# parampatterns

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

# Imports

ast, types, msgs, idents, renderer, wordrecg, trees, options

# Types

    TAliasRequest = enum
      aqNone = 1, aqShouldAlias, aqNoAlias

  Source Edit

    TSideEffectAnalysis = enum
      seUnknown, seSideEffect, seNoSideEffect

  Source Edit

    TAssignableResult = enum
      arNone, arLValue, arLocalLValue, arDiscriminant, arLentValue, arStrange

  Source Edit

# Consts

    MaxStackSize = 64

  max required stack size by the VM Source Edit

# Procs

    proc whichAlias(p: PSym): TAliasRequest {...}{.raises: [], tags: [].}

  Source Edit

    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: [].}

  Source Edit

    proc exprRoot(n: PNode): PSym {...}{.raises: [], tags: [].}

  Source Edit

    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].}

  Source Edit

    proc matchNodeKinds(p, n: PNode): bool {...}{.raises: [Exception, ERecoverableError],
        tags: [RootEffect].}

  Source Edit