This module implements the pattern matching features for term rewriting macro support.


TAliasRequest = enum
  aqNone = 1, aqShouldAlias, aqNoAlias
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TSideEffectAnalysis = enum
  seUnknown, seSideEffect, seNoSideEffect
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TAssignableResult = enum
  arNone, arLValue, arLocalLValue, arDiscriminant, arLentValue, arStrange
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MaxStackSize = 64
max required stack size by the VM   Source Edit


proc whichAlias(p: PSym): TAliasRequest {...}{.raises: [], tags: [].}
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proc semNodeKindConstraints(n: PNode; conf: ConfigRef; start: Natural): PNode {...}{.
    raises: [Exception, ValueError, IOError, ERecoverableError],
    tags: [RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect].}
does semantic checking for a node kind pattern and compiles it into an efficient internal format.   Source Edit
proc checkForSideEffects(n: PNode): TSideEffectAnalysis {...}{.raises: [], tags: [].}
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proc exprRoot(n: PNode): PSym {...}{.raises: [], tags: [].}
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proc isAssignable(owner: PSym; n: PNode; isUnsafeAddr = false): TAssignableResult {...}{.
    raises: [Exception, ERecoverableError], tags: [RootEffect].}
'owner' can be nil!   Source Edit
proc isLValue(n: PNode): bool {...}{.raises: [Exception, ERecoverableError],
                                tags: [RootEffect].}
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proc matchNodeKinds(p, n: PNode): bool {...}{.raises: [Exception, ERecoverableError],
    tags: [RootEffect].}
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