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parser.mly
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%{
open Ast
%}
%token <int> INT
%token <float> DOUBLE
%token <string> ID
%token <char> CHAR
%token <string> STRING
%token INT_T
%token CHAR_T
%token BOOL_T
%token DOUBLE_T
%token SEMICOLON
%token LEFT_BRACKET
%token RIGHT_BRACKET
%token LEFT_PAREN
%token RIGHT_PAREN
%token VOID
%token BYREF
%token LEFT_CURL
%token RIGHT_CURL
%token COLON
%token IF
%token ELSE
%token FOR
%token CONTINUE
%token BREAK
%token RETURN
%token TRUE
%token FALSE
%token NULL
%token QUESTION_MARK
%token NEW
%token DELETE
%token NOT
%token MULTI
%token DIV
%token MOD
%token PLUS
%token MINUS
%token AMBER
%token LESS
%token GREATER
%token LESSEQ
%token GREATEREQ
%token EQ
%token NOTEQ
%token AND
%token OR
%token COMMA
%token PLUSPLUS
%token MINUSMINUS
%token ASSIGN
%token ASSIGN_MULTI
%token ASSIGN_DIV
%token ASSIGN_MOD
%token ASSIGN_PLUS
%token ASSIGN_MINUS
%token EOF
%start <unit> prog
%left COMMA
%right ASSIGN ASSIGN_MULTI ASSIGN_DIV ASSIGN_MOD ASSIGN_PLUS ASSIGN_MINUS
%right QUEST
%nonassoc QUESTION_MARK
(*%nonassoc BINARY*)
%left OR
%left AND
%nonassoc EQUALITIES
%nonassoc EQ NOTEQ GREATEREQ GREATER LESSEQ LESS
(*%left OTHER_BINS*)
%left PLUS MINUS
%left MULTI DIV MOD
%nonassoc LEFT_PAREN
%nonassoc PLUSPLUS MINUSMINUS
%nonassoc NEW DELETE
%nonassoc AMBER
%nonassoc PLUSPLUS_PRE
%nonassoc LEFT_BRACKET
%nonassoc LOWER_THAN_ELSE
%nonassoc ELSE
%%
prog:
| declaration; declaration*; EOF { astTree := !astTree @ ($1 :: $2) }
;
declaration:
| var_declaration { $1 }
| fun_declaration { $1 }
| fun_definition { $1 }
;
var_declaration:
| object_type; declarator; other_decs*; SEMICOLON { VarDecl ($1, $2 :: $3) }
;
other_decs:
| COMMA; declarator; { $2 }
object_type:
| basic_type; MULTI* { OType ($1, List.length $2) }
;
basic_type:
| INT_T { TInt }
| CHAR_T { TChar }
| BOOL_T { TBool }
| DOUBLE_T { TDouble }
;
declarator:
| ID; array_def? { ADeclarator ($1, $2) }
;
array_def:
| LEFT_BRACKET; const_expr; RIGHT_BRACKET { $2 }
;
fun_declaration:
| VOID ; ID; LEFT_PAREN; parameter_list?; RIGHT_PAREN; SEMICOLON { let oType = OType(TVoid, 0) in
FunDecl (oType, $2, $4) }
| object_type; ID; LEFT_PAREN; parameter_list?; RIGHT_PAREN; SEMICOLON { let oType = $1 in
FunDecl (oType, $2, $4)}
;
parameter_list:
| parameter; other_params* { $1 :: $2 }
;
other_params:
| COMMA; parameter { $2 }
;
parameter:
| BYREF?; object_type; ID { let v =
match $1 with
| None -> Param ($2, $3)
| _ -> ParamByRef ($2, $3)
in v
}
;
fun_definition:
| VOID; ID; LEFT_PAREN; parameter_list?; RIGHT_PAREN; LEFT_CURL;
declaration*; statement*; RIGHT_CURL { let oType = OType(TVoid, 0) in
FunDef (oType, $2, $4, $7, $8) }
| object_type; ID; LEFT_PAREN; parameter_list?; RIGHT_PAREN; LEFT_CURL;
declaration*; statement*; RIGHT_CURL { let oType = $1 in
FunDef (oType, $2, $4, $7, $8)}
;
statement:
| SEMICOLON { SSemicolon }
| expression; SEMICOLON { SExpr $1 }
| LEFT_CURL; statement*; RIGHT_CURL { SBlock $2 } (*NOTE: should we use fold here?*)
