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* ScopeGenerator - ADR-016 Scope Declaration Generation
*
* Generates C code from C-Next scope declarations with visibility control.
* Scopes provide namespace prefixing and static/extern visibility.
*
* Example:
* scope Driver {
* private u32 counter;
* public fn init() -> void { counter <- 0; }
* }
* ->
* // Scope: Driver
* static uint32_t Driver_counter = 0;
* void Driver_init(void) { Driver_counter = 0; }
*/
import * as Parser from "../../../../logic/parser/grammar/CNextParser";
import IGeneratorInput from "../IGeneratorInput";
import IGeneratorState from "../IGeneratorState";
import IGeneratorOutput from "../IGeneratorOutput";
import IOrchestrator from "../IOrchestrator";
import TGeneratorFn from "../TGeneratorFn";
import generateScopedRegister from "./ScopedRegisterGenerator";
import BitmapCommentUtils from "./BitmapCommentUtils";
import ArrayDimensionUtils from "./ArrayDimensionUtils";
import QualifiedNameGenerator from "../../utils/QualifiedNameGenerator";
import type IScopeSymbol from "../../../../types/symbols/IScopeSymbol";
import CodeGenState from "../../../../state/CodeGenState";
import AdrProvenance from "../../../../state/AdrProvenance";
import SymbolRegistry from "../../../../state/SymbolRegistry";
import ScopeUtils from "../../../../../utils/ScopeUtils";
import QualifiedCName from "../../../../../utils/QualifiedCName";
import VariableModifierBuilder from "../../helpers/VariableModifierBuilder";
/**
* Generate initializer expression for a variable declaration.
* Issue #872: Sets expectedType for MISRA 7.2 U suffix on unsigned literals.
*/
function generateInitializer(
varDecl: Parser.VariableDeclarationContext,
isArray: boolean,
orchestrator: IOrchestrator,
): string {
if (varDecl.expression()) {
// Issue #872: Set expectedType for MISRA 7.2 U suffix compliance
// Issue #992: withDeclarationInit suppresses compound literals at file scope (GCC 9-12 compat)
const typeName = orchestrator.generateType(varDecl.type());
return CodeGenState.withExpectedType(typeName, () =>
CodeGenState.withDeclarationInit(
() => ` = ${orchestrator.generateExpression(varDecl.expression()!)}`,
),
);
}
// ADR-015: Zero initialization for uninitialized scope variables
return ` = ${orchestrator.getZeroInitializer(varDecl.type(), isArray)}`;
}
/**
* Extract scoped name from a declaration node.
* Returns both the local name and the fully qualified scoped name.
*/
function getScopedName(
node: { IDENTIFIER(): { getText(): string } },
declaringScope: IScopeSymbol | null,
): { name: string; fullName: string } {
const name = node.IDENTIFIER().getText();
return {
name,
fullName: QualifiedNameGenerator.forMember(declaringScope, name),
};
}
/**
* Validate and resolve constructor arguments, ensuring each is const.
* Returns array of scope-prefixed argument names.
*/
function resolveConstructorArgs(
argIdentifiers: { getText(): string }[],
declaringScope: IScopeSymbol | null,
line: number,
orchestrator: IOrchestrator,
): string[] {
const resolvedArgs: string[] = [];
for (const argNode of argIdentifiers) {
const argName = argNode.getText();
// Arguments must be resolved with scope prefix
const scopedArgName = QualifiedNameGenerator.forMember(
declaringScope,
argName,
);
// Check if it's const using orchestrator
if (!orchestrator.isConstValue(scopedArgName)) {
throw new Error(
`Error at line ${line}: Constructor argument '${argName}' must be const. ` +
`C++ constructors in C-Next only accept const variables.`,
);
}
resolvedArgs.push(scopedArgName);
}
return resolvedArgs;
}
/**
* Generate a scope variable declaration.
* Returns the declaration string, or null if the variable should be skipped.
