Function stack at time s

each element in the stack contains the context of the running program at a particular scope

Format:

stack at time s

Input:

Output:

Conditional properties that reference this function:

• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab k = s
  • k > j

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab k = s
  • k < j
  • value at (j - 1) in map (Control Map at time t) = pair ("while", while_line)

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • number of lines = i - 1
  • value at (j - 1) in map (Control Map at time t) = pair ("while", while_line)

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • number of lines = i - 1
  • value at (j - 1) in map (Control Map at time t) = pair ("if", if_value)

  then stack at time (t + 1) = stack at time t

  (link)
• if "break" state at t = "breaking", then stack at time (t + 1) = stack at time t (link)
• if "continue" state at t = "continuing", then stack at time (t + 1) = stack at time t (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = function call with name: name and arguments: args
  • expression state at time t = "end_expr"

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = function call with name: name and arguments: args

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = c
  • c is constant

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = x
  • x is a variable

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = x = c
  • c is constant

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = x = c
  • c is a variable

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (function call with name: name and arguments: args)
  • expression state at time t = "not_expr"

  then stack at time (t + 1) = stack at time t

  (link)
• if expression state at time t = "begin_expr", then stack at time (t + 1) = stack at time t (link)
• if expression state at time t = "iterate_args", then stack at time (t + 1) = stack at time t (link)
• if expression state at time t = "call_function_begin", then stack at time (t + 1) = stack at time t (link)
• if the following are true:
  • expression state at time t = "call_build_args"
  • Parameters List at time t = [ var, frest ]
  • Argument Values at time t = [ value, vrest ]

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • expression state at time t = "call_build_args"
  • Parameters List at time t = [ ]

  then stack at time (t + 1) = [ program context with variables: (Variables Map at time t) and expression state: (expression state with parent stack: (parent stack at time t) arguments: (arguments stack at time t) values: (Value Stack at time t) line: (the line at time t) tab: (the tab at time t)) and control map: (Control Map at time t), stack at time t ]

  (link)
• if expression state at time t = "call_returned", then stack at time (t + 1) = stack at time t (link)
• if expression state at time t = "return", then stack at time (t + 1) = stack at time t (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (function call with name: name and arguments: args)
  • expression state at time t = "end_expr"

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = if test:

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = else:

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab k = s
  • k < j
  • value at (j - 1) in map (Control Map at time t) = pair ("if", if_value)

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = "while" statement with condition (function call with name: name and arguments: args)

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = break

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = continue

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = function definition where name: name and parameters: params

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • expression state at time t = "not_expr"

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • stack at time t = [ program context with variables: varis and expression state: (expression state with parent stack: parent_stack arguments: arg_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]
  • expression state at time t = "end_expr"

  then Variables Map at time (t + 1) = varis

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • stack at time t = [ program context with variables: varis and expression state: (expression state with parent stack: parent_stack arguments: arg_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]
  • expression state at time t = "end_expr"

  then the line at time (t + 1) = line

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • stack at time t = [ program context with variables: varis and expression state: (expression state with parent stack: parent_stack arguments: arg_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]
  • expression state at time t = "end_expr"

  then the tab at time (t + 1) = tab

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • stack at time t = [ program context with variables: varis and expression state: (expression state with parent stack: parent_stack arguments: arg_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]
  • expression state at time t = "end_expr"

  then expression state at time (t + 1) = "call_returned"

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • stack at time t = [ program context with variables: varis and expression state: (expression state with parent stack: parent_stack arguments: arg_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]
  • expression state at time t = "end_expr"

  then parent stack at time (t + 1) = parent_stack

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • stack at time t = [ program context with variables: varis and expression state: (expression state with parent stack: parent_stack arguments: arg_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]
  • expression state at time t = "end_expr"

  then Control Map at time (t + 1) = control_map

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • stack at time t = [ program context with variables: varis and expression state: (expression state with parent stack: parent_stack arguments: arg_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]
  • expression state at time t = "end_expr"

  then stack at time (t + 1) = rest

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • stack at time t = [ program context with variables: varis and expression state: (expression state with parent stack: parent_stack arguments: arg_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]
  • expression state at time t = "end_expr"

  then Value Stack at time (t + 1) = value_stack

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • stack at time t = [ program context with variables: varis and expression state: (expression state with parent stack: parent_stack arguments: arg_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]
  • expression state at time t = "end_expr"

  then arguments stack at time (t + 1) = arg_stack

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • stack at time t = [ program context with variables: varis and expression state: (expression state with parent stack: parent_stack arguments: arg_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]
  • expression state at time t = "end_expr"

  then Return Value at time (t + 1) = Return Value at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = Python list elements

