Module Expr

Provides classes for working with expressions.

Import path

import semmle.javascript.Expr

Imports

Provides classes for working with JavaScript programs, as well as JSON, YAML and HTML.

Classes

AddExpr	An addition or string-concatenation expression.
ArithmeticExpr	A binary arithmetic expression using `+`, `-`, `/`, `%` or `**`.
ArrayComprehensionExpr	An array comprehension expression.
ArrayExpr	An array literal.
ArrowFunctionExpr	An arrow function expression.
AssignAddExpr	A compound add-assign expression.
AssignAndExpr	A compound bitwise-‘and’-assign expression.
AssignDivExpr	A compound divide-assign expression.
AssignExpExpr	A compound exponentiate-assign expression.
AssignExpr	A simple assignment expression.
AssignLShiftExpr	A compound left-shift-assign expression.
AssignLogAndExpr	A logical-‘and’-assign expression.
AssignLogOrExpr	A logical-‘or’-assign expression.
AssignModExpr	A compound modulo-assign expression.
AssignMulExpr	A compound multiply-assign expression.
AssignNullishCoalescingExpr	A ‘nullish-coalescing’-assign expression.
AssignOrExpr	A compound bitwise-‘or’-assign expression.
AssignRShiftExpr	A compound right-shift-assign expression.
AssignSubExpr	A compound subtract-assign expression.
AssignURShiftExpr	A compound unsigned-right-shift-assign expression.
AssignXOrExpr	A compound exclusive-‘or’-assign expression.
Assignment	An assignment expression, either compound or simple.
AwaitExpr	An `await` expression.
BigIntLiteral	A BigInt literal.
BinaryExpr	An expression with a binary operator.
BitAndExpr	A bitwise ‘and’ expression.
BitNotExpr	A bitwise negation expression.
BitOrExpr	A bitwise ‘or’ expression.
BitwiseBinaryExpr	A bitwise binary expression, that is, either a bitwise ‘and’, a bitwise ‘or’, or an exclusive ‘or’ expression.
BitwiseExpr	A bitwise expression using `&`, `\|`, `^`, `~`, `<<`, `>>`, or `>>>`.
BooleanLiteral	A Boolean literal, that is, either `true` or `false`.
CallExpr	A function call expression.
Comparison	A comparison expression, that is, either an equality test (`==`, `!=`, `===`, `!==`) or a relational expression (`<`, `<=`, `>=`, `>`).
CompoundAssignExpr	A compound assign expression.
ComprehensionBlock	A comprehension block in a comprehension expression.
ComprehensionExpr	A comprehension expression, that is, either an array comprehension expression or a generator expression.
ConditionalExpr	A conditional expression.
DecExpr	A (pre or post) decrement expression.
Decoratable	A program element to which decorators can be applied, that is, a class, a property or a member definition.
Decorator	A decorator applied to a class, property or member definition.
DeleteExpr	A `delete` expression.
DivExpr	A division expression.
DotExpr	A dot expression.
DynamicImportExpr	A dynamic import expression.
EqExpr	An equality test using `==`.
EqualityTest	An equality test using `==`, `!=`, `===` or `!==`.
ExpExpr	An exponentiation expression.
Expr	An expression.
ExprOrType	A program element that is either an expression or a type annotation.
ForInComprehensionBlock	A `for`-`in` comprehension block in a comprehension expression.
ForOfComprehensionBlock	A `for`-`of` comprehension block in a comprehension expression.
FunctionBindExpr	A function-bind expression.
FunctionExpr	A (non-arrow) function expression.
FunctionSentExpr	A `function.sent` expression.
GEExpr	A greater-than-or-equal expression.
GTExpr	A greater-than expression.
GeneratedCodeExpr	A placeholder for some code generated by a templating engine, speculatively parsed as an expression.
GeneratorExpr	A generator expression.
Identifier	An identifier.
ImmediatelyInvokedFunctionExpr	An immediately invoked function expression (IIFE).
ImportMetaExpr	An `import.meta` expression.
InExpr	An `in` expression.
IncExpr	A (pre or post) increment expression.
IndexExpr	An index expression (also known as computed property access).
InstanceofExpr	An `instanceof` expression.
InvokeExpr	An invocation expression, that is, either a function call or a `new` expression.
LEExpr	A less-than-or-equal expression.
LShiftExpr	A left-shift expression using `<<`.
LTExpr	A less-than expression.
Label	A statement or property label, that is, an identifier that does not refer to a variable.
LegacyLetExpr	An old-style `let` expression of the form `let(vardecls) expr`.
Literal	A literal.
LogAndExpr	A logical ‘and’ expression.
LogNotExpr	A logical negation expression.
LogOrExpr	A logical ‘or’ expression.
LogicalBinaryExpr	A short-circuiting logical binary expression, that is, a logical ‘or’ expression, a logical ‘and’ expression, or a nullish-coalescing expression.
LogicalExpr	A logical expression using `&&`, `\|\|`, or `!`.
MethodCallExpr	A method call expression.
ModExpr	A modulo expression.
MulExpr	A multiplication expression.
NEqExpr	An inequality test using `!=`.
NegExpr	An arithmetic negation expression (also known as unary minus).
NewExpr	A `new` expression.
NonStrictEqualityTest	A non-strict equality test using `!=` or `==`.
NullLiteral	A `null` literal.
NullishCoalescingExpr	A nullish coalescing ‘??’ expression.
NumberLiteral	A numeric literal.
ObjectExpr	An object literal, containing zero or more property definitions.
OptionalChainRoot	INTERNAL: This class should not be used by queries.
OptionalUse	A call or member access that evaluates to `undefined` if its base operand evaluates to `undefined` or `null`.
ParExpr	A parenthesized expression.
PlusExpr	A unary plus expression.
PostDecExpr	A postfix decrement expression.
PostIncExpr	A postfix increment expression.
PreDecExpr	A prefix decrement expression.
PreIncExpr	A prefix increment expression.
PropAccess	A property access, that is, either a dot expression of the form `e.f` or an index expression of the form `e[p]`.
Property	A property definition in an object literal, which may be either a value property, a property getter, or a property setter.
PropertyAccessor	A property getter or setter in an object literal.
PropertyGetter	A property getter in an object literal.
PropertySetter	A property setter in an object literal.
RShiftExpr	A right-shift expression using `>>`.
RegExpLiteral	A regular expression literal.
RelationalComparison	A relational comparison using `<`, `<=`, `>=`, or `>`.
SeqExpr	A sequence expression (also known as comma expression).
ShiftExpr	A shift expression.
SpreadElement	A spread element.
SpreadProperty	A spread property in an object literal.
StrictEqExpr	A strict equality test using `===`.
StrictEqualityTest	A strict equality test using `!==` or `===`.
StrictNEqExpr	A strict inequality test using `!==`.
StringLiteral	A string literal, either single-quoted or double-quoted.
SubExpr	A subtraction expression.
ThisExpr	A `this` expression.
TypeofExpr	A `typeof` expression.
URShiftExpr	An unsigned right-shift expression using `>>>`.
UnaryExpr	An expression with a unary operator.
UpdateExpr	An update expression, that is, an increment or decrement expression.
ValueProperty	A value property definition in an object literal.
VoidExpr	A `void` expression.
XOrExpr	An exclusive ‘or’ expression.
YieldExpr	A `yield` expression.