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implemented builtin noncopying slice

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Araq 2014-05-02 08:44:03 +02:00
commit d0438540d0
7 changed files with 42 additions and 18 deletions
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5
compiler/parampatterns.nim
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@ -10,7 +10,7 @@
## This module implements the pattern matching features for term rewriting
## macro support.
import strutils, ast, astalgo, types, msgs, idents, renderer, wordrecg
import strutils, ast, astalgo, types, msgs, idents, renderer, wordrecg, trees
# we precompile the pattern here for efficiency into some internal
# stack based VM :-) Why? Because it's fun; I did no benchmarks to see if that
@ -215,6 +215,9 @@ proc isAssignable*(owner: PSym, n: PNode): TAssignableResult =
result = arLValue
of nkObjUpConv, nkObjDownConv, nkCheckedFieldExpr:
result = isAssignable(owner, n.sons[0])
of nkCallKinds:
# builtin slice keeps lvalue-ness:
if getMagic(n) == mSlice: result = isAssignable(owner, n.sons[1])
else:
discard