avail/avail.compiler.instruction/AvailSetOuterVariable

AvailSetOuterVariable

class AvailSetOuterVariable(var relevantTokens: A_Tuple, outerIndex: Int) : AvailInstructionWithIndex

Set the value of a variable found in the function's list of captured outer variables.

Author

Mark van Gulik

Parameters

relevantTokens

The A_Tuple of A_Tokens that are associated with this instruction.

outerIndex

The index of the variable in a function's outer variables.

Constructors

AvailSetOuterVariable

fun AvailSetOuterVariable(relevantTokens: A_Tuple, outerIndex: Int)

Construct a new AvailSetOuterVariable.

Functions

fixUsageFlags

open override fun fixUsageFlags( localData: MutableList<AvailVariableAccessNote?>, outerData: MutableList<AvailVariableAccessNote?>, codeGenerator: AvailCodeGenerator)

The receiver sets the value of an outer variable, so it can't be an outer reference to an argument (they aren't wrapped in a variable).

writeLineNumberDeltasOn

open fun writeLineNumberDeltasOn(encodedLineNumberDeltas: MutableList<Int>, currentLineNumber: Int): Int

Write an entry to the encoded line number deltas for each L1 instruction generated. Most AvailInstructions write a single L1 instruction, so that implementation is here.

writeNybblesOn

open override fun writeNybblesOn(aStream: NybbleOutputStream)

Write nybbles representing this instruction to the NybbleOutputStream.

Properties

index

val index: Int

A generic index to be interpreted by subclasses. Must be non-negative.

isOuterUse

open override val isOuterUse: Boolean

true iff this instruction is a use of an outer variable.

lineNumber

val lineNumber: Int

Answer which line number to say that this instruction occurs on. Use the relevantTokens as an approximation, but subclasses might be able to be more precise. Answer -1 if this instruction doesn't seem to have a location in the source associated with it.

relevantTokens

var relevantTokens: A_Tuple

The tuple of tokens that contributed to producing this instruction.