104 lines
2.1 KiB
Plaintext
104 lines
2.1 KiB
Plaintext
module IBAF-Start
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imports
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Funcons
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// Language "IBAFlang"
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lexical syntax // Language
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// #1 Arithmetic expressions
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LEX-DASH = "-"
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LEX-decimal = ( [0-9] )+
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LEX-id = ( [A-Z] | [a-z] )+
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syntax // Language
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// #1 Arithmetic expressions
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context-free syntax // Language
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L-start.L-start--L-aexp =
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L-aexp
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// #1 Arithmetic expressions
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L-aexp.L-aexp--L-num =
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L-num
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L-aexp.L-aexp--L-id =
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L-id
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L-aexp.L-aexp--L-aexp-PLUS-L-aexp =
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L-aexp "+" L-aexp
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L-aexp.L-aexp--L-aexp-SLASH-L-aexp =
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L-aexp "/" L-aexp
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L-aexp.L-aexp--LPAREN-L-aexp-RPAREN =
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"(" L-aexp ")"
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L-decimal.LEX-decimal =
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LEX-decimal
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L-id.LEX-id =
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LEX-id
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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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// #1 Arithmetic expressions
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FCT.T-eval-arith =
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"eval-arith" "[:" L-aexp ":]"
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FCT-Quoted.L-decimal = L-decimal
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FCT.T-int-val =
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"int-val" "[:" L-num ":]"
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FCT-Quoted.L-id = L-id
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FCT.T-id =
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"id" "[:" L-id ":]"
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context-free syntax // Desugaring
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// #1 Arithmetic expressions
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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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// #1 Arithmetic expressions
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L-aexp = "(:AExp" [1-9]? ":)" {prefer}
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L-aexp? = "(:AExp" [1-9]? "?:)" {prefer}
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L-aexp* = "(:AExp" [1-9]? "*:)" {prefer}
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L-aexp+ = "(:AExp" [1-9]? "+:)" {prefer}
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L-num = "(:N" [1-9]? ":)" {prefer}
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L-num? = "(:N" [1-9]? "?:)" {prefer}
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L-num* = "(:N" [1-9]? "*:)" {prefer}
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L-num+ = "(:N" [1-9]? "+:)" {prefer}
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L-decimal = "(:D" [1-9]? ":)" {prefer}
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L-decimal? = "(:D" [1-9]? "?:)" {prefer}
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L-decimal* = "(:D" [1-9]? "*:)" {prefer}
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L-decimal+ = "(:D" [1-9]? "+:)" {prefer}
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L-id = "(:I" [1-9]? ":)" {prefer}
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L-id? = "(:I" [1-9]? "?:)" {prefer}
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L-id* = "(:I" [1-9]? "*:)" {prefer}
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L-id+ = "(:I" [1-9]? "+:)" {prefer}
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// SDF comments
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// #1 Arithmetic expressions
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sorts // ASTs
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T-start
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