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/**
* @fileoverview AssemblyScript's intermediate representation.
*
* The compiler uses Binaryen IR, which is fairly low level, as its
* primary intermediate representation, with the following structures
* holding any higher level information that cannot be represented by
* Binaryen IR alone, for example higher level types.
*
* Similar to the AST being composed of `Node`s in `Source`s, the IR is
* composed of `Element`s in a `Program`. Each class or function is
* represented by a "prototype" holding all the relevant information,
* including each's concrete instances. If a class or function is not
* generic, there is exactly one instance, otherwise there is one for
* each concrete set of type arguments.
*
* @license Apache-2.0
*/
// Element Base class of all elements
// ├─DeclaredElement Base class of elements with a declaration
// │ ├─TypedElement Base class of elements resolving to a type
// │ │ ├─TypeDefinition Type alias declaration
// │ │ ├─VariableLikeElement Base class of all variable-like elements
// │ │ │ ├─EnumValue Enum value
// │ │ │ ├─Global File global
// │ │ │ ├─Local Function local
// │ │ │ ├─Field Class field (instance only)
// │ │ │ └─Property Class property
// │ │ ├─IndexSignature Class index signature
// │ │ ├─Function Concrete function instance
// │ │ └─Class Concrete class instance
// │ ├─Namespace Namespace with static members
// │ ├─FunctionPrototype Prototype of concrete function instances
// │ ├─FieldPrototype Prototype of concrete field instances
// │ ├─PropertyPrototype Prototype of concrete property instances
// │ └─ClassPrototype Prototype of concrete classe instances
// └─File File, analogous to Source in the AST
import {
CommonFlags,
PATH_DELIMITER,
STATIC_DELIMITER,
INSTANCE_DELIMITER,
GETTER_PREFIX,
SETTER_PREFIX,
INNER_DELIMITER,
LIBRARY_SUBST,
INDEX_SUFFIX,
STUB_DELIMITER,
CommonNames,
Feature,
Target
} from "./common";
import {
Options
} from "./compiler";
import {
DiagnosticCode,
DiagnosticMessage,
DiagnosticEmitter
} from "./diagnostics";
import {
Type,
TypeKind,
Signature,
TypeFlags
} from "./types";
import {
Token,
Range
} from "./tokenizer";
import {
Node,
NodeKind,
Source,
SourceKind,
DecoratorNode,
DecoratorKind,
TypeParameterNode,
TypeNode,
NamedTypeNode,
FunctionTypeNode,
ArrowKind,
Expression,
IdentifierExpression,
LiteralKind,
StringLiteralExpression,
Statement,
ClassDeclaration,
DeclarationStatement,
EnumDeclaration,
EnumValueDeclaration,
ExportMember,
ExportDefaultStatement,
ExportStatement,
FieldDeclaration,
FunctionDeclaration,
ImportDeclaration,
ImportStatement,
InterfaceDeclaration,
MethodDeclaration,
NamespaceDeclaration,
TypeDeclaration,
VariableDeclaration,
VariableLikeDeclarationStatement,
VariableStatement,
ParameterKind
} from "./ast";
import {
Module,
FunctionRef,
MemorySegment
} from "./module";
import {
CharCode,
writeI8,
writeI16,
writeI32,
writeF32,
writeF64,
writeI64,
writeI32AsI64,
writeI64AsI32
} from "./util";
import {
Resolver
} from "./resolver";
import {
Flow
} from "./flow";
import {
Parser
} from "./parser";
import {
BuiltinNames
} from "./builtins";
// Memory manager constants
const AL_SIZE = 16;
const AL_MASK = AL_SIZE - 1;
/** Represents a yet unresolved `import`. */
class QueuedImport {
constructor(
/** File being imported into. */
public localFile: File,
/** Identifier within the local file. */
public localIdentifier: IdentifierExpression,
/** Identifier within the other file. Is an `import *` if not set. */
public foreignIdentifier: IdentifierExpression | null,
/** Path to the other file. */
public foreignPath: string,
/** Alternative path to the other file. */
public foreignPathAlt: string
) {}
}
/** Represents a yet unresolved `export`. */
class QueuedExport {
constructor(
/** Identifier within the local file. */
public localIdentifier: IdentifierExpression,
/** Identifier within the other file. */
public foreignIdentifier: IdentifierExpression,
/** Path to the other file if a re-export. */
public foreignPath: string | null,
