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feat: 支持箭头函数/模板字符串/let/const/delete/instanceof 语法

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This commit is contained in:
爱特每羊队
2026-06-08 19:55:05 +08:00
parent a6e448e326
commit 209374fc02
15 changed files with 1379 additions and 91 deletions
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crates/oxide_compiler/src/compiler.rs
+83 -21
View File
@@ -6,7 +6,9 @@ use crate::symbol_table::{Binding, SymbolTable};
pub use crate::hash::structural_hash;
pub use crate::module::Constant;
pub use oxide_parser::VariableDeclarationKind;
pub use oxide_parser::{AssignmentOperator, BinaryOperator, Expression, Statement, UnaryOperator};
use crate::symbol_table::ScopeKind;
pub struct Compiler;
@@ -63,6 +65,10 @@ pub(crate) struct CompileCtx {
pub(crate) projected_pc: usize,
pub(crate) builtin_reg_map: Vec<(String, u8)>,
pub(crate) sub_modules: Vec<CompiledModule>,
/// Register holding `this` in the enclosing function context.
/// Used by arrow functions to capture lexical `this` (D-01).
/// Initialized to 254 (conventional this register) at the top level.
pub(crate) enclosing_this_reg: u8,
}
impl CompileCtx {
@@ -80,6 +86,7 @@ impl CompileCtx {
projected_pc: 0,
builtin_reg_map: Vec::new(),
sub_modules: Vec::new(),
enclosing_this_reg: 254, // conventional this register at top level
}
}
@@ -126,12 +133,29 @@ impl CompileCtx {
self.symbols.pop_scope();
}
pub(crate) fn declare(&mut self, name: &str, reg: u8) -> Result<(), String> {
self.symbols.declare(name, reg)
pub(crate) fn declare(
&mut self,
name: &str,
reg: u8,
kind: VariableDeclarationKind,
is_const: bool,
) -> Result<(), String> {
self.symbols.declare(name, reg, kind, is_const)
}
pub(crate) fn declare_initialized(&mut self, name: &str, reg: u8) -> Result<(), String> {
self.symbols.declare_initialized(name, reg)
pub(crate) fn declare_initialized(
&mut self,
name: &str,
reg: u8,
kind: VariableDeclarationKind,
is_const: bool,
) -> Result<(), String> {
self.symbols.declare_initialized(name, reg, kind, is_const)
}
#[allow(dead_code)]
pub(crate) fn push_scope_with_kind(&mut self, kind: ScopeKind) {
self.symbols.push_scope_with_kind(kind);
}
pub(crate) fn lookup(&self, name: &str) -> Result<u8, String> {
@@ -143,6 +167,10 @@ impl CompileCtx {
self.symbols.lookup_or_global(name, reg)
}
pub(crate) fn lookup_const_flag(&self, name: &str) -> bool {
self.symbols.lookup_is_const(name)
}
pub(crate) fn init_var(&mut self, name: &str) {
self.symbols.init_var(name);
}
@@ -225,13 +253,16 @@ impl Compiler {
Self
}
/// Compile a function body (used for FD and FE).
/// Compile a function body (used for FD, FE, and arrow functions).
/// This performs both counting and emitting in one pass.
/// When `is_expression_body` is true (arrow function with expression body),
/// the last expression's value is returned instead of undefined.
pub(crate) fn compile_function_body<'a>(
&self,
param_names: &[String],
body_stmts: &[Statement<'a>],
parent_ctx: &CompileCtx,
is_expression_body: bool,
) -> Result<CompiledModule, String> {
let mut ctx = CompileCtx::new();
@@ -239,14 +270,18 @@ impl Compiler {
// resolve to the correct pre-allocated registers in the sub-module's register file.
ctx.builtin_reg_map = parent_ctx.builtin_reg_map.clone();
// Propagate enclosing_this_reg so nested arrow functions capture the correct `this`.
ctx.enclosing_this_reg = parent_ctx.enclosing_this_reg;
// Inherit parent's global scope entries so previously-declared function names
// are visible from within the body.
for (name, binding) in &parent_ctx.symbols.scopes[0] {
ctx.symbols.scopes[0].insert(
for (name, binding) in &parent_ctx.symbols.scopes[0].bindings {
ctx.symbols.scopes[0].bindings.insert(
name.clone(),
Binding {
reg: binding.reg,
initialized: binding.initialized,
is_const: binding.is_const,
},
);
}
@@ -256,12 +291,12 @@ impl Compiler {
ctx.reset_regs();
// Function body scope - params and local vars
ctx.push_scope();
ctx.push_scope_with_kind(ScopeKind::FunctionScope);
// Register parameters as initialized.
for name in param_names {
let reg = ctx.alloc_reg();
ctx.declare_initialized(name, reg)?;
ctx.declare_initialized(name, reg, VariableDeclarationKind::Var, false)?;
}
// Count pass
@@ -274,24 +309,45 @@ impl Compiler {
// Emit pass - reallocate params (same order = same regs after reset)
for name in param_names {
let reg = ctx.alloc_reg();
ctx.declare_initialized(name, reg)?;
ctx.declare_initialized(name, reg, VariableDeclarationKind::Var, false)?;
}
// Emit body statements.
// After all statements, emit an implicit RETURN undefined.
// Capture the last statement's expression result for expression-body arrows.
let mut last_result_reg = None;
for stmt in body_stmts {
let _ = self.emit_statement(stmt, &mut ctx)?;
if let Some(reg) = self.emit_statement(stmt, &mut ctx)? {
last_result_reg = Some(reg);
}
}
let undef_idx = ctx.add_constant(Constant::Undefined);
let undef_reg = ctx.alloc_reg();
ctx.emit(opcode::encode(
OpCode::LOAD_CONST,
undef_reg,
(undef_idx & 0xFF) as u8,
((undef_idx >> 8) & 0xFF) as u8,
));
ctx.emit(opcode::encode(OpCode::RETURN, undef_reg, 0, 0));
// Emit implicit RETURN: expression body returns the last expression,
// statement body returns undefined.
if is_expression_body {
if let Some(reg) = last_result_reg {
ctx.emit(opcode::encode(OpCode::RETURN, reg, 0, 0));
} else {
let undef_idx = ctx.add_constant(Constant::Undefined);
let undef_reg = ctx.alloc_reg();
ctx.emit(opcode::encode(
OpCode::LOAD_CONST,
undef_reg,
(undef_idx & 0xFF) as u8,
((undef_idx >> 8) & 0xFF) as u8,
));
ctx.emit(opcode::encode(OpCode::RETURN, undef_reg, 0, 0));
}
} else {
let undef_idx = ctx.add_constant(Constant::Undefined);
let undef_reg = ctx.alloc_reg();
ctx.emit(opcode::encode(
OpCode::LOAD_CONST,
undef_reg,
(undef_idx & 0xFF) as u8,
((undef_idx >> 8) & 0xFF) as u8,
));
ctx.emit(opcode::encode(OpCode::RETURN, undef_reg, 0, 0));
}
Ok(CompiledModule {
bytecode: ctx.bytecode,
@@ -300,6 +356,9 @@ impl Compiler {
n_args: param_names.len() as u8,
builtin_reg_map: ctx.builtin_reg_map,
sub_modules: ctx.sub_modules,
is_arrow: false,
captured_this_const_idx: 0,
function_name: None,
})
}
@@ -353,6 +412,9 @@ impl Compiler {
n_args: 0,
builtin_reg_map: ctx.builtin_reg_map,
sub_modules: ctx.sub_modules,
is_arrow: false,
captured_this_const_idx: 0,
function_name: None,
})
}
}
crates/oxide_compiler/src/counter.rs
+100 -4
View File
@@ -1,5 +1,6 @@
use oxide_parser::{
AssignmentOperator, Expression, ForStatementInit, SimpleAssignmentTarget, Statement,
UnaryOperator, VariableDeclarationKind,
};
use crate::compiler::{is_side_effect_free, CompileCtx, Compiler, Label};
@@ -189,7 +190,7 @@ impl Compiler {
// Hoisting: declare function name as initialized
let func_reg = ctx.alloc_reg();
let _ = ctx.declare_initialized(&name, func_reg);
let _ = ctx.declare_initialized(&name, func_reg, VariableDeclarationKind::Var, false);
// Body is compiled in the emit pass only.
// FD emits LOAD_CONST(BytecodeFunc) + STORE_VAR
@@ -269,9 +270,32 @@ impl Compiler {
ctx.projected_pc += 1; // ADD/SUB/MUL/DIV/etc.
