var"),
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newNimNode(nnkPragma).add(
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newColonExpr(newIdentNode("importc"), newStrLitNode($cname)),
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newColonExpr(newIdentNode("header"), newStrLitNode($cheader))
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)
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),
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newIdentNode($ctype),
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newEmptyNode()
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)
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),
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newNimNode(nnkLetSection).add(
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newIdentDefs(
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postfix(newIdentNode($cname), "*"),
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newEmptyNode(),
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newIdentNode($cname & "Var")
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)
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)
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)
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