diff options
Diffstat (limited to 'lib/macros.nim')
| -rw-r--r-- | lib/macros.nim | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/lib/macros.nim b/lib/macros.nim index 2c71f31c8..2b75a1545 100644 --- a/lib/macros.nim +++ b/lib/macros.nim @@ -1,15 +1,17 @@ # # # Nimrod's Runtime Library -# (c) Copyright 2008 Andreas Rumpf +# (c) Copyright 2009 Andreas Rumpf # # See the file "copying.txt", included in this # distribution, for details about the copyright. # -## This module contains the interface to the compiler's abstract syntax tree. -## Abstract syntax trees should be modified in macros. +## This module contains the interface to the compiler's abstract syntax +## tree (`AST`:idx:). Macros operate on this tree. + +## .. include:: ../doc/astspec.txt #[[[cog #def toEnum(name, elems): @@ -235,3 +237,13 @@ proc newCall*(theProc: string, result.add(newIdentNode(theProc)) result.add(args) +proc nestList*(theProc: TNimrodIdent, + x: PNimrodNode): PNimrodNode {.compileTime.} = + ## nests the list `x` into a tree of call expressions: + ## ``[a, b, c]`` is transformed into ``theProc(a, theProc(c, d))`` + var L = x.len + result = newCall(theProc, x[L-2], x[L-1]) + var a = result + for i in countdown(L-3, 0): + a = newCall(theProc, x[i], copyNimTree(a)) + |