*/
function generateScopeVariable(
varDecl: Parser.VariableDeclarationContext,
declaringScope: IScopeSymbol | null,
isPrivate: boolean,
orchestrator: IOrchestrator,
): string | null {
const varName = varDecl.IDENTIFIER().getText();
// Issue #375: Check for constructor syntax
const constructorArgList = varDecl.constructorArgumentList();
if (constructorArgList) {
return generateConstructorVariable(
varDecl,
varName,
declaringScope,
isPrivate,
constructorArgList,
orchestrator,
);
}
// Issue #282: Check if this is a const variable - const values should be inlined
const isConst = varDecl.constModifier() !== null;
// Issue #500: Check if array before skipping - arrays must be emitted
// Check both C-style arrayDimension and C-Next style arrayType
// Use optional chaining for mock compatibility in tests
const arrayDims = varDecl.arrayDimension();
const arrayTypeCtx = varDecl.type().arrayType?.() ?? null;
const isArray = arrayDims.length > 0 || arrayTypeCtx !== null;
// Issue #282: Private const variables should be inlined, not emitted at file scope
// Issue #500: EXCEPT arrays - arrays must be emitted as static const
// The inlining happens in CodeGenerator when resolving this.CONST_NAME
if (isPrivate && isConst && !isArray) {
return null;
}
return generateRegularVariable(
varDecl,
varName,
declaringScope,
isPrivate,
orchestrator,
);
}
/**
* Generate a constructor-style variable declaration.
*/
function generateConstructorVariable(
varDecl: Parser.VariableDeclarationContext,
varName: string,
declaringScope: IScopeSymbol | null,
isPrivate: boolean,
constructorArgList: Parser.ConstructorArgumentListContext,
orchestrator: IOrchestrator,
): string {
// ADR-016: All scope variables are emitted at file scope
const type = orchestrator.generateType(varDecl.type());
const fullName = QualifiedNameGenerator.forMember(declaringScope, varName);
const prefix = isPrivate ? "static " : "";
// Validate and resolve constructor arguments
const argIdentifiers = constructorArgList.IDENTIFIER();
const line = varDecl.start?.line ?? 0;
const resolvedArgs = resolveConstructorArgs(
argIdentifiers,
declaringScope,
line,
orchestrator,
);
return `${prefix}${type} ${fullName}(${resolvedArgs.join(", ")});`;
}
/**
* Generate a regular (non-constructor) variable declaration.
*/
function generateRegularVariable(
varDecl: Parser.VariableDeclarationContext,
varName: string,
declaringScope: IScopeSymbol | null,
isPrivate: boolean,
orchestrator: IOrchestrator,
): string {
// Derive array and const info from varDecl
const isConst = varDecl.constModifier() !== null;
const arrayDims = varDecl.arrayDimension();
const arrayTypeCtx = varDecl.type().arrayType?.() ?? null;
const isArray = arrayDims.length > 0 || arrayTypeCtx !== null;
// ADR-016: All scope variables are emitted at file scope (static-like persistence)
let type = orchestrator.generateType(varDecl.type());
// Issue #1200: a callback-typed scope member renders as its function-pointer
// typedef. Without this the raw function name was emitted as the type, which
// collides with the function of the same name.
const callbackTypedef = orchestrator.getCallbackTypedefName(type);
if (callbackTypedef !== null) {
type = callbackTypedef;
}
const fullName = QualifiedNameGenerator.forMember(declaringScope, varName);
// Issue #948: Check if this is an opaque (forward-declared) struct type
// Issue #958: Also check for external typedef struct types (complete definitions)
// Both opaque and external typedef struct types must be declared as pointers
const isOpaque = orchestrator.isOpaqueType(type);
const isExternalStruct = orchestrator.isTypedefStructType(type);
if (isOpaque || isExternalStruct) {
type = `${type}*`;
// Mark as "opaque" scope variable so CallExprGenerator knows this is already
// a pointer and doesn't add '&' when passing to functions. The name is historical
// but the tracking applies to any scope variable declared as a pointer type.
orchestrator.markOpaqueScopeVariable(fullName);
}
// Issue #998: Use VariableModifierBuilder for consistent modifier handling
// This handles const, atomic, volatile, and validates mutual exclusion
// Scope variables are always at file scope (not in function body), no initializer for modifier purposes
const modifiers = VariableModifierBuilder.build(
varDecl,
false, // inFunctionBody - scope vars are file scope
false, // hasInitializer - doesn't affect volatile/atomic handling
false, // cppMode - doesn't affect volatile/atomic handling
);
// For scope variables: static for private, no modifier for public
// Then add volatile (from atomic or volatile keyword), then const
const staticPrefix = isPrivate ? "static " : "";
const volatilePrefix = modifiers.atomic || modifiers.volatile;
const constPrefix = isConst ? "const " : "";
// Build declaration with all dimensions
let decl = `${staticPrefix}${volatilePrefix}${constPrefix}${type} ${fullName}`;
decl += ArrayDimensionUtils.generateArrayTypeDimension(
arrayTypeCtx,
orchestrator,
);
if (arrayDims.length > 0) {
// C-style or additional dimensions
decl += orchestrator.generateArrayDimensions(arrayDims);
}
// ADR-045: Add string capacity dimension for string arrays
decl += ArrayDimensionUtils.generateStringCapacityDim(varDecl.type());
// Issue #948: Opaque types use NULL initialization instead of {0}
// Issue #958: External typedef struct types also use NULL initialization
// Issue #996: ...but only for SCALAR handles, which are single pointers. An
// *array* of opaque handles needs a brace initializer ({0}), not a scalar
// NULL. Route arrays through generateInitializer, which uses
// getZeroInitializer(type, isArray) — the single source of truth for
// zero-initialization (ADR-015).
