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|
%{
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "ast.h"
AST_NODE *prog;
extern int g_anyErrorOccur;
%}
%union{
char *lexeme;
CON_Type *const1;
AST_NODE *node;
};
%token <lexeme>ID
%token <const1>CONST
%token VOID
%token INT
%token FLOAT
%token IF
%token ELSE
%token WHILE
%token FOR
%token TYPEDEF
%token OP_ASSIGN
%token OP_OR
%token OP_AND
%token OP_NOT
%token OP_EQ
%token OP_NE
%token OP_GT
%token OP_LT
%token OP_GE
%token OP_LE
%token OP_ADD
%token OP_SUB
%token OP_MUL
%token OP_DIV
%token DL_LPAREN
%token DL_RPAREN
%token DL_LBRACK
%token DL_RBRACK
%token DL_LBRACE
%token DL_RBRACE
%token DL_COMMA
%token DL_SEMICOL
%token DL_DOT
%token ERROR
%token RETURN
%{
#include "lexer.c"
int yyerror (char *mesg)
{
fprintf(stderr, "Error found in Line \t%d\tnext token: \t%s\n",
line_number, yytext);
exit(1);
}
%}
%type <node> program global_decl_list global_decl function_decl block stmt_list
%type <node> decl_list decl var_decl type init_id_list init_id stmt relop_expr
%type <node> relop_term relop_factor expr term factor var_ref param_list param
%type <node> dim_fn expr_null id_list dim_decl cexpr mcexpr cfactor
%type <node> assign_expr_list assign_expr rel_op relop_expr_list
%type <node> nonempty_relop_expr_list add_op mul_op dim_list type_decl
%type <node> nonempty_assign_expr_list
%start program
%%
/* ==== Grammar Section ==== */
/* Productions */ /* Semantic actions */
program : global_decl_list
{
$$=Allocate(PROGRAM_NODE);
makeChild($$,$1);
prog=$$;
}
|
{
$$=Allocate(PROGRAM_NODE); prog=$$;
}
;
global_decl_list: global_decl_list global_decl
{
$$ = makeSibling($1, $2);
}
| global_decl
{
$$ = $1;
}
;
global_decl :
/* decl_list function_decl
{
$$ = makeSibling(makeChild(Allocate(VARIABLE_DECL_LIST_NODE), $1), $2);
}
*/
type_decl
{
$$ = $1;
}
| var_decl
{
$$ = $1;
}
| function_decl
{
$$ = $1;
}
;
function_decl : type ID DL_LPAREN param_list DL_RPAREN DL_LBRACE block DL_RBRACE
{
$$ = makeDeclNode(FUNCTION_DECL);
AST_NODE* parameterList = Allocate(PARAM_LIST_NODE);
makeChild(parameterList, $4);
makeFamily($$, 4, $1, makeIDNode($2, NORMAL_ID), parameterList, $7);
}
| VOID ID DL_LPAREN param_list DL_RPAREN DL_LBRACE block DL_RBRACE
{
$$ = makeDeclNode(FUNCTION_DECL);
AST_NODE* parameterList = Allocate(PARAM_LIST_NODE);
makeChild(parameterList, $4);
makeFamily($$, 4, makeIDNode("void", NORMAL_ID), makeIDNode($2, NORMAL_ID), parameterList, $7);
}
| type ID DL_LPAREN DL_RPAREN DL_LBRACE block DL_RBRACE
{
$$ = makeDeclNode(FUNCTION_DECL);
AST_NODE* emptyParameterList = Allocate(PARAM_LIST_NODE);
makeFamily($$, 4, $1, makeIDNode($2, NORMAL_ID), emptyParameterList, $6);
}
| VOID ID DL_LPAREN DL_RPAREN DL_LBRACE block DL_RBRACE
{
$$ = makeDeclNode(FUNCTION_DECL);
AST_NODE* emptyParameterList = Allocate(PARAM_LIST_NODE);
makeFamily($$, 4, makeIDNode("void", NORMAL_ID), makeIDNode($2, NORMAL_ID), emptyParameterList, $6);
}
;
param_list : param_list DL_COMMA param
{
$$ = makeSibling($1, $3);
}
| param
{
