feat(joinir): Phase 200-B/C/D capture analysis + Phase 201-A reserved_value_ids infra
Phase 200-B: FunctionScopeCaptureAnalyzer implementation - analyze_captured_vars_v2() with structural loop matching - CapturedEnv for immutable function-scope variables - ParamRole::Condition for condition-only variables Phase 200-C: ConditionEnvBuilder extension - build_with_captures() integrates CapturedEnv into ConditionEnv - fn_body propagation through LoopPatternContext to Pattern 2 Phase 200-D: E2E verification - capture detection working for base, limit, n etc. - Test files: phase200d_capture_minimal.hako, phase200d_capture_in_condition.hako Phase 201-A: MirBuilder reserved_value_ids infrastructure - reserved_value_ids: HashSet<ValueId> field in MirBuilder - next_value_id() skips reserved IDs - merge/mod.rs sets/clears reserved IDs around JoinIR merge Phase 201: JoinValueSpace design document - Param/Local/PHI disjoint regions design - API: alloc_param(), alloc_local(), reserve_phi() - Migration plan for Pattern 1-4 lowerers 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
nyash-codex
@ -95,20 +95,21 @@ impl CapturedEnv {
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/// Analyzes function-scoped variables that can be safely captured for loop conditions/body.
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///
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/// # Phase 200-A Status
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/// # Phase 200-B Implementation
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///
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/// Currently returns empty CapturedEnv (skeleton implementation).
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/// Actual capture detection will be implemented in Phase 200-B.
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/// Detects function-scoped variables that are effectively immutable constants
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/// within a loop context (e.g., `digits` in JsonParser._atoi()).
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///
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/// # Future Detection Criteria (Phase 200-B+)
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/// # Detection Criteria
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///
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/// A variable is captured if ALL of the following conditions are met:
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///
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/// 1. **Declared before the loop**: Variable must be declared in function scope before the loop
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/// 2. **Never reassigned**: Variable is never reassigned within the function (is_immutable = true)
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/// 3. **Referenced in loop**: Variable is referenced in loop condition or body
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/// 4. **Not a loop parameter**: Variable is not the loop iteration variable
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/// 5. **Not a body-local**: Variable is not declared inside the loop body
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/// 2. **Safe constant init**: Initialized with string/integer literal only
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/// 3. **Never reassigned**: Variable is never reassigned within the function (is_immutable = true)
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/// 4. **Referenced in loop**: Variable is referenced in loop condition or body
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/// 5. **Not a loop parameter**: Variable is not in scope.loop_params
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/// 6. **Not a body-local**: Variable is not in scope.body_locals
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///
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/// # Example
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///
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@ -127,31 +128,536 @@ impl CapturedEnv {
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///
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/// # Arguments
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///
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/// * `_fn_body` - AST nodes of the function body (for analysis)
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/// * `_loop_ast` - AST node of the loop statement
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/// * `_scope` - LoopScopeShape (for excluding loop params and body-locals)
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/// * `fn_body` - AST nodes of the function body (for analysis)
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/// * `loop_ast` - AST node of the loop statement
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/// * `scope` - LoopScopeShape (for excluding loop params and body-locals)
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///
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/// # Returns
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///
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/// `CapturedEnv` containing all captured variables (empty in Phase 200-A)
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/// `CapturedEnv` containing all captured variables
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pub fn analyze_captured_vars(
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_fn_body: &[ASTNode],
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_loop_ast: &ASTNode,
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_scope: &LoopScopeShape,
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fn_body: &[ASTNode],
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loop_ast: &ASTNode,
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scope: &LoopScopeShape,
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) -> CapturedEnv {
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// Phase 200-A: Skeleton implementation
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// TODO(Phase 200-B): Implement actual capture detection
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//
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// Detection algorithm:
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// 1. Find all `local` declarations before the loop in fn_body
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// 2. For each declaration:
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// a. Check if it's never reassigned in the function (is_immutable = true)
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// b. Check if it's referenced in loop condition or body
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// c. Exclude if it's in scope.pinned, scope.carriers, or scope.body_locals
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// 3. Collect matching variables into CapturedEnv
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// 4. Return the populated environment
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use std::env;
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CapturedEnv::new()
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let debug = env::var("NYASH_CAPTURE_DEBUG").is_ok();
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if debug {
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eprintln!("[capture/debug] Starting capture analysis");
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}
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// Step 1: Find loop position in fn_body
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let loop_index = match find_stmt_index(fn_body, loop_ast) {
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Some(idx) => idx,
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None => {
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if debug {
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eprintln!("[capture/debug] Loop not found in function body, returning empty CapturedEnv");
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}
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return CapturedEnv::new();
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}
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};
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if debug {
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eprintln!("[capture/debug] Loop found at index {}", loop_index);
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}
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// Step 2: Collect local declarations BEFORE the loop
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let pre_loop_locals = collect_local_declarations(&fn_body[..loop_index]);
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if debug {
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eprintln!("[capture/debug] Found {} pre-loop local declarations", pre_loop_locals.len());
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}
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let mut env = CapturedEnv::new();
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// Step 3: For each pre-loop local, check capture criteria
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for (name, init_expr) in pre_loop_locals {
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if debug {
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eprintln!("[capture/check] Checking variable '{}'", name);
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}
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// 3a: Is init expression a safe constant?