if ((isOpaque || isExternalStruct) && !isArray) {
decl += " = NULL";
} else {
decl += generateInitializer(varDecl, isArray, orchestrator);
}
return decl + ";";
}
/**
* Generate a scope function declaration.
* Returns array of output lines (function definition + optional callback typedef).
*/
function generateScopeFunction(
funcDecl: Parser.FunctionDeclarationContext,
declaringScope: IScopeSymbol | null,
isPrivate: boolean,
orchestrator: IOrchestrator,
): string[] {
const returnType = orchestrator.generateType(funcDecl.type());
const funcName = funcDecl.IDENTIFIER().getText();
// Use QualifiedNameGenerator for consistent C-style name generation
const fullName = QualifiedNameGenerator.forFunctionInScope(
declaringScope,
funcName,
);
const prefix = isPrivate ? "static " : "";
// Issue #269: Set current function name for pass-by-value lookup
orchestrator.setCurrentFunctionName(fullName);
// Track parameters for ADR-006 pointer semantics
orchestrator.setParameters(funcDecl.parameterList() ?? null);
// ADR-016: Enter function body context (also clears modifiedParameters for Issue #281)
orchestrator.enterFunctionBody();
// Issue #281: Generate body FIRST to track parameter modifications,
// then generate parameter list using that tracking info
const body = orchestrator.generateBlock(funcDecl.block());
// Issue #281: Update symbol's parameter info with auto-const before generating params
orchestrator.updateFunctionParamsAutoConst(fullName);
// Now generate parameter list (can use modifiedParameters for auto-const)
const params = funcDecl.parameterList()
? orchestrator.generateParameterList(funcDecl.parameterList()!)
: "void";
// ADR-016: Exit function body context
orchestrator.exitFunctionBody();
orchestrator.setCurrentFunctionName(null); // Issue #269: Clear function name
orchestrator.clearParameters();
const lines: string[] = [];
lines.push("", `${prefix}${returnType} ${fullName}(${params}) ${body}`);
// ADR-029: Generate callback typedef only if used as a type
orchestrator.recordCallbackTypedef(fullName);
return lines;
}
/**
* Generate enum members from AST when symbol info is not available.
* Returns array of formatted enum member lines.
*/
function generateEnumMembersFromAST(
members: Parser.EnumMemberContext[],
fullName: string,
orchestrator: IOrchestrator,
): string[] {
const lines: string[] = [];
let currentValue = 0;
for (let i = 0; i < members.length; i++) {
const member = members[i];
const memberName = member.IDENTIFIER().getText();
// #1285: qualified by the ENUM, not a scope -- see the note in
// generateScopedEnumInline. `fullName` is already fully qualified.
const fullMemberName = QualifiedCName.fromParts([fullName, memberName]);
if (member.expression()) {
const constValue = orchestrator.tryEvaluateConstant(member.expression()!);
Eif (constValue !== undefined) {
currentValue = constValue;
}
}
const comma = i < members.length - 1 ? "," : "";
lines.push(` ${fullMemberName} = ${currentValue}${comma}`);
currentValue++;
}
return lines;
}
/**
* Process a single scope member and return lines to add.
*/
function processScopeMember(
member: Parser.ScopeMemberContext,
declaringScope: IScopeSymbol | null,
input: IGeneratorInput,
state: IGeneratorState,
orchestrator: IOrchestrator,
): string[] {
// #1241: ADR-016's rule -- a scope member is emitted at file scope under a
// scope-qualified C name, with visibility deciding linkage -- fires once per
// member, here. Recorded at the MEMBER's position rather than the scope's, so
// a variable member and a function member land in different matrix contexts
// (scope-member vs scope-method) instead of both crediting whichever
// declaration the scope keyword happens to sit in.
