From 45bc798d199fe1d115156cda5cff212610ed5517 Mon Sep 17 00:00:00 2001 From: Sasha Koshka Date: Tue, 16 Aug 2022 15:53:32 -0400 Subject: [PATCH] Added identifier and declaration parsing --- parser/argument.go | 76 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 parser/argument.go diff --git a/parser/argument.go b/parser/argument.go new file mode 100644 index 0000000..6a94bee --- /dev/null +++ b/parser/argument.go @@ -0,0 +1,76 @@ +package parser + +import "git.tebibyte.media/sashakoshka/arf/file" +import "git.tebibyte.media/sashakoshka/arf/lexer" + +var validArgumentStartTokens = []lexer.TokenKind { + lexer.TokenKindName, + + lexer.TokenKindInt, + lexer.TokenKindUInt, + lexer.TokenKindFloat, + lexer.TokenKindString, + lexer.TokenKindRune, + + lexer.TokenKindLBrace, + lexer.TokenKindLBracket, +} + +func (parser *ParsingOperation) parseArgument () (argument Argument, err error) { + argument.location = parser.token.Location() + + err = parser.expect(validArgumentStartTokens...) + if err != nil { return } + + switch parser.token.Kind() { + case lexer.TokenKindName: + var identifier Identifier + identifier, err = parser.parseIdentifier() + if err != nil { return } + + if parser.token.Is(lexer.TokenKindColon) { + var what Type + what, err = parser.parseType() + if err != nil { return } + + if len(identifier.trail) != 1 { + err = parser.token.NewError ( + "cannot use member selection in " + + "a variable definition", + file.ErrorKindError) + return + } + + argument.kind = ArgumentKindDeclaration + argument.value = Declaration { + location: argument.location, + name: identifier.trail[0], + what: what, + } + } else { + argument.kind = ArgumentKindIdentifier + argument.value = identifier + } + + case lexer.TokenKindInt: + + case lexer.TokenKindUInt: + + case lexer.TokenKindFloat: + + case lexer.TokenKindString: + + case lexer.TokenKindRune: + + case lexer.TokenKindLBrace: + + case lexer.TokenKindLBracket: + + default: + panic ( + "unimplemented argument kind " + + parser.token.Kind().Describe()) + } + + return +}