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if !is_safe_const_init(&init_expr) {
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if debug {
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eprintln!("[capture/reject] '{}': init is not a safe constant", name);
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}
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continue;
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}
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// 3b: Is this variable reassigned anywhere in fn_body?
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if is_reassigned_in_fn(fn_body, &name) {
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if debug {
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eprintln!("[capture/reject] '{}': reassigned in function", name);
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}
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continue;
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}
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// 3c: Is this variable used in loop (condition or body)?
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if !is_used_in_loop(loop_ast, &name) {
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if debug {
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eprintln!("[capture/reject] '{}': not used in loop", name);
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}
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continue;
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}
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// 3d: Skip if already in pinned, carriers, or body_locals
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if scope.pinned.contains(&name) {
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if debug {
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eprintln!("[capture/reject] '{}': is a pinned variable", name);
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}
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continue;
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}
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if scope.carriers.contains(&name) {
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if debug {
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eprintln!("[capture/reject] '{}': is a carrier variable", name);
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}
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continue;
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}
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if scope.body_locals.contains(&name) {
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if debug {
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eprintln!("[capture/reject] '{}': is a body-local variable", name);
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}
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continue;
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}
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// All checks passed: add to CapturedEnv
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// Note: We don't have access to variable_map here, so we use a placeholder ValueId
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// The actual host_id will be resolved in ConditionEnvBuilder
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if debug {
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eprintln!("[capture/accept] '{}': ALL CHECKS PASSED, adding to CapturedEnv", name);
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}
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env.add_var(CapturedVar {
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name: name.clone(),
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host_id: ValueId(0), // Placeholder, will be resolved in ConditionEnvBuilder
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is_immutable: true,
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});
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}
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if debug {
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eprintln!("[capture/result] Captured {} variables: {:?}",
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env.vars.len(),
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env.vars.iter().map(|v| &v.name).collect::<Vec<_>>()
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);
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}
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env
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}
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/// Phase 200-C: Analyze captured vars with condition/body instead of loop_ast
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///
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/// This variant solves the pointer comparison problem when the loop AST is constructed
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/// dynamically (e.g., in Pattern 2). Instead of passing a loop_ast reference,
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/// we pass the condition and body directly and perform structural matching.
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///
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/// # Arguments
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///
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/// * `fn_body` - AST nodes of the function body (for analysis)
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/// * `loop_condition` - Condition expression of the loop
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/// * `loop_body` - Body statements of the loop
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/// * `scope` - LoopScopeShape (for excluding loop params and body-locals)
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///
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/// # Returns
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///
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/// `CapturedEnv` containing all captured variables
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pub fn analyze_captured_vars_v2(
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fn_body: &[ASTNode],
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loop_condition: &ASTNode,
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loop_body: &[ASTNode],
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scope: &LoopScopeShape,
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) -> CapturedEnv {
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use std::env;
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let debug = env::var("NYASH_CAPTURE_DEBUG").is_ok();
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if debug {
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eprintln!("[capture/debug] Starting capture analysis v2 (structural matching)");
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}
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// Step 1: Find loop position in fn_body by structural matching
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let loop_index = match find_loop_index_by_structure(fn_body, loop_condition, loop_body) {
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Some(idx) => idx,
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None => {
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if debug {
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eprintln!("[capture/debug] Loop not found in function body by structure, returning empty CapturedEnv");
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}
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return CapturedEnv::new();
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}
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};
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if debug {
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eprintln!("[capture/debug] Loop found at index {} by structure", loop_index);
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}
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// Step 2: Collect local declarations BEFORE the loop
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let pre_loop_locals = collect_local_declarations(&fn_body[..loop_index]);
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if debug {
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eprintln!("[capture/debug] Found {} pre-loop local declarations", pre_loop_locals.len());
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}
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let mut env = CapturedEnv::new();
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// Step 3: For each pre-loop local, check capture criteria
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for (name, init_expr) in pre_loop_locals {
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if debug {
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eprintln!("[capture/check] Checking variable '{}'", name);
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}
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// 3a: Is init expression a safe constant?
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if !is_safe_const_init(&init_expr) {
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if debug {
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eprintln!("[capture/reject] '{}': init is not a safe constant", name);
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}
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continue;
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}
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// 3b: Is this variable reassigned anywhere in fn_body?
