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23 lines
1.1 KiB
23 lines
1.1 KiB
4 years ago
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---
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title: "Impurity"
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description: "Detects functions with potential side-effects. Same as \"purity\", but implemented on top of Pulse."
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---
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Detects functions with potential side-effects. Same as "purity", but implemented on top of Pulse.
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Activate with `--impurity`.
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Supported languages:
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- C/C++/ObjC: Experimental
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- Java: Experimental
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- C#/.Net: Experimental
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This is an experimental inter-procedural analysis that detects impure functions. It is meant to be an improvement over the [purity](/docs/checker-purity) analysis with a negation on the issue types. For each function, impurity analysis keeps track of not only the impurity of the function but also some additional information such as which parameters/globals the function modifies. It models functions with no summary/model as impure. The analysis relies on [Pulse](/docs/checker-pulse) summaries to determine impurity.
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## List of Issue Types
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The following issue types are reported by this checker:
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- [IMPURE_FUNCTION](/docs/all-issue-types#impure_function)
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- [MODIFIES_IMMUTABLE](/docs/all-issue-types#modifies_immutable)
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