/
CallExpression.ts
319 lines (302 loc) · 8.73 KB
/
CallExpression.ts
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import MagicString from 'magic-string';
import { NormalizedTreeshakingOptions } from '../../rollup/types';
import { BLANK } from '../../utils/blank';
import {
findFirstOccurrenceOutsideComment,
NodeRenderOptions,
RenderOptions
} from '../../utils/renderHelpers';
import { CallOptions } from '../CallOptions';
import { DeoptimizableEntity } from '../DeoptimizableEntity';
import { HasEffectsContext, InclusionContext } from '../ExecutionContext';
import { EVENT_CALLED, NodeEvent } from '../NodeEvents';
import {
EMPTY_PATH,
ObjectPath,
PathTracker,
SHARED_RECURSION_TRACKER,
UNKNOWN_PATH
} from '../utils/PathTracker';
import Identifier from './Identifier';
import MemberExpression from './MemberExpression';
import * as NodeType from './NodeType';
import SpreadElement from './SpreadElement';
import Super from './Super';
import {
ExpressionEntity,
LiteralValueOrUnknown,
UNKNOWN_EXPRESSION,
UnknownValue
} from './shared/Expression';
import { ExpressionNode, INCLUDE_PARAMETERS, IncludeChildren, NodeBase } from './shared/Node';
export default class CallExpression extends NodeBase implements DeoptimizableEntity {
arguments!: (ExpressionNode | SpreadElement)[];
callee!: ExpressionNode | Super;
optional!: boolean;
type!: NodeType.tCallExpression;
protected deoptimized = false;
private callOptions!: CallOptions;
private deoptimizableDependentExpressions: DeoptimizableEntity[] = [];
private expressionsToBeDeoptimized = new Set<ExpressionEntity>();
private returnExpression: ExpressionEntity | null = null;
bind(): void {
super.bind();
if (this.callee instanceof Identifier) {
const variable = this.scope.findVariable(this.callee.name);
if (variable.isNamespace) {
this.context.warn(
{
code: 'CANNOT_CALL_NAMESPACE',
message: `Cannot call a namespace ('${this.callee.name}')`
},
this.start
);
}
if (this.callee.name === 'eval') {
this.context.warn(
{
code: 'EVAL',
message: `Use of eval is strongly discouraged, as it poses security risks and may cause issues with minification`,
url: 'https://rollupjs.org/guide/en/#avoiding-eval'
},
this.start
);
}
}
this.callOptions = {
args: this.arguments,
thisParam:
this.callee instanceof MemberExpression && !this.callee.variable
? this.callee.object
: null,
withNew: false
};
}
deoptimizeCache(): void {
if (this.returnExpression !== UNKNOWN_EXPRESSION) {
this.returnExpression = UNKNOWN_EXPRESSION;
for (const expression of this.deoptimizableDependentExpressions) {
expression.deoptimizeCache();
}
for (const expression of this.expressionsToBeDeoptimized) {
expression.deoptimizePath(UNKNOWN_PATH);
}
}
}
deoptimizePath(path: ObjectPath): void {
if (
path.length === 0 ||
this.context.deoptimizationTracker.trackEntityAtPathAndGetIfTracked(path, this)
) {
return;
}
const returnExpression = this.getReturnExpression();
if (returnExpression !== UNKNOWN_EXPRESSION) {
returnExpression.deoptimizePath(path);
}
}
deoptimizeThisOnEventAtPath(
event: NodeEvent,
path: ObjectPath,
thisParameter: ExpressionEntity,
recursionTracker: PathTracker
): void {
const returnExpression = this.getReturnExpression(recursionTracker);
if (returnExpression === UNKNOWN_EXPRESSION) {
thisParameter.deoptimizePath(UNKNOWN_PATH);
} else {
recursionTracker.withTrackedEntityAtPath(
path,
returnExpression,
() => {
this.expressionsToBeDeoptimized.add(thisParameter);
returnExpression.deoptimizeThisOnEventAtPath(
event,
path,
thisParameter,
recursionTracker
);
},
undefined
);
}
}
getLiteralValueAtPath(
path: ObjectPath,
recursionTracker: PathTracker,
origin: DeoptimizableEntity
): LiteralValueOrUnknown {
const returnExpression = this.getReturnExpression(recursionTracker);
if (returnExpression === UNKNOWN_EXPRESSION) {
return UnknownValue;
}
return recursionTracker.withTrackedEntityAtPath(
path,
returnExpression,
() => {
this.deoptimizableDependentExpressions.push(origin);
return returnExpression.getLiteralValueAtPath(path, recursionTracker, origin);
},
UnknownValue
);
}
getReturnExpressionWhenCalledAtPath(
path: ObjectPath,
callOptions: CallOptions,