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python list elements)
  • expression state at time t = "not_expr"

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python list elements)
  • expression state at time t = "end_expr"

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj_name.method_name(args)
  • expression state at time t = "not_expr"

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target target and expression (obj_name.method_name(args))
  • expression state at time t = "not_expr"

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj."append"(el)

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python dictionary elements)
  • expression state at time t = "not_expr"

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python dictionary elements)
  • expression state at time t = "end_expr"

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = a class named name with bases: bases

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab k = s
  • k < j
  • value at (j - 1) in map (Control Map at time t) = pair ("class", class_name)

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = a method named method_name with parameters params

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.mn(args)
  • expression state at time t = "end_expr"

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj_name.method_name(args))
  • expression state at time t = "end_expr"

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python constructor with name: name and arguments: args)
  • expression state at time t = "not_expr"

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • expression state at time t = "call_build_args"
  • the expression at time t = Python constructor with name: class_name and arguments: args
  • Function Variables Map at time t = [ ]
  • Parameters List at time t = [ self, p_rest ]

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python constructor with name: class_name and arguments: args)
  • expression state at time t = "end_expr"

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj.attr)
  • expression state at time t = "not_expr"

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj.attr)
  • expression state at time t = "end_expr"

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.key = value

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = x.y = z
  • expression state at time t = "end_expr"

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab k = s
  • k < j
  • value at (j - 1) in map (Control Map at time t) = pair ("method", mname)
  • stack at time t = [ program context with variables: varis and expression state: (expression state with parent stack: parent_stack arguments: arg_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]

  then Variables Map at time (t + 1) = varis

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab k = s
  • k < j
  • value at (j - 1) in map (Control Map at time t) = pair ("method", mname)
  • stack at time t = [ program context with variables: varis and expression state: (expression state with parent stack: parent_stack arguments: arg_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]

  then the line at time (t + 1) = line

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab k = s
  • k < j
  • value at (j - 1) in map (Control Map at time t) = pair ("method", mname)
  • stack at time t = [ program context with variables: varis and expression state: (expression state with parent stack: parent_stack arguments: arg_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]

  then the tab at time (t + 1) = tab

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab k = s
  • k < j
  • value at (j - 1) in map (Control Map at time t) = pair ("method", mname)
  • stack at time t = [ program context with variables: varis and expression state: (expression state with parent stack: parent_stack arguments: arg_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]

  then expression state at time (t + 1) = "call_returned"

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab k = s
  • k < j
  • value at (j - 1) in map (Control Map at time t) = pair ("method", mname)
  • stack at time t = [ program context with variables: varis and expression state: (expression state with parent stack: parent_stack arguments: arg_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]

  then parent stack at time (t + 1) = parent_stack

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab k = s
  • k < j
  • value at (j - 1) in map (Control Map at time t) = pair ("method", mname)
  • stack at time t = [ program context with variables: varis and expression state: (expression state with parent stack: parent_stack arguments: arg_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]

  then stack at time (t + 1) = rest

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab k = s
  • k < j
  • value at (j - 1) in map (Control Map at time t) = pair ("method", mname)
  • stack at time t = [ program context with variables: varis and expression state: (expression state with parent stack: parent_stack arguments: arg_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]

  then Value Stack at time (t + 1) = value_stack

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab k = s
  • k < j
  • value at (j - 1) in map (Control Map at time t) = pair ("method", mname)
  • stack at time t = [ program context with variables: varis and expression state: (expression state with parent stack: parent_stack arguments: arg_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]

  then arguments stack at time (t + 1) = arg_stack

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab k = s
  • k < j
  • value at (j - 1) in map (Control Map at time t) = pair ("method", mname)
  • stack at time t = [ program context with variables: varis and expression state: (expression state with parent stack: parent_stack arguments: arg_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]

  then Control Map at time (t + 1) = control_map

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = for target in iterable:
  • iterable is a variable

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = for target in iterable:
  • expression state at time t = "end_expr"

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = for target in iterable_ex:
  • value at j in map (Control Map at time t) = trio ("for", i, [ elem, rest ])

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = for target in iterable_ex:
  • value at j in map (Control Map at time t) = trio ("for", i, [ ])

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab k = s
  • k < j
  • value at (j - 1) in map (Control Map at time t) = trio ("for", for_line, iterable)

  then stack at time (t + 1) = stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • number of lines = i - 1
  • value at (j - 1) in map (Control Map at time t) = trio ("for", for_line, iterable)

  then stack at time (t + 1) = stack at time t

  (link)

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