/** Alternative path to the other file if a re-export. */
public foreignPathAlt: string | null
) {}
}
/** Represents a yet unresolved `export *`. */
class QueuedExportStar {
// stored in a map with localFile as the key
constructor(
/** Path to the other file. */
public foreignPath: string,
/** Alternative path to the other file. */
public foreignPathAlt: string,
/** Reference to the path literal for reporting. */
public pathLiteral: StringLiteralExpression
) {}
}
/** Represents the kind of an operator overload. */
export enum OperatorKind {
INVALID,
// indexed access
INDEXED_GET, // a[]
INDEXED_SET, // a[]=b
UNCHECKED_INDEXED_GET, // unchecked(a[])
UNCHECKED_INDEXED_SET, // unchecked(a[]=b)
// binary
ADD, // a + b
SUB, // a - b
MUL, // a * b
DIV, // a / b
REM, // a % b
POW, // a ** b
BITWISE_AND, // a & b
BITWISE_OR, // a | b
BITWISE_XOR, // a ^ b
BITWISE_SHL, // a << b
BITWISE_SHR, // a >> b
BITWISE_SHR_U, // a >>> b
EQ, // a == b
NE, // a != b
GT, // a > b
GE, // a >= b
LT, // a < b
LE, // a <= b
// unary prefix
PLUS, // +a
MINUS, // -a
NOT, // !a
BITWISE_NOT, // ~a
PREFIX_INC, // ++a
PREFIX_DEC, // --a
// unary postfix
POSTFIX_INC, // a++
POSTFIX_DEC // a--
// not overridable:
// IDENTITY // a === b
// LOGICAL_AND // a && b
// LOGICAL_OR // a || b
}
export namespace OperatorKind {
/** Returns the operator kind represented by the specified decorator and string argument. */
export function fromDecorator(decoratorKind: DecoratorKind, arg: string): OperatorKind {
assert(arg.length);
switch (decoratorKind) {
case DecoratorKind.OPERATOR:
case DecoratorKind.OPERATOR_BINARY: {
switch (arg.charCodeAt(0)) {
case CharCode.OPENBRACKET: {
if (arg == "[]") return OperatorKind.INDEXED_GET;
if (arg == "[]=") return OperatorKind.INDEXED_SET;
break;
}
case CharCode.OPENBRACE: {
if (arg == "{}") return OperatorKind.UNCHECKED_INDEXED_GET;
if (arg == "{}=") return OperatorKind.UNCHECKED_INDEXED_SET;
break;
}
case CharCode.PLUS: {
if (arg == "+") return OperatorKind.ADD;
break;
}
case CharCode.MINUS: {
if (arg == "-") return OperatorKind.SUB;
break;
}
case CharCode.ASTERISK: {
if (arg == "*") return OperatorKind.MUL;
if (arg == "**") return OperatorKind.POW;
break;
}
case CharCode.SLASH: {
if (arg == "/") return OperatorKind.DIV;
break;
}
case CharCode.PERCENT: {
if (arg == "%") return OperatorKind.REM;
break;
}
case CharCode.AMPERSAND: {
if (arg == "&") return OperatorKind.BITWISE_AND;
break;
}
case CharCode.BAR: {
if (arg == "|") return OperatorKind.BITWISE_OR;
break;
}
case CharCode.CARET: {
if (arg == "^") return OperatorKind.BITWISE_XOR;
break;
}
case CharCode.EQUALS: {
if (arg == "==") return OperatorKind.EQ;
break;
}
case CharCode.EXCLAMATION: {
if (arg == "!=") return OperatorKind.NE;
break;
}
case CharCode.GREATERTHAN: {
if (arg == ">") return OperatorKind.GT;
if (arg == ">=") return OperatorKind.GE;
if (arg == ">>") return OperatorKind.BITWISE_SHR;
if (arg == ">>>") return OperatorKind.BITWISE_SHR_U;
break;
}
case CharCode.LESSTHAN: {
if (arg == "<") return OperatorKind.LT;
if (arg == "<=") return OperatorKind.LE;
if (arg == "<<") return OperatorKind.BITWISE_SHL;
break;
}
}
break;
}
case DecoratorKind.OPERATOR_PREFIX: {
switch (arg.charCodeAt(0)) {
case CharCode.PLUS: {
if (arg == "+") return OperatorKind.PLUS;
if (arg == "++") return OperatorKind.PREFIX_INC;
break;
}
case CharCode.MINUS: {
if (arg == "-") return OperatorKind.MINUS;
if (arg == "--") return OperatorKind.PREFIX_DEC;
break;
}
case CharCode.EXCLAMATION: {
if (arg == "!") return OperatorKind.NOT;
break;
}
case CharCode.TILDE: {
if (arg == "~") return OperatorKind.BITWISE_NOT;
break;
}
}
break;
}
case DecoratorKind.OPERATOR_POSTFIX: {
switch (arg.charCodeAt(0)) {
case CharCode.PLUS: {
if (arg == "++") return OperatorKind.POSTFIX_INC;
break;
}
case CharCode.MINUS: {
if (arg == "--") return OperatorKind.POSTFIX_DEC;
break;
}
}
break;
}
}
return OperatorKind.INVALID;
}
/** Converts a binary operator token to the respective operator kind. */
export function fromBinaryToken(token: Token): OperatorKind {
switch (token) {
case Token.PLUS:
