634 lines
25 KiB
C++
634 lines
25 KiB
C++
#include "lang/parser.hpp"
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#include <optional>
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#include <variant>
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#define MATCHES(x) (begin() && x)
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#define TO_NUMERIC_EXPRESSION(node) new ASTNodeNumericExpression((node), new ASTNodeIntegerLiteral({ Token::ValueType::Signed32Bit, s32(0) }), Token::Operator::Plus)
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// Definition syntax:
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// [A] : Either A or no token
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// [A|B] : Either A, B or no token
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// <A|B> : Either A or B
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// <A...> : One or more of A
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// A B C : Sequence of tokens A then B then C
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// (parseXXXX) : Parsing handled by other function
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namespace hex::lang {
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/* Mathematical expressions */
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// Identifier([(parseMathematicalExpression)|<(parseMathematicalExpression),...>(parseMathematicalExpression)]
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ASTNode* Parser::parseFunctionCall() {
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auto functionName = getValue<std::string>(-2);
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std::vector<ASTNode*> params;
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ScopeExit paramCleanup([&]{
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for (auto ¶m : params)
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delete param;
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});
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while (!MATCHES(sequence(SEPARATOR_ROUNDBRACKETCLOSE))) {
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if (MATCHES(sequence(STRING)))
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params.push_back(parseStringLiteral());
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else
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params.push_back(parseMathematicalExpression());
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if (MATCHES(sequence(SEPARATOR_COMMA, SEPARATOR_ROUNDBRACKETCLOSE)))
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throwParseError("unexpected ',' at end of function parameter list", -1);
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else if (MATCHES(sequence(SEPARATOR_ROUNDBRACKETCLOSE)))
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break;
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else if (!MATCHES(sequence(SEPARATOR_COMMA)))
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throwParseError("missing ',' between parameters", -1);
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}
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paramCleanup.release();
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return new ASTNodeFunctionCall(functionName, params);
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}
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ASTNode* Parser::parseStringLiteral() {
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return new ASTNodeStringLiteral(getValue<std::string>(-1));
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}
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// Identifier::<Identifier[::]...>
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ASTNode* Parser::parseScopeResolution(std::vector<std::string> &path) {
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if (peek(IDENTIFIER, -1))
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path.push_back(getValue<std::string>(-1));
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if (MATCHES(sequence(SEPARATOR_SCOPE_RESOLUTION))) {
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if (MATCHES(sequence(IDENTIFIER)))
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return this->parseScopeResolution(path);
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else
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throwParseError("expected member name", -1);
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} else
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return TO_NUMERIC_EXPRESSION(new ASTNodeScopeResolution(path));
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}
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// <Identifier[.]...>
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ASTNode* Parser::parseRValue(std::vector<std::string> &path) {
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if (peek(IDENTIFIER, -1))
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path.push_back(getValue<std::string>(-1));
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if (MATCHES(sequence(SEPARATOR_DOT))) {
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if (MATCHES(sequence(IDENTIFIER)))
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return this->parseRValue(path);
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else
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throwParseError("expected member name", -1);
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} else
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return TO_NUMERIC_EXPRESSION(new ASTNodeRValue(path));
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}
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// <Integer|((parseMathematicalExpression))>
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ASTNode* Parser::parseFactor() {
