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ab780f66ef
This alters the DFA control flow graph generation for case statments. Gotos are now generated as a chained link, this ensures that evaluation of variant branches collapses as early as possible, without hitting the 2k call limit.
33 lines
709 B
Nim
33 lines
709 B
Nim
discard """
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cmd: '''nim c --gc:arc $file'''
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output: '''
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other
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'''
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"""
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import std/macros
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macro bigCaseStmt(arg: untyped): untyped =
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result = nnkCaseStmt.newTree(arg)
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# try to change 2000 to a bigger value if it doesn't crash
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for x in 0 ..< 2000:
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result.add nnkOfBranch.newTree(newStrLitNode($x), newStrLitNode($x))
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result.add nnkElse.newTree(newStrLitNode("other"))
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macro bigIfElseExpr(): untyped =
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result = nnkIfExpr.newTree()
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for x in 0 ..< 1000:
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result.add nnkElifExpr.newTree(newLit(false), newStrLitNode($x))
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result.add nnkElseExpr.newTree(newStrLitNode("other"))
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proc test(arg: string): string =
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echo bigIfElseExpr()
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result = bigCaseStmt(arg)
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discard test("test")
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