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Added package for type checking, added type checking for Arithmetic operations

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This commit is contained in:
Mariano Uvalle 2019-04-12 01:00:45 +00:00
parent a64bd11a78
commit e2a3920ef0
8 changed files with 520 additions and 227 deletions
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52
final_lang/fort.py
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@ -1,7 +1,7 @@
import ply.lex as lex
import ply.yacc as yacc
import sys
from stack import Stack
from typeValidation import resultingType
resultQuadruplets = []
quadrupletIndex = 1
@ -14,11 +14,12 @@ jumpsStack = []
exitsStack = []
avail = []
for i in range(50):
avail.append('T' + str(i))
avail.append('$' + str(i))
# Operations related to the table of symbols
symbols = {}
currentIndex = 0
# Our variables start at direction 50, the temps take the first 50 directions.
currentIndex = 50
# Implementation using a dictionary
def addSymbol(name, symbolType):
@ -30,12 +31,18 @@ def addSymbol(name, symbolType):
'direction': currentIndex
}
currentIndex += 1
# Returns the last item of a list without deleting it.
def peek(list):
if (len(list) == 0):
return None
return list[len(list) - 1]
# Checks whether or not a an operand is a temp variable.
def isTemp(operan):
return
tokens = [
'doubleColon',
'coma',
@ -77,6 +84,7 @@ tokens = [
'real',
'subroutine',
]
reserved = {
'program' : 'program',
'end' : 'end',
@ -326,7 +334,7 @@ def p_EItem(p):
'''
EItem : Dimensional action_1
| int action_2
| rea action_2
| rea action_2_rea
'''
def p_EQSymbols(p):
@ -342,12 +350,23 @@ def p_EQSymbols(p):
def p_action_1(p):
"action_1 :"
operandsStack.append(p[-1])
if p[-1] not in symbols:
raise Exception(f'The variable {p[-1]} was not declared')
direction = symbols[p[-1]]['direction']
sType = symbols[p[-1]]['type']
operandsStack.append(f'${direction}')
typesStack.append(sType)
def p_action_2(p):
"action_2 :"
operandsStack.append(p[-1])
typesStack.append('integer')
def p_action_2_rea(p):
"action_2_rea :"
operandsStack.append(p[-1])
typesStack.append('real')
def p_action_3(p):
"action_3 :"
@ -360,8 +379,12 @@ def p_action_4(p):
operator = operatorsStack.pop()
operand2 = operandsStack.pop()
operand1 = operandsStack.pop()
type2 = typesStack.pop()
type1 = typesStack.pop()
resultType = resultingType(operator, type1, type2)
temp = avail.pop(0)
operandsStack.append(temp)
typesStack.append(resultType)
resultQuadruplets.append(str(operator) + ' ' + str(operand1) + ' ' + str(operand2) + ' ' + str(temp) + '\n')
quadrupletIndex += 1
@ -378,8 +401,12 @@ def p_action_6(p):
operator = operatorsStack.pop()
operand2 = operandsStack.pop()
operand1 = operandsStack.pop()
type2 = typesStack.pop()
type1 = typesStack.pop()
resultType = resultingType(operator, type1, type2)
temp = avail.pop(0)
operandsStack.append(temp)
typesStack.append(resultType)
resultQuadruplets.append(str(operator) + ' ' + str(operand1) + ' ' + str(operand2) + ' ' + str(temp) + '\n')
quadrupletIndex += 1
@ -387,14 +414,25 @@ def p_action_6(p):
def p_action_7(p):
"action_7 :"
operandsStack.append(p[-1])
if p[-1] not in symbols:
raise Exception(f'The variable {p[-1]} was not declared')
direction = symbols[p[-1]]['direction']
sType = symbols[p[-1]]['type']
operandsStack.append(f'${direction}')
typesStack.append(sType)
def p_action_8(p):
"action_8 :"
operand2 = operandsStack.pop()
operand1 = operandsStack.pop()
type2 = typesStack.pop()
type1 = typesStack.pop()
# Result type only gets called to make sure the types are compatible.
resultingType('=', type1, type2)
resultQuadruplets.append('= ' + str(operand2) + ' ' + str(operand1) + '\n')
def p_error(p):
print('XXX Invalid program')
print(p)