}
Expression::UnaryExpression(un) => {
self.count_expression(&un.argument, ctx);
ctx.alloc_reg();
ctx.projected_pc += 1; // NEG/TYPEOF/VOID/NOT
match un.operator {
UnaryOperator::Delete => {
match &un.argument {
Expression::Identifier(_) => {
// SyntaxError at compile time, no bytecode cost
}
Expression::StaticMemberExpression(member) => {
self.count_expression(&member.object, ctx);
ctx.alloc_reg();
ctx.projected_pc += 2; // DELETE_PROP_STATIC + ext word
}
Expression::ComputedMemberExpression(member) => {
self.count_expression(&member.object, ctx);
self.count_expression(&member.expression, ctx);
ctx.alloc_reg();
ctx.projected_pc += 1; // DELETE_PROP_DYNAMIC
}
_ => {}
}
}
_ => {
self.count_expression(&un.argument, ctx);
ctx.alloc_reg();
ctx.projected_pc += 1; // NEG/TYPEOF/VOID/NOT
}
}
}
Expression::CallExpression(call) => {
match &call.callee {
@@ -394,6 +418,78 @@ impl Compiler {
}
}
}
Expression::TemplateLiteral(tl) => {
// TemplateLiteral: N quasis (strings) + M expressions interleaved.
// Allocate 1 result reg + count expressions.
for expr in &tl.expressions {
self.count_expression(expr, ctx);
}
ctx.alloc_reg(); // result reg
let segment_count = tl.quasis.len() + tl.expressions.len();
// TEMPLATE_STR opcode + ext words (1 header + ceil(segments/1) per u32)
ctx.projected_pc += 1 + 1 + segment_count;
}
Expression::TaggedTemplateExpression(tt) => {
// Tagged template: tag expr + quasis as LOAD_CONST + expression args + CALL
// Consecutive arg registers at end (via LOAD_VAR copies)
self.count_expression(&tt.tag, ctx);
let quasi_count = tt.quasi.quasis.len();
// Each quasi: LOAD_CONST string + LOAD_CONST index + SET_ELEM
// for both cooked and raw arrays
for _ in 0..quasi_count {
ctx.alloc_reg(); // str_reg
ctx.projected_pc += 1; // LOAD_CONST string
ctx.alloc_reg(); // idx_reg
ctx.projected_pc += 1; // LOAD_CONST index
ctx.projected_pc += 1; // SET_ELEM (cooked)
}
// Cooked array: alloc + NEW_ARRAY
ctx.alloc_reg(); // cooked_temp
ctx.projected_pc += 1; // NEW_ARRAY
for _ in 0..quasi_count {
ctx.alloc_reg(); // str_reg
ctx.projected_pc += 1; // LOAD_CONST string
ctx.alloc_reg(); // idx_reg
ctx.projected_pc += 1; // LOAD_CONST index
ctx.projected_pc += 1; // SET_ELEM (raw)
}
// Raw array: alloc + NEW_ARRAY
ctx.alloc_reg(); // raw_temp
ctx.projected_pc += 1; // NEW_ARRAY
// Count expression arguments
for expr in &tt.quasi.expressions {
self.count_expression(expr, ctx);
}
// Consecutive arg slots: cooked_slot, raw_slot, N expr_slots
ctx.alloc_reg(); // cooked_slot
ctx.alloc_reg(); // raw_slot
for _ in &tt.quasi.expressions {
ctx.alloc_reg(); // expr_slot
ctx.projected_pc += 1; // LOAD_VAR
}
// LOAD_VAR for cooked and raw
ctx.projected_pc += 2;
// undefined this arg
ctx.alloc_reg();
ctx.projected_pc += 1; // LOAD_CONST
// CALL + ext word
ctx.projected_pc += 2;
// Result reg + LOAD_VAR
ctx.alloc_reg();
ctx.projected_pc += 1; // LOAD_VAR
}
Expression::ArrowFunctionExpression(_arrow) => {
// Arrow functions: alloc 1 register for the function value.
// Body is compiled in the emit pass only (same pattern as FE).
ctx.alloc_reg();
ctx.projected_pc += 1; // LOAD_CONST
}
Expression::FunctionExpression(_fe) => {
// No hoisting - function created at expression position.
// Body is compiled in the emit pass only.
crates/oxide_compiler/src/emitter.rs
+286 -21
View File
@@ -2,7 +2,7 @@ use crate::compiler::Label;
use crate::opcode::{self, OpCode};
use oxide_parser::{
AssignmentOperator, Expression, ForStatementInit, ForStatementLeft, SimpleAssignmentTarget,
Statement, UnaryOperator, UpdateOperator,
Statement, UnaryOperator, UpdateOperator, VariableDeclarationKind,
};
use crate::compiler::{is_int_literal, is_side_effect_free, BinaryOperator, CompileCtx, Compiler};
@@ -25,12 +25,24 @@ impl Compiler {
oxide_parser::BindingPattern::BindingIdentifier(bi) => bi.name.as_str(),
_ => return Err("destructuring not supported".into()),
};
let is_const = matches!(decl.kind, VariableDeclarationKind::Const);
if is_const && d.init.is_none() {
return Err("const declaration must have an initializer".into());
}
let var_reg = ctx.alloc_reg();
ctx.declare(name, var_reg)?;
ctx.declare(name, var_reg, decl.kind, is_const)?;
if let Some(init) = &d.init {
let val_reg = self.emit_expression(init, ctx)?;
ctx.emit(opcode::encode(OpCode::STORE_VAR, var_reg, val_reg, 0));
let const_flag = if is_const { 1 } else { 0 };
ctx.emit(opcode::encode(OpCode::STORE_VAR, var_reg, val_reg, const_flag));
ctx.init_var(name);
// Name inference (D-04): if the initializer is an arrow function,
// set the compiled sub_module's function_name.
if matches!(*init, Expression::ArrowFunctionExpression(_)) {
if let Some(sub_mod) = ctx.sub_modules.last_mut() {
sub_mod.function_name = Some(name.to_string());
}
}
r = Some(val_reg);
} else {
let idx = ctx.add_constant(Constant::Undefined);
@@ -180,7 +192,7 @@ impl Compiler {
_ => return Err("destructuring not supported".into()),
};
let var_reg = ctx.alloc_reg();
ctx.declare(name, var_reg)?;
ctx.declare(name, var_reg, decl.kind, matches!(decl.kind, VariableDeclarationKind::Const))?;
if let Some(init_expr) = &d.init {
let val_reg = self.emit_expression(init_expr, ctx)?;
ctx.emit(opcode::encode(OpCode::STORE_VAR, var_reg, val_reg, 0));
@@ -242,7 +254,7 @@ impl Compiler {
_ => return Err("destructuring not supported".into()),
};
let var_reg = ctx.alloc_reg();
ctx.declare(name, var_reg)?;
ctx.declare(name, var_reg, decl.kind, matches!(decl.kind, VariableDeclarationKind::Const))?;
ctx.emit(opcode::encode(OpCode::STORE_VAR, var_reg, key_reg, 0));
ctx.init_var(name);
}
@@ -350,7 +362,8 @@ impl Compiler {
};
// Compile body into sub-module
let sub_module = self.compile_function_body(&param_names, body_stmts, ctx)?;
let sub_module =
self.compile_function_body(&param_names, body_stmts, ctx, false)?;
ctx.sub_modules.push(sub_module);
// 1-indexed: 0 = no sub_module (sentinel)
let sub_idx = ctx.sub_modules.len() as u32;
@@ -437,7 +450,12 @@ impl Compiler {
let catch_reg = ctx.alloc_reg();
if let oxide_parser::BindingPattern::BindingIdentifier(bi) = &param.pattern
{
ctx.declare_initialized(bi.name.as_str(), catch_reg)?;
ctx.declare_initialized(
bi.name.as_str(),
catch_reg,
VariableDeclarationKind::Let,
false,
)?;
ctx.emit(opcode::encode(OpCode::STORE_VAR, catch_reg, 0, 0));
}
}
@@ -567,6 +585,7 @@ impl Compiler {
BinaryOperator::LessEqualThan => OpCode::LTE,
BinaryOperator::GreaterEqualThan => OpCode::GTE,
BinaryOperator::In => OpCode::IN,
BinaryOperator::Instanceof => OpCode::INSTANCEOF,
BinaryOperator::StrictEquality => OpCode::STRICT_EQ,
BinaryOperator::StrictInequality => OpCode::STRICT_NEQ,
_ => return Err(format!("unsupported binary operator: {:?}", bin.operator)),
@@ -603,6 +622,30 @@ impl Compiler {
ctx.emit(opcode::encode(OpCode::UNARY_PLUS, r, arg, 0));
Ok(r)
}
UnaryOperator::Delete => {
match &un.argument {
Expression::Identifier(_) => {
Err("delete of global variable is not allowed in strict mode".into())
}
Expression::StaticMemberExpression(member) => {
let obj_reg = self.emit_expression(&member.object, ctx)?;
let prop_name = member.property.name.as_str();
let const_idx = ctx.add_constant(Constant::String(prop_name.to_string()));
let r = ctx.alloc_reg();
ctx.emit(opcode::encode(OpCode::DELETE_PROP_STATIC, r, obj_reg, 0));
ctx.emit(const_idx as u32);
Ok(r)
}
Expression::ComputedMemberExpression(member) => {
let obj_reg = self.emit_expression(&member.object, ctx)?;
let key_reg = self.emit_expression(&member.expression, ctx)?;
let r = ctx.alloc_reg();
ctx.emit(opcode::encode(OpCode::DELETE_PROP_DYNAMIC, r, obj_reg, key_reg));
Ok(r)
}
_ => Err("invalid delete target".into()),
}
}
_ => Err(format!("unsupported unary operator: {:?}", un.operator)),
}
}
@@ -731,6 +774,13 @@ impl Compiler {
((idx >> 8) & 0xFF) as u8,
));
let val_reg = self.emit_expression(&p.value, ctx)?;
// Name inference (D-04): if property value is an arrow function,
// set the compiled sub_module's function_name to the property key.
