PLC-lang/rusty

Method calls without parentheses should emit a warning/error

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#1,449 opened on Mar 28, 2025

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good first issuemedium-priorityvalidation

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Description

Is your feature request related to a problem? Please describe. Currently, trying to call a method without () will simply generate a GEP-instruction and have no further effect. The method is never called and assigning the return-value will attempt to write the pointer value from the GEP. So far, I haven't been able to force a segfault due to this, but when trying to generate IR llvm will abort with an error during verification.

Describe the solution you'd like We should at the very least warn the user that the statement will result in UB, I'm fine with emitting an error aswell.

Contributor guide

Research direction
Locate the parser logic for method calls and add a check for missing parentheses; emit a warning or error accordingly.
Tech stack
rust
Domain
backendcompilers
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Rust
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65