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Interpreter Environment Change Diff

作成日 5 年前差分は期限切れになりません

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111 行

# Top level function that interprets an entire program. It creates the

# initial environment that's used for storing variables.

def interpret_program(model):

# Make the initial environment (a dict). The environment is

# where you will create and store variables.

env = {'constants':{}, 'variables':{}}

env = {}

for structure in model.statements:

interpret(structure, env)

# Internal function to interpret a node in the environment. You need

# to expand to cover all of the classes in the model.py file.

def interpret(node, env):

# Expand to check for different node types

if isinstance(node, Integer):

return int(node.value)

elif isinstance(node, Float):

return node.value

elif isinstance(node, BinaryOperator):

if node.op == '*':

return interpret(node.left, env) * interpret(node.right, env)

elif node.op == '/':

return interpret(node.left, env) / interpret(node.right, env)

elif node.op == '+':

return interpret(node.left, env) + interpret(node.right, env)

elif node.op == '-':

return interpret(node.left, env) - interpret(node.right, env)

elif isinstance(node, Comparison):

if node.op == '>':

return interpret(node.left, env) > interpret(node.right, env)

elif node.op == '<':

return interpret(node.left, env) < interpret(node.right, env)

elif node.op == '==':

return interpret(node.left, env) == interpret(node.right, env)

elif node.op == '>=':

return interpret(node.left, env) >= interpret(node.right, env)

elif node.op == '<=':

return interpret(node.left, env) <= interpret(node.right, env)

elif node.op == '!=':

return interpret(node.left, env) != interpret(node.right, env)

elif isinstance(node, Print):

print(interpret(node.value, env))

elif isinstance(node, VariableAssignment):

# if node.type.string_representation == the start of type checking

env[str(node.name)] = {"value": interpret(node.value, env), "mutable": True}

env['variables'][str(node.name)] = interpret(node.value, env)

return Unit()

elif isinstance(node, ConstantAssignment):

env['constants'][str(node.name)] = interpret(node.value, env)

env[str(node.name)] = {"value": interpret(node.value, env), "mutable": False}

return Unit()

elif isinstance(node, VariableDeclaration):

env['variables'][str(node.name)] = "WABBITASSIGNMENTINWAITING"

env[str(node.name)] = {"value": None, "mutable": True}

return Unit()

elif isinstance(node, VariableReAssignment):

if str(node.name) in env['variables'].keys():

if str(node.name) in env.keys():

env['variables'][str(node.name)] = interpret(node.value, env)

if not env[str(node.name)]['mutable']:

elif str(node.name) in env['constants'].keys():

raise RuntimeError("Cannot reassign the value of a constant")

else:

env[str(node.name)] = interpret(node.value, env)

else:

raise RuntimeError(f"{node.name} not found for reassignment")

return Unit()

elif isinstance(node, Name):

if node.name in env['variables'].keys():

if node.name in env.keys():

return env['variables'].get(node.name)

return env.get(node.name).get('value')

elif node.name in env['constants'].keys():

return env['constants'].get(str(node.name))

else:

raise RuntimeError(f"'{node.name}' not defined")

elif isinstance(node, Negative):

# gotta check if its type that can be negative

return interpret(node.value, env) * -1

elif isinstance(node, Conditional):

if interpret(node.if_condition, env):

result = interpret(node.if_block, env)

if isinstance(result, Break):

return Break()

else:

if node.else_block:

result = interpret(node.else_block, env)

if isinstance(result, Break):

return Break()

elif isinstance(node, WhileLoop):

if interpret(node.while_condition, env):

result = interpret(node.while_block, env)

if not isinstance(result, Break):

interpret(node, env)

else:

return Unit()

elif isinstance(node, Block):

for statement in node.statements:

maybe_flow_interruptor = interpret(statement, env)

if isinstance(maybe_flow_interruptor, Continue):

return Unit()

elif isinstance(maybe_flow_interruptor, Break):

return Break()

return Unit()

elif isinstance(node, CompoundExpression):

final_statement = None

for statement in node.statements:

final_statement = interpret(statement, env)

return final_statement

elif isinstance(node, Break):

return Break()

elif isinstance(node, Continue):

return Continue()

elif isinstance(node, WabbitType):

return Unit()

elif isinstance(node, WabbitBoolean):

return node.value

elif isinstance(node, Character):

return str(node.value)

else:

raise RuntimeError(f"Can't interpret {node}")

