package parser import "git.tebibyte.media/arf/arf/types" import "git.tebibyte.media/arf/arf/lexer" import "git.tebibyte.media/arf/arf/infoerr" // parseObjtSection parses an object type definition. This allows for structured // types to be defined, and for member variables to be added and overridden. func (parser *ParsingOperation) parseObjtSection () ( section *ObjtSection, err error, ) { err = parser.expect(lexer.TokenKindName) if err != nil { return } section = &ObjtSection { location: parser.token.Location() } // get permission err = parser.nextToken(lexer.TokenKindPermission) if err != nil { return } section.permission = parser.token.Value().(types.Permission) // get name err = parser.nextToken(lexer.TokenKindName) if err != nil { return } section.name = parser.token.Value().(string) // parse inherited type err = parser.nextToken(lexer.TokenKindColon) if err != nil { return } err = parser.nextToken() if err != nil { return } section.inherits, err = parser.parseIdentifier() if err != nil { return } err = parser.expect(lexer.TokenKindNewline) if err != nil { return } err = parser.nextToken() if err != nil { return } // parse members err = parser.parseObjtMembers(section) if err != nil { return } if len(section.members) == 0 { infoerr.NewError ( section.location, "defining an object with no members", infoerr.ErrorKindWarn).Print() } return } // parseObjtMembers parses a list of members for an object section. Indentation // level is assumed. func (parser *ParsingOperation) parseObjtMembers ( into *ObjtSection, ) ( err error, ) { for { // if we've left the block, stop parsing if !parser.token.Is(lexer.TokenKindIndent) { return } if parser.token.Value().(int) != 1 { return } // add member to object section var member ObjtMember member, err = parser.parseObjtMember() into.members = append(into.members, member) if err != nil { return } } } // parseObjtMember parses a single member of an object section. Indentation // level is assumed. func (parser *ParsingOperation) parseObjtMember () ( member ObjtMember, err error, ) { // get permission err = parser.nextToken(lexer.TokenKindPermission) if err != nil { return } member.permission = parser.token.Value().(types.Permission) // get name err = parser.nextToken(lexer.TokenKindName) if err != nil { return } member.name = parser.token.Value().(string) // get type err = parser.nextToken(lexer.TokenKindColon) if err != nil { return } err = parser.nextToken() if err != nil { return } member.what, err = parser.parseType() if err != nil { return } // if there is a bit width, get it if parser.token.Is(lexer.TokenKindBinaryAnd) { err = parser.nextToken(lexer.TokenKindUInt) if err != nil { return } member.bitWidth = parser.token.Value().(uint64) err = parser.nextToken() if err != nil { return } } // parse default value if parser.token.Is(lexer.TokenKindNewline) { err = parser.nextToken() if err != nil { return } member.defaultValue, err = parser.parseInitializationValues(1) if err != nil { return } } else { member.defaultValue, err = parser.parseArgument() if err != nil { return } err = parser.expect(lexer.TokenKindNewline) if err != nil { return } err = parser.nextToken() if err != nil { return } } return }