Files
Nim/tests/macros/tmacrostmt.nim
2017-07-25 09:28:23 +02:00

27 lines
582 B
Nim

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