if matches!(&p.value, Expression::ArrowFunctionExpression(_)) {
if let Some(sub_mod) = ctx.sub_modules.last_mut() {
sub_mod.function_name = Some(prop_name.to_string());
}
}
ctx.emit(opcode::encode(OpCode::SET_PROP, obj_reg, val_reg, key_reg));
}
Ok(obj_reg)
@@ -850,7 +900,9 @@ impl Compiler {
let val_reg = self.emit_expression(&assign.right, ctx)?;
let name = id_ref.name.as_str();
let var_reg = ctx.lookup_or_global(name);
ctx.emit(opcode::encode(OpCode::STORE_VAR, var_reg, val_reg, 0));
let is_const = ctx.lookup_const_flag(name);
let const_flag = if is_const { 1 } else { 0 };
ctx.emit(opcode::encode(OpCode::STORE_VAR, var_reg, val_reg, const_flag));
Ok(val_reg)
}
} else {
@@ -912,6 +964,226 @@ impl Compiler {
ctx.emit(opcode::encode(OpCode::LOAD_VAR, r, var_reg, 0));
Ok(r)
}
// TemplateLiteral: interleaved quasis + expressions via TEMPLATE_STR opcode (D-07)
Expression::TemplateLiteral(tl) => {
let r = ctx.alloc_reg();
let quasis = &tl.quasis;
let expressions = &tl.expressions;
let segment_count = quasis.len() + expressions.len();
// Evaluate each expression, collecting registers
let expr_regs: Vec<u8> = expressions
.iter()
.map(|e| self.emit_expression(e, ctx))
.collect::<Result<Vec<_>, _>>()?;
// Add each quasi string to constant pool
let quasi_const_idxs: Vec<u16> = quasis
.iter()
.map(|q| {
let s = q
.value
.cooked
.as_ref()
.map(|c| c.to_string())
.unwrap_or_default();
ctx.add_constant(Constant::String(s))
})
.collect();
// Compute total length hint
let total_len_hint: usize = quasis
.iter()
.map(|q| q.value.cooked.as_ref().map(|c| c.len()).unwrap_or(0))
.sum();
// Emit TEMPLATE_STR rd, 0, 0
ctx.emit(opcode::encode(OpCode::TEMPLATE_STR, r, 0, 0));
// Ext word 0: (segment_count << 16) | (total_len_hint & 0xFFFF)
ctx.emit(((segment_count as u32) << 16) | (total_len_hint as u32 & 0xFFFF));
// Interleave segments: quasi[0], expr[0], quasi[1], expr[1], ...
let mut expr_iter = expr_regs.iter();
for const_idx in quasi_const_idxs.iter() {
// Quasi: is_expression=0, bits 0-15 = const_idx
ctx.emit(*const_idx as u32 & 0x7FFF_FFFF);
// Expression (if any remaining)
if let Some(expr_reg) = expr_iter.next() {
// Expression: is_expression=1, bits 0-15 = reg
ctx.emit(0x8000_0000u32 | (*expr_reg as u32));
}
}
Ok(r)
}
// TaggedTemplateExpression: tag`str ${expr}` => CALL(tag, undefined, cooked_array, raw_array, ...exprs) (D-08)
Expression::TaggedTemplateExpression(tt) => {
let quasis = &tt.quasi.quasis;
let expressions = &tt.quasi.expressions;
// 1. Evaluate tag expression
let tag_reg = self.emit_expression(&tt.tag, ctx)?;
// 2. Build cooked strings array (into a temp register)
let cooked_temp = ctx.alloc_reg();
ctx.emit(opcode::encode(
OpCode::NEW_ARRAY,
cooked_temp,
quasis.len() as u8,
0,
));
for (i, quasi) in quasis.iter().enumerate() {
let s = quasi
.value
.cooked
.as_ref()
.map(|c| c.to_string())
.unwrap_or_default();
let const_idx = ctx.add_constant(Constant::String(s));
let str_reg = ctx.alloc_reg();
ctx.emit(opcode::encode(
OpCode::LOAD_CONST,
str_reg,
(const_idx & 0xFF) as u8,
((const_idx >> 8) & 0xFF) as u8,
));
let idx_const = ctx.add_constant(Constant::Int(i as i32));
let idx_reg = ctx.alloc_reg();
ctx.emit(opcode::encode(
OpCode::LOAD_CONST,
idx_reg,
(idx_const & 0xFF) as u8,
((idx_const >> 8) & 0xFF) as u8,
));
ctx.emit(opcode::encode(
OpCode::SET_ELEM,
cooked_temp,
idx_reg,
str_reg,
));
}
// 3. Build raw strings array (into a temp register)
let raw_temp = ctx.alloc_reg();
ctx.emit(opcode::encode(
OpCode::NEW_ARRAY,
raw_temp,
quasis.len() as u8,
0,
));
for (i, quasi) in quasis.iter().enumerate() {
let raw = quasi.value.raw.to_string();
let const_idx = ctx.add_constant(Constant::String(raw));
let str_reg = ctx.alloc_reg();
ctx.emit(opcode::encode(
OpCode::LOAD_CONST,
str_reg,
(const_idx & 0xFF) as u8,
((const_idx >> 8) & 0xFF) as u8,
));
let idx_const = ctx.add_constant(Constant::Int(i as i32));
let idx_reg = ctx.alloc_reg();
ctx.emit(opcode::encode(
OpCode::LOAD_CONST,
idx_reg,
(idx_const & 0xFF) as u8,
((idx_const >> 8) & 0xFF) as u8,
));
ctx.emit(opcode::encode(OpCode::SET_ELEM, raw_temp, idx_reg, str_reg));
}
// 4. Evaluate expression arguments (into temp registers)
let mut expr_temps = Vec::new();
for expr in expressions {
expr_temps.push(self.emit_expression(expr, ctx)?);
}
// 5. Allocate consecutive argument slots: cooked, raw, expr[0], expr[1], ...
let cooked_slot = ctx.alloc_reg();
let raw_slot = ctx.alloc_reg();
let mut expr_slots = Vec::new();
for _ in expressions {
expr_slots.push(ctx.alloc_reg());
}
// Copy temps to consecutive slots using LOAD_VAR (register-to-register move)
ctx.emit(opcode::encode(
OpCode::LOAD_VAR,
cooked_slot,
cooked_temp,
0,
));
ctx.emit(opcode::encode(OpCode::LOAD_VAR, raw_slot, raw_temp, 0));
for (slot, temp) in expr_slots.iter().zip(expr_temps.iter()) {
ctx.emit(opcode::encode(OpCode::LOAD_VAR, *slot, *temp, 0));
}
// 6. Emit undefined as this_arg
let undef_idx = ctx.add_constant(Constant::Undefined);
let undef_reg = ctx.alloc_reg();
ctx.emit(opcode::encode(
OpCode::LOAD_CONST,
undef_reg,
(undef_idx & 0xFF) as u8,
((undef_idx >> 8) & 0xFF) as u8,
));
// 7. Emit CALL(tag, undefined, cooked_slot)
let arg_count = 2 + expressions.len();
ctx.emit(opcode::encode(
OpCode::CALL,
tag_reg,
undef_reg,
cooked_slot,
));
ctx.emit(arg_count as u32);
// 8. Result from regs[0]
let result_reg = ctx.alloc_reg();
ctx.emit(opcode::encode(OpCode::LOAD_VAR, result_reg, 0, 0));
Ok(result_reg)
}
// ArrowFunctionExpression: compile body, capture lexical this (D-01)
// Name inference (D-04) happens at assignment site - see VariableDeclaration/ObjectProperty.
Expression::ArrowFunctionExpression(arrow) => {
// Rest params not yet supported (D-06 placeholder)
if let Some(_rest) = &arrow.params.rest {
return Err("rest params in arrow functions not yet supported".into());
}
// Extract param names (same pattern as FunctionExpression)
let mut param_names = Vec::new();
for param in &arrow.params.items {
if let oxide_parser::BindingPattern::BindingIdentifier(bi) = &param.pattern {
param_names.push(bi.name.to_string());
}
}
// Expression body: pass body statements directly with is_expression_body=true.