case Token.PLUS_EQUALS: return OperatorKind.ADD;
case Token.MINUS:
case Token.MINUS_EQUALS: return OperatorKind.SUB;
case Token.ASTERISK:
case Token.ASTERISK_EQUALS: return OperatorKind.MUL;
case Token.SLASH:
case Token.SLASH_EQUALS: return OperatorKind.DIV;
case Token.PERCENT:
case Token.PERCENT_EQUALS: return OperatorKind.REM;
case Token.ASTERISK_ASTERISK:
case Token.ASTERISK_ASTERISK_EQUALS: return OperatorKind.POW;
case Token.AMPERSAND:
case Token.AMPERSAND_EQUALS: return OperatorKind.BITWISE_AND;
case Token.BAR:
case Token.BAR_EQUALS: return OperatorKind.BITWISE_OR;
case Token.CARET:
case Token.CARET_EQUALS: return OperatorKind.BITWISE_XOR;
case Token.LESSTHAN_LESSTHAN:
case Token.LESSTHAN_LESSTHAN_EQUALS: return OperatorKind.BITWISE_SHL;
case Token.GREATERTHAN_GREATERTHAN:
case Token.GREATERTHAN_GREATERTHAN_EQUALS: return OperatorKind.BITWISE_SHR;
case Token.GREATERTHAN_GREATERTHAN_GREATERTHAN:
case Token.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS: return OperatorKind.BITWISE_SHR_U;
case Token.EQUALS_EQUALS: return OperatorKind.EQ;
case Token.EXCLAMATION_EQUALS: return OperatorKind.NE;
case Token.GREATERTHAN: return OperatorKind.GT;
case Token.GREATERTHAN_EQUALS: return OperatorKind.GE;
case Token.LESSTHAN: return OperatorKind.LT;
case Token.LESSTHAN_EQUALS: return OperatorKind.LE;
}
return OperatorKind.INVALID;
}
/** Converts a unary prefix operator token to the respective operator kind. */
export function fromUnaryPrefixToken(token: Token): OperatorKind {
switch (token) {
case Token.PLUS: return OperatorKind.PLUS;
case Token.MINUS: return OperatorKind.MINUS;
case Token.EXCLAMATION: return OperatorKind.NOT;
case Token.TILDE: return OperatorKind.BITWISE_NOT;
case Token.PLUS_PLUS: return OperatorKind.PREFIX_INC;
case Token.MINUS_MINUS: return OperatorKind.PREFIX_DEC;
}
return OperatorKind.INVALID;
}
/** Converts a unary postfix operator token to the respective operator kind. */
export function fromUnaryPostfixToken(token: Token): OperatorKind {
switch (token) {
case Token.PLUS_PLUS: return OperatorKind.POSTFIX_INC;
case Token.MINUS_MINUS: return OperatorKind.POSTFIX_DEC;
}
return OperatorKind.INVALID;
}
}
/** Represents an AssemblyScript program. */
export class Program extends DiagnosticEmitter {
/** Constructs a new program, optionally inheriting parser diagnostics. */
constructor(
/** Compiler options. */
public options: Options,
/** Shared array of diagnostic messages (emitted so far). */
diagnostics: DiagnosticMessage[] | null = null
) {
super(diagnostics);
var nativeSource = new Source(SourceKind.LIBRARY_ENTRY, LIBRARY_SUBST + ".wasm", "[native code]");
this.nativeSource = nativeSource;
this.parser = new Parser(this.diagnostics, this.sources);
this.resolver = new Resolver(this);
var nativeFile = new File(this, nativeSource);
this.nativeFile = nativeFile;
this.filesByName.set(nativeFile.internalName, nativeFile);
}
/** Parser instance. */
parser: Parser;
/** Resolver instance. */
resolver!: Resolver;
/** Array of sources. */
sources: Source[] = [];
/** Diagnostic offset used where successively obtaining the next diagnostic. */
diagnosticsOffset: i32 = 0;
/** Special native code source. */
nativeSource: Source;
/** Special native code range. */
get nativeRange(): Range { return this.nativeSource.range; }
/** Special native code file. */
nativeFile!: File;
/** Next class id. */
nextClassId: u32 = 0;
/** Next signature id. */
nextSignatureId: i32 = 0;
/** An indicator if the program has been initialized. */
initialized: bool = false;
// Lookup maps
/** Files by unique internal name. */
filesByName: Map<string,File> = new Map();
/** Elements by unique internal name in element space. */
elementsByName: Map<string,Element> = new Map();
/** Elements by declaration. */
elementsByDeclaration: Map<DeclarationStatement,DeclaredElement> = new Map();
/** Element instances by unique internal name. */
instancesByName: Map<string,Element> = new Map();
/** Classes wrapping basic types like `i32`. */
wrapperClasses: Map<Type,Class> = new Map();
