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75 lines
1.8 KiB
Racket
75 lines
1.8 KiB
Racket
#lang racket/base
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(require yaragg/rules/lexer
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rackunit
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yaragg-parser-tools/lex)
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(define (l s)
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(define t (lex/1 (open-input-string s)))
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(list (token-name (position-token-token t))
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(token-value (position-token-token t))
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(position-offset (position-token-start-pos t))
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(position-offset (position-token-end-pos t))))
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;; WARNING: the offsets are not in terms of file positions. So they
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;; start counting at 1, not 0.
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(check-equal? (l " hi")
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'(ID "hi" 2 4))
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(check-equal? (l " hi")
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'(ID "hi" 3 5))
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(check-equal? (l "hi")
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'(ID "hi" 1 3))
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(check-equal? (l "# foobar\nhi")
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'(ID "hi" 10 12))
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(check-equal? (l "# foobar\rhi")
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'(ID "hi" 10 12))
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(check-equal? (l "# foobar\r\nhi")
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'(ID "hi" 11 13))
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(check-equal? (l "hi:")
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'(RULE_HEAD "hi:" 1 4))
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(check-equal? (l "hi :")
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'(RULE_HEAD "hi :" 1 7))
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(check-equal? (l "|")
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'(PIPE "|" 1 2))
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(check-equal? (l "(")
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'(LPAREN "(" 1 2))
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(check-equal? (l "[")
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'(LBRACKET "[" 1 2))
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(check-equal? (l ")")
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'(RPAREN ")" 1 2))
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(check-equal? (l "]")
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'(RBRACKET "]" 1 2))
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;; 220111: lexer now converts single-quoted lexemes
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;; to standard Racket-style double-quoted string literal
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(check-equal? (l "'hello'")
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'(LIT "\"hello\"" 1 8))
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(check-equal? (l "'he\\'llo'")
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'(LIT "\"he'llo\"" 1 10))
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(check-equal? (l "/")
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'(HIDE "/" 1 2))
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(check-equal? (l " /")
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'(HIDE "/" 2 3))
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(check-equal? (l "@")
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'(SPLICE "@" 1 2))
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(check-equal? (l " @")
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'(SPLICE "@" 2 3))
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(check-equal? (l "#:prefix-out val:")
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(list 'EOF eof 18 18)) ; lexer skips kwarg |