// Statement body: pass body statements with is_expression_body=false.
let body_stmts = &arrow.body.statements;
let is_expr_body = arrow.expression;
let mut sub_module =
self.compile_function_body(&param_names, body_stmts, ctx, is_expr_body)?;
sub_module.is_arrow = true;
ctx.sub_modules.push(sub_module);
// 1-indexed: 0 = no sub_module (sentinel)
let sub_idx = ctx.sub_modules.len() as u32;
let const_idx = ctx.add_constant(Constant::BytecodeFunc(sub_idx));
let r = ctx.alloc_reg();
ctx.emit(opcode::encode(
OpCode::LOAD_CONST,
r,
(const_idx & 0xFF) as u8,
((const_idx >> 8) & 0xFF) as u8,
));
Ok(r)
}
Expression::FunctionExpression(fe) => {
// FunctionExpression: compile body, emit LOAD_CONST(BytecodeFunc)
let mut param_names = Vec::new();
@@ -927,7 +1199,8 @@ impl Compiler {
&[]
};
let sub_module = self.compile_function_body(&param_names, body_stmts, ctx)?;
let sub_module =
self.compile_function_body(&param_names, body_stmts, ctx, false)?;
ctx.sub_modules.push(sub_module);
// 1-indexed: 0 = no sub_module (sentinel)
let sub_idx = ctx.sub_modules.len() as u32;
@@ -1048,10 +1321,8 @@ impl Compiler {
let last_slash = raw_str.rfind('/').unwrap_or(raw_str.len() - 1);
let pattern = &raw_str[1..last_slash];
let flags = &raw_str[last_slash + 1..];
let ci = ctx.add_constant(Constant::RegExp(
pattern.to_string(),
flags.to_string(),
));
let ci = ctx
.add_constant(Constant::RegExp(pattern.to_string(), flags.to_string()));
let r = ctx.alloc_reg();
ctx.emit(opcode::encode(
OpCode::LOAD_CONST,
@@ -1061,16 +1332,10 @@ impl Compiler {
));
Ok(r)
} else {
Err(format!(
"unsupported expression type: {:?}",
expr
))
Err(format!("unsupported expression type: {:?}", expr))
}
} else {
Err(format!(
"unsupported expression type: {:?}",
expr
))
Err(format!("unsupported expression type: {:?}", expr))
}
}
_ => Err(format!("unsupported expression type: {:?}", expr)),
crates/oxide_compiler/src/hash.rs
+24 -1
View File
@@ -21,7 +21,7 @@ fn hash_statement(stmt: &Statement, h: &mut rustc_hash::FxHasher) {
hash_expression(&es.expression, h);
}
Statement::VariableDeclaration(decl) => {
1u8.hash(h);
std::mem::discriminant(&decl.kind).hash(h);
(decl.declarations.len() as u32).hash(h);
for d in &decl.declarations {
if let Some(init) = &d.init {
@@ -54,6 +54,7 @@ fn hash_statement(stmt: &Statement, h: &mut rustc_hash::FxHasher) {
if let Some(expr) = init.as_expression() {
hash_expression(expr, h);
} else if let ForStatementInit::VariableDeclaration(decl) = init {
std::mem::discriminant(&decl.kind).hash(h);
(decl.declarations.len() as u32).hash(h);
for d in &decl.declarations {
if let Some(init_expr) = &d.init {
@@ -224,6 +225,28 @@ fn hash_expression(expr: &Expression, h: &mut rustc_hash::FxHasher) {
_ => {}
}
}
Expression::TemplateLiteral(tl) => {
16u8.hash(h);
(tl.quasis.len() as u32).hash(h);
for expr in &tl.expressions {
hash_expression(expr, h);
}
}
Expression::TaggedTemplateExpression(tt) => {
17u8.hash(h);
hash_expression(&tt.tag, h);
(tt.quasi.quasis.len() as u32).hash(h);
for expr in &tt.quasi.expressions {
hash_expression(expr, h);
}
}
Expression::ArrowFunctionExpression(arrow) => {
15u8.hash(h);
(arrow.params.items.len() as u32).hash(h);
for s in &arrow.body.statements {
hash_statement(s, h);
}
}
Expression::FunctionExpression(fe) => {
13u8.hash(h);
(fe.params.items.len() as u32).hash(h);
crates/oxide_compiler/src/module.rs
+15
View File
@@ -21,6 +21,15 @@ pub struct CompiledModule {
pub n_args: u8,
pub builtin_reg_map: Vec<(String, u8)>,
pub sub_modules: Vec<CompiledModule>,
/// True when this module is an arrow function body (D-01).
/// Arrow functions capture lexical `this` from the enclosing scope.
pub is_arrow: bool,
/// Index into `constants` holding the captured `this` JsValue.
/// 0 means "not captured - use standard this binding".
pub captured_this_const_idx: u16,
/// Function name inferred from assignment context (D-04).
/// Set at the VariableDeclaration / ObjectProperty assignment site.
pub function_name: Option<String>,
}
impl CompiledModule {
@@ -32,6 +41,9 @@ impl CompiledModule {
n_args: 0,
builtin_reg_map: Vec::new(),
sub_modules: Vec::new(),
is_arrow: false,
captured_this_const_idx: 0,
function_name: None,
}
}
}
@@ -51,6 +63,9 @@ impl Clone for CompiledModule {
n_args: self.n_args,
builtin_reg_map: self.builtin_reg_map.clone(),
sub_modules: self.sub_modules.clone(),
is_arrow: self.is_arrow,
captured_this_const_idx: self.captured_this_const_idx,
function_name: self.function_name.clone(),
}
}
}
crates/oxide_compiler/src/opcode.rs
+16
View File
@@ -66,6 +66,14 @@ pub enum OpCode {
FOR_OF_DONE = 0x36,
FOR_OF_CLOSE = 0x37,
// -- Template Literal (0x38) --
TEMPLATE_STR = 0x38,
// -- Small Language Features (0x39-0x3B) --
DELETE_PROP_STATIC = 0x39,
DELETE_PROP_DYNAMIC = 0x3A,
INSTANCEOF = 0x3B,
// -- Variable (0x30-0x32) --
LOAD_VAR = 0x30,
STORE_VAR = 0x31,
@@ -201,6 +209,10 @@ impl TryFrom<u8> for OpCode {
0x35 => Ok(OpCode::TRY_FINALLY_END),
0x36 => Ok(OpCode::FOR_OF_DONE),
0x37 => Ok(OpCode::FOR_OF_CLOSE),
0x38 => Ok(OpCode::TEMPLATE_STR),
0x39 => Ok(OpCode::DELETE_PROP_STATIC),
0x3A => Ok(OpCode::DELETE_PROP_DYNAMIC),
0x3B => Ok(OpCode::INSTANCEOF),
0x40 => Ok(OpCode::CALL),
0x41 => Ok(OpCode::RETURN),
0x42 => Ok(OpCode::CALL_NATIVE),
@@ -288,6 +300,10 @@ impl fmt::Display for OpCode {
OpCode::TRY_FINALLY_END => "TRY_FINALLY_END",
OpCode::FOR_OF_DONE => "FOR_OF_DONE",
OpCode::FOR_OF_CLOSE => "FOR_OF_CLOSE",
OpCode::TEMPLATE_STR => "TEMPLATE_STR",
OpCode::DELETE_PROP_STATIC => "DELETE_PROP_STATIC",
OpCode::DELETE_PROP_DYNAMIC => "DELETE_PROP_DYNAMIC",
OpCode::INSTANCEOF => "INSTANCEOF",
OpCode::LOAD_VAR => "LOAD_VAR",
OpCode::STORE_VAR => "STORE_VAR",
OpCode::LOAD_CONST => "LOAD_CONST",
crates/oxide_compiler/src/symbol_table.rs
+173 -31
View File
@@ -1,12 +1,26 @@
use std::collections::HashMap;
use oxide_parser::VariableDeclarationKind;
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub(crate) enum ScopeKind {
FunctionScope,
BlockScope,
}
pub(crate) struct Scope {
pub(crate) bindings: HashMap<String, Binding>,
pub(crate) kind: ScopeKind,
}
pub(crate) struct Binding {
pub(crate) reg: u8,
pub(crate) initialized: bool,
pub(crate) is_const: bool,
}
pub struct SymbolTable {
pub(crate) scopes: Vec<HashMap<String, Binding>>,
pub(crate) scopes: Vec<Scope>,
}
impl Default for SymbolTable {
@@ -18,28 +32,65 @@ impl Default for SymbolTable {
impl SymbolTable {
pub fn new() -> Self {
Self {
scopes: vec![HashMap::new()],
scopes: vec![Scope {
bindings: HashMap::new(),
kind: ScopeKind::FunctionScope,
}],
}
}
pub fn push_scope(&mut self) {
self.scopes.push(HashMap::new());
self.scopes.push(Scope {
bindings: HashMap::new(),
kind: ScopeKind::BlockScope,
});
}
pub(crate) fn push_scope_with_kind(&mut self, kind: ScopeKind) {
self.scopes.push(Scope {
bindings: HashMap::new(),
kind,
});
}
pub fn pop_scope(&mut self) {
self.scopes.pop();
if self.scopes.len() > 1 {
self.scopes.pop();
}
}
pub fn declare(&mut self, name: &str, reg: u8) -> Result<(), String> {
let current = self.scopes.last_mut().unwrap();
if current.contains_key(name) {
fn find_var_target_scope(&self) -> usize {
for (i, scope) in self.scopes.iter().enumerate().rev() {
if scope.kind == ScopeKind::FunctionScope {
return i;
}
}
0
}
pub fn declare(
&mut self,
name: &str,
reg: u8,
kind: VariableDeclarationKind,
is_const: bool,
) -> Result<(), String> {
let target_idx = if matches!(kind, VariableDeclarationKind::Var) {
self.find_var_target_scope()
} else {
self.scopes.len() - 1
};
let target = &mut self.scopes[target_idx];
if target.bindings.contains_key(name) {
return Err(format!("Identifier '{name}' has already been declared"));
}
current.insert(
target.bindings.insert(
name.to_string(),
Binding {
reg,
initialized: false,
is_const: matches!(kind, VariableDeclarationKind::Const) || is_const,
},
);
Ok(())
@@ -47,7 +98,7 @@ impl SymbolTable {
pub fn lookup(&self, name: &str) -> Result<u8, String> {
for scope in self.scopes.iter().rev() {
if let Some(b) = scope.get(name) {
if let Some(b) = scope.bindings.get(name) {
if b.initialized {
return Ok(b.reg);
}
@@ -59,49 +110,79 @@ impl SymbolTable {
pub fn lookup_or_global(&mut self, name: &str, reg_for_new: u8) -> u8 {
for scope in self.scopes.iter().rev() {
if let Some(b) = scope.get(name) {
if let Some(b) = scope.bindings.get(name) {
return b.reg;
}
}
self.scopes[0].insert(
self.scopes[0].bindings.insert(
name.to_string(),
Binding {
reg: reg_for_new,
initialized: true,
is_const: false,
},
);
reg_for_new
}
/// Declare a variable that is already initialized (for FunctionDeclaration hoisting).
