python-student-support-code/interp_Larray.py at main · IUCompilerCourse/python-student-support-code · GitHub

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fromastimport*
frominterp_LtupimportInterpLtup
fromutilsimport*

classInterpLarray(InterpLtup):

definterp_exp(self, e, env):
matche:
caseast.List(es, Load()):
return [self.interp_exp(e, env) foreines]
caseBinOp(left, Mult(), right):
l=self.interp_exp(left, env); r=self.interp_exp(right, env)
returnmul64(l, r)
caseSubscript(tup, index, Load()):
t=self.interp_exp(tup, env)
n=self.interp_exp(index, env)
ifn<len(t):
returnt[n]
else:
raiseTrappedError('array index out of bounds')
caseAllocateArray(length, typ):
array= [None] *length
returnarray
caseCall(Name('array_len'), [tup]):
t=self.interp_exp(tup, env)
returnlen(t)
caseCall(Name('array_load'), [tup, index]):
t=self.interp_exp(tup, env)
n=self.interp_exp(index, env)
ifn<len(t):
returnt[n]
else:
raiseTrappedError('array index out of bounds')
caseCall(Name('array_store'), [tup, index, value]):
t=self.interp_exp(tup, env)
n=self.interp_exp(index, env)
ifn<len(t):
t[n] =self.interp_exp(value, env)
else:
raiseTrappedError('array index out of bounds')
returnNone
case _:
returnsuper().interp_exp(e, env)

definterp_stmt(self, s, env, cont):
matchs:
caseAssign([Subscript(tup, index)], value):
t=self.interp_exp(tup, env)
n=self.interp_exp(index, env)
ifn<len(t):
t[n] =self.interp_exp(value, env)
else:
raiseTrappedError('array index out of bounds')
returnself.interp_stmts(cont, env)
case _:
returnsuper().interp_stmt(s, env, cont)