RuSTy
RuSTy is a structured text (ST) compiler written in Rust and based on the LLVM compiler backend. We use the logos crate library to perform lexical analysis before the custom parser runs. RuSTy puts out static or shared objects as well as LLVM IR or bitcode by the flip of a command line flag. We are aiming towards an open-source industry-grade ST compiler supporting at least the features in 2nd edition IEC 61131 standard.
You might also want to refer to the API documentation.
Supported Language Concepts
POUs
- ✔ Program
- ✔ Function
- ✔ FunctionBlock
- ✔ Action
Datatypes
- ✔ IEC 61131-3 numeric types
- ✔ Strings
- ✔ Wide Strings
- ✔ Struct types
- ✔ Enum types
- ✔ Array data types
- ✔ Alias types
- ✔ Sub-ranges types
- ✔ Date and Time types
- ✔ Sized String types
- ✔ Sized Wide String types
- ✔ Initial values
Declarations
- ✔ VAR
- ✔ VAR_INPUT
- ✔ VAR_INPUT {ref}
- ✔ VAR_OUTPUT
- ✔ VAR_IN_OUT
Statements
- ✔ Assignments
- ✔ Call statements
- ✔ Implicit call arguments
- ✔ Explicit call arguments
- ✔ EXIT, CONTINUE statements
Control Structures
- ✔ IF Statement
- ✔ CASE Statement
- ✔ FOR Loops
- ✔ WHILE Loops
- ✔ REPEAT Loops
- ✔ RETURN statement
Expressions
- ✔ Arithmetic Operators
- ✔ Relational Operators
- ✔ Logical Operators
- ✔ Bitwise Operators