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The IRTermClassKind type classifies an IRTerm as either a statement or an expression. Not all terms carry a class kind: structural terms (BLOCK, INSN, PHI), type-related terms (TYPE, STRUCT_FIELD, FUNC_ARG, ENUM_VARIANT, UNION_VARIANT), LOCATION terms, and unwrapped VAR/VAL operands return nil for class_kind.
  • Statements (STMT) are IR operations that perform an action but do not produce a value: assignments, stores, branches, calls, and returns.
  • Expressions (EXPR) are IR operations that compute and produce a value: variables, constants, loads, arithmetic, bitwise operations, and comparisons.

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Fields

FieldDescriptionType
STMTStatement classIRTermClassKind
EXPRExpression classIRTermClassKind

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Example

for _, insn in ipairs(block.insns) do
  for _, stmt in ipairs(insn.stmts) do
    if stmt.class_kind == IRTermClassKind.STMT then
      -- Process statements (assignments, stores, calls, etc.)
    end
  end
end