110 lines
3.2 KiB
C++
110 lines
3.2 KiB
C++
#ifndef COMDEL_PARSER_H
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#define COMDEL_PARSER_H
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#include "sourceerror.h"
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#include "presult.h"
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#include "token.h"
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#include "astnode.h"
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#include <optional>
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#include <set>
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#include <vector>
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/// Records the current span and can later be called on
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/// an ast node to apply the entire span to that node
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///
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/// Spanner's call operator MOVES from the node so it should
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/// be always used last.
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class Spanner {
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// REFERENCE to the parser's prevSpan. After parsing a node this will
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// "point" to the span of the last token contained in the node.
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const Span& prevSpan;
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public:
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const Span lo; // the low end of the span, beginning of the node
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Spanner(Span lo, Span& prevSpan) : lo(lo), prevSpan(prevSpan) {}
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template <typename T, typename = std::enable_if<std::is_base_of<AstNode, T>::value>>
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typename std::remove_reference_t<T> operator()(T&& astNode) const {
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astNode.span = lo.to(prevSpan);
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return std::move(astNode);
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}
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};
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class ComdelParser
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{
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private:
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std::vector<Token> tokens;
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std::set<TokenType> expectedTokens;
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unsigned int position;
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std::vector<SourceError> errors;
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Span &getPreviousSpan();
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void bump();
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bool consume(TokenType tokenType);
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bool check(TokenType tokenType);
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void skipUntilNextKeyword();
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Token ¤t();
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[[nodiscard]] PError unexpected();
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template<typename T>
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PResult<std::vector<T>> parseList(std::optional<TokenType> openDelim,
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TokenType closeDelim,
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std::optional<TokenType> separator,
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bool allowTrailing,
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const std::function<PResult<T> ()> &parse_f);
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Spanner getSpanner();
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PResult<StringNode> parseString();
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PResult<IdentifierNode> parseIdentifier();
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PResult<NumberNode> parseNumber();
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PResult<CountNode> parseCount();
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PResult<PropertyNode> parseProperty(std::optional<TokenType> valueType);
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PResult<EnumerationNode> parseEnumeration();
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PResult<ValueNode> parseConnectionWire();
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PResult<ComponentNode> parseComponent();
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PResult<AddressSpaceNode> parseAddress();
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PResult<PinNode> parsePin();
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PResult<DisplayNode> parseDisplay();
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PResult<PinConnectionNode> parsePinConnection();
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PResult<AttributeNode> parseAttribute();
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PResult<PopupNode> parsePopup();
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PResult<RuleNode> parseRule();
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PResult<BusNode> parseBus();
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PResult<WireNode> parseWire();
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PResult<ConnectionNode> parseConnection();
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PResult<DisplayItemNode> parseDisplayItem();
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PResult<IfStatementNode> parseIfStatement();
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PResult<ValueNode> parseValue();
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PResult<CountNode> parsePosition();
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PResult<InstanceNode> parseInstance();
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PResult<InstanceAttributeNode> parseInstanceAttribute();
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PResult<ConnectionInstanceNode> parseConnectionInstance();
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public:
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ComdelParser(std::vector<Token> tokens);
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std::optional<SchemaNode> parseSchema();
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std::optional<LibraryNode> parse();
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const std::vector<SourceError>& getErrors();
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PResult<EnumNode<ComponentNode::ComponentType>> parseComponentType();
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PResult<EnumNode<BusNode::BusType>> parseBusType();
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PResult<EnumNode<PinConnectionNode::ConnectionType>> parseConnectionType();
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};
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#endif // COMDEL_PARSER_H
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