public boolean contextMod(VectorSTL<ContextChange> vec, ContextSymbol sym,
			PatternExpression pe) {
		entry("contextMod", vec, sym, pe);
		VectorSTL<PatternValue> vallist = new VectorSTL<>();
		pe.listValues(vallist);
		for (int i = 0; i < vallist.size(); ++i) {
			PatternValue v = vallist.get(i);
			if (v instanceof EndInstructionValue || v instanceof Next2InstructionValue) {
				return false;
			}
		}

		ContextField field = (ContextField) sym.getPatternValue();
		ContextOp op = new ContextOp(sym.getLocation(), field.getStartBit(), field.getEndBit(), pe);
		vec.push_back(op);
		return true;
	}
Sets whether or not to print out warning info about
{@link Constructor}s which reference varnodes in the
unique space larger than {@link SleighBase#MAX_UNIQUE_SIZE}.
@param val whether to print info about contructors using large varnodes
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/pcodeCPort/slgh_compile/SleighCompile.java