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27 lines
575 B
Nim
27 lines
575 B
Nim
import macros
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macro case_token(n: stmt): stmt {.immediate.} =
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# creates a lexical analyzer from regular expressions
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# ... (implementation is an exercise for the reader :-)
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nil
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case_token: # this colon tells the parser it is a macro statement
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of r"[A-Za-z_]+[A-Za-z_0-9]*":
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return tkIdentifier
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of r"0-9+":
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return tkInteger
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of r"[\+\-\*\?]+":
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return tkOperator
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else:
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return tkUnknown
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case_token: inc i
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#bug #488
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macro foo: stmt =
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var exp = newCall("whatwhat", newIntLitNode(1))
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if compiles(getAst(exp)): return exp
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else: echo "Does not compute!"
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foo()
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