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if is_reassigned_in_fn(fn_body, &name) {
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if debug {
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eprintln!("[capture/reject] '{}': reassigned in function", name);
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}
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continue;
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}
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// 3c: Is this variable used in loop (condition or body)?
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if !is_used_in_loop_parts(loop_condition, loop_body, &name) {
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if debug {
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eprintln!("[capture/reject] '{}': not used in loop", name);
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}
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continue;
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}
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// 3d: Skip if already in pinned, carriers, or body_locals
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if scope.pinned.contains(&name) {
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if debug {
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eprintln!("[capture/reject] '{}': is a pinned variable", name);
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}
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continue;
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}
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if scope.carriers.contains(&name) {
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if debug {
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eprintln!("[capture/reject] '{}': is a carrier variable", name);
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}
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continue;
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}
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if scope.body_locals.contains(&name) {
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if debug {
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eprintln!("[capture/reject] '{}': is a body-local variable", name);
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}
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continue;
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}
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// All checks passed: add to CapturedEnv
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if debug {
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eprintln!("[capture/accept] '{}': ALL CHECKS PASSED, adding to CapturedEnv", name);
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}
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env.add_var(CapturedVar {
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name: name.clone(),
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host_id: ValueId(0), // Placeholder, will be resolved in ConditionEnvBuilder
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is_immutable: true,
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});
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}
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if debug {
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eprintln!("[capture/result] Captured {} variables: {:?}",
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env.vars.len(),
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env.vars.iter().map(|v| &v.name).collect::<Vec<_>>()
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);
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}
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env
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}
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/// Find the index of a loop statement in the function body
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///
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/// Returns Some(index) if found, None otherwise.
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fn find_stmt_index(fn_body: &[ASTNode], loop_ast: &ASTNode) -> Option<usize> {
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// Compare by pointer address (same AST node instance)
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fn_body.iter().position(|stmt| {
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std::ptr::eq(stmt as *const ASTNode, loop_ast as *const ASTNode)
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})
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}
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/// Phase 200-C: Find loop index by structure matching (condition + body comparison)
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///
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/// Instead of pointer comparison, compare the loop structure.
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/// This is useful when the loop AST is constructed dynamically.
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fn find_loop_index_by_structure(
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fn_body: &[ASTNode],
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target_condition: &ASTNode,
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target_body: &[ASTNode],
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) -> Option<usize> {
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for (idx, stmt) in fn_body.iter().enumerate() {
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if let ASTNode::Loop { condition, body, .. } = stmt {
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// Compare condition and body by structure
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if ast_matches(condition, target_condition) && body_matches(body, target_body) {
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return Some(idx);
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}
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}
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}
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None
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}
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/// Simple structural AST comparison
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///
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/// Uses Debug string comparison as a heuristic. This is not perfect but
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/// works well enough for finding loops by structure.
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fn ast_matches(a: &ASTNode, b: &ASTNode) -> bool {
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format!("{:?}", a) == format!("{:?}", b)
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}
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/// Compare two body slices by structure
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fn body_matches(a: &[ASTNode], b: &[ASTNode]) -> bool {
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if a.len() != b.len() {
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return false;
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}
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a.iter().zip(b.iter()).all(|(x, y)| ast_matches(x, y))
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}
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/// Collect local variable declarations from statements
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///
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/// Returns Vec<(name, init_expr)> for each variable declared with `local`.
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fn collect_local_declarations(stmts: &[ASTNode]) -> Vec<(String, Option<Box<ASTNode>>)> {
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let mut locals = Vec::new();
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for stmt in stmts {
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if let ASTNode::Local { variables, initial_values, .. } = stmt {
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// Local declaration can have multiple variables (e.g., local a, b, c)
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for (i, name) in variables.iter().enumerate() {
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let init_expr = initial_values.get(i).and_then(|opt| opt.clone());
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locals.push((name.clone(), init_expr));
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}
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}
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}
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locals
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}
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/// Check if expression is a safe constant (string/integer literal)
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///
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/// Phase 200-B: Only string and integer literals are allowed.
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/// Future: May expand to include other safe constant patterns.
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fn is_safe_const_init(expr: &Option<Box<ASTNode>>) -> bool {
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match expr {
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Some(boxed) => match boxed.as_ref() {
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ASTNode::Literal { value, .. } => matches!(
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value,
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crate::ast::LiteralValue::String(_) | crate::ast::LiteralValue::Integer(_)
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),
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_ => false,
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},
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None => false,
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}
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}
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/// Check if variable is reassigned anywhere in function body
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///
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/// Walks the entire function body AST to detect any assignments to the variable.
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/// Returns true if the variable is reassigned (excluding the initial local declaration).
