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/**

* @name Assignment to constant

* @description Assigning to a variable that is declared 'const' has either no effect or leads to a

* runtime error, depending on the platform.

* @kind problem

* @problem.severity error

* @id js/assignment-to-constant

* @tags quality

* reliability

* correctness

* @precision very-high

*/

import javascript

import semmle.javascript.RestrictedLocations

from DeclStmt cds, VariableDeclarator decl, VarDef def, Variable v

where

(cds instanceof ConstDeclStmt or cds instanceof UsingDeclStmt) and

decl = cds.getADecl() and

def.getAVariable() = v and

decl.getBindingPattern().getAVariable() = v and

def != decl and

def.(ExprOrStmt).getTopLevel() = decl.getTopLevel()

select def.(FirstLineOf), "Assignment to variable " + v.getName() + ", which is $@ constant.", cds,

"declared"