def compile_line(program, expr):
iterator = Peekable(new_split_iter(expr))
if peek(iterator) == "deffn":
"""
name, parms, body = define_func(iterator)
local_variables = VarTree()
code_line = len(program.code)
program.functions.assign(name, (parms, body, code_line, local_variables))
body.comp( local_variables, program )
"""
pass
else:
if program.first_stmt == -1: # if 'main' not yet assigned
program.first_stmt = len(program.code) # start executing here
to_expr_tree(expr).comp(program.variables, program)
program.code.append(Print(program.code[-1].get_temp()))
def evaluate(expr):
itera = Peekable(new_split_iter(expr))
if peek(itera) == "deffn":
name, p, body = define_func(itera)
functions.assign(name, (p, body))
else:
print(expr,':',to_expr_tree(expr).evaluate(variables, functions))
def evaluate(expr):
"""Define a new function, or evaluate an expression
If the first word in the line "deffn", it should appear as
deffn <function name> ( <parameters> ) = <function body>
a VarTree will associate the function name with
a list of parameters (at least one, maybe more)
and a tree representing the function body
otherwise the input line is evaluated in an expression tree
"""
iterator = Peekable(new_split_iter(expr))
if peek(iterator) == "deffn":
name, parms, body = define_func(iterator)
functions.assign(name, (parms, body))
else:
print(expr, ':', to_expr_tree(expr).evaluate(variables, functions))
def compile_line(program, expr):
"""Define a new function, or evaluate an expression
If the first word in the line "deffn", it should appear as
deffn <function name> ( <parameters> ) = <function body>
otherwise the input line is evaluated in an expression tree
"""
iterator = Peekable(new_split_iter(expr))
if peek(iterator) == "deffn":
name, body = define_func(iterator)
local_variables = BinaryTree()
program.functions.assign(name, (body, local_variables))
compile_tree(body, local_variables, program.functions,
program.code) # program code - output
else:
if program.first_stmt == -1: # if 'main' not yet assigned
program.first_stmt = len(program.code) # start executing here
compile_tree(to_expr_tree(expr), program.variables, program.functions,
program.code)
program.code.append(Print(program.code[-1].get_temp()))
def test(expr):
tree = to_expr_tree(expr)
print(expr, ':', tree.evaluate(V))
if '?' not in expr:
print("from postfix:", eval_postfix(tree.postfix()))