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fn is_reassigned_in_fn(fn_body: &[ASTNode], name: &str) -> bool {
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fn check_node(node: &ASTNode, name: &str) -> bool {
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match node {
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// Assignment to this variable
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ASTNode::Assignment { target, value, .. } => {
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// Check if target is the variable we're looking for
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let is_target_match = match target.as_ref() {
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ASTNode::Variable { name: var_name, .. } => var_name == name,
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ASTNode::FieldAccess { .. } | ASTNode::Index { .. } => {
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// Field access or index assignment doesn't count as reassignment
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false
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}
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_ => false,
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};
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is_target_match || check_node(value, name)
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}
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// Grouped assignment expression: (x = expr)
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ASTNode::GroupedAssignmentExpr { lhs, rhs, .. } => {
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lhs == name || check_node(rhs, name)
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}
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// Recursive cases
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ASTNode::If { condition, then_body, else_body, .. } => {
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check_node(condition, name)
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|| then_body.iter().any(|n| check_node(n, name))
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|| else_body.as_ref().map_or(false, |body| body.iter().any(|n| check_node(n, name)))
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}
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ASTNode::Loop { condition, body, .. } => {
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check_node(condition, name) || body.iter().any(|n| check_node(n, name))
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}
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ASTNode::While { condition, body, .. } => {
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check_node(condition, name) || body.iter().any(|n| check_node(n, name))
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}
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ASTNode::TryCatch { try_body, catch_clauses, finally_body, .. } => {
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try_body.iter().any(|n| check_node(n, name))
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|| catch_clauses.iter().any(|clause| clause.body.iter().any(|n| check_node(n, name)))
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|| finally_body.as_ref().map_or(false, |body| body.iter().any(|n| check_node(n, name)))
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}
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ASTNode::UnaryOp { operand, .. } => check_node(operand, name),
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ASTNode::BinaryOp { left, right, .. } => {
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check_node(left, name) || check_node(right, name)
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}
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ASTNode::MethodCall { object, arguments, .. } => {
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check_node(object, name) || arguments.iter().any(|arg| check_node(arg, name))
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}
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ASTNode::FunctionCall { arguments, .. } => {
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arguments.iter().any(|arg| check_node(arg, name))
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}
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ASTNode::FieldAccess { object, .. } => check_node(object, name),
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ASTNode::Index { target, index, .. } => {
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check_node(target, name) || check_node(index, name)
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}
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ASTNode::Return { value, .. } => {
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value.as_ref().map_or(false, |v| check_node(v, name))
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}
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|
||||
ASTNode::Local { .. } => {
|
||||
// Local declarations are not reassignments
|
||||
false
|
||||
}
|
||||
|
||||
_ => false,
|
||||
}
|
||||
}
|
||||
|
||||
fn_body.iter().any(|stmt| check_node(stmt, name))
|
||||
}
|
||||
|
||||
/// Check if variable is referenced in loop condition or body
|
||||
///
|
||||
/// Returns true if the variable name appears anywhere in the loop AST.
|
||||
fn is_used_in_loop(loop_ast: &ASTNode, name: &str) -> bool {
|
||||
fn check_usage(node: &ASTNode, name: &str) -> bool {
|
||||
match node {
|
||||
ASTNode::Variable { name: var_name, .. } => var_name == name,
|
||||
|
||||
ASTNode::Loop { condition, body, .. } => {
|
||||
check_usage(condition, name) || body.iter().any(|n| check_usage(n, name))
|
||||
}
|
||||
|
||||
ASTNode::If { condition, then_body, else_body, .. } => {
|
||||
check_usage(condition, name)
|
||||
|| then_body.iter().any(|n| check_usage(n, name))
|
||||
|| else_body.as_ref().map_or(false, |body| body.iter().any(|n| check_usage(n, name)))
|
||||
}
|
||||
|
||||
ASTNode::Assignment { target, value, .. } => {
|
||||
check_usage(target, name) || check_usage(value, name)
|
||||
}
|
||||
|
||||
ASTNode::UnaryOp { operand, .. } => check_usage(operand, name),
|
||||
|
||||
ASTNode::BinaryOp { left, right, .. } => {
|
||||
check_usage(left, name) || check_usage(right, name)
|
||||
}
|
||||
|
||||
ASTNode::MethodCall { object, arguments, .. } => {
|
||||
check_usage(object, name) || arguments.iter().any(|arg| check_usage(arg, name))
|
||||
}
|
||||
|
||||
ASTNode::FunctionCall { arguments, .. } => {
|
||||
arguments.iter().any(|arg| check_usage(arg, name))
|
||||
}
|
||||
|
||||
ASTNode::FieldAccess { object, .. } => check_usage(object, name),
|
||||
|
||||
ASTNode::Index { target, index, .. } => {
|
||||
check_usage(target, name) || check_usage(index, name)
|
||||
}
|
||||
|
||||
ASTNode::Return { value, .. } => {
|
||||
value.as_ref().map_or(false, |v| check_usage(v, name))
|
||||
}
|
||||
|
||||
ASTNode::Local { initial_values, .. } => {
|
||||
initial_values.iter().any(|opt| {
|
||||
opt.as_ref().map_or(false, |init| check_usage(init, name))
|
||||
})
|
||||
}
|
||||
|
||||
_ => false,
|
||||
}
|
||||
}
|
||||
|
||||
check_usage(loop_ast, name)
|
||||
}
|
||||
|
||||
/// Phase 200-C: Check if variable is used in loop condition or body (separate parts)
|
||||
///
|
||||
/// This is used by analyze_captured_vars_v2 when condition and body are passed separately.
|
||||
fn is_used_in_loop_parts(condition: &ASTNode, body: &[ASTNode], name: &str) -> bool {
|
||||
fn check_usage(node: &ASTNode, name: &str) -> bool {
|
||||
match node {
|
||||
ASTNode::Variable { name: var_name, .. } => var_name == name,
|
||||
|
||||
ASTNode::Loop { condition, body, .. } => {
|
||||
check_usage(condition, name) || body.iter().any(|n| check_usage(n, name))
|
||||
}
|
||||
|
||||
ASTNode::If { condition, then_body, else_body, .. } => {
|
||||
check_usage(condition, name)
|
||||
|| then_body.iter().any(|n| check_usage(n, name))
|
||||
|| else_body.as_ref().map_or(false, |body| body.iter().any(|n| check_usage(n, name)))
|
||||
}
|
||||
|
||||
ASTNode::Assignment { target, value, .. } => {
|
||||
check_usage(target, name) || check_usage(value, name)
|
||||
}
|
||||
|
||||
ASTNode::UnaryOp { operand, .. } => check_usage(operand, name),
|
||||
|
||||
ASTNode::BinaryOp { left, right, .. } => {
|
||||
check_usage(left, name) || check_usage(right, name)
|
||||
}
|
||||
|
||||
ASTNode::MethodCall { object, arguments, .. } => {
|
||||
check_usage(object, name) || arguments.iter().any(|arg| check_usage(arg, name))
|
||||
}
|
||||
|
||||
ASTNode::FunctionCall { arguments, .. } => {
|
||||
arguments.iter().any(|arg| check_usage(arg, name))
|
||||
}
|
||||
|
||||
ASTNode::FieldAccess { object, .. } => check_usage(object, name),
|
||||
|
||||
ASTNode::Index { target, index, .. } => {
|
||||
check_usage(target, name) || check_usage(index, name)
|
||||
}
|
||||
|
||||
ASTNode::Return { value, .. } => {
|
||||
value.as_ref().map_or(false, |v| check_usage(v, name))
|
||||
}
|
||||
|
||||
ASTNode::Local { initial_values, .. } => {
|
||||
initial_values.iter().any(|opt| {
|
||||
opt.as_ref().map_or(false, |init| check_usage(init, name))
|
||||
})
|
||||
}
|
||||
|
||||
_ => false,
|
||||
}
|
||||
}
|
||||
|
||||
check_usage(condition, name) || body.iter().any(|n| check_usage(n, name))
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
@ -200,4 +706,372 @@ mod tests {
|
||||
assert!(env.get("table").is_some());
|
||||
assert!(env.get("nonexistent").is_none());
|
||||
}
|
||||
|
||||
// Phase 200-B: Capture analysis tests
|
||||
|
||||
#[test]
|
||||
fn test_capture_simple_digits() {
|
||||
use crate::ast::{ASTNode, LiteralValue, Span};
|
||||
|
||||
// Build AST for:
|
||||
// local digits = "0123456789"
|
||||
// loop(i < 10) {
|
||||
// local pos = digits.indexOf(ch)
|
||||
// }
|
||||
|
||||
let digits_decl = ASTNode::Local {
|
||||
variables: vec!["digits".to_string()],
|
||||
initial_values: vec![Some(Box::new(ASTNode::Literal {
|
||||
value: LiteralValue::String("0123456789".to_string()),
|
||||
span: Span::unknown(),
|
||||
}))],
|
||||
span: Span::unknown(),
|
||||
};
|
||||
|
||||
let loop_body = vec![ASTNode::Local {
|
||||
variables: vec!["pos".to_string()],
|
||||
initial_values: vec![Some(Box::new(ASTNode::MethodCall {
|
||||
object: Box::new(ASTNode::Variable {
|
||||
name: "digits".to_string(),
|
||||
span: Span::unknown(),
|
||||
}),
|
||||
method: "indexOf".to_string(),
|
||||
arguments: vec![ASTNode::Variable {
|
||||
name: "ch".to_string(),
|
||||
span: Span::unknown(),
|
||||
}],
|
||||
span: Span::unknown(),
|
||||
}))],
|
||||
span: Span::unknown(),
|
||||
}];
|
||||
|
||||
let loop_node = ASTNode::Loop {
|
||||
condition: Box::new(ASTNode::BinaryOp {
|
||||
operator: crate::ast::BinaryOperator::Less,
|
||||
left: Box::new(ASTNode::Variable {
|
||||
name: "i".to_string(),
|
||||