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if (MATCHES(sequence(INTEGER)))
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return TO_NUMERIC_EXPRESSION(new ASTNodeIntegerLiteral(getValue<Token::IntegerLiteral>(-1)));
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else if (MATCHES(sequence(SEPARATOR_ROUNDBRACKETOPEN))) {
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auto node = this->parseMathematicalExpression();
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if (!MATCHES(sequence(SEPARATOR_ROUNDBRACKETCLOSE)))
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throwParseError("expected closing parenthesis");
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return node;
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} else if (MATCHES(sequence(IDENTIFIER, SEPARATOR_SCOPE_RESOLUTION))) {
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std::vector<std::string> path;
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this->m_curr--;
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return this->parseScopeResolution(path);
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} else if (MATCHES(sequence(IDENTIFIER, SEPARATOR_ROUNDBRACKETOPEN))) {
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return TO_NUMERIC_EXPRESSION(this->parseFunctionCall());
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} else if (MATCHES(sequence(IDENTIFIER))) {
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std::vector<std::string> path;
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return this->parseRValue(path);
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} else
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throwParseError("expected integer or parenthesis");
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}
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// <+|-|!|~> (parseFactor)
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ASTNode* Parser::parseUnaryExpression() {
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if (MATCHES(sequence(OPERATOR_PLUS) || sequence(OPERATOR_MINUS) || sequence(OPERATOR_BOOLNOT) || sequence(OPERATOR_BITNOT))) {
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auto op = getValue<Token::Operator>(-1);
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return new ASTNodeNumericExpression(new ASTNodeIntegerLiteral({ Token::ValueType::Signed32Bit, 0}), this->parseFactor(), op);
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}
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return this->parseFactor();
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}
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// (parseUnaryExpression) <*|/> (parseUnaryExpression)
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ASTNode* Parser::parseMultiplicativeExpression() {
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auto node = this->parseUnaryExpression();
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while (MATCHES(variant(OPERATOR_STAR, OPERATOR_SLASH))) {
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auto op = getValue<Token::Operator>(-1);
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node = new ASTNodeNumericExpression(node, this->parseUnaryExpression(), op);
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}
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return node;
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}
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// (parseMultiplicativeExpression) <+|-> (parseMultiplicativeExpression)
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ASTNode* Parser::parseAdditiveExpression() {
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auto node = this->parseMultiplicativeExpression();
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while (MATCHES(variant(OPERATOR_PLUS, OPERATOR_MINUS))) {
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auto op = getValue<Token::Operator>(-1);
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node = new ASTNodeNumericExpression(node, this->parseMultiplicativeExpression(), op);
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}
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return node;
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}
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// (parseAdditiveExpression) < >>|<< > (parseAdditiveExpression)
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ASTNode* Parser::parseShiftExpression() {
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auto node = this->parseAdditiveExpression();
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while (MATCHES(variant(OPERATOR_SHIFTLEFT, OPERATOR_SHIFTRIGHT))) {
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auto op = getValue<Token::Operator>(-1);
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node = new ASTNodeNumericExpression(node, this->parseAdditiveExpression(), op);
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}
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return node;
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}
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// (parseAdditiveExpression) < >=|<=|>|< > (parseAdditiveExpression)
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ASTNode* Parser::parseRelationExpression() {
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auto node = this->parseShiftExpression();
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while (MATCHES(sequence(OPERATOR_BOOLGREATERTHAN) || sequence(OPERATOR_BOOLLESSTHAN) || sequence(OPERATOR_BOOLGREATERTHANOREQUALS) || sequence(OPERATOR_BOOLLESSTHANOREQUALS))) {
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auto op = getValue<Token::Operator>(-1);
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node = new ASTNodeNumericExpression(node, this->parseShiftExpression(), op);