$$ = $1;
}
;
param : type ID
{
$$ = makeDeclNode(FUNCTION_PARAMETER_DECL);
makeFamily($$, 2, $1, makeIDNode($2, NORMAL_ID));
}
| type ID dim_fn
{
$$ = makeDeclNode(FUNCTION_PARAMETER_DECL);
makeFamily($$, 2, $1, makeChild(makeIDNode($2, ARRAY_ID), $3));
}
;
dim_fn : DL_LBRACK expr_null DL_RBRACK
{
$$ = $2;
}
| dim_fn DL_LBRACK expr DL_RBRACK
{
$$ = makeSibling($1, $3);
}
;
expr_null :expr
{
$$ = $1;
}
|
{
$$ = Allocate(NUL_NODE);
}
;
block : decl_list stmt_list
{
$$ = Allocate(BLOCK_NODE);
makeFamily($$, 2, makeChild(Allocate(VARIABLE_DECL_LIST_NODE), $1), makeChild(Allocate(STMT_LIST_NODE), $2));
}
| stmt_list
{
$$ = Allocate(BLOCK_NODE);
makeChild($$, makeChild(Allocate(STMT_LIST_NODE), $1));
}
| decl_list
{
$$ = Allocate(BLOCK_NODE);
makeChild($$, makeChild(Allocate(VARIABLE_DECL_LIST_NODE), $1));
}
| {
$$ = Allocate(BLOCK_NODE);
}
;
decl_list : decl_list decl
{
$$ = makeSibling($1, $2);
}
| decl
{
$$ = $1;
}
;
decl : type_decl
{
$$ = $1;
}
| var_decl
{
$$ = $1;
}
;
type_decl : TYPEDEF type id_list DL_SEMICOL
{
$$ = makeDeclNode(TYPE_DECL);
makeFamily($$, 2, $2, $3);
}
| TYPEDEF VOID id_list DL_SEMICOL
{
$$ = makeDeclNode(TYPE_DECL);
makeFamily($$, 2, makeIDNode("void", NORMAL_ID), $3);
}
;
var_decl : type init_id_list DL_SEMICOL
{
$$ = makeDeclNode(VARIABLE_DECL);
makeFamily($$, 2, $1, $2);
}
| ID id_list DL_SEMICOL
{
$$ = makeDeclNode(VARIABLE_DECL);
makeFamily($$, 2, makeIDNode($1, NORMAL_ID), $2);
}
;
type : INT
{
$$ = makeIDNode("int", NORMAL_ID);
}
| FLOAT
{
$$ = makeIDNode("float", NORMAL_ID);
}
;
id_list : ID
{
$$ = makeIDNode($1, NORMAL_ID);
}
| id_list DL_COMMA ID
{
$$ = makeSibling($1, makeIDNode($3, NORMAL_ID));
}
| id_list DL_COMMA ID dim_decl
{
$$ = makeSibling($1, makeChild(makeIDNode($3, ARRAY_ID), $4));
}
| ID dim_decl
{
$$ = makeChild(makeIDNode($1, ARRAY_ID), $2);
}
;
dim_decl : DL_LBRACK cexpr DL_RBRACK
{
$$ = $2;
}
| dim_decl DL_LBRACK cexpr DL_RBRACK
{
$$ = makeSibling($1, $3);
}
;
cexpr : cexpr OP_ADD mcexpr
{
$$ = makeExprNode(BINARY_OPERATION, BINARY_OP_ADD);
makeFamily($$, 2, $1, $3);
} /* This is for array declarations */
| cexpr OP_SUB mcexpr
{
$$ = makeExprNode(BINARY_OPERATION, BINARY_OP_SUB);
makeFamily($$, 2, $1, $3);
}
| mcexpr
{
$$ = $1;
}
;
mcexpr : mcexpr OP_MUL cfactor
{
$$ = makeExprNode(BINARY_OPERATION, BINARY_OP_MUL);
makeFamily($$, 2, $1, $3);
}
| mcexpr OP_DIV cfactor
{
$$ = makeExprNode(BINARY_OPERATION, BINARY_OP_DIV);
makeFamily($$, 2, $1, $3);
}
| cfactor
{
$$ = $1;
}
;
cfactor: CONST
{
$$ = Allocate(CONST_VALUE_NODE);
$$->semantic_value.const1=$1;
}
| DL_LPAREN cexpr DL_RPAREN
{
$$ = $2;
}
;
init_id_list : init_id
{
$$ = $1;
}
| init_id_list DL_COMMA init_id
{
$$ = makeSibling($1, $3);
}
;
init_id : ID
{
$$ = makeIDNode($1, NORMAL_ID);
}
| ID dim_decl
{
$$ = makeChild(makeIDNode($1, ARRAY_ID), $2);
}
| ID OP_ASSIGN relop_expr
{
$$ = makeIDNode($1, WITH_INIT_ID);
makeChild($$, $3);
}
;
stmt_list : stmt_list stmt
{
$$ = makeSibling($1, $2);
}
| stmt
{
$$ = $1;
}
;
stmt : DL_LBRACE block DL_RBRACE
{
