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macros: Introduce sameType(a, b) for node types

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Previously introduced node comparison `==` was working somehow wrong on nodes
returned from getType(a), comparing just ids of the symbols.

Recently introduced `==` change 47dce26886
started comparing symbol nodes pointer-wise, thus strictly. Since getType(a)
always creates new symbol pointing to the type, comparing two such nodes using
`==` always returns false, even they point to the same type.

That is why we need a new sameType macro to be able to tell if these nodes
point to the same type.
This commit is contained in:
Adam Strzelecki 2015-07-01 20:11:09 +02:00
commit 1a0417fbe0
6 changed files with 54 additions and 3 deletions
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3
compiler/ast.nim
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@ -587,7 +587,8 @@ type
mNSetFloatVal, mNSetSymbol, mNSetIdent, mNSetType, mNSetStrVal, mNLineInfo,
mNNewNimNode, mNCopyNimNode, mNCopyNimTree, mStrToIdent, mIdentToStr,
mNBindSym, mLocals, mNCallSite,
mEqIdent, mEqNimrodNode, mNHint, mNWarning, mNError,
mEqIdent, mEqNimrodNode, mSameNodeType,
mNHint, mNWarning, mNError,
mInstantiationInfo, mGetTypeInfo, mNGenSym
# things that we can evaluate safely at compile time, even if not asked for it: