throw a type error when trying to write to a const variable

This makes them really const. The codegen needs some smaller changes
to ensure that writing to the variable when it's being defined is
allowed.

Change-Id: I781b4bc9c0e0397b9d00cad3daf758a062c17600
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/qml/compiler/qv4compilerscanfunctions.cpp b/src/qml/compiler/qv4compilerscanfunctions.cpp
index 8b8c385b84..9be55c6ad0 100644
--- a/src/qml/compiler/qv4compilerscanfunctions.cpp
+++ b/src/qml/compiler/qv4compilerscanfunctions.cpp
@@ -230,7 +230,7 @@ bool ScanFunctions::visit(ClassExpression *ast)
     _context->isStrict = true;
     _context->hasNestedFunctions = true;
     if (!ast->name.isEmpty())
-        _context->addLocalVar(ast->name.toString(), Context::VariableDeclaration, AST::VariableScope::Let);
+        _context->addLocalVar(ast->name.toString(), Context::VariableDefinition, AST::VariableScope::Const);
     return true;
 }
 
@@ -248,7 +248,7 @@ bool ScanFunctions::visit(ClassDeclaration *ast)
     _context->isStrict = true;
     _context->hasNestedFunctions = true;
     if (!ast->name.isEmpty())
-        _context->addLocalVar(ast->name.toString(), Context::VariableDeclaration, AST::VariableScope::Let);
+        _context->addLocalVar(ast->name.toString(), Context::VariableDefinition, AST::VariableScope::Const);
     return true;
 }