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}
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return node;
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}
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// (parseRelationExpression) <==|!=> (parseRelationExpression)
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ASTNode* Parser::parseEqualityExpression() {
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auto node = this->parseRelationExpression();
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while (MATCHES(sequence(OPERATOR_BOOLEQUALS) || sequence(OPERATOR_BOOLNOTEQUALS))) {
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auto op = getValue<Token::Operator>(-1);
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node = new ASTNodeNumericExpression(node, this->parseRelationExpression(), op);
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}
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return node;
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}
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// (parseEqualityExpression) & (parseEqualityExpression)
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ASTNode* Parser::parseBinaryAndExpression() {
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auto node = this->parseEqualityExpression();
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while (MATCHES(sequence(OPERATOR_BITAND))) {
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node = new ASTNodeNumericExpression(node, this->parseEqualityExpression(), Token::Operator::BitAnd);
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}
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return node;
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}
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// (parseBinaryAndExpression) ^ (parseBinaryAndExpression)
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ASTNode* Parser::parseBinaryXorExpression() {
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auto node = this->parseBinaryAndExpression();
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while (MATCHES(sequence(OPERATOR_BITXOR))) {
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node = new ASTNodeNumericExpression(node, this->parseBinaryAndExpression(), Token::Operator::BitXor);
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}
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return node;
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}
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// (parseBinaryXorExpression) | (parseBinaryXorExpression)
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ASTNode* Parser::parseBinaryOrExpression() {
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auto node = this->parseBinaryXorExpression();
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while (MATCHES(sequence(OPERATOR_BITOR))) {
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node = new ASTNodeNumericExpression(node, this->parseBinaryXorExpression(), Token::Operator::BitOr);
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}
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return node;
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}
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// (parseBinaryOrExpression) && (parseBinaryOrExpression)
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ASTNode* Parser::parseBooleanAnd() {
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auto node = this->parseBinaryOrExpression();
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while (MATCHES(sequence(OPERATOR_BOOLAND))) {
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node = new ASTNodeNumericExpression(node, this->parseBinaryOrExpression(), Token::Operator::BitOr);
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}
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return node;
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}
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// (parseBooleanAnd) ^^ (parseBooleanAnd)
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ASTNode* Parser::parseBooleanXor() {
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auto node = this->parseBooleanAnd();
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while (MATCHES(sequence(OPERATOR_BOOLXOR))) {
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node = new ASTNodeNumericExpression(node, this->parseBooleanAnd(), Token::Operator::BitOr);
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}
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return node;
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}
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// (parseBooleanXor) || (parseBooleanXor)
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ASTNode* Parser::parseBooleanOr() {
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auto node = this->parseBooleanXor();
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while (MATCHES(sequence(OPERATOR_BOOLOR))) {
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node = new ASTNodeNumericExpression(node, this->parseBooleanXor(), Token::Operator::BitOr);
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}
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return node;
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}
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// (parseBooleanOr) ? (parseBooleanOr) : (parseBooleanOr)
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ASTNode* Parser::parseTernaryConditional() {
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auto node = this->parseBooleanXor();
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while (MATCHES(sequence(OPERATOR_TERNARYCONDITIONAL))) {
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auto second = this->parseBooleanXor();
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if (!MATCHES(sequence(OPERATOR_INHERIT)))
