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184 lines
9.7 KiB
Racket
184 lines
9.7 KiB
Racket
#lang racket/base
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(require rackunit
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br-parser-tools/lex
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brag/rules/parser
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brag/rules/lexer
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brag/rules/rule-structs)
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;; quick-and-dirty helper for pos construction.
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(define (p x)
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(pos x #f #f))
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;; FIXME: fix the test cases so they work on locations rather than just offsets.
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(check-equal? (grammar-parser (tokenize (open-input-string "expr : 'hello'")))
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(list (rule (p 1) (p 15)
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(lhs-id (p 1) (p 5) "expr" #f)
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(pattern-lit (p 8) (p 15) "hello" #f))))
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(check-equal? (grammar-parser (tokenize (open-input-string "expr : COLON")))
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(list (rule (p 1) (p 13)
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(lhs-id (p 1) (p 5) "expr" #f)
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(pattern-token (p 8) (p 13) "COLON" #f))))
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(check-equal? (grammar-parser (tokenize (open-input-string "/expr : COLON")))
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(list (rule (p 1) (p 14)
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(lhs-id (p 1) (p 6) "expr" ''hide)
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(pattern-token (p 9) (p 14) "COLON" #f))))
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(check-equal? (grammar-parser (tokenize (open-input-string "@expr : COLON")))
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(list (rule (p 1) (p 14)
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(lhs-id (p 1) (p 6) "expr" ''splice)
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(pattern-token (p 9) (p 14) "COLON" #f))))
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(check-equal? (grammar-parser (tokenize (open-input-string "expr : /COLON COLON")))
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(list (rule (p 1) (p 20)
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(lhs-id (p 1) (p 5) "expr" #f)
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(pattern-seq (p 8) (p 20)
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(list
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(pattern-token (p 8) (p 14) "COLON" 'hide)
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(pattern-token (p 15) (p 20) "COLON" #f))
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#f))))
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(check-equal? (grammar-parser (tokenize (open-input-string "expr : /thing COLON")))
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(list (rule (p 1) (p 20)
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(lhs-id (p 1) (p 5) "expr" #f)
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(pattern-seq (p 8) (p 20)
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(list
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(pattern-id (p 8) (p 14) "thing" 'hide)
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(pattern-token (p 15) (p 20) "COLON" #f))
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#f))))
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(check-equal? (grammar-parser (tokenize (open-input-string "expr : @thing COLON")))
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(list (rule (p 1) (p 20)
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(lhs-id (p 1) (p 5) "expr" #f)
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(pattern-seq (p 8) (p 20)
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(list
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(pattern-id (p 8) (p 14) "thing" 'splice)
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(pattern-token (p 15) (p 20) "COLON" #f))
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#f))))
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(check-equal? (grammar-parser (tokenize (open-input-string "expr : 'hello'*")))
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(list (rule (p 1) (p 16)
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(lhs-id (p 1) (p 5) "expr" #f)
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(pattern-repeat (p 8) (p 16)
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0 #f
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(pattern-lit (p 8) (p 15) "hello" #f)
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#f))))
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(check-equal? (grammar-parser (tokenize (open-input-string "expr : 'hello'+")))
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(list (rule (p 1) (p 16)
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(lhs-id (p 1) (p 5) "expr" #f)
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(pattern-repeat (p 8) (p 16)
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1 #f
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(pattern-lit (p 8) (p 15) "hello" #f)
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#f))))
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(check-equal? (grammar-parser (tokenize (open-input-string "expr : [/'hello']")))
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(list (rule (p 1) (p 18)
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(lhs-id (p 1) (p 5) "expr" #f)
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#;(pattern-maybe (p 8) (p 18)
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(pattern-lit (p 9) (p 17) "hello" 'hide))
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(pattern-repeat (p 8) (p 18)
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0 1
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(pattern-lit (p 9) (p 17) "hello" 'hide)
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#f))))
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(check-equal? (grammar-parser (tokenize (open-input-string "expr : COLON | BLAH")))
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(list (rule (p 1) (p 20)
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(lhs-id (p 1) (p 5) "expr" #f)
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(pattern-choice (p 8) (p 20)
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(list (pattern-token (p 8) (p 13) "COLON" #f)
