Created by PLY version 3.11 (http://www.dabeaz.com/ply)

Grammar

Rule 0     S' -> expression
Rule 1     expression -> CONST
Rule 2     expression -> WHILE expression DO LBRACE expression RBRACE

Terminals, with rules where they appear

CONST                : 1
DO                   : 2
LBRACE               : 2
RBRACE               : 2
WHILE                : 2
error                : 

Nonterminals, with rules where they appear

expression           : 2 2 0

Parsing method: LALR

state 0

    (0) S' -> . expression
    (1) expression -> . CONST
    (2) expression -> . WHILE expression DO LBRACE expression RBRACE

    CONST           shift and go to state 2
    WHILE           shift and go to state 3

    expression                     shift and go to state 1

state 1

    (0) S' -> expression .



state 2

    (1) expression -> CONST .

    $end            reduce using rule 1 (expression -> CONST .)
    DO              reduce using rule 1 (expression -> CONST .)
    RBRACE          reduce using rule 1 (expression -> CONST .)


state 3

    (2) expression -> WHILE . expression DO LBRACE expression RBRACE
    (1) expression -> . CONST
    (2) expression -> . WHILE expression DO LBRACE expression RBRACE

    CONST           shift and go to state 2
    WHILE           shift and go to state 3

    expression                     shift and go to state 4

state 4

    (2) expression -> WHILE expression . DO LBRACE expression RBRACE

    DO              shift and go to state 5


state 5

    (2) expression -> WHILE expression DO . LBRACE expression RBRACE

    LBRACE          shift and go to state 6


state 6

    (2) expression -> WHILE expression DO LBRACE . expression RBRACE
    (1) expression -> . CONST
    (2) expression -> . WHILE expression DO LBRACE expression RBRACE

    CONST           shift and go to state 2
    WHILE           shift and go to state 3

    expression                     shift and go to state 7

state 7

    (2) expression -> WHILE expression DO LBRACE expression . RBRACE

    RBRACE          shift and go to state 8


state 8

    (2) expression -> WHILE expression DO LBRACE expression RBRACE .

    $end            reduce using rule 2 (expression -> WHILE expression DO LBRACE expression RBRACE .)
    DO              reduce using rule 2 (expression -> WHILE expression DO LBRACE expression RBRACE .)
    RBRACE          reduce using rule 2 (expression -> WHILE expression DO LBRACE expression RBRACE .)