FunctionsAndDeclarations: FunctionDefinition	{;}
	| FunctionDefinition Expr2	{;}
	| FunctionDeclaration	{;}
	| FunctionDeclaration Expr2	{;}
	| Declaration	{;}
	| Declaration Expr2	{;}
	;

Expr2: FunctionDefinition	{;}
	| FunctionDeclaration	{;}
	| FunctionDefinition Expr2	{;}
	| FunctionDeclaration Expr2	{;}
	| Declaration	{;}
	| Declaration Expr2	{;}
	;

FunctionDefinition: TypeSpec FunctionDeclarator FunctionBody	{;}
	;

FunctionBody: LBRACE DeclarationsAndStatements RBRACE	{;}
	| LBRACE RBRACE	{;}

	;

DeclarationsAndStatements: Statement	{;}
	| Statement DeclarationsAndStatements	{;}
	| Declaration	{;}
	| Declaration DeclarationsAndStatements	{;}
	;

FunctionDeclaration:TypeSpec FunctionDeclarator SEMI	{;}
	;

FunctionDeclarator: ID LPAR ParameterList RPAR	{;}
	;

ParameterList: ParameterDeclaration	{;}
	| ParameterDeclaration COMMA ParameterList	{;}
	;

ParameterDeclaration: TypeSpec ID	{;}
	| TypeSpec	{;}
	;

Declaration: TypeSpec Declarator SEMI	{;}
	| TypeSpec Declarator Expr3 SEMI	{;}
	;

Expr3: COMMA Declarator Declaration	{;}
	;

TypeSpec: CHAR	{;}
	| INT	{;}
	| VOID	{;}
	| SHORT	{;}
	| DOUBLE	{;}
	;

Declarator: ID	{;}
	| ID ASSIGN Expr	{;}
	;

Statement: Expr SEMI	{;}
	| SEMI	{;}
	| LBRACE Statement RBRACE	{;}
	| IF LPAR Expr RPAR Statement ELSE Statement	{;}
	| IF LPAR Expr RPAR Statement	{;}
	| WHILE LPAR Expr RPAR Statement	{;}
	| RETURN Expr SEMI	{;}
	| RETURN SEMI	{;}
	;


Expr: Expr ASSIGN Expr	{;}
	| Expr COMMA Expr	{;}
	| Expr PLUS Expr	{;}
	| Expr MINUS Expr	{;}
	| Expr MUL Expr	{;}
	| Expr DIV Expr	{;}
	| Expr MOD Expr	{;}
	| Expr OR Expr	{;}
	| Expr AND Expr	{;}
	| Expr BITWISEAND Expr	{;}
	| Expr BITWISEOR Expr	{;}
	| Expr BITWISEXOR Expr	{;}
	| Expr EQ Expr	{;}
	| Expr NE Expr	{;}
	| Expr LE Expr	{;}
	| Expr GE Expr	{;}
	| Expr LT Expr	{;}
	| Expr GT Expr	{;}
	| PLUS Expr	{;}
	| MINUS Expr	{;}
	| NOT Expr	{;}
	| ID LPAR RPAR	{;}
	| ID LPAR Expr RPAR	{;}
	| INTLIT	{;}
	| CHRLIT	{;}
	| REALLIT	{;}
	;