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throwParseError("expected ':' in ternary expression");
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auto third = this->parseBooleanXor();
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node = new ASTNodeTernaryExpression(node, second, third, Token::Operator::TernaryConditional);
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}
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return node;
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}
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// (parseTernaryConditional)
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ASTNode* Parser::parseMathematicalExpression() {
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return this->parseTernaryConditional();
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}
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/* Control flow */
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// if ((parseMathematicalExpression)) { (parseMember) }
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ASTNode* Parser::parseConditional() {
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auto condition = parseMathematicalExpression();
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std::vector<ASTNode*> trueBody, falseBody;
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ScopeExit cleanup([&]{
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delete condition;
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for (auto &statement : trueBody)
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delete statement;
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for (auto &statement : falseBody)
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delete statement;
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});
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if (MATCHES(sequence(SEPARATOR_ROUNDBRACKETCLOSE, SEPARATOR_CURLYBRACKETOPEN))) {
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while (!MATCHES(sequence(SEPARATOR_CURLYBRACKETCLOSE))) {
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trueBody.push_back(parseMember());
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}
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} else if (MATCHES(sequence(SEPARATOR_ROUNDBRACKETCLOSE))) {
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trueBody.push_back(parseMember());
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} else
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throwParseError("expected body of conditional statement");
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if (MATCHES(sequence(KEYWORD_ELSE, SEPARATOR_CURLYBRACKETOPEN))) {
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while (!MATCHES(sequence(SEPARATOR_CURLYBRACKETCLOSE))) {
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falseBody.push_back(parseMember());
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}
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} else if (MATCHES(sequence(KEYWORD_ELSE))) {
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falseBody.push_back(parseMember());
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}
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cleanup.release();
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return new ASTNodeConditionalStatement(condition, trueBody, falseBody);
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}
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/* Type declarations */
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// [be|le] <Identifier|u8|u16|u32|u64|u128|s8|s16|s32|s64|s128|float|double>
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ASTNode* Parser::parseType(s32 startIndex) {
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std::optional<std::endian> endian;
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if (peekOptional(KEYWORD_LE, 0))
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endian = std::endian::little;
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else if (peekOptional(KEYWORD_BE, 0))
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endian = std::endian::big;
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if (getType(startIndex) == Token::Type::Identifier) { // Custom type
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if (!this->m_types.contains(getValue<std::string>(startIndex)))
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throwParseError("failed to parse type");
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return new ASTNodeTypeDecl({ }, this->m_types[getValue<std::string>(startIndex)]->clone(), endian);
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}
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else { // Builtin type
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return new ASTNodeTypeDecl({ }, new ASTNodeBuiltinType(getValue<Token::ValueType>(startIndex)), endian);
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}
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}
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// using Identifier = (parseType)
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ASTNode* Parser::parseUsingDeclaration() {
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auto *type = dynamic_cast<ASTNodeTypeDecl *>(parseType(-1));
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if (type == nullptr) throwParseError("invalid type used in variable declaration", -1);
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if (peekOptional(KEYWORD_BE) || peekOptional(KEYWORD_LE))
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return new ASTNodeTypeDecl(getValue<std::string>(-4), type, type->getEndian());
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else