/** Managed classes contained in the program, by id. */
managedClasses: Map<i32,Class> = new Map();
/** A set of unique function signatures contained in the program, by id. */
uniqueSignatures: Signature[] = new Array<Signature>(0);
// Standard library
/** Gets the standard `ArrayBufferView` instance. */
get arrayBufferViewInstance(): Class {
var cached = this._arrayBufferViewInstance;
if (!cached) this._arrayBufferViewInstance = cached = this.requireClass(CommonNames.ArrayBufferView);
return cached;
}
private _arrayBufferViewInstance: Class | null = null;
/** Gets the standard `ArrayBuffer` instance. */
get arrayBufferInstance(): Class {
var cached = this._arrayBufferInstance;
if (!cached) this._arrayBufferInstance = cached = this.requireClass(CommonNames.ArrayBuffer);
return cached;
}
private _arrayBufferInstance: Class | null = null;
/** Gets the standard `Array` prototype. */
get arrayPrototype(): ClassPrototype {
var cached = this._arrayPrototype;
if (!cached) this._arrayPrototype = cached = <ClassPrototype>this.require(CommonNames.Array, ElementKind.CLASS_PROTOTYPE);
return cached;
}
private _arrayPrototype: ClassPrototype | null = null;
/** Gets the standard `StaticArray` prototype. */
get staticArrayPrototype(): ClassPrototype {
var cached = this._staticArrayPrototype;
if (!cached) this._staticArrayPrototype = cached = <ClassPrototype>this.require(CommonNames.StaticArray, ElementKind.CLASS_PROTOTYPE);
return cached;
}
private _staticArrayPrototype: ClassPrototype | null = null;
/** Gets the standard `Set` prototype. */
get setPrototype(): ClassPrototype {
var cached = this._setPrototype;
if (!cached) this._setPrototype = cached = <ClassPrototype>this.require(CommonNames.Set, ElementKind.CLASS_PROTOTYPE);
return cached;
}
private _setPrototype: ClassPrototype | null = null;
/** Gets the standard `Map` prototype. */
get mapPrototype(): ClassPrototype {
var cached = this._mapPrototype;
if (!cached) this._mapPrototype = cached = <ClassPrototype>this.require(CommonNames.Map, ElementKind.CLASS_PROTOTYPE);
return cached;
}
private _mapPrototype: ClassPrototype | null = null;
/** Gets the standard `Function` prototype. */
get functionPrototype(): ClassPrototype {
var cached = this._functionPrototype;
if (!cached) this._functionPrototype = cached = <ClassPrototype>this.require(CommonNames.Function, ElementKind.CLASS_PROTOTYPE);
return cached;
}
private _functionPrototype: ClassPrototype | null = null;
/** Gets the standard `Int8Array` prototype. */
get int8ArrayPrototype(): ClassPrototype {
var cached = this._int8ArrayPrototype;
if (!cached) this._int8ArrayPrototype = cached = <ClassPrototype>this.require(CommonNames.Int8Array, ElementKind.CLASS_PROTOTYPE);
return cached;
}
private _int8ArrayPrototype: ClassPrototype | null = null;
/** Gets the standard `Int16Array` prototype. */
get int16ArrayPrototype(): ClassPrototype {
var cached = this._int16ArrayPrototype;
if (!cached) this._int16ArrayPrototype = cached = <ClassPrototype>this.require(CommonNames.Int16Array, ElementKind.CLASS_PROTOTYPE);
return cached;
}
private _int16ArrayPrototype: ClassPrototype | null = null;
/** Gets the standard `Int32Array` prototype. */
get int32ArrayPrototype(): ClassPrototype {
var cached = this._int32ArrayPrototype;
if (!cached) this._int32ArrayPrototype = cached = <ClassPrototype>this.require(CommonNames.Int32Array, ElementKind.CLASS_PROTOTYPE);
return cached;
}
private _int32ArrayPrototype: ClassPrototype | null = null;
/** Gets the standard `Int64Array` prototype. */
get int64ArrayPrototype(): ClassPrototype {
var cached = this._int64ArrayPrototype;
if (!cached) this._int64ArrayPrototype = cached = <ClassPrototype>this.require(CommonNames.Int64Array, ElementKind.CLASS_PROTOTYPE);
return cached;
}
private _int64ArrayPrototype: ClassPrototype | null = null;
/** Gets the standard `Uint8Array` prototype. */
get uint8ArrayPrototype(): ClassPrototype {
var cached = this._uint8ArrayPrototype;
if (!cached) this._uint8ArrayPrototype = cached = <ClassPrototype>this.require(CommonNames.Uint8Array, ElementKind.CLASS_PROTOTYPE);