span: Span::unknown(),
|
||||
}),
|
||||
right: Box::new(ASTNode::Literal {
|
||||
value: LiteralValue::Integer(10),
|
||||
span: Span::unknown(),
|
||||
}),
|
||||
span: Span::unknown(),
|
||||
}),
|
||||
body: loop_body,
|
||||
span: Span::unknown(),
|
||||
};
|
||||
|
||||
let fn_body = vec![digits_decl, loop_node.clone()];
|
||||
|
||||
use std::collections::{BTreeSet, BTreeMap};
|
||||
use crate::mir::BasicBlockId;
|
||||
|
||||
let scope = crate::mir::join_ir::lowering::loop_scope_shape::LoopScopeShape {
|
||||
header: BasicBlockId(0),
|
||||
body: BasicBlockId(1),
|
||||
latch: BasicBlockId(2),
|
||||
exit: BasicBlockId(3),
|
||||
pinned: BTreeSet::from(["i".to_string()]),
|
||||
carriers: BTreeSet::new(),
|
||||
body_locals: BTreeSet::from(["pos".to_string()]),
|
||||
exit_live: BTreeSet::new(),
|
||||
progress_carrier: None,
|
||||
variable_definitions: BTreeMap::new(),
|
||||
};
|
||||
|
||||
// IMPORTANT: Pass a reference to the same loop_node instance that's in fn_body
|
||||
// find_stmt_index uses pointer comparison, so we must use &fn_body[1] instead of &loop_node
|
||||
let env = analyze_captured_vars(&fn_body, &fn_body[1], &scope);
|
||||
|
||||
assert_eq!(env.vars.len(), 1);
|
||||
assert!(env.get("digits").is_some());
|
||||
let var = env.get("digits").unwrap();
|
||||
assert_eq!(var.name, "digits");
|
||||
assert!(var.is_immutable);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_capture_reassigned_rejected() {
|
||||
use crate::ast::{ASTNode, LiteralValue, Span};
|
||||
|
||||
// Build AST for:
|
||||
// local digits = "0123456789"
|
||||
// digits = "abc" // reassignment
|
||||
// loop(i < 10) {
|
||||
// local pos = digits.indexOf(ch)
|
||||
// }
|
||||
|
||||
let digits_decl = ASTNode::Local {
|
||||
variables: vec!["digits".to_string()],
|
||||
initial_values: vec![Some(Box::new(ASTNode::Literal {
|
||||
value: LiteralValue::String("0123456789".to_string()),
|
||||
span: Span::unknown(),
|
||||
}))],
|
||||
span: Span::unknown(),
|
||||
};
|
||||
|
||||
let reassignment = ASTNode::Assignment {
|
||||
target: Box::new(ASTNode::Variable {
|
||||
name: "digits".to_string(),
|
||||
span: Span::unknown(),
|
||||
}),
|
||||
value: Box::new(ASTNode::Literal {
|
||||
value: LiteralValue::String("abc".to_string()),
|
||||
span: Span::unknown(),
|
||||
}),
|
||||
span: Span::unknown(),
|
||||
};
|
||||
|
||||
let loop_body = vec![ASTNode::Local {
|
||||
variables: vec!["pos".to_string()],
|
||||
initial_values: vec![Some(Box::new(ASTNode::MethodCall {
|
||||
object: Box::new(ASTNode::Variable {
|
||||
name: "digits".to_string(),
|
||||
span: Span::unknown(),
|
||||
}),
|
||||
method: "indexOf".to_string(),
|
||||
arguments: vec![],
|
||||
span: Span::unknown(),
|
||||
}))],
|
||||
span: Span::unknown(),
|
||||
}];
|
||||
|
||||
let loop_node = ASTNode::Loop {
|
||||
condition: Box::new(ASTNode::BinaryOp {
|
||||
operator: crate::ast::BinaryOperator::Less,
|
||||
left: Box::new(ASTNode::Variable {
|
||||
name: "i".to_string(),
|
||||
span: Span::unknown(),
|
||||
}),
|
||||
right: Box::new(ASTNode::Literal {
|
||||
value: LiteralValue::Integer(10),
|
||||
span: Span::unknown(),
|
||||
}),
|
||||
span: Span::unknown(),
|
||||
}),
|
||||
body: loop_body,
|
||||
span: Span::unknown(),
|
||||
};
|
||||
|
||||
let fn_body = vec![digits_decl, reassignment, loop_node.clone()];
|
||||
|
||||
use std::collections::{BTreeSet, BTreeMap};
|
||||
use crate::mir::BasicBlockId;
|
||||
|
||||
