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Support for digraphs such as &&, <<, ++

This commit is contained in:
Sasha Koshka 2022-08-11 02:54:20 -05:00
parent 758b85e735
commit 0a31ea7bf8
1 changed files with 35 additions and 5 deletions
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40
lexer/lexer.go
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@ -159,7 +159,13 @@ func (lexer *LexingOperation) tokenizeSymbolBeginning () (err error) {
})
err = lexer.nextRune()
case '+':
// TODO: tokenize plus begin
err = lexer.nextRune()
if err != nil { return }
token := Token { kind: TokenKindPlus }
if lexer.char == '+' {
token.kind = TokenKindIncrement
}
lexer.addToken(token)
err = lexer.nextRune()
case '-':
err = lexer.tokenizeDashBeginning()
@ -194,16 +200,40 @@ func (lexer *LexingOperation) tokenizeSymbolBeginning () (err error) {
})
err = lexer.nextRune()
case '<':
// TODO: tokenize less than begin
err = lexer.nextRune()
if err != nil { return }
token := Token { kind: TokenKindLessThan }
if lexer.char == '<' {
token.kind = TokenKindLShift
}
lexer.addToken(token)
err = lexer.nextRune()
case '>':
// TODO: tokenize greater than begin
err = lexer.nextRune()
if err != nil { return }
token := Token { kind: TokenKindGreaterThan }
if lexer.char == '>' {
token.kind = TokenKindRShift
}
lexer.addToken(token)
err = lexer.nextRune()
case '|':
// TODO: tokenize bar begin
err = lexer.nextRune()
if err != nil { return }
token := Token { kind: TokenKindBinaryOr }
if lexer.char == '|' {
token.kind = TokenKindLogicalOr
}
lexer.addToken(token)
err = lexer.nextRune()
case '&':
// TODO: tokenize and begin
err = lexer.nextRune()
if err != nil { return }
token := Token { kind: TokenKindBinaryAnd }
if lexer.char == '&' {
token.kind = TokenKindLogicalAnd
}
lexer.addToken(token)
err = lexer.nextRune()
default:
err = file.NewError (