116 lines
2 KiB
C++
116 lines
2 KiB
C++
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#pragma once
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#include <unordered_map>
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#include <optional>
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#include "bolt/CST.hpp"
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namespace bolt {
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class Scanner;
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enum OperatorFlags {
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OperatorFlags_Prefix = 1,
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OperatorFlags_Suffix = 2,
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OperatorFlags_InfixL = 4,
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OperatorFlags_InfixR = 8,
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};
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struct OperatorInfo {
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int Precedence;
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unsigned Flags;
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inline bool isPrefix() const noexcept {
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return Flags & OperatorFlags_Prefix;
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}
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inline bool isSuffix() const noexcept {
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return Flags & OperatorFlags_Suffix;
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}
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inline bool isInfix() const noexcept {
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return Flags & (OperatorFlags_InfixL | OperatorFlags_InfixR);
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}
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inline bool isRightAssoc() const noexcept {
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return Flags & OperatorFlags_InfixR;
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}
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};
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class OperatorTable {
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std::unordered_map<std::string, OperatorInfo> Mapping;
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public:
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void add(std::string Name, unsigned Flags, int Precedence);
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std::optional<OperatorInfo> getInfix(Token* T);
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bool isInfix(Token* T);
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bool isPrefix(Token* T);
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bool isSuffix(Token* T);
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};
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class Parser {
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TextFile& File;
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Stream<Token*>& Tokens;
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OperatorTable ExprOperators;
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Token* peekFirstTokenAfterModifiers();
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Token* expectToken(NodeType Ty);
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Expression* parseInfixOperatorAfterExpression(Expression* LHS, int MinPrecedence);
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TypeExpression* parsePrimitiveTypeExpression();
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Expression* parsePrimitiveExpression();
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public:
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Parser(TextFile& File, Stream<Token*>& S);
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QualifiedName* parseQualifiedName();
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TypeExpression* parseTypeExpression();
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Pattern* parsePattern();
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Param* parseParam();
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ReferenceExpression* parseReferenceExpression();
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Expression* parseUnaryExpression();
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Expression* parseExpression();
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Expression* parseCallExpression();
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IfStatement* parseIfStatement();
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ReturnStatement* parseReturnStatement();
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ExpressionStatement* parseExpressionStatement();
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Node* parseLetBodyElement();
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LetDeclaration* parseLetDeclaration();
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Node* parseSourceElement();
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SourceFile* parseSourceFile();
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};
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}
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