let scope = crate::mir::join_ir::lowering::loop_scope_shape::LoopScopeShape {
|
||||
header: BasicBlockId(0),
|
||||
body: BasicBlockId(1),
|
||||
latch: BasicBlockId(2),
|
||||
exit: BasicBlockId(3),
|
||||
pinned: BTreeSet::from(["i".to_string()]),
|
||||
carriers: BTreeSet::new(),
|
||||
body_locals: BTreeSet::from(["pos".to_string()]),
|
||||
exit_live: BTreeSet::new(),
|
||||
progress_carrier: None,
|
||||
variable_definitions: BTreeMap::new(),
|
||||
};
|
||||
|
||||
let env = analyze_captured_vars(&fn_body, &loop_node, &scope);
|
||||
|
||||
// Should reject because digits is reassigned
|
||||
assert_eq!(env.vars.len(), 0);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_capture_after_loop_rejected() {
|
||||
use crate::ast::{ASTNode, LiteralValue, Span};
|
||||
|
||||
// Build AST for:
|
||||
// loop(i < 10) { }
|
||||
// local digits = "0123456789" // defined AFTER loop
|
||||
|
||||
let loop_node = ASTNode::Loop {
|
||||
condition: Box::new(ASTNode::BinaryOp {
|
||||
operator: crate::ast::BinaryOperator::Less,
|
||||
left: Box::new(ASTNode::Variable {
|
||||
name: "i".to_string(),
|
||||
span: Span::unknown(),
|
||||
}),
|
||||
right: Box::new(ASTNode::Literal {
|
||||
value: LiteralValue::Integer(10),
|
||||
span: Span::unknown(),
|
||||
}),
|
||||
span: Span::unknown(),
|
||||
}),
|
||||
body: vec![],
|
||||
span: Span::unknown(),
|
||||
};
|
||||
|
||||
let digits_decl = ASTNode::Local {
|
||||
variables: vec!["digits".to_string()],
|
||||
initial_values: vec![Some(Box::new(ASTNode::Literal {
|
||||
value: LiteralValue::String("0123456789".to_string()),
|
||||
span: Span::unknown(),
|
||||
}))],
|
||||
span: Span::unknown(),
|
||||
};
|
||||
|
||||
let fn_body = vec![loop_node.clone(), digits_decl];
|
||||
|
||||
use std::collections::{BTreeSet, BTreeMap};
|
||||
use crate::mir::BasicBlockId;
|
||||
|
||||
let scope = crate::mir::join_ir::lowering::loop_scope_shape::LoopScopeShape {
|
||||
header: BasicBlockId(0),
|
||||
body: BasicBlockId(1),
|
||||
latch: BasicBlockId(2),
|
||||
exit: BasicBlockId(3),
|
||||
pinned: BTreeSet::from(["i".to_string()]),
|
||||
carriers: BTreeSet::new(),
|
||||
body_locals: BTreeSet::new(),
|
||||
exit_live: BTreeSet::new(),
|
||||
progress_carrier: None,
|
||||
variable_definitions: BTreeMap::new(),
|
||||
};
|
||||
|
||||
let env = analyze_captured_vars(&fn_body, &loop_node, &scope);
|
||||
|
||||
// Should reject because digits is defined after the loop
|
||||
assert_eq!(env.vars.len(), 0);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_capture_method_call_init_rejected() {
|
||||
use crate::ast::{ASTNode, LiteralValue, Span};
|
||||
|
||||
// Build AST for:
|
||||
// local result = someBox.getValue() // MethodCall init
|
||||
// loop(i < 10) {
|
||||
// local x = result.something()
|
||||
// }
|
||||
|
||||
let result_decl = ASTNode::Local {
|
||||
variables: vec!["result".to_string()],
|
||||
initial_values: vec![Some(Box::new(ASTNode::MethodCall {
|
||||
object: Box::new(ASTNode::Variable {
|
||||
name: "someBox".to_string(),
|
||||
span: Span::unknown(),
|
||||
}),
|
||||
method: "getValue".to_string(),
|
||||
arguments: vec![],
|
||||
span: Span::unknown(),
|
||||
}))],
|
||||
span: Span::unknown(),
|
||||
};
|
||||
|
||||
let loop_body = vec![ASTNode::Local {
|
||||
variables: vec!["x".to_string()],
|
||||
initial_values: vec![Some(Box::new(ASTNode::MethodCall {
|
||||
object: Box::new(ASTNode::Variable {
|
||||
name: "result".to_string(),
|
||||
span: Span::unknown(),
|
||||
