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allow bit shifting to be as large as the target variable's datatype
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@ -91,6 +91,32 @@ internal class StatementReorderer(val program: Program, val errors: ErrorReporte
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}
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}
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override fun after(expr: BinaryExpression, parent: Node): Iterable<IAstModification> {
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// when using a simple bit shift and assigning it to a variable of a different type,
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// try to make the bit shifting 'wide enough' to fall into the variable's type.
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// with this, for instance, uword x = 1 << 10 will result in 1024 rather than 0 (the ubyte result).
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if(expr.operator=="<<" || expr.operator==">>") {
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val leftDt = expr.left.inferType(program)
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when (parent) {
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is Assignment -> {
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val targetDt = parent.target.inferType(program)
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if(leftDt != targetDt) {
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val cast = TypecastExpression(expr.left, targetDt.typeOrElse(DataType.STRUCT), true, parent.position)
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return listOf(IAstModification.ReplaceNode(expr.left, cast, expr))
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}
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}
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is VarDecl -> {
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if(!leftDt.istype(parent.datatype)) {
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val cast = TypecastExpression(expr.left, parent.datatype, true, parent.position)
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return listOf(IAstModification.ReplaceNode(expr.left, cast, expr))
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}
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}
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else -> return noModifications
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}
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}
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return noModifications
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}
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private fun getAutoIndexerVarFor(expr: ArrayIndexedExpression): MutableList<IAstModification> {
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val modifications = mutableListOf<IAstModification>()
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val subroutine = expr.definingSubroutine()!!
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