Method visitConditional_waveforms

src/vhdlConvertor/exprParser.cpp:427–454

}

unique_ptr<iHdlExprItem> VhdlExprParser::visitConditional_waveforms(
		vhdlParser::Conditional_waveformsContext *ctx) {
	// conditional_waveforms:
	//       waveform WHEN condition
	//       ( ELSE waveform WHEN condition )*
	//       ( ELSE waveform )?
	// ;
	auto waveforms = ctx->waveform();
	auto conditions = ctx->condition();
	auto c = conditions.rbegin();
	unique_ptr<iHdlExprItem> res = nullptr;
	for (auto w = waveforms.rbegin(); w != waveforms.rend(); ++w) {
		auto w_expr = visitWaveform(*w);
		if (res == nullptr) {
			// the first iteration
			bool has_default_else = waveforms.size() > conditions.size();
			if (has_default_else) {
				// this waveform is a default else
				res = move(w_expr);
				continue;
			}
		}
		auto c_expr = visitCondition(*c);
		res = HdlOp::ternary(*w, move(c_expr), move(w_expr), move(res));
		c++;
	}
	return res;
}

unique_ptr<iHdlExprItem> VhdlExprParser::visitWaveform_element(
		vhdlParser::Waveform_elementContext *ctx) {