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Change Binder variable type if value is assigned to null variable, or null is assigned to a variable type

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Deukhoofd 2018-11-14 13:58:12 +01:00
parent 3efa6a6359
commit 82e13a85e2
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GPG Key ID: B4C087AC81641654
2 changed files with 12 additions and 4 deletions
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14
Upsilon/Binder/Binder.cs
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@ -159,10 +159,18 @@ namespace Upsilon.Binder
} }
else else
{ {
if (boundExpression.Type != variable.Type) // don't allow assigning different typed variables to a variable, unless either of them is nil, allow assigning nil to all variables
if (boundExpression.Type != variable.Type && (variable.Type != Type.Nil || boundExpression.Type == Type.Nil))
{ {
_diagnostics.LogCannotConvert(boundExpression.Type, variable.Type, e.Span); if (variable.Type == Type.Nil || boundExpression.Type == Type.Nil)
return new BoundExpressionStatement(boundExpression); {
variable.Type = boundExpression.Type;
}
else
{
_diagnostics.LogCannotConvert(boundExpression.Type, variable.Type, e.Span);
return new BoundExpressionStatement(boundExpression);
}
} }
} }

2
Upsilon/Binder/VariableSymbol.cs
View File

@ -10,7 +10,7 @@ namespace Upsilon.Binder
Name = name; Name = name;
} }
public Type Type { get; } public Type Type { get; set; }
public string Name { get; } public string Name { get; }
} }
} }