}),
|
||||
method: "something".to_string(),
|
||||
arguments: vec![],
|
||||
span: Span::unknown(),
|
||||
}))],
|
||||
span: Span::unknown(),
|
||||
}];
|
||||
|
||||
let loop_node = ASTNode::Loop {
|
||||
condition: Box::new(ASTNode::BinaryOp {
|
||||
operator: crate::ast::BinaryOperator::Less,
|
||||
left: Box::new(ASTNode::Variable {
|
||||
name: "i".to_string(),
|
||||
span: Span::unknown(),
|
||||
}),
|
||||
right: Box::new(ASTNode::Literal {
|
||||
value: LiteralValue::Integer(10),
|
||||
span: Span::unknown(),
|
||||
}),
|
||||
span: Span::unknown(),
|
||||
}),
|
||||
body: loop_body,
|
||||
span: Span::unknown(),
|
||||
};
|
||||
|
||||
let fn_body = vec![result_decl, loop_node.clone()];
|
||||
|
||||
use std::collections::{BTreeSet, BTreeMap};
|
||||
use crate::mir::BasicBlockId;
|
||||
|
||||
let scope = crate::mir::join_ir::lowering::loop_scope_shape::LoopScopeShape {
|
||||
header: BasicBlockId(0),
|
||||
body: BasicBlockId(1),
|
||||
latch: BasicBlockId(2),
|
||||
exit: BasicBlockId(3),
|
||||
pinned: BTreeSet::from(["i".to_string()]),
|
||||
carriers: BTreeSet::new(),
|
||||
body_locals: BTreeSet::from(["x".to_string()]),
|
||||
exit_live: BTreeSet::new(),
|
||||
progress_carrier: None,
|
||||
variable_definitions: BTreeMap::new(),
|
||||
};
|
||||
|
||||
let env = analyze_captured_vars(&fn_body, &loop_node, &scope);
|
||||
|
||||
// Should reject because result is initialized with MethodCall (not safe constant)
|
||||
assert_eq!(env.vars.len(), 0);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_capture_unused_in_loop_rejected() {
|
||||
use crate::ast::{ASTNode, LiteralValue, Span};
|
||||
|
||||
// Build AST for:
|
||||
// local digits = "0123456789" // not used in loop
|
||||
// loop(i < 10) {
|
||||
// print(i) // doesn't use digits
|
||||
// }
|
||||
|
||||
let digits_decl = ASTNode::Local {
|
||||
variables: vec!["digits".to_string()],
|
||||
initial_values: vec![Some(Box::new(ASTNode::Literal {
|
||||
value: LiteralValue::String("0123456789".to_string()),
|
||||
span: Span::unknown(),
|
||||
}))],
|
||||
span: Span::unknown(),
|
||||
};
|
||||
|
||||
let loop_node = ASTNode::Loop {
|
||||
condition: Box::new(ASTNode::BinaryOp {
|
||||
operator: crate::ast::BinaryOperator::Less,
|
||||
left: Box::new(ASTNode::Variable {
|
||||
name: "i".to_string(),
|
||||
span: Span::unknown(),
|
||||
}),
|
||||
right: Box::new(ASTNode::Literal {
|
||||
value: LiteralValue::Integer(10),
|
||||
span: Span::unknown(),
|
||||
}),
|
||||
span: Span::unknown(),
|
||||
}),
|
||||
body: vec![], // empty body, no usage of digits
|
||||
span: Span::unknown(),
|
||||
};
|
||||
|
||||
let fn_body = vec![digits_decl, loop_node.clone()];
|
||||
|
||||
use std::collections::{BTreeSet, BTreeMap};
|
||||
use crate::mir::BasicBlockId;
|
||||
|
||||
let scope = crate::mir::join_ir::lowering::loop_scope_shape::LoopScopeShape {
|
||||
header: BasicBlockId(0),
|
||||
body: BasicBlockId(1),
|
||||
latch: BasicBlockId(2),
|
||||
exit: BasicBlockId(3),
|
||||
pinned: BTreeSet::from(["i".to_string()]),
|
||||
carriers: BTreeSet::new(),
|
||||
body_locals: BTreeSet::new(),
|
||||
exit_live: BTreeSet::new(),
|
||||
progress_carrier: None,
|
||||
variable_definitions: BTreeMap::new(),
|
||||
};
|
||||
|
||||
let env = analyze_captured_vars(&fn_body, &loop_node, &scope);
|
||||
|
||||
// Should reject because digits is not used in loop
|
||||
assert_eq!(env.vars.len(), 0);
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user