$$ = $2;
}
| WHILE DL_LPAREN relop_expr DL_RPAREN stmt
{
$$ = makeStmtNode(WHILE_STMT);
makeFamily($$, 2, $3, $5);
}
| FOR DL_LPAREN assign_expr_list DL_SEMICOL relop_expr_list DL_SEMICOL assign_expr_list DL_RPAREN stmt
{
$$ = makeStmtNode(FOR_STMT);
makeFamily($$, 4, $3, $5, $7, $9);
}
| var_ref OP_ASSIGN relop_expr DL_SEMICOL
{
$$ = makeStmtNode(ASSIGN_STMT);
makeFamily($$, 2, $1, $3);
}
/*
| IF DL_LPAREN relop_expr DL_RPAREN stmt
{
$$ = makeStmtNode(IF_STMT);
makeFamily($$, 2, $3, $5);
}
| TODO: if then else
{
}
*/
| ID DL_LPAREN relop_expr_list DL_RPAREN DL_SEMICOL
{
$$ = makeStmtNode(FUNCTION_CALL_STMT);
makeFamily($$, 2, makeIDNode($1, NORMAL_ID), $3);
}
| DL_SEMICOL
{
$$ = Allocate(NUL_NODE);
}
| RETURN DL_SEMICOL
{
$$ = makeStmtNode(RETURN_STMT);
}
| RETURN relop_expr DL_SEMICOL
{
$$ = makeStmtNode(RETURN_STMT);
makeChild($$, $2);
}
;
assign_expr_list : nonempty_assign_expr_list
{
$$ = Allocate(NONEMPTY_ASSIGN_EXPR_LIST_NODE);
makeChild($$, $1);
}
|
{
$$ = Allocate(NUL_NODE);
}
;
nonempty_assign_expr_list : nonempty_assign_expr_list DL_COMMA assign_expr
{
$$ = makeSibling($1, $3);
}
| assign_expr
{
$$ = $1;
}
;
assign_expr : ID OP_ASSIGN relop_expr
{
$$ = makeStmtNode(ASSIGN_STMT);
makeFamily($$, 2, $1, $3);
}
| relop_expr
{
$$ = $1;
}
;
relop_expr : relop_term
{
$$ = $1;
}
| relop_expr OP_OR relop_term
{
$$ = makeExprNode(BINARY_OPERATION, BINARY_OP_OR);
makeFamily($$, 2, $1, $3);
}
;
relop_term : relop_factor
{
$$ = $1;
}
| relop_term OP_AND relop_factor
{
/*TODO*/
}
;
relop_factor : expr
{
$$ = $1;
}
| expr rel_op expr
{
/*TODO*/
}
;
rel_op : OP_EQ
{
/*TODO*/
}
| OP_GE
{
/*TODO*/
}
| OP_LE
{
/*TODO*/
}
| OP_NE
{
/*TODO*/
}
| OP_GT
{
/*TODO*/
}
| OP_LT
{
/*TODO*/
}
;
relop_expr_list : nonempty_relop_expr_list
{
$$ = Allocate(NONEMPTY_RELOP_EXPR_LIST_NODE);
makeChild($$, $1);
}
|
{
$$ = Allocate(NUL_NODE);
}
;
nonempty_relop_expr_list : nonempty_relop_expr_list DL_COMMA relop_expr
{
$$ = makeSibling($1, $3);
}
| relop_expr
{
$$ = $1;
}
;
expr : expr add_op term
{
/*TODO*/
}
| term
{
$$ = $1;
}
;
add_op : OP_ADD
{
$$ = makeExprNode(BINARY_OPERATION, BINARY_OP_ADD);
}
| OP_SUB
{
$$ = makeExprNode(BINARY_OPERATION, BINARY_OP_SUB);
}
;
term : term mul_op factor
{
/*TODO*/
}
| factor
{
$$ = $1;
}
;
mul_op : OP_MUL
{
/*TODO*/
}
| OP_DIV
{
/*TODO*/
}
;
factor : DL_LPAREN relop_expr DL_RPAREN
{
/*TODO*/
}
/*TODO: | -(<relop_expr>) e.g. -(4) */
| OP_NOT DL_LPAREN relop_expr DL_RPAREN
{
/*TODO*/
}
| CONST
{
$$ = Allocate(CONST_VALUE_NODE);
$$->semantic_value.const1=$1;
}
/*TODO: | -<constant> e.g. -4 */
| OP_NOT CONST
{
/*TODO*/
}
| ID DL_LPAREN relop_expr_list DL_RPAREN
{
/*TODO*/
}
/*TODO: | -<function call> e.g. -f(4) */
| OP_NOT ID DL_LPAREN relop_expr_list DL_RPAREN
{
/*TODO*/
}
| var_ref
{
/*TODO*/
}
/*TODO: | -<var_ref> e.g. -var */
| OP_NOT var_ref
{
/*TODO*/
}
;
var_ref : ID
{
$$ = makeIDNode($1, NORMAL_ID);
}
| ID dim_list
{
/*TODO*/
}
;
dim_list : dim_list DL_LBRACK expr DL_RBRACK
{
/*TODO*/
}
| DL_LBRACK expr DL_RBRACK
{
/*TODO*/
}
;
%%
|
