def p_expr(p):
'''Expression : UnaryExpr
| Expression BinaryOp Expression'''
p[0] = Node('Expression')
if len(p) == 2:
p[0].typeList = p[1].typeList
p[0].placeList = p[1].placeList
p[0].sizeList = p[1].sizeList
p[0].code = p[1].code
else:
if p[1].typeList[0] != p[3].typeList[0]:
compilation_errors.add('TypeMismatch', line_number.get()+1, 'Type should be same across binary operator')
elif p[1].typeList[0][0] not in p[2].extra:
compilation_errors.add('TypeMismatch', line_number.get()+1, 'Invalid type for binary expression')
else:
if len(p[2].typeList) > 0:
# for boolean
p[0].typeList = p[2].typeList
else:
p[0].typeList = p[1].typeList
newVar = helper.newVar(p[0].typeList[0], p[1].sizeList[0])
p[0].code = p[1].code
p[0].code += p[3].code
if len(p[2].extra) < 3:
p[0].code.append([p[2].extra['opcode'], newVar, p[1].placeList[0], p[3].placeList[0]])
else:
p[0].code.append([p[2].extra['opcode'] + p[1].typeList[0][0], newVar, p[1].placeList[0], p[3].placeList[0]])
p[0].sizeList = p[1].sizeList
p[0].placeList.append(newVar)
def p_unary_expr(p):
'''UnaryExpr : PrimaryExpr
| UnaryOp UnaryExpr
| NOT UnaryExpr'''
p[0] = Node('UnaryExpr')
if len(p) == 2:
p[0].typeList = p[1].typeList
p[0].placeList = p[1].placeList
p[0].sizeList = p[1].sizeList
p[0].code = p[1].code
elif p[1] == '!':
if p[2].typeList[0] != ['bool']:
compilation_errors.add('TypeMismatch', line_number.get()+1, 'Type should be boolean')
else:
p[0].typeList = p[2].typeList
p[0].placeList = p[2].placeList
p[0].sizeList = p[2].sizeList
p[0].code = p[2].code
newVar = helper.newVar(p[0].typeList[0], p[0].sizeList[0])
p[0].code.append(['!', newVar, p[2].placeList[0]])
else:
if p[2].typeList[0][0] not in p[1].extra:
compilation_errors.add('TypeMismatch', line_number.get()+1, 'Invalid type for unary expression')
else:
p[0].typeList = p[2].typeList
p[0].placeList = p[2].placeList
p[0].sizeList = p[2].sizeList
p[0].code = p[2].code
newVar = helper.newVar(p[0].typeList[0], p[0].sizeList[0])
p[0].code.append([p[1].extra['opcode'], newVar, p[2].placeList[0]])
def p_struct_type(p):
'''StructType : STRUCT LBRACE FieldDeclRep RBRACE'''
p[0] = Node('StructType')
for index_ in range(len(p[3].identList)):
if p[3].identList[index_] in p[3].identList[:index_]:
compilation_errors.add('Redeclaration Error',line_number.get()+1, 'Field %s redeclared'%p[3].identList[index_])
return
p[0] = p[3]
dict_ = {}
offset_ = 0
for index_ in range(len(p[3].identList)):
dict_[p[3].identList[index_]] = {'type':p[3].typeList[index_], 'size': p[3].sizeList[index_], 'offset':offset_}
offset_ += p[3].sizeList[index_]
p[0].typeList = [['struct', dict_]]
p[0].sizeList = [sum(p[3].sizeList)]