return cached;
}
private _uint8ArrayPrototype: ClassPrototype | null = null;
/** Gets the standard `Uint8ClampedArray` prototype. */
get uint8ClampedArrayPrototype(): ClassPrototype {
var cached = this._uint8ClampedArrayPrototype;
if (!cached) this._uint8ClampedArrayPrototype = cached = <ClassPrototype>this.require(CommonNames.Uint8ClampedArray, ElementKind.CLASS_PROTOTYPE);
return cached;
}
private _uint8ClampedArrayPrototype: ClassPrototype | null = null;
/** Gets the standard `Uint16Array` prototype. */
get uint16ArrayPrototype(): ClassPrototype {
var cached = this._uint16ArrayPrototype;
if (!cached) this._uint16ArrayPrototype = cached = <ClassPrototype>this.require(CommonNames.Uint16Array, ElementKind.CLASS_PROTOTYPE);
return cached;
}
private _uint16ArrayPrototype: ClassPrototype | null = null;
/** Gets the standard `Uint32Array` prototype. */
get uint32ArrayPrototype(): ClassPrototype {
var cached = this._uint32ArrayPrototype;
if (!cached) this._uint32ArrayPrototype = cached = <ClassPrototype>this.require(CommonNames.Uint32Array, ElementKind.CLASS_PROTOTYPE);
return cached;
}
private _uint32ArrayPrototype: ClassPrototype | null = null;
/** Gets the standard `Uint64Array` prototype. */
get uint64ArrayPrototype(): ClassPrototype {
var cached = this._uint64ArrayPrototype;
if (!cached) this._uint64ArrayPrototype = cached = <ClassPrototype>this.require(CommonNames.Uint64Array, ElementKind.CLASS_PROTOTYPE);
return cached;
}
private _uint64ArrayPrototype: ClassPrototype | null = null;
/** Gets the standard `Float32Array` prototype. */
get float32ArrayPrototype(): ClassPrototype {
var cached = this._float32ArrayPrototype;
if (!cached) this._float32ArrayPrototype = cached = <ClassPrototype>this.require(CommonNames.Float32Array, ElementKind.CLASS_PROTOTYPE);
return cached;
}
private _float32ArrayPrototype: ClassPrototype | null = null;
/** Gets the standard `Float64Array` prototype. */
get float64ArrayPrototype(): ClassPrototype {
var cached = this._float64ArrayPrototype;
if (!cached) this._float64ArrayPrototype = cached = <ClassPrototype>this.require(CommonNames.Float64Array, ElementKind.CLASS_PROTOTYPE);
return cached;
}
private _float64ArrayPrototype: ClassPrototype | null = null;
/** Gets the standard `String` instance. */
get stringInstance(): Class {
var cached = this._stringInstance;
if (!cached) this._stringInstance = cached = this.requireClass(CommonNames.String);
return cached;
}
private _stringInstance: Class | null = null;
/** Gets the standard `Object` instance. */
get objectInstance(): Class {
var cached = this._objectInstance;
if (!cached) this._objectInstance = cached = this.requireClass(CommonNames.Object);
return cached;
}
private _objectInstance: Class | null = null;
/** Gets the standard `TemplateStringsArray` instance. */
get templateStringsArrayInstance(): Class {
var cached = this._templateStringsArrayInstance;
if (!cached) this._templateStringsArrayInstance = cached = this.requireClass(CommonNames.TemplateStringsArray);
return cached;
}
private _templateStringsArrayInstance: Class | null = null;
/** Gets the standard `abort` instance, if not explicitly disabled. */
get abortInstance(): Function | null {
var prototype = this.lookup(CommonNames.abort);
if (!prototype || prototype.kind != ElementKind.FUNCTION_PROTOTYPE) return null;
return this.resolver.resolveFunction(<FunctionPrototype>prototype, null);
}
// Runtime interface
/** Gets the runtime `__alloc(size: usize): usize` instance. */
get allocInstance(): Function {
var cached = this._allocInstance;
if (!cached) this._allocInstance = cached = this.requireFunction(CommonNames.alloc);
return cached;
}
private _allocInstance: Function | null = null;
/** Gets the runtime `__realloc(ptr: usize, newSize: usize): usize` instance. */
get reallocInstance(): Function {
var cached = this._reallocInstance;
if (!cached) this._reallocInstance = cached = this.requireFunction(CommonNames.realloc);
return cached;
}
private _reallocInstance: Function | null = null;