/// If the name already exists in the current scope, just mark it as initialized.
pub fn declare_initialized(&mut self, name: &str, reg: u8) -> Result<(), String> {
let current = self.scopes.last_mut().unwrap();
if let Some(b) = current.get_mut(name) {
pub fn lookup_is_const(&self, name: &str) -> bool {
for scope in self.scopes.iter().rev() {
if let Some(b) = scope.bindings.get(name) {
if b.initialized {
return b.is_const;
}
return false;
}
}
false
}
pub fn declare_initialized(
&mut self,
name: &str,
reg: u8,
kind: VariableDeclarationKind,
is_const: bool,
) -> Result<(), String> {
let target_idx = if matches!(kind, VariableDeclarationKind::Var) {
self.find_var_target_scope()
} else {
self.scopes.len() - 1
};
let target = &mut self.scopes[target_idx];
if let Some(b) = target.bindings.get_mut(name) {
b.initialized = true;
return Ok(());
}
current.insert(
target.bindings.insert(
name.to_string(),
Binding {
reg,
initialized: true,
is_const: matches!(kind, VariableDeclarationKind::Const) || is_const,
},
);
Ok(())
}
pub fn pre_register_global(&mut self, name: &str, reg: u8) {
self.scopes[0].entry(name.to_string()).or_insert(Binding {
reg,
initialized: true,
});
self.scopes[0]
.bindings
.entry(name.to_string())
.or_insert(Binding {
reg,
initialized: true,
is_const: false,
});
}
pub fn init_var(&mut self, name: &str) {
let current = self.scopes.last_mut().unwrap();
if let Some(b) = current.get_mut(name) {
b.initialized = true;
for scope in self.scopes.iter_mut().rev() {
if let Some(b) = scope.bindings.get_mut(name) {
b.initialized = true;
return;
}
}
}
}
@@ -109,6 +190,17 @@ impl SymbolTable {
#[cfg(test)]
mod tests {
use super::SymbolTable;
use oxide_parser::VariableDeclarationKind;
fn v() -> VariableDeclarationKind {
VariableDeclarationKind::Var
}
fn l() -> VariableDeclarationKind {
VariableDeclarationKind::Let
}
fn c() -> VariableDeclarationKind {
VariableDeclarationKind::Const
}
#[test]
fn global_scope_exists() {
@@ -119,7 +211,7 @@ mod tests {
#[test]
fn declare_and_lookup() {
let mut st = SymbolTable::new();
st.declare("x", 0).unwrap();
st.declare("x", 0, l(), false).unwrap();
st.init_var("x");
assert_eq!(st.lookup("x").unwrap(), 0);
}
@@ -127,7 +219,7 @@ mod tests {
#[test]
fn tdz_error() {
let mut st = SymbolTable::new();
st.declare("x", 0).unwrap();
st.declare("x", 0, l(), false).unwrap();
assert!(st
.lookup("x")
.unwrap_err()
@@ -137,17 +229,17 @@ mod tests {
#[test]
fn duplicate_declaration_error() {
let mut st = SymbolTable::new();
st.declare("x", 0).unwrap();
assert!(st.declare("x", 1).is_err());
st.declare("x", 0, l(), false).unwrap();
assert!(st.declare("x", 1, l(), false).is_err());
}
#[test]
fn nested_scopes_shadow() {
let mut st = SymbolTable::new();
st.declare("x", 0).unwrap();
st.declare("x", 0, l(), false).unwrap();
st.init_var("x");
st.push_scope();
st.declare("x", 1).unwrap();
st.declare("x", 1, l(), false).unwrap();
st.init_var("x");
assert_eq!(st.lookup("x").unwrap(), 1);
st.pop_scope();
@@ -165,9 +257,59 @@ mod tests {
#[test]
fn lookup_or_global_existing() {
let mut st = SymbolTable::new();
st.declare("x", 3).unwrap();
st.declare("x", 3, l(), false).unwrap();
st.init_var("x");
let reg = st.lookup_or_global("x", 99);
assert_eq!(reg, 3);
}
#[test]
fn var_hoists_to_function_scope() {
let mut st = SymbolTable::new();
// Global scope is FunctionScope
st.declare("x", 0, l(), false).unwrap();
st.init_var("x");
// Push a block scope
st.push_scope();
// var declaration inside block should go to function scope
st.declare("y", 1, v(), false).unwrap();
st.init_var("y");
st.pop_scope();
// y should be accessible (it was declared in function scope, not block scope)
assert_eq!(st.lookup("y").unwrap(), 1);
}
#[test]
fn let_block_scoped() {
let mut st = SymbolTable::new();
st.declare("x", 0, l(), false).unwrap();
st.init_var("x");
st.push_scope();
st.declare("x", 1, l(), false).unwrap();
st.init_var("x");
assert_eq!(st.lookup("x").unwrap(), 1);
st.pop_scope();
assert_eq!(st.lookup("x").unwrap(), 0);
}
#[test]
fn const_has_is_const_flag() {
let mut st = SymbolTable::new();
st.declare("x", 0, c(), false).unwrap();
st.init_var("x");
let reg = st.lookup("x").unwrap();
assert_eq!(reg, 0);
}
#[test]
fn var_in_two_blocks_same_function_scope_is_duplicate() {
let mut st = SymbolTable::new();
st.push_scope();
st.declare("y", 1, v(), false).unwrap();
st.pop_scope();
st.push_scope();
// Same function scope, so this should be a duplicate
assert!(st.declare("y", 2, v(), false).is_err());
st.pop_scope();
}
}
crates/oxide_compiler/tests/arrow_template_tests.rs
+129
View File
@@ -0,0 +1,129 @@
use oxide_compiler::compiler::Compiler;
use oxide_parser::Allocator;
fn parse_to_hash(source: &str) -> u64 {
let allocator = Allocator::default();
let program = oxide_parser::parse(&allocator, source).expect("parse failed");
oxide_compiler::compiler::structural_hash(&program)
}
fn compile_source(source: &str) -> oxide_compiler::module::CompiledModule {
let allocator = Allocator::default();
let program = oxide_parser::parse(&allocator, source).expect("parse failed");
let compiler = Compiler::new();
compiler.compile(&program).expect("compile failed")
}
// -- Arrow function structural hash tests --
#[test]
fn hash_arrow_expression_body() {
// Expression-body arrows at top level compile successfully
let hash = parse_to_hash("var f = () => 42;");
assert!(hash != 0, "arrow function should produce a non-zero hash");
}
#[test]
fn hash_arrow_different_params() {
let hash_a = parse_to_hash("var f = (x) => x;");
let hash_b = parse_to_hash("var f = (x, y) => x;");
assert_ne!(
hash_a, hash_b,
"different param counts must produce different hashes"
);
}
#[test]
fn hash_arrow_vs_regular_function() {
let hash_a = parse_to_hash("var f = () => 42;");
let hash_b = parse_to_hash("var f = function() { return 42; };");
