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* EnumGenerator - ADR-017 Enum Declaration Generation
*
* Generates C typedef enum declarations from C-Next enum syntax.
*
* Example:
* enum State { IDLE, RUNNING, ERROR <- 255 }
* ->
* typedef enum {
* State_IDLE = 0,
* State_RUNNING = 1,
* State_ERROR = 255
* } State;
*/
import invariant from "../../../../../utils/invariant";
import IGeneratorInput from "../IGeneratorInput";
import IGeneratorState from "../IGeneratorState";
import IGeneratorOutput from "../IGeneratorOutput";
import IOrchestrator from "../IOrchestrator";
import TGeneratorFn from "../TGeneratorFn";
import QualifiedCName from "../../../../../utils/QualifiedCName";
import QualifiedNameGenerator from "../../../../../utils/QualifiedNameGenerator";
/**
* Generate a C typedef enum from a C-Next enum declaration.
*
* ADR-017: Enums are strongly-typed with explicit integer backing.
* Members are prefixed with the enum name to avoid C namespace collisions.
*
* #1445 box 3: takes the declared NAME, not the declaration node. The node was
* read once, for `.IDENTIFIER().getText()`; the members and their values come
* from `input.symbols.enumMembers`, which 1.3 Declare filled. Rendering an
* enum never needed the tree -- it needed a name to look the enum up by.
*/
const generateEnum: TGeneratorFn<string> = (
name: string,
input: IGeneratorInput,
state: IGeneratorState,
_orchestrator: IOrchestrator,
): IGeneratorOutput => {
// ADR-016: Apply scope prefix if inside a scope
const fullName = QualifiedNameGenerator.forMember(
state.currentScopePath,
name,
);
const lines: string[] = [];
lines.push(`typedef enum {`);
// Look up enum members from symbols (collected by SymbolCollector)
const members = input.symbols?.enumMembers.get(fullName);
invariant(
members,
`every enum declaration codegen visits was collected by the resolver, so its qualified name is in enumMembers (missing '${fullName}')`,
);
const memberEntries = Array.from(members.entries());
for (let i = 0; i < memberEntries.length; i++) {
const [memberName, value] = memberEntries[i];
// Prefix member names to avoid C namespace collisions
const fullMemberName = QualifiedCName.fromParts([fullName, memberName]);
const comma = i < memberEntries.length - 1 ? "," : "";
lines.push(` ${fullMemberName} = ${value}${comma}`);
}
lines.push(`} ${fullName};`, "");
// No side effects needed for enum generation
return {
code: lines.join("\n"),
effects: [],
};
};
export default generateEnum;
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