/** Gets the runtime `__free(ptr: usize): void` instance. */
get freeInstance(): Function {
var cached = this._freeInstance;
if (!cached) this._freeInstance = cached = this.requireFunction(CommonNames.free);
return cached;
}
private _freeInstance: Function | null = null;
/** Gets the runtime `__new(size: usize, id: u32): usize` instance. */
get newInstance(): Function {
var cached = this._newInstance;
if (!cached) this._newInstance = cached = this.requireFunction(CommonNames.new_);
return cached;
}
private _newInstance: Function | null = null;
/** Gets the runtime `__renew(ptr: usize, size: usize): usize` instance. */
get renewInstance(): Function {
var cached = this._renewInstance;
if (!cached) this._renewInstance = cached = this.requireFunction(CommonNames.renew);
return cached;
}
private _renewInstance: Function | null = null;
/** Gets the runtime `__link(parentPtr: usize, childPtr: usize, expectMultiple: bool): void` instance. */
get linkInstance(): Function {
var cached = this._linkInstance;
if (!cached) this._linkInstance = cached = this.requireFunction(CommonNames.link);
return cached;
}
private _linkInstance: Function | null = null;
/** Gets the runtime `__collect(): void` instance. */
get collectInstance(): Function {
var cached = this._collectInstance;
if (!cached) this._collectInstance = cached = this.requireFunction(CommonNames.collect);
return cached;
}
private _collectInstance: Function | null = null;
/** Gets the runtime `__visit(ptr: usize, cookie: u32): void` instance. */
get visitInstance(): Function {
var cached = this._visitInstance;
if (!cached) this._visitInstance = cached = this.requireFunction(CommonNames.visit);
return cached;
}
private _visitInstance: Function | null = null;
/** Gets the runtime `__typeinfo(id: u32): RTTIFlags` instance. */
get typeinfoInstance(): Function {
var cached = this._typeinfoInstance;
if (!cached) this._typeinfoInstance = cached = this.requireFunction(CommonNames.typeinfo);
return cached;
}
private _typeinfoInstance: Function | null = null;
/** Gets the runtime `__instanceof(ptr: usize, superId: u32): bool` instance. */
get instanceofInstance(): Function {
var cached = this._instanceofInstance;
if (!cached) this._instanceofInstance = cached = this.requireFunction(CommonNames.instanceof_);
return cached;
}
private _instanceofInstance: Function | null = null;
/** Gets the runtime `__newBuffer(size: usize, id: u32, data: usize = 0): usize` instance. */
get newBufferInstance(): Function {
var cached = this._newBufferInstance;
if (!cached) this._newBufferInstance = cached = this.requireFunction(CommonNames.newBuffer);
return cached;
}
private _newBufferInstance: Function | null = null;
/** Gets the runtime `__newArray(length: i32, alignLog2: usize, id: u32, data: usize = 0): usize` instance. */
get newArrayInstance(): Function {
var cached = this._newArrayInstance;
if (!cached) this._newArrayInstance = cached = this.requireFunction(CommonNames.newArray);
return cached;
}
private _newArrayInstance: Function | null = null;
/** Gets the runtime's internal `BLOCK` instance. */
get BLOCKInstance(): Class {
var cached = this._BLOCKInstance;
if (!cached) this._BLOCKInstance = cached = this.requireClass(CommonNames.BLOCK);
return cached;
}
private _BLOCKInstance: Class | null = null;
/** Gets the runtime's internal `OBJECT` instance. */
get OBJECTInstance(): Class {
var cached = this._OBJECTInstance;
if (!cached) this._OBJECTInstance = cached = this.requireClass(CommonNames.OBJECT);
return cached;
}
private _OBJECTInstance: Class | null = null;
// Utility
/** Tests whether this is a WASI program. */
get isWasi(): bool {
return this.elementsByName.has(CommonNames.ASC_WASI);
}
/** Obtains the source matching the specified internal path. */
getSource(internalPath: string): string | null {
var sources = this.sources;
for (let i = 0; i < sources.length; ++i) {
let source = sources[i];
if (source.internalPath == internalPath) return source.text;
}
return null;
}
/** Gets the overhead of a memory manager block. */
get blockOverhead(): i32 {
// BLOCK | data...
