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9abd383a2a
* new `macros.genAst`: fixes all issues with `quote do` * add changelog entry * add workaround for https://github.com/nim-lang/Nim/issues/2465#issuecomment-511076669 * add test for #9607 * add kNoExposeLocalInjects option * add test case for nested application of genAst * genAst: automatically call newLit when needed * allow skipping `{}`: genAst: foo * add test that shows this fixes #11986 * add examples showing mixin; add examples showing passing types, macros, templates * move to std/genasts * improve docs
54 lines
1.6 KiB
Nim
54 lines
1.6 KiB
Nim
import std/genasts
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import std/macros
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# Using a enum instead of, say, int, to make apparent potential bugs related to
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# forgetting converting to NimNode via newLit, see bug #9607
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type Foo* = enum kfoo0, kfoo1, kfoo2, kfoo3, kfoo4
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proc myLocalPriv(): auto = kfoo1
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proc myLocalPriv2(): auto = kfoo1
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macro bindme2*(): untyped =
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genAst: myLocalPriv()
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macro bindme3*(): untyped =
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## myLocalPriv must be captured explicitly
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genAstOpt({kDirtyTemplate}, myLocalPriv): myLocalPriv()
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macro bindme4*(): untyped =
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## calling this won't compile because `myLocalPriv` isn't captured
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genAstOpt({kDirtyTemplate}): myLocalPriv()
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macro bindme5UseExpose*(): untyped =
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genAst: myLocalPriv2()
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macro bindme5UseExposeFalse*(): untyped =
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genAstOpt({kDirtyTemplate}): myLocalPriv2()
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# example from bug #7889
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from std/streams import newStringStream, readData, writeData
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macro bindme6UseExpose*(): untyped =
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genAst:
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var tst = "sometext"
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var ss = newStringStream("anothertext")
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writeData(ss, tst[0].addr, 2)
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discard readData(ss, tst[0].addr, 2)
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macro bindme6UseExposeFalse*(): untyped =
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## with `kDirtyTemplate`, requires passing all referenced symbols
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## which can be tedious
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genAstOpt({kDirtyTemplate}, newStringStream, writeData, readData):
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var tst = "sometext"
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var ss = newStringStream("anothertext")
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writeData(ss, tst[0].addr, 2)
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discard readData(ss, tst[0].addr, 2)
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proc locafun1(): auto = "in locafun1"
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proc locafun2(): auto = "in locafun2"
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# locafun3 in caller scope only
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macro mixinExample*(): untyped =
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genAst:
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mixin locafun1
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(locafun1(), locafun2(), locafun3())
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