assert_ne!(
hash_a, hash_b,
"arrow and regular functions must have different hashes"
);
}
#[test]
fn hash_arrow_block_body() {
let hash = parse_to_hash("var f = (a, b) => { return a + b; };");
assert!(
hash != 0,
"arrow with block body should produce a non-zero hash"
);
}
#[test]
fn hash_arrow_same_shape() {
// Same structural shape: different variable name, same arrow expression
let hash_a = parse_to_hash("var f = () => 1 + 2;");
let hash_b = parse_to_hash("var g = () => 1 + 2;");
assert_eq!(
hash_a, hash_b,
"same-shaped arrow functions should have same hash"
);
}
// -- Arrow function compilation tests --
#[test]
fn compile_arrow_expression_body() {
let module = compile_source("var f = () => 42; f();");
// Verify the sub_module for the arrow is marked as is_arrow
let arrow_found = module.sub_modules.iter().any(|m| m.is_arrow);
assert!(
arrow_found,
"arrow function sub_module should have is_arrow=true"
);
}
#[test]
fn compile_arrow_block_body() {
let module = compile_source("var f = (a, b) => { return a + b; }; f(1, 2);");
let arrow_found = module.sub_modules.iter().any(|m| m.is_arrow);
assert!(
arrow_found,
"arrow with block body should have is_arrow=true"
);
}
#[test]
fn compile_arrow_name_inference() {
let module = compile_source("var myArrow = () => 42;");
// The sub_module for the arrow should have function_name set
let named = module
.sub_modules
.iter()
.any(|m| m.is_arrow && m.function_name.as_deref() == Some("myArrow"));
assert!(
named,
"arrow function should have function_name='myArrow' from D-04 inference"
);
}
#[test]
fn compile_regular_function_not_arrow() {
let module = compile_source("var f = function() { return 42; }; f();");
// Regular FunctionExpression should NOT have is_arrow=true
let has_arrow = module.sub_modules.iter().any(|m| m.is_arrow);
assert!(
!has_arrow,
"regular function expression should not be marked as arrow"
);
}
#[test]
fn compile_arrow_single_param_no_parens() {
let module = compile_source("var double = x => x * 2; double(5);");
let arrow_found = module.sub_modules.iter().any(|m| m.is_arrow);
assert!(
arrow_found,
"single-param arrow without parens should compile"
);
}
#[test]
fn compile_arrow_multiple_params_with_parens() {
let module = compile_source("var sum = (a, b) => a + b; sum(1, 2);");
let arrow_found = module.sub_modules.iter().any(|m| m.is_arrow);
assert!(arrow_found, "multi-param arrow with parens should compile");
}
crates/oxide_compiler/tests/let_const_tests.rs
+19
View File
@@ -0,0 +1,19 @@
use oxide_compiler::compiler::Compiler;
#[test]
fn hash_var_let_const_differ() {
let compiler = Compiler::new();
let allocator = oxide_parser::Allocator::default();
let var_ast = oxide_parser::parse(&allocator, "var x = 1").unwrap();
let let_ast = oxide_parser::parse(&allocator, "let x = 1").unwrap();
let const_ast = oxide_parser::parse(&allocator, "const x = 1").unwrap();
// Different AST structures should produce different bytecode
let var_module = compiler.compile(&var_ast).unwrap();
let let_module = compiler.compile(&let_ast).unwrap();
let const_module = compiler.compile(&const_ast).unwrap();
assert_eq!(var_module.n_registers, let_module.n_registers);
assert_eq!(let_module.n_registers, const_module.n_registers);
}
crates/oxide_types/src/object.rs
+30 -1
View File
@@ -2,9 +2,10 @@ use crate::value::JsValue;
pub type ShapeId = u32;
/// Layout (48B):
/// Layout (56B):
/// header: u32 bits
/// [0:23] shape_id
/// [28] is_arrow
/// [29] is_array
/// [30] is_extensible
/// [31] is_function
@@ -14,6 +15,7 @@ pub type ShapeId = u32;
/// generation: u32 (4 bytes + 4 pad)
/// native_fn: u64 (8 bytes, 0 = None sentinel)
/// sub_module_index: u32 (4 bytes + 4 pad, index into CompiledModule.sub_modules)
/// captured_this: JsValue (8 bytes, lexical this for arrow functions)
#[repr(C)]
pub struct JsObject {
header: u32,
@@ -26,6 +28,7 @@ pub struct JsObject {
native_fn: u64,
sub_module_index: u32,
_pad3: [u8; 4],
captured_this: JsValue,
}
impl JsObject {
@@ -41,6 +44,7 @@ impl JsObject {
native_fn: 0,
sub_module_index: 0,
_pad3: [0; 4],
captured_this: JsValue::undefined(),
}
}
@@ -61,6 +65,7 @@ impl JsObject {
native_fn: 0,
sub_module_index: 0,
_pad3: [0; 4],
captured_this: JsValue::undefined(),
};
let vec = Box::new(vec![Box::new(JsValue::undefined()); n_elements]);
obj.hash_props = Box::into_raw(vec) as *mut u8;
@@ -261,6 +266,30 @@ impl JsObject {
pub fn set_sub_module_index(&mut self, idx: u32) {
self.sub_module_index = idx;
}
/// Arrow function flag (header bit 28).
/// When true, CALL dispatch captures lexical `this` from creation time.
pub fn is_arrow(&self) -> bool {
(self.header >> 28) & 1 != 0
}
pub fn set_arrow(&mut self, v: bool) {
if v {
self.header |= 1 << 28;
} else {
self.header &= !(1 << 28);
}
}
/// Lexical `this` captured at arrow function creation time.
/// Only meaningful when `is_arrow()` returns true.
pub fn captured_this(&self) -> JsValue {
self.captured_this
}
pub fn set_captured_this(&mut self, v: JsValue) {
self.captured_this = v;
}
}
#[cfg(test)]
crates/oxide_vm/src/vm.rs
+198 -11
View File
@@ -297,12 +297,19 @@ impl Vm {
}
/// Create a function JsObject for a BytecodeFunc constant.
fn create_function_object(&mut self, sub_idx: u32) -> JsValue {
/// When `is_arrow` is true, captures the current `this` (regs[254])
/// for lexical this binding at call time (D-01).
fn create_function_object(&mut self, sub_idx: u32, is_arrow: bool) -> JsValue {
let func_proto_ptr = self.kernel.builtin_world().function_proto.as_ptr() as *mut JsObject;
let proto_val = JsValue::from_js_object(func_proto_ptr);
let mut obj = JsObject::new_empty(EMPTY_SHAPE_ID, proto_val);
obj.set_function(true);
obj.set_sub_module_index(sub_idx);
if is_arrow {
obj.set_arrow(true);
// Capture lexical `this` from the enclosing scope (regs[254]).
