class_docstr: This analyse extract positive subscripts from code.
  
  It is flow sensitive and aliasing is not taken into account as integer
  doesn't create aliasing in Python.
  
  >>> import gast as ast
  >>> from pythran import passmanager, backend
  >>> node = ast.parse('''
  ... def foo(a):
  ...     for i in builtins.range(1, 10):
  ...         c = i // 2''')
  >>> pm = passmanager.PassManager("test")
  >>> res = pm.gather(RangeValuesSimple, node)
  >>> res['c'], res['i']
  (Interval(low=0, high=5), Interval(low=1, high=10))
class_docstr_tok: ["This","analyse","extract","positive","subscripts","from","code",".","It","is","flow","sensitive","and","aliasing","is","not","taken","into","account","as","integer","does","n't","create","aliasing","in","Python",".",">",">",">","import","gast","as","ast",">",">",">","from","pythran","import","passmanager",",","backend",">",">",">","node","=","ast.parse","(","``","'","...","def","foo","(","a",")",":","...","for","i","in","builtins.range","(","1",",","10",")",":","...","c","=","i","\/\/","2","''","'",")",">",">",">","pm","=","passmanager.PassManager","(","``","test","''",")",">",">",">","res","=","pm.gather","(","RangeValuesSimple",",","node",")",">",">",">","res","[","'","c","'","]",",","res","[","'","i","'","]","(","Interval","(","low=0",",","high=5",")",",","Interval","(","low=1",",","high=10",")",")"]
docstr: Handle iterate variable across branches
  
  >>> import gast as ast
  >>> from pythran import passmanager, backend
  >>> pm = passmanager.PassManager("test")
  
  >>> node = ast.parse('''
  ... def foo(a):
  ...     if a > 1: b = 1
  ...     else: b = 3''')
  
  >>> res = pm.gather(RangeValuesSimple, node)
  >>> res['b']
  Interval(low=1, high=3)
  
  >>> node = ast.parse('''
  ... def foo(a):
  ...     if a > 1: b = a
  ...     else: b = 3''')
  >>> res = pm.gather(RangeValuesSimple, node)
  >>> res['b']
  Interval(low=2, high=inf)
  
  >>> node = ast.parse('''
  ... def foo(a):
  ...     if 0 < a < 4: b = a
  ...     else: b = 3''')
  >>> res = pm.gather(RangeValuesSimple, node)
  >>> res['b']
  Interval(low=1, high=3)
  
  >>> node = ast.parse('''
  ... def foo(a):
  ...     if (0 < a) and (a < 4): b = a
  ...     else: b = 3''')
  >>> res = pm.gather(RangeValuesSimple, node)
  >>> res['b']
  Interval(low=1, high=3)
  
  >>> node = ast.parse('''
  ... def foo(a):
  ...     if (a == 1) or (a == 2): b = a
  ...     else: b = 3''')
  >>> res = pm.gather(RangeValuesSimple, node)
  >>> res['b']
  Interval(low=1, high=3)
docstr_tok: ["Handle","iterate","variable","across","branches",">",">",">","import","gast","as","ast",">",">",">","from","pythran","import","passmanager",",","backend",">",">",">","pm","=","passmanager.PassManager","(","``","test","''",")",">",">",">","node","=","ast.parse","(","``","'","...","def","foo","(","a",")",":","...","if","a",">","1",":","b","=","1","...","else",":","b","=","3","''","'",")",">",">",">","res","=","pm.gather","(","RangeValuesSimple",",","node",")",">",">",">","res","[","'","b","'","]","Interval","(","low=1",",","high=3",")",">",">",">","node","=","ast.parse","(","``","'","...","def","foo","(","a",")",":","...","if","a",">","1",":","b","=","a","...","else",":","b","=","3","''","'",")",">",">",">","res","=","pm.gather","(","RangeValuesSimple",",","node",")",">",">",">","res","[","'","b","'","]","Interval","(","low=2",",","high=inf",")",">",">",">","node","=","ast.parse","(","``","'","...","def","foo","(","a",")",":","...","if","0","<","a","<","4",":","b","=","a","...","else",":","b","=","3","''","'",")",">",">",">","res","=","pm.gather","(","RangeValuesSimple",",","node",")",">",">",">","res","[","'","b","'","]","Interval","(","low=1",",","high=3",")",">",">",">","node","=","ast.parse","(","``","'","...","def","foo","(","a",")",":","...","if","(","0","<","a",")","and","(","a","<","4",")",":","b","=","a","...","else",":","b","=","3","''","'",")",">",">",">","res","=","pm.gather","(","RangeValuesSimple",",","node",")",">",">",">","res","[","'","b","'","]","Interval","(","low=1",",","high=3",")",">",">",">","node","=","ast.parse","(","``","'","...","def","foo","(","a",")",":","...","if","(","a","==","1",")","or","(","a","==","2",")",":","b","=","a","...","else",":","b","=","3","''","'",")",">",">",">","res","=","pm.gather","(","RangeValuesSimple",",","node",")",">",">",">","res","[","'","b","'","]","Interval","(","low=1",",","high=3",")"]
code: def visit_If(self, node):
      """Handle iterate variable across branches
  
      >>> import gast as ast
      >>> from pythran import passmanager, backend
      >>> pm = passmanager.PassManager("test")
  
      >>> node = ast.parse('''
      ... def foo(a):
      ...     if a > 1: b = 1
      ...     else: b = 3''')
  
      >>> res = pm.gather(RangeValuesSimple, node)
      >>> res['b']
      Interval(low=1, high=3)
  
      >>> node = ast.parse('''
      ... def foo(a):
      ...     if a > 1: b = a
      ...     else: b = 3''')
      >>> res = pm.gather(RangeValuesSimple, node)
      >>> res['b']
      Interval(low=2, high=inf)
  
      >>> node = ast.parse('''
      ... def foo(a):
      ...     if 0 < a < 4: b = a
      ...     else: b = 3''')
      >>> res = pm.gather(RangeValuesSimple, node)
      >>> res['b']
      Interval(low=1, high=3)
  
      >>> node = ast.parse('''
      ... def foo(a):
      ...     if (0 < a) and (a < 4): b = a
      ...     else: b = 3''')
      >>> res = pm.gather(RangeValuesSimple, node)
      >>> res['b']
      Interval(low=1, high=3)
  
      >>> node = ast.parse('''
      ... def foo(a):
      ...     if (a == 1) or (a == 2): b = a
      ...     else: b = 3''')
      >>> res = pm.gather(RangeValuesSimple, node)
      >>> res['b']
      Interval(low=1, high=3)
      """
      self.visit(node.test)
      old_range = self.result
  
      self.result = old_range.copy()
      bound_range(self.result, self.aliases, node.test)
  
      for stmt in node.body:
          self.visit(stmt)
      body_range = self.result
  
      self.result = old_range.copy()
      for stmt in node.orelse:
          self.visit(stmt)
      orelse_range = self.result
  
      self.result = body_range
      self.unionify(orelse_range)
  
imports: import gast
  from collections import defaultdict
  from functools import reduce
  from pythran.analyses import Aliases, CFG
  from pythran.intrinsic import Intrinsic
  from pythran.passmanager import ModuleAnalysis
  from pythran.interval import Interval, IntervalTuple, UNKNOWN_RANGE
  from pythran.tables import MODULES, attributes
label_desc: Use image node_id 13 for calling the RangeValuesSimple obj's underlying member method code with example usage: obj.visit_If(node) without return types