AdrProvenance.record("016", member.start?.line);
// ADR-016: Member-type-aware visibility defaults via ScopeUtils
const explicitVisibility = member.visibilityModifier()?.getText();
const isFunction = member.functionDeclaration() !== null;
const visibility =
explicitVisibility ?? ScopeUtils.getDefaultVisibility(isFunction);
const isPrivate = visibility === "private";
// Handle variable declarations
if (member.variableDeclaration()) {
const varDecl = member.variableDeclaration()!;
const result = generateScopeVariable(
varDecl,
declaringScope,
isPrivate,
orchestrator,
);
return result === null ? [] : [result];
}
// Handle function declarations
if (member.functionDeclaration()) {
const funcDecl = member.functionDeclaration()!;
return generateScopeFunction(
funcDecl,
declaringScope,
isPrivate,
orchestrator,
);
}
// ADR-017: Handle enum declarations inside scopes
// Issue #369: Skip enum definition if self-include was added (it will be in the header)
if (member.enumDeclaration() && !state.selfIncludeAdded) {
const enumDecl = member.enumDeclaration()!;
return [
"",
generateScopedEnumInline(enumDecl, declaringScope, input, orchestrator),
];
}
// ADR-034: Handle bitmap declarations inside scopes
// Issue #369: Skip bitmap definition if self-include was added (it will be in the header)
if (member.bitmapDeclaration() && !state.selfIncludeAdded) {
const bitmapDecl = member.bitmapDeclaration()!;
return ["", generateScopedBitmapInline(bitmapDecl, declaringScope, input)];
}
// Handle register declarations inside scopes
if (member.registerDeclaration()) {
const regDecl = member.registerDeclaration()!;
const result = generateScopedRegister(
regDecl,
declaringScope,
input,
state,
orchestrator,
);
return ["", result.code];
}
// Handle struct declarations inside scopes
// Issue #369: Skip struct definition if self-include was added (it will be in the header)
if (member.structDeclaration() && !state.selfIncludeAdded) {
const structDecl = member.structDeclaration()!;
return [
"",
generateScopedStructInline(
structDecl,
declaringScope,
input,
orchestrator,
),
];
}
return [];
}
/**
* Generate C code from a C-Next scope declaration.
*
* ADR-016: Scopes provide:
* - Namespace prefixing (Scope_member)
* - Visibility control (private -> static, public -> extern)
* - Organization without runtime overhead
*/
const generateScope: TGeneratorFn<Parser.ScopeDeclarationContext> = (
node: Parser.ScopeDeclarationContext,
input: IGeneratorInput,
state: IGeneratorState,
orchestrator: IOrchestrator,
): IGeneratorOutput => {
const name = node.IDENTIFIER().getText();
// Set current scope for nested generation (imperative, not effect-based)
orchestrator.setCurrentScope(name);
// #1285: thread the scope SYMBOL, not its name, so every member below qualifies
// through the parent chain instead of re-joining one level from a leaf.
//
// Resolved here rather than read back from `CodeGenState.currentScope`: that
// would make the generated NAMES depend on `orchestrator.setCurrentScope` having
// reached global state, which is a side effect through an interface. A mock
// orchestrator that does not forward it produced bare names with nothing failing
// at the type level. `getOrCreateScope` is the same resolver `setCurrentScopeByPath`
// uses, and it is cached, so this is one decision asked twice -- not two decisions.
//
// Passing a leaf path is correct while `scopeMember` admits no `scopeDeclaration`;
// that limit is tracked as #1304 and is unchanged by this.
const declaringScope = SymbolRegistry.getOrCreateScope(name);
const lines: string[] = [];
lines.push(`/* Scope: ${name} */`);
for (const member of node.scopeMember()) {
lines.push(
...processScopeMember(member, declaringScope, input, state, orchestrator),
);
}
lines.push("");
// Clear scope at end
orchestrator.setCurrentScope(null);
return {
code: lines.join("\n"),
effects: [],
};
};
/**
* Generate enum inside a scope with proper prefixing.
* Uses symbol info for enum members if available.
*/
function generateScopedEnumInline(
node: Parser.EnumDeclarationContext,
declaringScope: IScopeSymbol | null,
input: IGeneratorInput,
orchestrator: IOrchestrator,
): string {
const { fullName } = getScopedName(node, declaringScope);
const lines: string[] = [`typedef enum {`];
// Try to get members from symbol info first
const symbolMembers = input.symbols?.enumMembers.get(fullName);
Iif (symbolMembers) {
const memberEntries = Array.from(symbolMembers.entries());
for (let i = 0; i < memberEntries.length; i++) {
const [memberName, value] = memberEntries[i];
// #1285: an enum member is qualified by its ENUM, not by a scope, and
// `fullName` is already fully qualified. Joining two qualified names is
// `QualifiedCName.fromParts`; routing it through `forMember` was what forced
// helper to keep taking plain strings, hiding a scope encoder behind an enum one.