recursionTracker: PathTracker,
origin: DeoptimizableEntity
): ExpressionEntity {
const returnExpression = this.getReturnExpression(recursionTracker);
if (this.returnExpression === UNKNOWN_EXPRESSION) {
return UNKNOWN_EXPRESSION;
}
return recursionTracker.withTrackedEntityAtPath(
path,
returnExpression,
() => {
this.deoptimizableDependentExpressions.push(origin);
return returnExpression.getReturnExpressionWhenCalledAtPath(
path,
callOptions,
recursionTracker,
origin
);
},
UNKNOWN_EXPRESSION
);
}
hasEffects(context: HasEffectsContext): boolean {
try {
for (const argument of this.arguments) {
if (argument.hasEffects(context)) return true;
}
if (
(this.context.options.treeshake as NormalizedTreeshakingOptions).annotations &&
this.annotations
)
return false;
return (
this.callee.hasEffects(context) ||
this.callee.hasEffectsWhenCalledAtPath(EMPTY_PATH, this.callOptions, context)
);
} finally {
if (!this.deoptimized) this.applyDeoptimizations();
}
}
hasEffectsWhenAccessedAtPath(path: ObjectPath, context: HasEffectsContext): boolean {
return (
!context.accessed.trackEntityAtPathAndGetIfTracked(path, this) &&
this.getReturnExpression().hasEffectsWhenAccessedAtPath(path, context)
);
}
hasEffectsWhenAssignedAtPath(path: ObjectPath, context: HasEffectsContext): boolean {
return (
!context.assigned.trackEntityAtPathAndGetIfTracked(path, this) &&
this.getReturnExpression().hasEffectsWhenAssignedAtPath(path, context)
);
}
hasEffectsWhenCalledAtPath(
path: ObjectPath,
callOptions: CallOptions,
context: HasEffectsContext
): boolean {
return (
!(
callOptions.withNew ? context.instantiated : context.called
).trackEntityAtPathAndGetIfTracked(path, callOptions, this) &&
this.getReturnExpression().hasEffectsWhenCalledAtPath(path, callOptions, context)
);
}
include(context: InclusionContext, includeChildrenRecursively: IncludeChildren): void {
if (!this.deoptimized) this.applyDeoptimizations();
if (includeChildrenRecursively) {
super.include(context, includeChildrenRecursively);
if (
includeChildrenRecursively === INCLUDE_PARAMETERS &&
this.callee instanceof Identifier &&
this.callee.variable
) {
this.callee.variable.markCalledFromTryStatement();
}
} else {
this.included = true;
this.callee.include(context, false);
}
this.callee.includeCallArguments(context, this.arguments);
const returnExpression = this.getReturnExpression();
if (!returnExpression.included) {
returnExpression.include(context, false);
}
}
render(
code: MagicString,
options: RenderOptions,
{ renderedSurroundingElement }: NodeRenderOptions = BLANK
): void {
this.callee.render(code, options, {
isCalleeOfRenderedParent: true,
renderedSurroundingElement
});
if (this.arguments.length > 0) {
if (this.arguments[this.arguments.length - 1].included) {
for (const arg of this.arguments) {
arg.render(code, options);
}
} else {
let lastIncludedIndex = this.arguments.length - 2;
while (lastIncludedIndex >= 0 && !this.arguments[lastIncludedIndex].included) {
lastIncludedIndex--;
}
if (lastIncludedIndex >= 0) {
for (let index = 0; index <= lastIncludedIndex; index++) {
this.arguments[index].render(code, options);
}
code.remove(
findFirstOccurrenceOutsideComment(
code.original,
',',
this.arguments[lastIncludedIndex].end
),
this.end - 1
);
} else {
code.remove(
findFirstOccurrenceOutsideComment(code.original, '(', this.callee.end) + 1,
this.end - 1
);
}
}
}
}
protected applyDeoptimizations(): void {
this.deoptimized = true;
const { thisParam } = this.callOptions;
if (thisParam) {
this.callee.deoptimizeThisOnEventAtPath(
EVENT_CALLED,
EMPTY_PATH,
thisParam,
SHARED_RECURSION_TRACKER
);
}
for (const argument of this.arguments) {
// This will make sure all properties of parameters behave as "unknown"
argument.deoptimizePath(UNKNOWN_PATH);
}
this.context.requestTreeshakingPass();
}
private getReturnExpression(
recursionTracker: PathTracker = SHARED_RECURSION_TRACKER
): ExpressionEntity {
if (this.returnExpression === null) {
this.returnExpression = UNKNOWN_EXPRESSION;
return (this.returnExpression = this.callee.getReturnExpressionWhenCalledAtPath(
EMPTY_PATH,
this.callOptions,
recursionTracker,
this
));
}
return this.returnExpression;
}
}