保存された差分

原文

ファイルを開く

# Top level function that interprets an entire program. It creates the
# initial environment that's used for storing variables.

def interpret_program(model):
    # Make the initial environment (a dict).  The environment is
    # where you will create and store variables.
    env = {'constants':{}, 'variables':{}}
    for structure in model.statements:
        interpret(structure, env)

# Internal function to interpret a node in the environment.  You need
# to expand to cover all of the classes in the model.py file.

def interpret(node, env):
    # Expand to check for different node types
    if isinstance(node, Integer):
        return int(node.value)
    elif isinstance(node, Float):
        return node.value
    elif isinstance(node, BinaryOperator):
        if node.op == '*':
            return interpret(node.left, env) * interpret(node.right, env)
        elif node.op == '/':
            return interpret(node.left, env) / interpret(node.right, env)
        elif node.op == '+':
            return interpret(node.left, env) + interpret(node.right, env)
        elif node.op == '-':
            return interpret(node.left, env) - interpret(node.right, env)
    elif isinstance(node, Comparison):
        if node.op == '>':
            return interpret(node.left, env) > interpret(node.right, env)
        elif node.op == '<':
            return interpret(node.left, env) < interpret(node.right, env)
        elif node.op == '==':
            return interpret(node.left, env) == interpret(node.right, env)
        elif node.op == '>=':
            return interpret(node.left, env) >= interpret(node.right, env)
        elif node.op == '<=':
            return interpret(node.left, env) <= interpret(node.right, env)
        elif node.op == '!=':
            return interpret(node.left, env) != interpret(node.right, env)
    elif isinstance(node, Print):
        print(interpret(node.value, env))
    elif isinstance(node, VariableAssignment):
        # if node.type.string_representation == the start of type checking
        env['variables'][str(node.name)] = interpret(node.value, env)
        return Unit()
    elif isinstance(node, ConstantAssignment):
        env['constants'][str(node.name)] = interpret(node.value, env)
        return Unit()
    elif isinstance(node, VariableDeclaration):
        env['variables'][str(node.name)] = "WABBITASSIGNMENTINWAITING"
        return Unit()
    elif isinstance(node, VariableReAssignment):
        if str(node.name) in env['variables'].keys():
            env['variables'][str(node.name)] = interpret(node.value, env)
        elif str(node.name) in env['constants'].keys():
            raise RuntimeError("Cannot reassign the value of a constant")
        else:
            raise RuntimeError(f"{node.name} not found for reassignment")
        return Unit()
    elif isinstance(node, Name):
        if node.name in env['variables'].keys():
            return env['variables'].get(node.name)
        elif node.name in env['constants'].keys():
            return env['constants'].get(str(node.name))
        else:
            raise RuntimeError(f"'{node.name}' not defined")
    elif isinstance(node, Negative):
        # gotta check if its  type that can be negative
        return interpret(node.value, env) * -1
    elif isinstance(node, Conditional):
        if interpret(node.if_condition, env):
            result = interpret(node.if_block, env)
            if isinstance(result, Break):
                return Break()
        else:
            if node.else_block:
                result = interpret(node.else_block, env)
                if isinstance(result, Break):
                    return Break()
    elif isinstance(node, WhileLoop):
        if interpret(node.while_condition, env):
            result = interpret(node.while_block, env)
            if not isinstance(result, Break):
                interpret(node, env)
            else:
                return Unit()
    elif isinstance(node, Block):
        for statement in node.statements:
            maybe_flow_interruptor = interpret(statement, env)
            if isinstance(maybe_flow_interruptor, Continue):
                return Unit()
            elif isinstance(maybe_flow_interruptor, Break):
                return Break()
        return Unit()
    elif isinstance(node, CompoundExpression):
        final_statement = None
        for statement in node.statements:
            final_statement = interpret(statement, env)
        return final_statement
    elif isinstance(node, Break):
        return Break()
    elif isinstance(node, Continue):
        return Continue()
    elif isinstance(node, WabbitType):
        return Unit()
    elif isinstance(node, WabbitBoolean):
        return node.value
    elif isinstance(node, Character):
        return str(node.value)
    else:
        raise RuntimeError(f"Can't interpret {node}")