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return new ASTNodeTypeDecl(getValue<std::string>(-3), type, type->getEndian());
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}
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// padding[(parseMathematicalExpression)]
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ASTNode* Parser::parsePadding() {
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auto size = parseMathematicalExpression();
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if (!MATCHES(sequence(SEPARATOR_SQUAREBRACKETCLOSE))) {
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delete size;
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throwParseError("expected closing ']' at end of array declaration", -1);
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}
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return new ASTNodeArrayVariableDecl({ }, new ASTNodeTypeDecl({ }, new ASTNodeBuiltinType(Token::ValueType::Padding)), size);;
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}
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// (parseType) Identifier
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ASTNode* Parser::parseMemberVariable() {
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auto type = dynamic_cast<ASTNodeTypeDecl *>(parseType(-2));
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if (type == nullptr) throwParseError("invalid type used in variable declaration", -1);
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return new ASTNodeVariableDecl(getValue<std::string>(-1), type);
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}
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// (parseType) Identifier[(parseMathematicalExpression)]
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ASTNode* Parser::parseMemberArrayVariable() {
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auto type = dynamic_cast<ASTNodeTypeDecl *>(parseType(-3));
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if (type == nullptr) throwParseError("invalid type used in variable declaration", -1);
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auto name = getValue<std::string>(-2);
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ASTNode *size = nullptr;
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ScopeExit sizeCleanup([&]{ delete size; });
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if (!MATCHES(sequence(SEPARATOR_SQUAREBRACKETCLOSE))) {
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size = parseMathematicalExpression();
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if (!MATCHES(sequence(SEPARATOR_SQUAREBRACKETCLOSE)))
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throwParseError("expected closing ']' at end of array declaration", -1);
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}
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sizeCleanup.release();
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return new ASTNodeArrayVariableDecl(name, type, size);
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}
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// (parseType) *Identifier : (parseType)
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ASTNode* Parser::parseMemberPointerVariable() {
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auto name = getValue<std::string>(-2);
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auto pointerType = dynamic_cast<ASTNodeTypeDecl *>(parseType(-4));
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if (pointerType == nullptr) throwParseError("invalid type used in variable declaration", -1);
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if (!MATCHES((optional(KEYWORD_BE), optional(KEYWORD_LE)) && sequence(VALUETYPE_UNSIGNED)))
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throwParseError("expected unsigned builtin type as size", -1);
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auto sizeType = dynamic_cast<ASTNodeTypeDecl *>(parseType(-1));
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if (sizeType == nullptr) throwParseError("invalid type used for pointer size", -1);
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return new ASTNodePointerVariableDecl(name, pointerType, sizeType);
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}
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// [(parsePadding)|(parseMemberVariable)|(parseMemberArrayVariable)|(parseMemberPointerVariable)]
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ASTNode* Parser::parseMember() {
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ASTNode *member;
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if (MATCHES(sequence(VALUETYPE_PADDING, SEPARATOR_SQUAREBRACKETOPEN)))
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member = parsePadding();
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else if (MATCHES((optional(KEYWORD_BE), optional(KEYWORD_LE)) && variant(IDENTIFIER, VALUETYPE_ANY) && sequence(IDENTIFIER, SEPARATOR_SQUAREBRACKETOPEN)))
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member = parseMemberArrayVariable();
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else if (MATCHES((optional(KEYWORD_BE), optional(KEYWORD_LE)) && variant(IDENTIFIER, VALUETYPE_ANY) && sequence(IDENTIFIER)))
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member = parseMemberVariable();
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else if (MATCHES((optional(KEYWORD_BE), optional(KEYWORD_LE)) && variant(IDENTIFIER, VALUETYPE_ANY) && sequence(OPERATOR_STAR, IDENTIFIER, OPERATOR_INHERIT)))
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member = parseMemberPointerVariable();
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else if (MATCHES(sequence(KEYWORD_IF, SEPARATOR_ROUNDBRACKETOPEN)))
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return parseConditional();