// ^ 16b alignment
return this.BLOCKInstance.nextMemoryOffset;
}
/** Gets the overhead of a managed object, excl. block overhead, incl. alignment. */
get objectOverhead(): i32 {
// OBJECT+align | data...
// └ 0 ┘ ^ 16b alignment
return (this.OBJECTInstance.nextMemoryOffset - this.blockOverhead + AL_MASK) & ~AL_MASK;
}
/** Gets the total overhead of a managed object, incl. block overhead. */
get totalOverhead(): i32 {
// BLOCK | OBJECT+align | data...
// └ = TOTAL ┘ ^ 16b alignment
return this.blockOverhead + this.objectOverhead;
}
/** Computes the next properly aligned offset of a memory manager block, given the current bump offset. */
computeBlockStart(currentOffset: i32): i32 {
var blockOverhead = this.blockOverhead;
return ((currentOffset + blockOverhead + AL_MASK) & ~AL_MASK) - blockOverhead;
}
/** Computes the next properly aligned offset of a memory manager block, given the current bump offset. */
computeBlockStart64(currentOffset: i64): i64 {
var blockOverhead = i64_new(this.blockOverhead);
return i64_sub(i64_align(i64_add(currentOffset, blockOverhead), AL_SIZE), blockOverhead);
}
/** Computes the size of a memory manager block, excl. block overhead. */
computeBlockSize(payloadSize: i32, isManaged: bool): i32 {
// see: std/rt/tlsf.ts, computeSize; becomes mmInfo
if (isManaged) payloadSize += this.objectOverhead;
// we know that payload must be aligned, and that block sizes must be chosen
// so that blocks are adjacent with the next payload aligned. hence, block
// size is payloadSize rounded up to where the next block would start:
var blockSize = this.computeBlockStart(payloadSize);
// make sure that block size is valid according to TLSF requirements
var blockOverhead = this.blockOverhead;
var blockMinsize = ((3 * this.options.usizeType.byteSize + blockOverhead + AL_MASK) & ~AL_MASK) - blockOverhead;
if (blockSize < blockMinsize) blockSize = blockMinsize;
const blockMaxsize = 1 << 30; // 1 << (FL_BITS + SB_BITS - 1), exclusive
const tagsMask = 3;
if (blockSize >= blockMaxsize || (blockSize & tagsMask) != 0) {
throw new Error("invalid block size");
}
return blockSize;
}
/** Creates a native variable declaration. */
makeNativeVariableDeclaration(
/** The simple name of the variable */
name: string,
/** Flags indicating specific traits, e.g. `CONST`. */
flags: CommonFlags = CommonFlags.NONE
): VariableDeclaration {
var range = this.nativeSource.range;
return Node.createVariableDeclaration(
Node.createIdentifierExpression(name, range),
null, flags, null, null, range
);
}
/** Creates a native type declaration. */
makeNativeTypeDeclaration(
/** The simple name of the type. */
name: string,
/** Flags indicating specific traits, e.g. `GENERIC`. */
flags: CommonFlags = CommonFlags.NONE
): TypeDeclaration {
var range = this.nativeSource.range;
var identifier = Node.createIdentifierExpression(name, range);
return Node.createTypeDeclaration(
identifier,
null, flags, null,
Node.createOmittedType(range),
range
);
}
// a dummy signature for programmatically generated native functions
private nativeDummySignature: FunctionTypeNode | null = null;
/** Creates a native function declaration. */
makeNativeFunctionDeclaration(
/** The simple name of the function. */
name: string,
/** Flags indicating specific traits, e.g. `DECLARE`. */
flags: CommonFlags = CommonFlags.NONE
): FunctionDeclaration {
var range = this.nativeSource.range;
var signature = this.nativeDummySignature;
if (!signature) {
this.nativeDummySignature = signature = Node.createFunctionType([],
Node.createNamedType( // ^ AST signature doesn't really matter, is overridden anyway
Node.createSimpleTypeName(CommonNames.void_, range),
null, false, range
),
null, false, range
);
}