変更されたテキスト

ファイルを開く

# Top level function that interprets an entire program. It creates the
# initial environment that's used for storing variables.

def interpret_program(model):
    # Make the initial environment (a dict).  The environment is
    # where you will create and store variables.
    env = {}
    for structure in model.statements:
        interpret(structure, env)

# Internal function to interpret a node in the environment.  You need
# to expand to cover all of the classes in the model.py file.

def interpret(node, env):
    # Expand to check for different node types
    if isinstance(node, Integer):
        return int(node.value)
    elif isinstance(node, Float):
        return node.value
    elif isinstance(node, BinaryOperator):
        if node.op == '*':
            return interpret(node.left, env) * interpret(node.right, env)
        elif node.op == '/':
            return interpret(node.left, env) / interpret(node.right, env)
        elif node.op == '+':
            return interpret(node.left, env) + interpret(node.right, env)
        elif node.op == '-':
            return interpret(node.left, env) - interpret(node.right, env)
    elif isinstance(node, Comparison):
        if node.op == '>':
            return interpret(node.left, env) > interpret(node.right, env)
        elif node.op == '<':
            return interpret(node.left, env) < interpret(node.right, env)
        elif node.op == '==':
            return interpret(node.left, env) == interpret(node.right, env)
        elif node.op == '>=':
            return interpret(node.left, env) >= interpret(node.right, env)
        elif node.op == '<=':
            return interpret(node.left, env) <= interpret(node.right, env)
        elif node.op == '!=':
            return interpret(node.left, env) != interpret(node.right, env)
    elif isinstance(node, Print):
        print(interpret(node.value, env))
    elif isinstance(node, VariableAssignment):
        env[str(node.name)] = {"value": interpret(node.value, env), "mutable": True}
        return Unit()
    elif isinstance(node, ConstantAssignment):
        env[str(node.name)] = {"value": interpret(node.value, env), "mutable": False}
        return Unit()
    elif isinstance(node, VariableDeclaration):
        env[str(node.name)] = {"value": None, "mutable": True}
        return Unit()
    elif isinstance(node, VariableReAssignment):
        if str(node.name) in env.keys():
            if not env[str(node.name)]['mutable']:
               raise RuntimeError("Cannot reassign the value of a constant")
            else:
                env[str(node.name)] = interpret(node.value, env)
        else:
            raise RuntimeError(f"{node.name} not found for reassignment")
        return Unit()
    elif isinstance(node, Name):
        if node.name in env.keys():
            return env.get(node.name).get('value')
        else:
            raise RuntimeError(f"'{node.name}' not defined")
    elif isinstance(node, Negative):
        # gotta check if its  type that can be negative
        return interpret(node.value, env) * -1
    elif isinstance(node, Conditional):
        if interpret(node.if_condition, env):
            result = interpret(node.if_block, env)
            if isinstance(result, Break):
                return Break()
        else:
            if node.else_block:
                result = interpret(node.else_block, env)
                if isinstance(result, Break):
                    return Break()
    elif isinstance(node, WhileLoop):
        if interpret(node.while_condition, env):
            result = interpret(node.while_block, env)
            if not isinstance(result, Break):
                interpret(node, env)
            else:
                return Unit()
    elif isinstance(node, Block):
        for statement in node.statements:
            maybe_flow_interruptor = interpret(statement, env)
            if isinstance(maybe_flow_interruptor, Continue):
                return Unit()
            elif isinstance(maybe_flow_interruptor, Break):
                return Break()
        return Unit()
    elif isinstance(node, CompoundExpression):
        final_statement = None
        for statement in node.statements:
            final_statement = interpret(statement, env)
        return final_statement
    elif isinstance(node, Break):
        return Break()
    elif isinstance(node, Continue):
        return Continue()
    elif isinstance(node, WabbitType):
        return Unit()
    elif isinstance(node, WabbitBoolean):
        return node.value
    elif isinstance(node, Character):
        return str(node.value)
    else:
        raise RuntimeError(f"Can't interpret {node}")