126 lines
3.5 KiB
OCaml
126 lines
3.5 KiB
OCaml
(**************************************************************************)
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(* *)
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(* Heptagon *)
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(* *)
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(* Author : Marc Pouzet *)
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(* Organization : Demons, LRI, University of Paris-Sud, Orsay *)
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(* *)
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(**************************************************************************)
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(* Object code internal representation *)
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(** { 3 Semantics }
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Any variable is a reference to a constant memory.
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Thus [p = e] is not the change of the reference,
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but a recursive copy of what is referenced (deep copy).
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As an example, [x = 3] but also [x = \[3; 4; 5\]]
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and [t1 = t2] with the content of the array [t2] copied into the array [t1].
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Obc is also "SSA" in the sens that a variable is assigned a value only once per call of [step] etc.
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Thus arguments are passed as constant references to a constant memory.
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One exception to the SSA rule is through the [mutable] variables.
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Theses variables can be assigned multiple times.
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Thus a [mutable] argument is passed as a reference to a constant memory.
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*)
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open Misc
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open Names
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open Idents
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open Types
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open Signature
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open Location
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type class_name = qualname
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type op_name = qualname
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type obj_ident = var_ident
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type type_dec =
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{ t_name : type_name;
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t_desc : tdesc;
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t_loc : location }
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and tdesc =
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| Type_abs
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| Type_alias of ty
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| Type_enum of constructor_name list
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| Type_struct of structure
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type const_dec = {
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c_name : qualname;
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c_value : static_exp;
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c_type : ty;
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c_loc : location }
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type pattern = { pat_desc : pat_desc; pat_ty : ty; pat_loc : location }
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and pat_desc =
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| Lvar of var_ident
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| Lmem of var_ident
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| Lfield of pattern * field_name
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| Larray of pattern * exp
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and exp = { e_desc : exp_desc; e_ty : ty; e_loc : location }
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and exp_desc =
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| Epattern of pattern
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| Econst of static_exp
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| Eop of op_name * exp list
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| Estruct of type_name * (field_name * exp) list
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| Earray of exp list
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| Ebang of exp
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type obj_ref =
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| Oobj of obj_ident
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| Oarray of obj_ident * pattern
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type method_name =
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| Mreset
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| Mstep
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type act =
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| Aassgn of pattern * exp
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| Acall of pattern list * obj_ref * method_name * exp list
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| Aasync_call of async_t * pattern list * obj_ref * method_name * exp list
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| Acase of exp * (constructor_name * block) list
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| Afor of var_dec * static_exp * static_exp * block
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| Ablock of block
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and block =
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{ b_locals : var_dec list;
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b_body : act list }
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and var_dec =
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{ v_ident : var_ident;
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v_type : ty;
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v_loc : location }
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type obj_dec =
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{ o_ident : obj_ident;
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o_async : async_t option;
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o_class : class_name;
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o_params : static_exp list;
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o_size : static_exp option; (** size of the array if the declaration is an array of obj *)
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o_loc : location }
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type method_def =
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{ m_name : method_name;
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m_inputs : var_dec list;
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m_outputs : var_dec list;
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m_body : block; }
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type class_def =
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{ cd_name : class_name;
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cd_mems : var_dec list;
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cd_objs : obj_dec list;
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cd_params : param list;
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cd_methods: method_def list;
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cd_loc : location }
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type program =
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{ p_modname : modul;
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p_opened : modul list;
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p_types : type_dec list;
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p_consts : const_dec list;
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p_defs : class_def list }
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