| IF; LEFT_PAREN; expression; RIGHT_PAREN; statement { SIf ($3, $5) } %prec LOWER_THAN_ELSE
| IF; LEFT_PAREN; expression; RIGHT_PAREN; statement; ELSE; statement { SIfElse ($3, $5, $7) }
| label?; FOR; LEFT_PAREN; expression?; SEMICOLON; expression?;
SEMICOLON; expression?; RIGHT_PAREN; statement { SFor ($1, $4, $6, $8, $10) }
| CONTINUE; ID?; SEMICOLON { SContinue $2 }
| BREAK; ID?; SEMICOLON { SBreak $2 }
| RETURN; expression?; SEMICOLON { SReturn $2 }
;
label:
| ID; COLON { $1 }
;
expression:
| ID { EId $1 }
| LEFT_PAREN; expression; RIGHT_PAREN { $2 }
| TRUE { EBool true }
| FALSE { EBool false }
| NULL { ENull }
| INT { EInt $1 }
| CHAR { EChar $1 }
| DOUBLE { EDouble $1 }
| STRING { EString $1 }
| ID; LEFT_PAREN; expression_list?; RIGHT_PAREN { EFCall ($1, $3) }
| expression; array_exp { EArray ($1, $2) }
| unary_op; expression { EUnary ($1, $2) } %prec AMBER
| expression; lower_binary_op; expression { EBinOp ($2, $1, $3) } %prec EQUALITIES
| expression; binary_comma_op; expression { EBinOp ($2, $1, $3) } %prec COMMA
| expression; pm_binary_op; expression { EBinOp ($2, $1, $3) } %prec PLUS
| expression; mdm_binary_op; expression { EBinOp ($2, $1, $3) } %prec MULTI
| unary_assign; expression { EUnAssign ($1, LocLeft, $2) } %prec PLUSPLUS_PRE
| expression; unary_assign { EUnAssign ($2, LocRight, $1) }
| expression; binary_assign; expression { EBinAssign ($2, $1, $3) } %prec ASSIGN_MINUS
| LEFT_PAREN; object_type; RIGHT_PAREN; expression { ECast ($2, $4) } %prec LEFT_PAREN
| expression; QUESTION_MARK; expression; COLON; expression { EConditional ($1, $3, $5) } %prec QUEST
| new_expression { $1 }
| DELETE; expression { EDelete $2 }
;
new_expression_basic:
| NEW; basic_type { $2 }
new_expression:
| new_expression_basic { ENew (OType($1, 1), None ) }
| new_expression_basic; array_exp { ENew (OType($1, 1), Some $2) }
| new_expression_basic; MULTI+; opt_exp? { ENewP (OType($1, 1 + List.length $2), $3) }
;
opt_exp:
| array_exp { (Some $1, None) }
| expression { (None, Some $1) }
array_exp:
| LEFT_BRACKET; expression; RIGHT_BRACKET { ArrExp $2 }
;
expression_list:
| expression; other_expr* { $1 :: $2 }
;
other_expr:
| COMMA; expression { $2 }
;
const_expr:
| expression { $1 }
;
unary_op:
| AMBER { UnaryRef }
| MULTI { UnaryDeref }
| PLUS { UnaryPlus }
| MINUS { UnaryMinus }
| NOT { UnaryNot }
;
pm_binary_op:
| PLUS { BinPlus }
| MINUS { BinMinus }
mdm_binary_op:
| DIV { BinDiv }
| MULTI { BinMulti }
| MOD { BinMod }
(*
other_binary_op:
| DIV { BinDiv }
| MULTI { BinMulti }
| MOD { BinMod }
| PLUS { BinPlus }
| MINUS { BinMinus }
*)
lower_binary_op:
| LESS { BinLess }
| GREATER { BinGreater }
| LESSEQ { BinLessEq }
| GREATEREQ { BinGreaterEq }
| EQ { BinEq }
| NOTEQ { BinNotEq }
| AND { BinAnd }
| OR { BinOr }
(*| COMMA { BinComma }*)
;
binary_comma_op:
| COMMA { BinComma }
unary_assign:
| PLUSPLUS { UnaryPlusPlus }
| MINUSMINUS { UnaryMinusMinus }
;
binary_assign:
| ASSIGN { BinAssign }
| ASSIGN_MULTI { BinAssignMulti }
| ASSIGN_DIV { BinAssignDiv }
| ASSIGN_MOD { BinAssignMod }
| ASSIGN_PLUS { BinAssignPlus }
| ASSIGN_MINUS { BinAssignMinus }
;