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(pattern-token (p 16) (p 20) "BLAH" #f))
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#f))))
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(check-equal? (grammar-parser (tokenize (open-input-string "expr : COLON | BLAH | BAZ expr")))
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(list (rule (p 1) (p 31)
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(lhs-id (p 1) (p 5) "expr" #f)
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(pattern-choice (p 8) (p 31)
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(list (pattern-token (p 8) (p 13) "COLON" #f)
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(pattern-token (p 16) (p 20) "BLAH" #f)
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(pattern-seq (p 23) (p 31)
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(list (pattern-token (p 23) (p 26) "BAZ" #f)
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(pattern-id (p 27) (p 31) "expr" #f))
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#f))
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#f))))
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(check-equal? (grammar-parser (tokenize (open-input-string "expr : one two /three")))
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(list (rule (p 1) (p 22)
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(lhs-id (p 1) (p 5) "expr" #f)
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(pattern-seq (p 8) (p 22)
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(list (pattern-id (p 8) (p 11) "one" #f)
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(pattern-id (p 12) (p 15) "two" #f)
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(pattern-id (p 16) (p 22) "three" 'hide))
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#f))))
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(check-equal? (grammar-parser (tokenize (open-input-string "expr : (one two three)")))
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(list (rule (p 1) (p 23)
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(lhs-id (p 1) (p 5) "expr" #f)
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(pattern-seq (p 8) (p 23)
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(list (pattern-id (p 9) (p 12) "one" #f)
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(pattern-id (p 13) (p 16) "two" #f)
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(pattern-id (p 17) (p 22) "three" #f))
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#f))))
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(check-equal? (grammar-parser (tokenize (open-input-string "expr : one two* three")))
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(list (rule (p 1) (p 22)
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(lhs-id (p 1) (p 5) "expr" #f)
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(pattern-seq (p 8) (p 22)
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(list (pattern-id (p 8) (p 11) "one" #f)
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(pattern-repeat (p 12) (p 16) 0 #f (pattern-id (p 12) (p 15) "two" #f) #f)
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(pattern-id (p 17) (p 22) "three" #f))
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#f))))
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(check-equal? (grammar-parser (tokenize (open-input-string "expr : one two+ three")))
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(list (rule (p 1) (p 22)
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(lhs-id (p 1) (p 5) "expr" #f)
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(pattern-seq (p 8) (p 22)
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(list (pattern-id (p 8) (p 11) "one" #f)
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(pattern-repeat (p 12) (p 16) 1 #f (pattern-id (p 12) (p 15) "two" #f) #f)
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(pattern-id (p 17) (p 22) "three" #f))
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#f))))
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(check-equal? (grammar-parser (tokenize (open-input-string "expr : (one two)+ three")))
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(list (rule (p 1) (p 24)
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(lhs-id (p 1) (p 5) "expr" #f)
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(pattern-seq (p 8) (p 24)
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(list (pattern-repeat (p 8) (p 18) 1 #f
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(pattern-seq (p 8) (p 17)
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(list (pattern-id (p 9) (p 12) "one" #f)
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(pattern-id (p 13) (p 16) "two" #f))
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#f)
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#f)
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(pattern-id (p 19) (p 24) "three" #f))
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#f))))
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(check-equal? (grammar-parser (tokenize (open-input-string #<<EOF
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statlist : stat+
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stat: ID '=' expr
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| 'print' expr
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EOF
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)))
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(list (rule (p 1) (p 17)
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(lhs-id (p 1) (p 9) "statlist" #f)
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(pattern-repeat (p 12) (p 17) 1 #f (pattern-id (p 12) (p 16) "stat" #f) #f))
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(rule (p 18) (p 54)
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(lhs-id (p 18) (p 22) "stat" #f)
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(pattern-choice (p 24) (p 54)
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(list (pattern-seq (p 24) (p 35)
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(list (pattern-token (p 24) (p 26) "ID" #f)
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(pattern-lit (p 27) (p 30) "=" #f)
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(pattern-id (p 31) (p 35) "expr" #f))
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#f)
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(pattern-seq (p 42) (p 54)
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(list (pattern-lit (p 42) (p 49) "print" #f)
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(pattern-id (p 50) (p 54) "expr" #f))
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#f))
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#f))))
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