This grammar describes the language that must be parsed by the parser of project 2. It is the upper part of this grammar - all nonterminals after expr were removed and the productions for expr were changed. Nonterminals are shown in lower-case, terminals (tokens) are shown in upper-case, and the empty string is denoted by . Click here for the list of the tokens.

program	-->	PROGTOK ID LPAR id_list RPAR SEMICOL declarations subroutines block DOT
id_list	-->	ID | id_list COMMA ID
declarations	-->	declarations VARTOK declaration SEMICOL |
declaration	-->	ID declaration_rest
declaration_rest	-->	COMMA ID declaration_rest | COLON type
type	-->	standard_type | ARRAYTOK LBRK NUM DOTDOT NUM RBRK OFTOK standard_type
standard_type	-->	INTTOK | REALTOK | BOOLTOK
subroutines	-->	subroutines subroutine SEMICOL |
subroutine	-->	sub_head declarations block
sub_head	-->	FUNC ID arguments COLON standard_type SEMICOL | PROC ID arguments SEMICOL
arguments	-->	LPAR parameter_list RPAR |
parameter_list	-->	declaration | parameter_list SEMICOL declaration
block	-->	BEGINTOK block_rest
block_rest	-->	statement_list ENDTOK | ENDTOK
statement_list	-->	statement | statement_list SEMICOL statement
statement	-->	variable ASSIGNOP expr | procedure_call | block | IFTOK expr THENTOK statement ELSETOK statement | WHILETOK expr DOTOK statement
variable	-->	ID | ID LBRK expr RBRK
procedure_call	-->	ID | ID LPAR expr_list RPAR
expr_list	-->	expr | expr_list COMMA expr
expr	-->	NUM | BCONST