package parser import "os" import "path/filepath" import "github.com/sashakoshka/arf/file" import "github.com/sashakoshka/arf/lexer" // ParsingOperation holds information about an ongoing parsing operation. type ParsingOperation struct { modulePath string token lexer.Token tokens []lexer.Token tokenIndex int } // Parse reads the files located in the module specified by modulePath, and // converts them into an abstract syntax tree. func Parse (modulePath string) (tree *SyntaxTree, err error) { parser := ParsingOperation { modulePath: modulePath } tree, err = parser.parse() return } // parse runs the parsing operation. func (parser *ParsingOperation) parse () (tree *SyntaxTree, err error) { if parser.modulePath[len(parser.modulePath) - 1] != '/' { parser.modulePath += "/" } var moduleFiles []os.DirEntry moduleFiles, err = os.ReadDir(parser.modulePath) if err != nil { return } for _, entry := range moduleFiles { if filepath.Ext(entry.Name()) != ".arf" || entry.IsDir() { continue } var sourceFile *file.File sourceFile, err = file.Open(parser.modulePath + entry.Name()) if err != nil { return } var tokens []lexer.Token tokens, err = lexer.Tokenize(sourceFile) if err != nil { return } parser.tokens = append(parser.tokens, tokens...) } return }