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[ast] GADTs

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Arnaud DABY-SEESARAM 2022-12-08 19:49:57 +01:00
parent 6308dc893f
commit b57cee3f73
1 changed files with 53 additions and 41 deletions
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src/ast.ml
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@ -1,53 +1,65 @@
type ident = string
type location = Lexing.position * Lexing.position
type const =
| CBool of bool
| CInt of int
type ident = string
type real = float
type _ const =
| CReal: real -> real const
| CBool: bool -> bool const
| CInt: int -> int const
type monop =
| MOp_not
| MOp_minus
| MOp_not | MOp_minus | MOp_pre
type binop =
| BOp_add | BOp_sub | BOp_mul | BOp_div | BOp_mod
| BOp_and | BOp_or | BOp_eq | BOp_neq
| BOp_and | BOp_or | BOp_when
type compop =
| BOp_eq | BOp_neq
| BOp_le | BOp_lt | BOp_ge | BOp_gt
type triop =
| TOp_if
| TOp_if | TOp_merge
type _ t_var =
| BVar: ident -> bool t_var
| IVar: ident -> int t_var
| RVar: ident -> real t_var
type _ t_expression =
| EVar: 'a t_var -> 'a t_expression
| EMonOp: monop * 'a t_expression -> 'a t_expression
| EBinOp: binop * 'a t_expression * 'a t_expression -> 'a t_expression
| ETriOp: triop * bool t_expression * 'a t_expression * 'a t_expression -> 'a t_expression
| EComp: compop * 'a t_expression * 'a t_expression -> bool t_expression
| EConst: 'a const -> 'a t_expression
| ETuple: 'a t_expression * 'b t_expression -> ('a * 'b) t_expression
| EApp: (('a -> 'b) t_node) * 'a t_expression -> 'b t_expression
and _ t_varlist =
| NVar: 'a t_varlist
| CVar: 'a t_var * 'b t_varlist -> ('a * 'b) t_varlist
and 'a t_equation = 'a t_varlist * 'a t_expression
and _ t_eqlist =
| NEql: unit t_eqlist
| CEql: 'a t_equation * 'b t_eqlist -> ('a * 'b) t_eqlist
and _ t_node =
| MakeNode:
ident
* 'i t_varlist * 'o t_varlist
* 'l t_varlist * 'e t_eqlist
-> ('i -> 'o) t_node
type _ t_nodelist =
| NNode: unit t_nodelist
| CNode: ('a -> 'b) t_node * 'c t_nodelist -> (('a -> 'b) * 'c) t_nodelist
type base_ty =
| Tbool
| Tint
type p_pattern =
| PP_var of ident
| PP_tuple of ident list
type p_expression =
| PE_Const of const
| PE_Var of ident
| PE_MonOp of monop * p_expression
| PE_BinOp of binop * p_expression * p_expression
| PE_TriOp of triop * p_expression * p_expression * p_expression
| PE_app of ident * p_expression list
| PE_tuple of p_expression list
| PE_pre of p_expression
| PE_arrow of p_expression * p_expression
type p_equation =
{ peq_patt: p_pattern;
peq_expr: p_expression }
type p_node =
{ pn_name: ident;
pn_input: (ident * base_ty) list;
pn_output: (ident * base_ty) list;
pn_local_vars: (ident* base_ty) list;
pn_equations: p_equation list;
pn_loc: location; }
type p_prog = p_node list
| TBool
| TInt
| TReal