82 lines
1.8 KiB
Plaintext
82 lines
1.8 KiB
Plaintext
module IBAF-Start
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imports
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IBAF-Expressions
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IBAF-Statements
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Funcons
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// Language "IBAFlang"
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lexical syntax // Language
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LEX-keyword = "else"
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LEX-keyword = "false"
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LEX-keyword = "if"
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LEX-keyword = "true"
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LEX-keyword = "while"
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LEX-keyword = "int"
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syntax // Language
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context-free syntax // Language
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L-start.L-start--L-pgm =
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L-pgm
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L-pgm.L-pgm--R-int-L-idlist-SEMI-L-stmt =
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"int" L-idlist ";" L-stmt
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L-idlist.L-idlist--L-id-C-COMMA-L-idlist-D-Q =
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L-id L-COMMA-L-idlist?
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L-COMMA-L-idlist.L-COMMA-L-idlist--COMMA-L-idlist =
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"," L-idlist
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L-keyword.LEX-keyword =
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LEX-keyword
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context-free syntax // Semantics
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FCT.T-start =
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"start" "[:" L-start ":]"
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FCT.T-run =
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"run" "[:" L-pgm ":]"
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FCT-SEQ.T-declare-int-vars =
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"declare-int-vars" "[:" L-idlist ":]"
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FCT-Quoted.LEX-keyword = LEX-keyword
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context-free syntax // Desugaring
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variables // Meta-variables
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L-start = "(:START" [1-9]? ":)" {prefer}
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L-start? = "(:START" [1-9]? "?:)" {prefer}
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L-start* = "(:START" [1-9]? "*:)" {prefer}
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L-start+ = "(:START" [1-9]? "+:)" {prefer}
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L-pgm = "(:Pgm" [1-9]? ":)" {prefer}
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L-pgm? = "(:Pgm" [1-9]? "?:)" {prefer}
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L-pgm* = "(:Pgm" [1-9]? "*:)" {prefer}
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L-pgm+ = "(:Pgm" [1-9]? "+:)" {prefer}
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L-idlist = "(:IL" [1-9]? ":)" {prefer}
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L-idlist? = "(:IL" [1-9]? "?:)" {prefer}
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L-idlist* = "(:IL" [1-9]? "*:)" {prefer}
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L-idlist+ = "(:IL" [1-9]? "+:)" {prefer}
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// SDF comments
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lexical syntax
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LEX-id = LEX-keyword {reject}
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lexical restrictions
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LEX-id -/- [A-Za-z0-9]
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context-free syntax
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L-exp.L-exp--L-exp-PLUS-L-exp =
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L-exp "+" L-exp
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{assoc}
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L-exp.L-exp--L-exp-AMPERSAND-AMPERSAND-L-exp =
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L-exp "&&" L-exp
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{assoc}
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L-stmt.L-stmt--L-stmt-L-stmt =
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L-stmt L-stmt
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{right}
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sorts // ASTs
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T-start
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