obj.set_captured_this(self.regs[254]);
}
let obj_ptr = self.epoch.alloc(obj);
JsValue::object(obj_ptr as *mut u8)
}
@@ -319,14 +326,24 @@ impl Vm {
Constant::Boolean(b) => JsValue::bool(*b),
Constant::Null => JsValue::null(),
Constant::Undefined => JsValue::undefined(),
Constant::BytecodeFunc(idx) => self.create_function_object(*idx),
Constant::BytecodeFunc(idx) => {
// 1-indexed: idx 1 = sub_modules[0], idx 0 = sentinel
let sub_idx = *idx as usize;
let is_arrow = if sub_idx > 0 && sub_idx <= module.sub_modules.len() {
module.sub_modules[sub_idx - 1].is_arrow
} else {
false
};
self.create_function_object(*idx, is_arrow)
}
Constant::RegExp(pattern, flags) => {
let pat_si = self.kernel.string_forge().intern(pattern).0;
let flags_si = self.kernel.string_forge().intern(flags).0;
let pat_val = JsValue::string(pat_si, 0);
let flags_val = JsValue::string(flags_si, 0);
let native_fn = self.kernel.builtin_world().regexp_constructor.as_ptr() as *mut JsObject;
let native_fn =
self.kernel.builtin_world().regexp_constructor.as_ptr() as *mut JsObject;
let ctor = unsafe { &*native_fn };
let ctor_fn = ctor.native_fn();
if ctor_fn.is_none() {
@@ -338,7 +355,8 @@ impl Vm {
self.regs[0] = JsValue::undefined();
self.regs[1] = pat_val;
self.regs[2] = flags_val;
let func: crate::native::NativeFn = unsafe { std::mem::transmute(ctor_fn.unwrap()) };
let func: crate::native::NativeFn =
unsafe { std::mem::transmute(ctor_fn.unwrap()) };
let result = func(self, &[0, 1, 2]);
self.regs[0] = saved_0;
self.regs[1] = saved_1;
@@ -347,7 +365,7 @@ impl Vm {
Ok(val) => val,
Err(_) => JsValue::undefined(),
}
},
}
})
.collect()
}
@@ -654,6 +672,16 @@ impl Vm {
}
OpCode::STORE_VAR => {
if b != 0 {
// const guard: check if already initialized
if !self.regs[rd].is_undefined() {
throw_err!(
self,
TypeError,
"Assignment to constant variable"
);
}
}
self.regs[rd] = self.regs[a];
}
@@ -707,6 +735,7 @@ impl Vm {
let sub_constants = self.sub_modules[sub_idx].constants.clone();
let sub_builtin_count =
self.sub_modules[sub_idx].builtin_reg_map.len();
let sub_is_arrow = self.sub_modules[sub_idx].is_arrow;
// Copy args to regs[sub_builtin_count..sub_builtin_count+n_args]
// (builtins occupy regs[0..sub_builtin_count-1])
@@ -714,8 +743,13 @@ impl Vm {
let src_reg = first_arg_reg.wrapping_add(i as u8) as usize;
self.regs[sub_builtin_count + i] = self.regs[src_reg];
}
// Set this (reg 254 convention)
self.regs[254] = callee;
// Set this (reg 254 convention).
// Arrow functions use captured lexical `this` (D-01).
self.regs[254] = if sub_is_arrow {
obj.captured_this()
} else {
callee
};
// Save current bytecode/constants
self.saved_bytecode_stack
@@ -745,7 +779,15 @@ impl Vm {
Constant::Null => JsValue::null(),
Constant::Undefined => JsValue::undefined(),
Constant::BytecodeFunc(idx) => {
self.create_function_object(*idx)
let idx_usize = *idx as usize;
let nested_is_arrow = if idx_usize > 0
&& idx_usize <= self.sub_modules.len()
{
self.sub_modules[idx_usize - 1].is_arrow
} else {
false
};
self.create_function_object(*idx, nested_is_arrow)
}
Constant::RegExp(_, _) => JsValue::undefined(),
})
@@ -829,6 +871,14 @@ impl Vm {
"NEW_EXPRESSION: constructor is not a function"
);
}
// Arrow functions cannot be used as constructors (D-03)
if ctor_obj.is_arrow() {
throw_err!(
self,
TypeError,
"arrow functions cannot be used as constructors"
);
}
// Read extension word for arg_count
let ext = self.bytecode[self.pc];
@@ -1196,6 +1246,143 @@ impl Vm {
self.regs[rd] = JsValue::undefined();
}
OpCode::TEMPLATE_STR => {
// Read header ext word: (segment_count << 16) | (total_len_hint & 0xFFFF)
let header = self.bytecode[self.pc];
self.pc += 1;
let segment_count = (header >> 16) as usize;
let len_hint = (header & 0xFFFF) as usize;
// Build result string
let mut result = String::with_capacity(len_hint.max(16));
for _ in 0..segment_count {
let seg = self.bytecode[self.pc];
self.pc += 1;
if (seg >> 31) == 1 {
// Expression: register value
let reg = (seg & 0x7F) as u8;
let val = self.regs[reg as usize];
let s = if val.is_string() {
self.kernel()
.string_forge()
.lookup(val.as_string_index())
.unwrap_or_default()
} else {
format!("{}", val)
};
result.push_str(&s);
} else {
// Quasi: constant string
let const_idx = (seg & 0x7FFF_FFFF) as usize;
if const_idx < self.constants.len() {
let val = self.constants[const_idx];
if val.is_string() {
let s = self
.kernel()
.string_forge()
.lookup(val.as_string_index())
.unwrap_or_default();
result.push_str(&s);
}
}
}
}
let si = self.kernel.string_forge().intern(&result).0;
self.regs[rd] = JsValue::string(si, 0);
}
OpCode::DELETE_PROP_STATIC => {
let obj_val = self.regs[a];
if !obj_val.is_object() {
self.regs[rd] = JsValue::bool(true);
} else {
let obj_ptr = obj_val.as_js_object_ptr();
let obj = unsafe { &mut *obj_ptr };
let ext = self.bytecode[self.pc];
self.pc += 1;
let const_idx = ext as usize;
let prop_name_val = self.constants[const_idx];
if !prop_name_val.is_string() {
self.regs[rd] = JsValue::bool(true);
continue;
}
let prop_name_si = prop_name_val.as_string_index();
if let Some(pos) = self.kernel.shape_forge().lookup_position(
obj.shape_id(),
prop_name_si,
) {
obj.set_prop_at(pos, JsValue::undefined());
}
self.regs[rd] = JsValue::bool(true);
}
}
OpCode::DELETE_PROP_DYNAMIC => {
let obj_val = self.regs[a];
if !obj_val.is_object() {
self.regs[rd] = JsValue::bool(true);
} else {
let key_val = self.regs[b];
let prop_name_si = if key_val.is_string() {
key_val.as_string_index()
} else {
let s = crate::coercion::to_string(
self.kernel.string_forge().as_ref(),
key_val,
);
self.kernel.string_forge().intern(&s).0
};
let obj_ptr = obj_val.as_js_object_ptr();
let obj = unsafe { &mut *obj_ptr };
if let Some(pos) = self.kernel.shape_forge().lookup_position(
obj.shape_id(),
prop_name_si,
) {
obj.set_prop_at(pos, JsValue::undefined());
}
self.regs[rd] = JsValue::bool(true);
}
}
OpCode::INSTANCEOF => {
let lhs_val = self.regs[a];
let rhs_val = self.regs[b];
if !rhs_val.is_object() {
throw_err!(self, TypeError, "INSTANCEOF right-hand side is not callable");
}
if !lhs_val.is_object() {
self.regs[rd] = JsValue::bool(false);
continue;
}
let rhs_obj = unsafe { &*rhs_val.as_js_object_ptr() };
let proto_si = self.kernel.string_forge().intern("prototype").0;
let ctor_proto = self.resolve_property(rhs_obj, proto_si);
let ctor_proto_ptr = match ctor_proto {
Some(v) if v.is_object() => v.as_js_object_ptr(),
_ => {
self.regs[rd] = JsValue::bool(false);
continue;
}
};
let mut proto = unsafe { &*lhs_val.as_js_object_ptr() }.proto();
loop {
if !proto.is_object() {
self.regs[rd] = JsValue::bool(false);
break;
}
let proto_ptr = proto.as_js_object_ptr();
if proto_ptr == ctor_proto_ptr {
self.regs[rd] = JsValue::bool(true);
break;
}
proto = unsafe { &*proto_ptr }.proto();
}
}
OpCode::IN => {
let key_val = self.regs[a];
let obj_ptr = self.regs[b].as_object_ptr() as *mut JsObject;
@@ -1581,11 +1768,11 @@ impl Vm {
OpCode::FOR_OF_INIT => {}
OpCode::FOR_OF_NEXT => {},
OpCode::FOR_OF_NEXT => {}
OpCode::FOR_OF_DONE => {},
OpCode::FOR_OF_DONE => {}
OpCode::FOR_OF_CLOSE => {},
OpCode::FOR_OF_CLOSE => {}
OpCode::THROW => {
let exc_value = self.regs[rd];
crates/oxide_vm/tests/arrow_tests.rs
+125
View File
@@ -0,0 +1,125 @@
use oxide_compiler::compiler::Compiler;
use oxide_parser::Allocator;
use oxide_types::value::JsValue;
use oxide_vm::vm::Vm;
fn eval(source: &str) -> String {
let allocator = Allocator::default();
let program = match oxide_parser::parse(&allocator, source) {
Ok(p) => p,
Err(e) => return format!("parse error: {}", e[0].message),
};
let module = match Compiler::new().compile(&program) {
Ok(m) => m,
Err(e) => return format!("compile error: {}", e),
};
let mut vm = Vm::new();
match vm.run(&module) {
Ok(result) => format!("{}", result),
Err(e) => format!("vm error: {}", e),
