package parser import "git.tebibyte.media/arf/arf/types" import "git.tebibyte.media/arf/arf/lexer" // parseTypeSection parses a type definition. It can inherit from other types, // and define new members on them. func (parser *ParsingOperation) parseTypeSection () ( section TypeSection, err error, ) { err = parser.expect(lexer.TokenKindName) if err != nil { return } section.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.what, err = parser.parseType() if err != nil { return } // see if value exists if parser.token.Is(lexer.TokenKindNewline) { parser.nextToken() // if we have exited the section, return if !parser.token.Is(lexer.TokenKindIndent) { return } if parser.token.Value().(int) != 1 { return } err = parser.nextToken() if err != nil { return } } // if we have not encountered members, get value and return. if !parser.token.Is(lexer.TokenKindPermission) { section.argument, err = parser.parseArgument() err = parser.expect(lexer.TokenKindNewline) if err != nil { return } err = parser.nextToken() if err != nil { return } return } parser.previousToken() for { // if we have exited the section, return if !parser.token.Is(lexer.TokenKindIndent) { return } if parser.token.Value().(int) != 1 { return } err = parser.nextToken(lexer.TokenKindPermission) if err != nil { return } var member TypeSectionMember member, err = parser.parseTypeSectionMember() section.members = append(section.members, member) if err != nil { return } } return } // parseTypeSectionMember parses a type section member variable. func (parser *ParsingOperation) parseTypeSectionMember () ( member TypeSectionMember, err error, ) { // get permission err = parser.expect(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) // if there is a type, get it err = parser.nextToken() if err != nil { return } if parser.token.Is(lexer.TokenKindColon) { err = parser.nextToken(lexer.TokenKindName) if err != nil { return } member.what, err = parser.parseType() if err != nil { return } } // see if value exists if parser.token.Is(lexer.TokenKindNewline) { parser.nextToken() // if we have exited the member, return if !parser.token.Is(lexer.TokenKindIndent) { return } if parser.token.Value().(int) != 2 { return } err = parser.nextToken() if err != nil { return } } // if default value exists, get it if !parser.token.Is(lexer.TokenKindBinaryAnd) { member.argument, err = parser.parseArgument() } // if there is a bit width specifier, 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 } } err = parser.expect(lexer.TokenKindNewline) if err != nil { return } err = parser.nextToken() if err != nil { return } return }