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Bug #7251

closed

A warning or error is needed when a value is truncated

Added by Andrei Tatarnikov over 8 years ago. Updated almost 5 years ago.

Status:
Rejected
Priority:
High
Assignee:
Artem Kotsynyak
Category:
nML Translator
Target version:
2.5
Start date:
05/25/2016
Due date:
% Done:

0%

Estimated time:
Detected in build:
svn
Platform:
Published in build:

Description

Constant expressions are cast to nML types depending of the context. For example, in expressions of kind "VARIABLE operator CONSTANT", CONSTANT is cast to the type of VARIABLE. If CONSTANT is larger than can be represented by the type, its higher bits are truncated. This can lead to unexpected results. For this reason, in such situations a warning or an error must be generated.

Example:

In "x + 32" where x has type card(5), 32 gets truncated to 0.
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