}
}
fn eval_val(source: &str) -> (Vm, Result<JsValue, String>) {
let allocator = Allocator::default();
let program = match oxide_parser::parse(&allocator, source) {
Ok(p) => p,
Err(e) => return (Vm::new(), Err(format!("parse error: {}", e[0].message))),
};
let module = match Compiler::new().compile(&program) {
Ok(m) => m,
Err(e) => return (Vm::new(), Err(format!("compile error: {}", e))),
};
let mut vm = Vm::new();
let result = vm.run(&module);
(vm, result)
}
fn to_str(vm: &Vm, val: JsValue) -> String {
if val.is_string() {
vm.kernel()
.string_forge()
.lookup(val.as_string_index())
.unwrap_or_default()
} else {
format!("{}", val)
}
}
// -- Arrow function integration tests --
#[test]
fn arrow_expression_body_returns_value() {
assert_eq!(eval("(() => 42)()"), "42");
}
#[test]
fn arrow_block_body_returns_value() {
assert_eq!(eval("((a,b) => { return a+b; })(3,4)"), "7");
}
#[test]
fn arrow_single_param_no_parens() {
assert_eq!(eval("(x => x * 2)(5)"), "10");
}
#[test]
fn arrow_multiple_params_with_parens() {
assert_eq!(eval("((x, y) => x + y)(3, 7)"), "10");
}
#[test]
fn arrow_stored_in_variable_callable() {
assert_eq!(eval("var f = () => 99; f()"), "99");
}
#[test]
fn arrow_stored_in_variable_with_params() {
assert_eq!(eval("var add = (a,b) => a+b; add(10,20)"), "30");
}
#[test]
fn arrow_not_constructable_throws() {
let result = eval("new (() => {})");
assert!(
result.contains("TypeError") || result.contains("arrow"),
"Expected arrow constructor TypeError, got: {}",
result
);
}
#[test]
fn arrow_no_params_string_result() {
let (vm, result) = eval_val("(() => 'hello')()");
let s = to_str(&vm, result.unwrap());
assert_eq!(s, "hello");
}
#[test]
fn arrow_expression_body_implicit_return() {
assert_eq!(eval("(() => 1 + 2)()"), "3");
}
#[test]
fn arrow_block_body_needs_explicit_return() {
assert_eq!(eval("((a,b) => { a+b; })(3,4)"), "undefined");
}
#[test]
fn arrow_at_global_scope_this_is_undefined() {
assert_eq!(eval("(() => this)()"), "undefined");
}
#[test]
fn multiple_arrows_in_same_scope() {
assert_eq!(eval("var a = () => 1, b = () => 2; a() + b()"), "3");
}
// NOTE: Arrow functions capturing lexical `this` from enclosing functions
// require nested function call support (sub_module flattening), which is
// a pre-existing limitation. These tests will be enabled in a future phase:
//
// fn arrow_captures_enclosing_this() {
// // const o = {x:10, f:function(){ return (() => this.x)(); }}; o.f()
// // Expected: 10
// }
crates/oxide_vm/tests/builtins_error_tests.rs
+1 -1
View File
@@ -9,7 +9,7 @@ fn make_vm() -> Vm {
fn eval(source: &str) -> Result<JsValue, String> {
let allocator = oxide_parser::Allocator::default();
let program = oxide_parser::parse(&allocator, source).map_err(|e| format!("Parse: {}", e))?;
let program = oxide_parser::parse(&allocator, source).map_err(|e| format!("Parse: {:?}", e))?;
let module = Compiler::new().compile(&program).map_err(|e| format!("Compile: {}", e))?;
let mut vm = make_vm();
vm.run(&module)
crates/oxide_vm/tests/scoping_tests.rs
+62
View File
@@ -0,0 +1,62 @@
use oxide_compiler::compiler::Compiler;
use oxide_types::value::JsValue;
use oxide_vm::vm::Vm;
fn eval(source: &str) -> Result<JsValue, String> {
let allocator = oxide_parser::Allocator::default();
let program = oxide_parser::parse(&allocator, source).map_err(|e| format!("Parse: {:?}", e))?;
let module = Compiler::new().compile(&program).map_err(|e| format!("Compile: {}", e))?;
let mut vm = Vm::new();
vm.run(&module)
}
#[test]
fn let_block_scoping_outer_unchanged() {
let result = eval("let x = 1; { let x = 2; } x").unwrap();
assert_eq!(result.as_int(), 1);
}
#[test]
fn const_reassignment_throws() {
let result = eval("const x = 1; x = 2");
assert!(result.is_err());
let err = result.unwrap_err();
assert!(err.contains("TypeError") || err.contains("constant"), "got: {}", err);
}
#[test]
fn var_block_not_isolated() {
let result = eval("var x = 5; { x = 10; } x").unwrap();
assert_eq!(result.as_int(), 10);
}
#[test]
fn delete_existing_property() {
let result = eval("var o = {a: 1}; delete o.a; o.a").unwrap();
assert!(result.is_undefined());
}
#[test]
fn delete_returns_true() {
let result = eval("var o = {a: 1}; delete o.a").unwrap();
assert!(result.as_bool());
assert!(result.as_bool());
}
#[test]
fn instanceof_array() {
let result = eval("[] instanceof Array").unwrap();
assert!(result.as_bool());
}
#[test]
fn instance_not_array() {
let result = eval("({}) instanceof Array").unwrap();
assert!(!result.as_bool());
}
#[test]
fn void_returns_undefined() {
let result = eval("void 0").unwrap();
assert!(result.is_undefined());
}
crates/oxide_vm/tests/template_tests.rs
+118
View File
@@ -0,0 +1,118 @@
use oxide_compiler::compiler::Compiler;
use oxide_parser::Allocator;
use oxide_types::value::JsValue;
use oxide_vm::vm::Vm;
fn eval(source: &str) -> String {
let allocator = Allocator::default();
let program = match oxide_parser::parse(&allocator, source) {
Ok(p) => p,
Err(e) => return format!("parse error: {}", e[0].message),
};
let module = match Compiler::new().compile(&program) {
Ok(m) => m,
Err(e) => return format!("compile error: {}", e),
};
let mut vm = Vm::new();
match vm.run(&module) {
Ok(result) => format!("{}", result),
Err(e) => format!("vm error: {}", e),
}
}
fn eval_val(source: &str) -> (Vm, Result<JsValue, String>) {
let allocator = Allocator::default();
let program = match oxide_parser::parse(&allocator, source) {
Ok(p) => p,
Err(e) => return (Vm::new(), Err(format!("parse error: {}", e[0].message))),
};
let module = match Compiler::new().compile(&program) {
Ok(m) => m,
Err(e) => return (Vm::new(), Err(format!("compile error: {}", e))),
};
let mut vm = Vm::new();
let result = vm.run(&module);
(vm, result)
}
fn to_str(vm: &Vm, val: JsValue) -> String {
if val.is_string() {
vm.kernel()
.string_forge()
.lookup(val.as_string_index())
.unwrap_or_default()
} else {
format!("{}", val)
}
}
// -- Template literal tests --
#[test]
fn template_no_expressions() {
let (vm, result) = eval_val("`hello`");
assert_eq!(to_str(&vm, result.unwrap()), "hello");
}
#[test]
fn template_single_expression() {
let (vm, result) = eval_val("const name = 'world'; `hello ${name}`");
assert_eq!(to_str(&vm, result.unwrap()), "hello world");
}
#[test]
fn template_multiple_expressions() {
let (vm, result) = eval_val("`a${1}b${2}c`");
assert_eq!(to_str(&vm, result.unwrap()), "a1b2c");
}
#[test]
fn template_expression_only() {
let (vm, result) = eval_val("const x = 'foo', y = 'bar'; `${x}${y}`");
assert_eq!(to_str(&vm, result.unwrap()), "foobar");
}
#[test]
fn template_empty() {
let (vm, result) = eval_val("``");
assert_eq!(to_str(&vm, result.unwrap()), "");
}
#[test]
fn template_with_numbers() {
let (vm, result) = eval_val("`value is ${42}`");
assert_eq!(to_str(&vm, result.unwrap()), "value is 42");
}
#[test]
fn template_numeric_expression() {
let (vm, result) = eval_val("`${1 + 1}`");
assert_eq!(to_str(&vm, result.unwrap()), "2");
}
// -- Template tagging tests (basic) --
#[test]
fn tagged_template_basic() {
// Use Math.max as a simple native tag function to verify the CALL dispatch works.
// Math.max(cooked_array, raw_array, 42) should return 42 (the max of the args).
// This avoids bytecode function call complexity.
let result = eval("Math.max`hello ${42} world`");
// Math.max on the args should work - just verify it doesn't crash
assert!(
!result.starts_with("vm error:"),
"Tagged template should not crash, got: {}",
result
);
}
#[test]
fn tagged_template_compiles_no_error() {
// Verify that tagged templates compile without error (even if the tag
// function behavior isn't fully tested)
let result = eval("function t(s,v){ return s[0]+v; } t`x${1}`");
assert!(
!result.starts_with("compile error:"),
"Tagged template should compile"
);
}