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else if (MATCHES(sequence(SEPARATOR_ENDOFPROGRAM)))
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throwParseError("unexpected end of program", -2);
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else
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throwParseError("invalid struct member", 0);
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if (!MATCHES(sequence(SEPARATOR_ENDOFEXPRESSION)))
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throwParseError("missing ';' at end of expression", -1);
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return member;
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}
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// struct Identifier { <(parseMember)...> }
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ASTNode* Parser::parseStruct() {
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const auto structNode = new ASTNodeStruct();
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const auto &typeName = getValue<std::string>(-2);
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ScopeExit structGuard([&]{ delete structNode; });
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while (!MATCHES(sequence(SEPARATOR_CURLYBRACKETCLOSE))) {
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structNode->addMember(parseMember());
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}
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structGuard.release();
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return new ASTNodeTypeDecl(typeName, structNode);
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}
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// union Identifier { <(parseMember)...> }
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ASTNode* Parser::parseUnion() {
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const auto unionNode = new ASTNodeUnion();
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const auto &typeName = getValue<std::string>(-2);
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ScopeExit unionGuard([&]{ delete unionNode; });
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while (!MATCHES(sequence(SEPARATOR_CURLYBRACKETCLOSE))) {
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unionNode->addMember(parseMember());
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}
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unionGuard.release();
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return new ASTNodeTypeDecl(typeName, unionNode);
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}
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// enum Identifier : (parseType) { <<Identifier|Identifier = (parseMathematicalExpression)[,]>...> }
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ASTNode* Parser::parseEnum() {
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std::string typeName;
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if (peekOptional(KEYWORD_BE) || peekOptional(KEYWORD_LE))
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typeName = getValue<std::string>(-5);
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else
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typeName = getValue<std::string>(-4);
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auto underlyingType = dynamic_cast<ASTNodeTypeDecl*>(parseType(-2));
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if (underlyingType == nullptr) throwParseError("failed to parse type", -2);
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const auto enumNode = new ASTNodeEnum(underlyingType);
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ScopeExit enumGuard([&]{ delete enumNode; });
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ASTNode *lastEntry = nullptr;
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while (!MATCHES(sequence(SEPARATOR_CURLYBRACKETCLOSE))) {
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if (MATCHES(sequence(IDENTIFIER, OPERATOR_ASSIGNMENT))) {
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auto name = getValue<std::string>(-2);
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auto value = parseMathematicalExpression();
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enumNode->addEntry(name, value);
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lastEntry = value;
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}
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else if (MATCHES(sequence(IDENTIFIER))) {
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ASTNode *valueExpr;
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auto name = getValue<std::string>(-1);
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if (enumNode->getEntries().empty())
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lastEntry = TO_NUMERIC_EXPRESSION(new ASTNodeIntegerLiteral({ Token::ValueType::Unsigned8Bit, u8(0) }));
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else
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valueExpr = new ASTNodeNumericExpression(lastEntry->clone(), new ASTNodeIntegerLiteral({ Token::ValueType::Signed32Bit, s32(1) }), Token::Operator::Plus);
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enumNode->addEntry(name, valueExpr);
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}
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else if (MATCHES(sequence(SEPARATOR_ENDOFPROGRAM)))
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throwParseError("unexpected end of program", -2);
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else
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throwParseError("invalid union member", 0);
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if (!MATCHES(sequence(SEPARATOR_COMMA))) {
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if (MATCHES(sequence(SEPARATOR_CURLYBRACKETCLOSE)))
