def compileGrammar(method, ruleSet, showStates = None, showItems = None,
statusMsg = 1):
"""given the method and the ruleset, generate a parsing table.
the other options are debug shit
"""
if statusMsg:
print 'scanning grammar for terminals and nonterminals'
terminals, nonTerminals = siftTokens(ruleSet)
digestedRules = digestRules(ruleSet)
if statusMsg:
print 'producing items for grammar'
if method == 'LALR1': #LALR via canonical LR
C = LR1.items(ruleSet, terminals, nonTerminals)
C = LALR.canonicalLRToLALR(C)
elif method == 'LALR0': #LALR via LR1 -roundaboutly
C = LALR.items(ruleSet, terminals, nonTerminals)
#C = LALR.computeLALRKernels(C, ruleSet, terminals, nonTerminals)
elif method == 'LR1': #canonical LR
C = LR1.items(ruleSet, terminals, nonTerminals)
elif method == 'LR0': #SLR (LR0)
C = LR0.items(ruleSet, terminals, nonTerminals)
if showItems != None:
printItems('%s Items' % method, C)
if showItems == 2:
return {}
if statusMsg:
print 'generating state and goto tables'
if method == 'LALR1': #LALR via canonical LR
stateTable, gotoTable = LR1.generateStateTable(C, ruleSet, terminals,
C.index)
elif method == 'LALR0': #LALR via CLR - roundaboutly
stateTable, gotoTable = LR1.generateStateTable(C, ruleSet, terminals,
C.index)
elif method == 'LR1': #canonical LR
stateTable, gotoTable = LR1.generateStateTable(
C, ruleSet, terminals, lambda x, y=C: LR1.fullIndex(y, x))
elif method == 'LR0': #SLR (LR0)
stateTable, gotoTable = LR0.generateStateTable(C, ruleSet, terminals,
nonTerminals)
if showStates != None:
printStateTable(C, terminals, nonTerminals, stateTable, gotoTable)
return {'states': stateTable,
'gotos': gotoTable,
'terminals': terminals,
'rules': digestedRules
}
def sel():
global count
count+=1
selection = "You selected the option " + str(var.get())
f=open("grammar.txt","w")
if(count==1):
s=T.get("1.0", END)
f.write(s)
print("Done")
f.close()
LALR.main()
if(var.get()==3):
table1.foo()
elif(var.get()==1):
#lines =T.get("1.0", END).splitlines()
table.func()
label.config(text = selection)
def compileGrammar(method,
ruleSet,
showStates=None,
showItems=None,
statusMsg=1):
"""given the method and the ruleset, generate a parsing table.
the other options are debug shit
"""
if statusMsg:
print 'scanning grammar for terminals and nonterminals'
terminals, nonTerminals = siftTokens(ruleSet)
digestedRules = digestRules(ruleSet)
if statusMsg:
print 'producing items for grammar'
if method == 'LALR1': #LALR via canonical LR
C = LR1.items(ruleSet, terminals, nonTerminals)
C = LALR.canonicalLRToLALR(C)
elif method == 'LALR0': #LALR via LR1 -roundaboutly
C = LALR.items(ruleSet, terminals, nonTerminals)
#C = LALR.computeLALRKernels(C, ruleSet, terminals, nonTerminals)
elif method == 'LR1': #canonical LR
C = LR1.items(ruleSet, terminals, nonTerminals)
elif method == 'LR0': #SLR (LR0)
C = LR0.items(ruleSet, terminals, nonTerminals)
if showItems != None:
printItems('%s Items' % method, C)
if showItems == 2:
return {}
if statusMsg:
print 'generating state and goto tables'
if method == 'LALR1': #LALR via canonical LR
stateTable, gotoTable = LR1.generateStateTable(C, ruleSet, terminals,
C.index)
elif method == 'LALR0': #LALR via CLR - roundaboutly
stateTable, gotoTable = LR1.generateStateTable(C, ruleSet, terminals,
C.index)
elif method == 'LR1': #canonical LR
stateTable, gotoTable = LR1.generateStateTable(
C, ruleSet, terminals, lambda x, y=C: LR1.fullIndex(y, x))
elif method == 'LR0': #SLR (LR0)
stateTable, gotoTable = LR0.generateStateTable(C, ruleSet, terminals,
nonTerminals)
if showStates != None:
printStateTable(C, terminals, nonTerminals, stateTable, gotoTable)
return {
'states': stateTable,
'gotos': gotoTable,
'terminals': terminals,
'rules': digestedRules
}