return Node.createFunctionDeclaration(
Node.createIdentifierExpression(name, range),
null, flags, null, signature, null, ArrowKind.NONE, range
);
}
/** Creates a native namespace declaration. */
makeNativeNamespaceDeclaration(
/** The simple name of the namespace. */
name: string,
/** Flags indicating specific traits, e.g. `EXPORT`. */
flags: CommonFlags = CommonFlags.NONE
): NamespaceDeclaration {
var range = this.nativeSource.range;
return Node.createNamespaceDeclaration(
Node.createIdentifierExpression(name, range),
null, flags, [], range
);
}
/** Creates a native function. */
makeNativeFunction(
/** The simple name of the function. */
name: string,
/** Concrete function signature. */
signature: Signature,
/** Parent element, usually a file, class or namespace. */
parent: Element = this.nativeFile,
/** Flags indicating specific traits, e.g. `GENERIC`. */
flags: CommonFlags = CommonFlags.NONE,
/** Decorator flags representing built-in decorators. */
decoratorFlags: DecoratorFlags = DecoratorFlags.NONE
): Function {
return new Function(
name,
new FunctionPrototype(
name,
parent,
this.makeNativeFunctionDeclaration(name, flags),
decoratorFlags
),
null,
signature
);
}
/** Gets the (possibly merged) program element linked to the specified declaration. */
getElementByDeclaration(declaration: DeclarationStatement): DeclaredElement | null {
var elementsByDeclaration = this.elementsByDeclaration;
return elementsByDeclaration.has(declaration)
? assert(elementsByDeclaration.get(declaration))
: null;
}
/** Initializes the program and its elements prior to compilation. */
initialize(): void {
if (this.initialized) return;
this.initialized = true;
var options = this.options;
// register native types
this.registerNativeType(CommonNames.i8, Type.i8);
this.registerNativeType(CommonNames.i16, Type.i16);
this.registerNativeType(CommonNames.i32, Type.i32);
this.registerNativeType(CommonNames.i64, Type.i64);
this.registerNativeType(CommonNames.isize, options.isizeType);
this.registerNativeType(CommonNames.u8, Type.u8);
this.registerNativeType(CommonNames.u16, Type.u16);
this.registerNativeType(CommonNames.u32, Type.u32);
this.registerNativeType(CommonNames.u64, Type.u64);
this.registerNativeType(CommonNames.usize, options.usizeType);
this.registerNativeType(CommonNames.bool, Type.bool);
this.registerNativeType(CommonNames.f32, Type.f32);
this.registerNativeType(CommonNames.f64, Type.f64);
this.registerNativeType(CommonNames.void_, Type.void);
this.registerNativeType(CommonNames.number, Type.f64); // alias
this.registerNativeType(CommonNames.boolean, Type.bool); // alias
this.nativeFile.add(CommonNames.native, new TypeDefinition(
CommonNames.native,
this.nativeFile,
this.makeNativeTypeDeclaration(CommonNames.native, CommonFlags.EXPORT | CommonFlags.GENERIC),
DecoratorFlags.BUILTIN
));
this.nativeFile.add(CommonNames.indexof, new TypeDefinition(
CommonNames.indexof,
this.nativeFile,
this.makeNativeTypeDeclaration(CommonNames.indexof, CommonFlags.EXPORT | CommonFlags.GENERIC),
DecoratorFlags.BUILTIN
));
this.nativeFile.add(CommonNames.valueof, new TypeDefinition(
CommonNames.valueof,
this.nativeFile,
this.makeNativeTypeDeclaration(CommonNames.valueof, CommonFlags.EXPORT | CommonFlags.GENERIC),
DecoratorFlags.BUILTIN
));
this.nativeFile.add(CommonNames.returnof, new TypeDefinition(
CommonNames.returnof,
this.nativeFile,
this.makeNativeTypeDeclaration(CommonNames.returnof, CommonFlags.EXPORT | CommonFlags.GENERIC),
DecoratorFlags.BUILTIN
));
this.nativeFile.add(CommonNames.nonnull, new TypeDefinition(
CommonNames.nonnull,
this.nativeFile,
this.makeNativeTypeDeclaration(CommonNames.nonnull, CommonFlags.EXPORT | CommonFlags.GENERIC),
DecoratorFlags.BUILTIN
));