Expr class

An abstract representation of a common expression.

Expressions are abstractly represented as a collection of identifiers, select statements, function calls, literals, and comprehensions. All operators with the exception of the '.' operator are modelled as function calls. This makes it easy to represent new operators into the existing AST.

All references within expressions must resolve to a google.api.expr.v1alpha1.Decl provided at type-check for an expression to be valid. A reference may either be a bare identifier name or a qualified identifier google.api.name. References may either refer to a value or a function declaration.

For example, the expression google.api.name.startsWith('expr') references the declaration google.api.name within a google.api.expr.v1alpha1.Expr.Select expression, and the function declaration startsWith.

Available extensions

GeneratedMessageGenericExtensions

Constructors

Expr({Int64? id, Constant? constExpr, Expr_Ident? identExpr, Expr_Select? selectExpr, Expr_Call? callExpr, Expr_CreateList? listExpr, Expr_CreateStruct? structExpr, Expr_Comprehension? comprehensionExpr}): factory
Expr.fromBuffer(List<int> data, [ExtensionRegistry registry = $pb.ExtensionRegistry.EMPTY]): factory
Expr.fromJson(String json, [ExtensionRegistry registry = $pb.ExtensionRegistry.EMPTY]): factory

Properties

callExpr ↔ Expr_Call: A call expression, including calls to predefined functions and operators.
getter/setter pair
comprehensionExpr ↔ Expr_Comprehension: A comprehension expression.
getter/setter pair
constExpr ↔ Constant: A literal expression.
getter/setter pair
hashCode → int: Calculates a hash code based on the contents of the protobuf.
no setterinherited
id ↔ Int64: Required. An id assigned to this node by the parser which is unique in a given expression tree. This is used to associate type information and other attributes to a node in the parse tree.
getter/setter pair
identExpr ↔ Expr_Ident: An identifier expression.
getter/setter pair
info_ → BuilderInfo: no setter
isFrozen → bool: Returns true if this message is marked read-only. Otherwise false.
no setterinherited
listExpr ↔ Expr_CreateList: A list creation expression.
getter/setter pair
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
selectExpr ↔ Expr_Select: A field selection expression, e.g. request.auth.
getter/setter pair
structExpr ↔ Expr_CreateStruct: A map or message creation expression.
getter/setter pair
unknownFields → UnknownFieldSet: no setterinherited

Methods

addExtension(Extension extension, Object? value) → void: Adds an extension field value to a repeated field.
inherited
check() → void: Throws a StateError if the message has required fields without a value.
inherited
clear() → void: Clears all data that was set in this message.
inherited
clearCallExpr() → void
clearComprehensionExpr() → void
clearConstExpr() → void
clearExprKind() → void
clearExtension(Extension extension) → void: Clears an extension field and also removes the extension.
inherited
clearField(int tagNumber) → void: Clears the contents of a given field.
inherited
clearId() → void
clearIdentExpr() → void
clearListExpr() → void
clearSelectExpr() → void
clearStructExpr() → void
clone() → Expr: Creates a deep copy of the fields in this message. (The generated code uses mergeFromMessage.)
copyWith(void updates(Expr)) → Expr: Apply updates to a copy of this message.
createEmptyInstance() → Expr: Creates an empty instance of the same message type as this.
deepCopy() → T: Available on T, provided by the GeneratedMessageGenericExtensions extension
Returns a writable deep copy of this message.
ensureCallExpr() → Expr_Call
ensureComprehensionExpr() → Expr_Comprehension
ensureConstExpr() → Constant
ensureIdentExpr() → Expr_Ident
ensureListExpr() → Expr_CreateList
ensureSelectExpr() → Expr_Select
ensureStructExpr() → Expr_CreateStruct
extensionsAreInitialized() → bool: inherited
freeze() → GeneratedMessage: Make this message read-only.
inherited
getDefaultForField(int tagNumber) → dynamic: Returns the default value for the given field.
inherited
getExtension(Extension extension) → dynamic: Returns the value of extension.
inherited
getField(int tagNumber) → dynamic: Returns the value of the field associated with tagNumber, or the default value if it is not set.
inherited
getFieldOrNull(int tagNumber) → dynamic: Returns the value of a field, ignoring any defaults.
inherited
getTagNumber(String fieldName) → int?: inherited
hasCallExpr() → bool
hasComprehensionExpr() → bool
hasConstExpr() → bool
hasExtension(Extension extension) → bool: Returns true if a value of extension is present.
inherited
hasField(int tagNumber) → bool: Whether this message has a field associated with tagNumber.
inherited
hasId() → bool
hasIdentExpr() → bool
hasListExpr() → bool
hasRequiredFields() → bool: Whether the message has required fields.
inherited
hasSelectExpr() → bool
hasStructExpr() → bool
isInitialized() → bool: Whether all required fields in the message and embedded messages are set.
inherited
mergeFromBuffer(List<int> input, [ExtensionRegistry extensionRegistry = ExtensionRegistry.EMPTY]) → void: Merges serialized protocol buffer data into this message.
inherited
mergeFromCodedBufferReader(CodedBufferReader input, [ExtensionRegistry extensionRegistry = ExtensionRegistry.EMPTY]) → void: Same as mergeFromBuffer, but takes a CodedBufferReader input.
inherited
mergeFromJson(String data, [ExtensionRegistry extensionRegistry = ExtensionRegistry.EMPTY]) → void: Merges field values from data, a JSON object, encoded as described by GeneratedMessage.writeToJson.
inherited
mergeFromJsonMap(Map<String, dynamic> json, [ExtensionRegistry extensionRegistry = ExtensionRegistry.EMPTY]) → void: Merges field values from a JSON object represented as a Dart map.
inherited
mergeFromMessage(GeneratedMessage other) → void: Merges the contents of the other into this message.
inherited
mergeFromProto3Json(Object? json, {TypeRegistry typeRegistry = const TypeRegistry.empty(), bool ignoreUnknownFields = false, bool supportNamesWithUnderscores = true, bool permissiveEnums = false}) → void: Merges field values from json, a JSON object using proto3 encoding.
inherited
mergeUnknownFields(UnknownFieldSet unknownFieldSet) → void: inherited
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
rebuild(void updates(T)) → T: Available on T, provided by the GeneratedMessageGenericExtensions extension
Apply updates to a copy of this message.
setExtension(Extension extension, Object value) → void: Sets the value of a non-repeated extension field to value.
inherited
setField(int tagNumber, Object value) → void: Sets the value of a field by its tagNumber.
inherited
toBuilder() → GeneratedMessage: Creates a writable, shallow copy of this message.
inherited
toDebugString() → String: Returns a String representation of this message.
inherited
toProto3Json({TypeRegistry typeRegistry = const TypeRegistry.empty()}) → Object?: Returns an Object representing Proto3 JSON serialization of this.
inherited
toString() → String: Returns a String representation of this message.
inherited
whichExprKind() → Expr_ExprKind
writeToBuffer() → Uint8List: Serialize the message as the protobuf binary format.
inherited
writeToCodedBufferWriter(CodedBufferWriter output) → void: Same as writeToBuffer, but serializes to the given CodedBufferWriter.
inherited
writeToJson() → String: Returns a JSON string that encodes this message.
inherited
writeToJsonMap() → Map<String, dynamic>: Returns the JSON encoding of this message as a Dart Map.
inherited

Operators

operator ==(Object other) → bool: The equality operator.
inherited

Static Methods

create() → Expr
createRepeated() → PbList<Expr>
getDefault() → Expr