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;;; test-lr-script-expression.scm --
;;
;;Parse scripts, each line an expression.
;;
(load "common-test.scm")
(define (doit . tokens)
(let ((parser (lalr-parser (expect: 0)
(driver: glr)
(N O C T (left: A) (left: M) (nonassoc: U))
(script (lines) : (reverse $1))
(lines (lines line) : (cons $2 $1)
(line) : (list $1))
(line (T) : #\newline
(E T) : $1
(error T) : (list 'error-clause $2))
(E (N) : $1
(E A E) : ($2 $1 $3)
(E M E) : ($2 $1 $3)
(A E (prec: U)) : ($1 $2)
(O E C) : $2))))
(parser (make-lexer tokens) error-handler)))
;;; --------------------------------------------------------------------
;;; Correct input
(check
(doit (make-lexical-token 'T #f #\newline))
=> '((#\newline)))
(check
(doit (make-lexical-token 'N #f 1)
(make-lexical-token 'T #f #\newline))
=> '((1)))
(check
(doit (make-lexical-token 'N #f 1)
(make-lexical-token 'A #f +)
(make-lexical-token 'N #f 2)
(make-lexical-token 'T #f #\newline))
=> '((3)))
(check
(doit (make-lexical-token 'N #f 1)
(make-lexical-token 'A #f +)
(make-lexical-token 'N #f 2)
(make-lexical-token 'M #f *)
(make-lexical-token 'N #f 3)
(make-lexical-token 'T #f #\newline))
=> '((9) (7)))
(check
(doit (make-lexical-token 'N #f 10)
(make-lexical-token 'M #f *)
(make-lexical-token 'N #f 2)
(make-lexical-token 'A #f +)
(make-lexical-token 'N #f 3)
(make-lexical-token 'T #f #\newline))
=> '((23)))
(check
(doit (make-lexical-token 'O #f #\()
(make-lexical-token 'N #f 1)
(make-lexical-token 'A #f +)
(make-lexical-token 'N #f 2)
(make-lexical-token 'C #f #\))
(make-lexical-token 'M #f *)
(make-lexical-token 'N #f 3)
(make-lexical-token 'T #f #\newline))
=> '((9)))
(check
(doit (make-lexical-token 'O #f #\()
(make-lexical-token 'N #f 1)
(make-lexical-token 'A #f +)
(make-lexical-token 'N #f 2)
(make-lexical-token 'C #f #\))
(make-lexical-token 'M #f *)
(make-lexical-token 'N #f 3)
(make-lexical-token 'T #f #\newline)
(make-lexical-token 'N #f 4)
(make-lexical-token 'M #f /)
(make-lexical-token 'N #f 5)
(make-lexical-token 'T #f #\newline))
=> '((9 4/5)))
;;; --------------------------------------------------------------------
(check
;;Successful error recovery.
(doit (make-lexical-token 'O #f #\()
(make-lexical-token 'N #f 1)
(make-lexical-token 'A #f +)
(make-lexical-token 'N #f 2)
(make-lexical-token 'M #f *)
(make-lexical-token 'N #f 3)
(make-lexical-token 'T #f #\newline)
(make-lexical-token 'N #f 4)
(make-lexical-token 'M #f /)
(make-lexical-token 'N #f 5)
(make-lexical-token 'T #f #\newline))
=> '())
(check
;;Unexpected end of input.
(doit (make-lexical-token 'N #f 1)
(make-lexical-token 'A #f +)
(make-lexical-token 'N #f 2))
=> '())
(check
;;Unexpected end of input.
(doit (make-lexical-token 'N #f 1)
(make-lexical-token 'A #f +)
(make-lexical-token 'T #f #\newline))
=> '())
;;; end of file
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