grammar.md

#FILE : grammar.cfg

Input format for newpgl

1. Comments: ..1. Single Line Comments : ?? ..2. Multi Line Comments : /* */

expression Rules:

primary-expression

identifier
constant
string literal

postfix-expression

primary-expression
postfix-expression [expression]
postfix-expression ( )
postfix-expression ( argument-expression-list)
postfix-expression . identifier
postfix-expression -> identifier
postfix-expression pp  									(pp ==  ++)
postfix-expression mm									(mm ==  --)

argument-expression-list

assignment-expression
argument-expression-list , assignment-expression

unary-expression

postfix-expression
pp unary-expression
mm unary-expression
unary-operator cast-expression
SO unary-expression 									(SO == sizeof)
SO ( type-name )

unary-operator

&
mul  													( mul == *)
add 													( add == +)
sub 													( sub == -)
~
not 													( not == !)

cast-expression

unary-expression
( type-name ) cast-expression

multiplicative-expression

cast-expression
multiplicative-expression mul cast-expression
multiplicative-expression div cast-expression
multiplicative-expression mod cast-expression

additive-expression

multiplicative-expression
additive-expression add multiplicative-expression
additive-expression sub multiplicative-expression

shift-expression

additive-expression
shift-expression << additive-expression
shift-expression >> additive-expression

relational-expression

shift-expression
relational-expression lt shift-expression 				(lt == <)
relational-expression gt shift-expression 				(gt == >)
relational-expression lte shift-expression 				(lte == <=)
relational-expression gte shift-expression 				(gte == >=)

equality-expression

relational-expression
equality-expression eqeq relational-expression			(eqeq == "==")
equality-expression neq relational-expression			(neq == "!=")

AND-expression

equality-expression
AND-expression & equality-expression

exclusive-OR-expression

AND-expression
exclusive-OR-expression ^ AND-expression

inclusive-OR-expression

exclusive-OR-expression
inclusive-OR-expression | exclusive-OR-expression

logical-AND-expression

inclusive-OR-expression
logical-AND-expression && inclusive-OR-expression

logical-OR-expression

logical-AND-expression
logical-OR-expression || logical-AND-expression

conditional-expression

logical-OR-expression
logical-OR-expression ? expression : conditional-expression

assignment-expression

conditional-expression
unary-expression assignment-operator assignment-expression

assignment-operator

eq 															(eq == "=")

/* PLEASE DO THIS LATER */

expression

assignment-expression
expression , assignment-expression

constant-expression

conditional-expression

DECLARATION RULES

declaration

declaration-specifiers
declaration-specifiers init-declarator-list

declaration-specifiers

storage-class-specifier
type-specifier
type-qualifier
storage-class-specifier declaration-specifiers
type-specifier 			declaration-specifiers
type-qualifier			declaration-specifiers

init-declarator-list

init-declarator
init-declarator-list , init-declarator

init-declarator

declarator
declarator eq initializer

storage-class-specifier

typedef
extern
static
auto
register

type-specifier

void
char
short
int
long
float
double
signed
unsigned
struct-or-union-specifier
enum-specifier
typedef-name

struct-or-union-specifier

struct-or-union { struct-declaration-list }
struct-or-union identifier { struct-declaration-list }
struct-or-union identifier

struct-or-union

struct
union

struct-declaration-list

struct-declaration
struct-declaration-list struct-declaration

struct-declaration

specifier-qualifier-list struct-declarator-list

specifier-qualifier-list

type-specifier
type-qualifier
type-specifier specifier-qualifier-list
type-qualifier specifier-qualifier-list

struct-declarator-list

struct-declarator
struct-declarator-list , struct-declarator

struct-declarator

declarator
constant-expression
declarator constant-expression

enum-specifier

enum { enumerator-list }
enum identifier { enumerator-list }
enum identifier

enumerator-list

enumerator
enumerator-list , enumerator

enumerator

enumeration-constant
enumeration-constant eq constant-expression