96 lines
1.5 KiB
OCaml
96 lines
1.5 KiB
OCaml
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%{
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let current_location () = symbol_start_pos (), symbol_end_pos ()
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%}
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%token EOF
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%token<string> IDENT
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%token LPAREN
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%token RPAREN
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%token RETURNS
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%token SEMICOL
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%token COLON
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%token BOOL
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%token INT
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%token LET
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%token TEL
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%token NODE
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%token VAR
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%token EQUAL
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%token COMMA
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/* The Entry Point */
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%start main
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%type <Ast.p_prog> main
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%%
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main: nodes EOF { $1 };
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nodes:
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| /* empty */ { [] }
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| node nodes { $1 :: $2 };
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node:
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NODE IDENT LPAREN in_params RPAREN
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RETURNS LPAREN out_params RPAREN SEMICOL
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local_params
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LET equations TEL
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{ { pn_name = $2;
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pn_input = $4;
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pn_output = $8;
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pn_local_vars = $11;
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pn_equations = $13;
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pn_loc = current_location (); }
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} ;
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in_params:
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| /* empty */ { [] }
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| param_list { $1 }
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;
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out_params: param_list { $1 } ;
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local_params:
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| /* empty */ { [] }
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| VAR param_list_semicol { $2 }
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;
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param_list_semicol:
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| param SEMICOL { $1 }
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| param SEMICOL param_list_semicol { $1 @ $3 }
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param_list:
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| param { $1 }
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| param SEMICOL param_list { $1 @ $3 }
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;
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param:
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ident_comma_list COLON typ
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{ let typ = $3 in List.map (fun i -> (i, typ)) $1 }
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;
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equations:
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| /* empty */ { [] }
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| equation SEMICOL equations
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{ $1 :: $3 }
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;
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equation:
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pattern EQUAL expr
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{ { peq_patt = $1; peq_expr = $3; } }
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;
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pattern: IDENT { $1 };
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expr: IDENT { $1 };
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typ:
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| BOOL { Tbool }
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| INT { Tint }
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;
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ident_comma_list:
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| IDENT { [$1] }
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| IDENT COMMA ident_comma_list { $1 :: $3 }
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;
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