44e7a7b6c2
* reject to modify type checked AST * add flag to back out * Introduce legacy feature set.
12 lines
239 B
Nim
12 lines
239 B
Nim
discard """
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errormsg: "typechecked nodes may not be modified"
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"""
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import macros
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macro doSomething(arg: typed): untyped =
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echo arg.treeREpr
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result = arg
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result[0] = newCall(bindSym"echo", newLit(1))
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doSomething((echo(1); echo(2)))
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