const fullMemberName = QualifiedCName.fromParts([fullName, memberName]);
const comma = i < memberEntries.length - 1 ? "," : "";
lines.push(` ${fullMemberName} = ${value}${comma}`);
}
} else {
// Fall back to AST parsing
lines.push(
...generateEnumMembersFromAST(node.enumMember(), fullName, orchestrator),
);
}
lines.push(`} ${fullName};`, "");
return lines.join("\n");
}
/**
* Resolve bitmap backing type from symbols or keyword
*/
function _getBitmapBackingType(
fullName: string,
node: Parser.BitmapDeclarationContext,
input: IGeneratorInput,
): string {
const symbolType = input.symbols?.bitmapBackingType.get(fullName);
Iif (symbolType) return symbolType;
const bitmapKeyword = node.getChild(0)?.getText() || "bitmap32";
switch (bitmapKeyword) {
case "bitmap8":
return "uint8_t";
case "bitmap16":
return "uint16_t";
case "bitmap64":
return "uint64_t";
default:
return "uint32_t";
}
}
/**
* Generate bitmap field comments from AST (fallback when symbols unavailable)
*/
function _generateBitmapFieldCommentsFromAST(
fields: Parser.BitmapMemberContext[],
): string[] {
if (fields.length === 0) return [];
const lines: string[] = ["/* Fields:"];
let bitOffset = 0;
for (const field of fields) {
const fieldName = field.IDENTIFIER().getText();
const width = field.INTEGER_LITERAL()
? Number.parseInt(field.INTEGER_LITERAL()!.getText(), 10)
: 1;
const endBit = bitOffset + width - 1;
const bitRange =
width === 1 ? `bit ${bitOffset}` : `bits ${bitOffset}-${endBit}`;
lines.push(
` * ${fieldName}: ${bitRange} (${width} bit${width > 1 ? "s" : ""})`,
);
bitOffset += width;
}
lines.push(" */");
return lines;
}
/**
* Generate bitmap inside a scope with proper prefixing.
* Uses symbol info for backing type if available.
*/
function generateScopedBitmapInline(
node: Parser.BitmapDeclarationContext,
declaringScope: IScopeSymbol | null,
input: IGeneratorInput,
): string {
const name = node.IDENTIFIER().getText();
const fullName = QualifiedNameGenerator.forMember(declaringScope, name);
const backingType = _getBitmapBackingType(fullName, node, input);
const lines: string[] = [];
lines.push(`/* Bitmap: ${fullName} */`);
// Issue #707: Use shared utility for bitmap field comments
const symbolFields = input.symbols?.bitmapFields.get(fullName);
Iif (symbolFields) {
lines.push(...BitmapCommentUtils.generateBitmapFieldComments(symbolFields));
} else {
lines.push(..._generateBitmapFieldCommentsFromAST(node.bitmapMember()));
}
lines.push(`typedef ${backingType} ${fullName};`, "");
return lines.join("\n");
}
/**
* Generate a single struct field declaration for scoped struct.
*/
function generateScopedStructField(
member: Parser.StructMemberContext,
orchestrator: IOrchestrator,
): string {
const fieldName = member.IDENTIFIER().getText();
const fieldType = orchestrator.generateType(member.type());
// Handle C-Next style arrayType syntax (u16[8] arr)
const arrayTypeCtx = member.type().arrayType?.() ?? null;
let dimStr = ArrayDimensionUtils.generateArrayTypeDimension(
arrayTypeCtx,
orchestrator,
);
// Handle C-style array dimensions if present
const arrayDims = member.arrayDimension();
if (arrayDims.length > 0) {
dimStr += orchestrator.generateArrayDimensions(arrayDims);
}
// Handle string capacity for string fields
dimStr += ArrayDimensionUtils.generateStringCapacityDim(member.type());
return ` ${fieldType} ${fieldName}${dimStr};`;
}
/**
* Generate struct inside a scope with proper prefixing.
* Struct fields maintain their original types.
*/
function generateScopedStructInline(
node: Parser.StructDeclarationContext,
declaringScope: IScopeSymbol | null,
_input: IGeneratorInput,
orchestrator: IOrchestrator,
): string {
const { fullName } = getScopedName(node, declaringScope);
const lines: string[] = [`typedef struct ${fullName} {`];
// Process struct members
for (const member of node.structMember()) {
lines.push(generateScopedStructField(member, orchestrator));
}
lines.push(`} ${fullName};`, "");
return lines.join("\n");
}
export default generateScope;
|