|
|
break;
|
|
else
|
|
throwParseError("missing ',' between enum entries", 0);
|
|
}
|
|
}
|
|
|
|
enumGuard.release();
|
|
|
|
return new ASTNodeTypeDecl(typeName, enumNode);
|
|
}
|
|
|
|
// bitfield Identifier { <Identifier : (parseMathematicalExpression)[;]...> }
|
|
ASTNode* Parser::parseBitfield() {
|
|
std::string typeName = getValue<std::string>(-2);
|
|
|
|
const auto bitfieldNode = new ASTNodeBitfield();
|
|
ScopeExit enumGuard([&]{ delete bitfieldNode; });
|
|
|
|
while (!MATCHES(sequence(SEPARATOR_CURLYBRACKETCLOSE))) {
|
|
if (MATCHES(sequence(IDENTIFIER, OPERATOR_INHERIT))) {
|
|
auto name = getValue<std::string>(-2);
|
|
bitfieldNode->addEntry(name, parseMathematicalExpression());
|
|
}
|
|
else if (MATCHES(sequence(SEPARATOR_ENDOFPROGRAM)))
|
|
throwParseError("unexpected end of program", -2);
|
|
else
|
|
throwParseError("invalid bitfield member", 0);
|
|
|
|
if (!MATCHES(sequence(SEPARATOR_ENDOFEXPRESSION))) {
|
|
throwParseError("missing ';' at end of expression", -1);
|
|
}
|
|
}
|
|
|
|
enumGuard.release();
|
|
|
|
return new ASTNodeTypeDecl(typeName, bitfieldNode);
|
|
}
|
|
|
|
// (parseType) Identifier @ Integer
|
|
ASTNode* Parser::parseVariablePlacement() {
|
|
auto type = dynamic_cast<ASTNodeTypeDecl *>(parseType(-3));
|
|
if (type == nullptr) throwParseError("invalid type used in variable declaration", -1);
|
|
|
|
return new ASTNodeVariableDecl(getValue<std::string>(-2), type, parseMathematicalExpression());
|
|
}
|
|
|
|
// (parseType) Identifier[[(parseMathematicalExpression)]] @ Integer
|
|
ASTNode* Parser::parseArrayVariablePlacement() {
|
|
auto type = dynamic_cast<ASTNodeTypeDecl *>(parseType(-3));
|
|
if (type == nullptr) throwParseError("invalid type used in variable declaration", -1);
|
|
|
|
auto name = getValue<std::string>(-2);
|
|
|
|
ASTNode *size = nullptr;
|
|
ScopeExit sizeCleanup([&]{ delete size; });
|
|
|
|
if (!MATCHES(sequence(SEPARATOR_SQUAREBRACKETCLOSE))) {
|
|
size = parseMathematicalExpression();
|
|
|
|
if (!MATCHES(sequence(SEPARATOR_SQUAREBRACKETCLOSE)))
|
|
throwParseError("expected closing ']' at end of array declaration", -1);
|
|
}
|
|
|
|
if (!MATCHES(sequence(OPERATOR_AT)))
|
|
throwParseError("expected placement instruction", -1);
|
|
|
|
sizeCleanup.release();
|
|
|
|
return new ASTNodeArrayVariableDecl(name, type, size, parseMathematicalExpression());
|
|
}
|
|
|
|
// (parseType) *Identifier : (parseType) @ Integer
|
|
ASTNode* Parser::parsePointerVariablePlacement() {
|
|
auto name = getValue<std::string>(-2);
|
|
|
|
auto temporaryPointerType = dynamic_cast<ASTNodeTypeDecl *>(parseType(-4));
|
|
if (temporaryPointerType == nullptr) throwParseError("invalid type used in variable declaration", -1);
|
|
|
|
if (!MATCHES((optional(KEYWORD_BE), optional(KEYWORD_LE)) && sequence(VALUETYPE_UNSIGNED)))
|
|
throwParseError("expected unsigned builtin type as size", -1);
|
|
|
|
auto temporaryPointerSizeType = dynamic_cast<ASTNodeTypeDecl *>(parseType(-1));
|
|
if (temporaryPointerSizeType == nullptr) throwParseError("invalid size type used in pointer declaration", -1);
|
|
|
|
if (!MATCHES(sequence(OPERATOR_AT)))
|
|
throwParseError("expected placement instruction", -1);
|
|
|
|
return new ASTNodePointerVariableDecl(name, temporaryPointerType, temporaryPointerSizeType, parseMathematicalExpression());
|
|
}
|
|
|
|
|
|
|
|
/* Program */
|
|
|
|
// <(parseUsingDeclaration)|(parseVariablePlacement)|(parseStruct)>
|
|
ASTNode* Parser::parseStatement() {
|
|
ASTNode *statement;
|
|
|
|
if (MATCHES(sequence(KEYWORD_USING, IDENTIFIER, OPERATOR_ASSIGNMENT) && (optional(KEYWORD_BE), optional(KEYWORD_LE)) && variant(IDENTIFIER, VALUETYPE_ANY)))
|
|
statement = dynamic_cast<ASTNodeTypeDecl*>(parseUsingDeclaration());
|
|
else if (MATCHES((optional(KEYWORD_BE), optional(KEYWORD_LE)) && variant(IDENTIFIER, VALUETYPE_ANY) && sequence(IDENTIFIER, SEPARATOR_SQUAREBRACKETOPEN)))
|
|
statement = parseArrayVariablePlacement();
|
|
else if (MATCHES((optional(KEYWORD_BE), optional(KEYWORD_LE)) && variant(IDENTIFIER, VALUETYPE_ANY) && sequence(IDENTIFIER, OPERATOR_AT)))
|
|
statement = parseVariablePlacement();
|
|
else if (MATCHES((optional(KEYWORD_BE), optional(KEYWORD_LE)) && variant(IDENTIFIER, VALUETYPE_ANY) && sequence(OPERATOR_STAR, IDENTIFIER, OPERATOR_INHERIT)))
|
|
statement = parsePointerVariablePlacement();
|
|
else if (MATCHES(sequence(KEYWORD_STRUCT, IDENTIFIER, SEPARATOR_CURLYBRACKETOPEN)))
|
|
statement = parseStruct();
|
|
else if (MATCHES(sequence(KEYWORD_UNION, IDENTIFIER, SEPARATOR_CURLYBRACKETOPEN)))
|
|
statement = parseUnion();
|
|
else if (MATCHES(sequence(KEYWORD_ENUM, IDENTIFIER, OPERATOR_INHERIT) && (optional(KEYWORD_BE), optional(KEYWORD_LE)) && sequence(VALUETYPE_UNSIGNED, SEPARATOR_CURLYBRACKETOPEN)))
|
|
statement = parseEnum();
|
|
else if (MATCHES(sequence(KEYWORD_BITFIELD, IDENTIFIER, SEPARATOR_CURLYBRACKETOPEN)))
|
|
statement = parseBitfield();
|
|
else if (MATCHES(sequence(IDENTIFIER, SEPARATOR_ROUNDBRACKETOPEN)))
|
|
statement = parseFunctionCall();
|
|
else throwParseError("invalid sequence", 0);
|
|
|
|
if (!MATCHES(sequence(SEPARATOR_ENDOFEXPRESSION)))
|
|
throwParseError("missing ';' at end of expression", -1);
|
|
|
|
if (auto typeDecl = dynamic_cast<ASTNodeTypeDecl*>(statement); typeDecl != nullptr)
|
|
this->m_types.insert({ typeDecl->getName().data(), typeDecl });
|
|
|
|
return statement;
|
|
}
|
|
|
|
// <(parseStatement)...> EndOfProgram
|
|
std::optional<std::vector<ASTNode*>> Parser::parse(const std::vector<Token> &tokens) {
|
|
this->m_curr = tokens.begin();
|
|
|
|
this->m_types.clear();
|
|
|
|
try {
|
|
auto program = parseTillToken(SEPARATOR_ENDOFPROGRAM);
|
|
|
|
if (program.empty() || this->m_curr != tokens.end())
|
|
throwParseError("program is empty!", -1);
|
|
|
|
return program;
|
|
} catch (ParseError &e) {
|
|
this->m_error = e;
|
|
}
|
|
|
|
return { };
|
|
}
|
|
|
|
} |