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* TypeUtils - Utilities for extracting and converting C-Next types.
*/
import * as Parser from "../../../parser/grammar/CNextParser";
import CNEXT_TO_C_TYPE_MAP from "../../../../../utils/constants/TypeMappings";
/**
* Common interface for type contexts that share the same type accessors.
* Both TypeContext and ArrayTypeContext have these methods.
*/
interface ITypeAccessors {
primitiveType(): Parser.PrimitiveTypeContext | null;
userType(): Parser.UserTypeContext | null;
stringType(): Parser.StringTypeContext | null;
scopedType(): Parser.ScopedTypeContext | null;
qualifiedType(): Parser.QualifiedTypeContext | null;
globalType(): Parser.GlobalTypeContext | null;
}
/**
* Resolve string type with optional capacity.
*/
function resolveStringType(stringCtx: Parser.StringTypeContext): string {
const intLiteral = stringCtx.INTEGER_LITERAL();
return intLiteral ? `string<${intLiteral.getText()}>` : "string";
}
/**
* Dispatch type resolution for contexts that share common type accessors.
* Handles scoped, qualified, global, primitive, string, and user types.
* Used by both bare type contexts and array element type contexts.
*
* @returns The resolved type name, or null if no matching type accessor found
*/
function dispatchTypeResolution(
accessors: ITypeAccessors,
scopeName?: string,
): string | null {
// Handle this.Type for scoped types (e.g., this.State -> Motor_State)
if (accessors.scopedType()) {
const typeName = accessors.scopedType()!.IDENTIFIER().getText();
return scopeName ? `${scopeName}_${typeName}` : typeName;
}
// Handle global.Type for global types inside scope
// global.ECategory -> ECategory (just the type name, no scope prefix)
if (accessors.globalType()) {
return accessors.globalType()!.IDENTIFIER().getText();
}
// Handle Scope.Type from outside scope (e.g., Motor.State -> Motor_State)
if (accessors.qualifiedType()) {
const identifiers = accessors.qualifiedType()!.IDENTIFIER();
return identifiers.map((id) => id.getText()).join("_");
}
// Handle user-defined types
if (accessors.userType()) {
return accessors.userType()!.getText();
}
// Handle primitive types
if (accessors.primitiveType()) {
return accessors.primitiveType()!.getText();
}
// Handle string types - preserve capacity for validation (Issue #139)
if (accessors.stringType()) {
return resolveStringType(accessors.stringType()!);
}
return null;
}
class TypeUtils {
/**
* Extract the type name from a type context.
* Handles scoped types (this.Type), qualified types (Scope.Type),
* and simple types.
*
* @param ctx The type context (may be null)
* @param scopeName Optional current scope for this.Type resolution
* @returns The resolved type name
*/
static getTypeName(
ctx: Parser.TypeContext | null,
scopeName?: string,
): string {
Iif (!ctx) return "void";
// Handle arrayType: Type[size] - extract the inner type without dimension
// The dimension is tracked separately in arrayDimensions
if (ctx.arrayType()) {
const result = dispatchTypeResolution(ctx.arrayType()!, scopeName);
Eif (result !== null) {
return result;
}
// Fallback for unrecognized array types - strip the dimension part
const text = ctx.arrayType()!.getText();
const bracketIdx = text.indexOf("[");
return bracketIdx > 0 ? text.substring(0, bracketIdx) : text;
}
// Non-array types - dispatch directly
const result = dispatchTypeResolution(ctx, scopeName);
if (result !== null) {
return result;
}
// Fallback
return ctx.getText();
}
/**
* Convert a C-Next type name to its C equivalent.
*
* @param typeName The C-Next type name
* @returns The C type name
*/
static cnextTypeToCType(typeName: string): string {
return CNEXT_TO_C_TYPE_MAP[typeName] ?? typeName;
}
}
export default TypeUtils;
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