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require("./core");
var types = require("../lib/types");
var def = types.Type.def;
var or = types.Type.or;
var defaults = require("../lib/shared").defaults;
def("Function")
.field("generator", Boolean, defaults["false"])
.field("expression", Boolean, defaults["false"])
.field("defaults", [or(def("Expression"), null)], defaults.emptyArray)
// TODO This could be represented as a RestElement in .params.
.field("rest", or(def("Identifier"), null), defaults["null"]);
// The ESTree way of representing a ...rest parameter.
def("RestElement")
.bases("Pattern")
.build("argument")
.field("argument", def("Pattern"));
def("SpreadElementPattern")
.bases("Pattern")
.build("argument")
.field("argument", def("Pattern"));
def("FunctionDeclaration")
.build("id", "params", "body", "generator", "expression");
def("FunctionExpression")
.build("id", "params", "body", "generator", "expression");
// The Parser API calls this ArrowExpression, but Esprima and all other
// actual parsers use ArrowFunctionExpression.
def("ArrowFunctionExpression")
.bases("Function", "Expression")
.build("params", "body", "expression")
// The forced null value here is compatible with the overridden
// definition of the "id" field in the Function interface.
.field("id", null, defaults["null"])
// Arrow function bodies are allowed to be expressions.
.field("body", or(def("BlockStatement"), def("Expression")))
// The current spec forbids arrow generators, so I have taken the
// liberty of enforcing that. TODO Report this.
.field("generator", false, defaults["false"]);
def("YieldExpression")
.bases("Expression")
.build("argument", "delegate")
.field("argument", or(def("Expression"), null))
.field("delegate", Boolean, defaults["false"]);
def("GeneratorExpression")
.bases("Expression")
.build("body", "blocks", "filter")
.field("body", def("Expression"))
.field("blocks", [def("ComprehensionBlock")])
.field("filter", or(def("Expression"), null));
def("ComprehensionExpression")
.bases("Expression")
.build("body", "blocks", "filter")
.field("body", def("Expression"))
.field("blocks", [def("ComprehensionBlock")])
.field("filter", or(def("Expression"), null));
def("ComprehensionBlock")
.bases("Node")
.build("left", "right", "each")
.field("left", def("Pattern"))
.field("right", def("Expression"))
.field("each", Boolean);
def("Property")
.field("key", or(def("Literal"), def("Identifier"), def("Expression")))
.field("value", or(def("Expression"), def("Pattern")))
.field("method", Boolean, defaults["false"])
.field("shorthand", Boolean, defaults["false"])
.field("computed", Boolean, defaults["false"]);
def("PropertyPattern")
.bases("Pattern")
.build("key", "pattern")
.field("key", or(def("Literal"), def("Identifier"), def("Expression")))
.field("pattern", def("Pattern"))
.field("computed", Boolean, defaults["false"]);
def("ObjectPattern")
.bases("Pattern")
.build("properties")
.field("properties", [or(def("PropertyPattern"), def("Property"))]);
def("ArrayPattern")
.bases("Pattern")
.build("elements")
.field("elements", [or(def("Pattern"), null)]);
def("MethodDefinition")
.bases("Declaration")
.build("kind", "key", "value", "static")
.field("kind", or("constructor", "method", "get", "set"))
.field("key", or(def("Literal"), def("Identifier"), def("Expression")))
.field("value", def("Function"))
.field("computed", Boolean, defaults["false"])
.field("static", Boolean, defaults["false"]);
def("SpreadElement")
.bases("Node")
.build("argument")
.field("argument", def("Expression"));
def("ArrayExpression")
.field("elements", [or(
def("Expression"),
def("SpreadElement"),
def("RestElement"),
null
)]);
def("NewExpression")
.field("arguments", [or(def("Expression"), def("SpreadElement"))]);
def("CallExpression")
.field("arguments", [or(def("Expression"), def("SpreadElement"))]);
// Note: this node type is *not* an AssignmentExpression with a Pattern on
// the left-hand side! The existing AssignmentExpression type already
// supports destructuring assignments. AssignmentPattern nodes may appear
// wherever a Pattern is allowed, and the right-hand side represents a
// default value to be destructured against the left-hand side, if no
// value is otherwise provided. For example: default parameter values.
def("AssignmentPattern")
.bases("Pattern")
.build("left", "right")
.field("left", def("Pattern"))
.field("right", def("Expression"));
var ClassBodyElement = or(
def("MethodDefinition"),
def("VariableDeclarator"),
def("ClassPropertyDefinition"),
def("ClassProperty")
);
def("ClassProperty")
.bases("Declaration")
.build("key")
.field("key", or(def("Literal"), def("Identifier"), def("Expression")))
.field("computed", Boolean, defaults["false"]);
def("ClassPropertyDefinition") // static property
.bases("Declaration")
.build("definition")
// Yes, Virginia, circular definitions are permitted.
.field("definition", ClassBodyElement);
def("ClassBody")
.bases("Declaration")
.build("body")
.field("body", [ClassBodyElement]);
def("ClassDeclaration")
.bases("Declaration")
.build("id", "body", "superClass")
.field("id", or(def("Identifier"), null))
.field("body", def("ClassBody"))
.field("superClass", or(def("Expression"), null), defaults["null"]);
def("ClassExpression")
.bases("Expression")
.build("id", "body", "superClass")
.field("id", or(def("Identifier"), null), defaults["null"])
.field("body", def("ClassBody"))
.field("superClass", or(def("Expression"), null), defaults["null"])
.field("implements", [def("ClassImplements")], defaults.emptyArray);
def("ClassImplements")
.bases("Node")
.build("id")
.field("id", def("Identifier"))
.field("superClass", or(def("Expression"), null), defaults["null"]);
// Specifier and ModuleSpecifier are abstract non-standard types
// introduced for definitional convenience.
def("Specifier").bases("Node");
// This supertype is shared/abused by both def/babel.js and
// def/esprima.js. In the future, it will be possible to load only one set
// of definitions appropriate for a given parser, but until then we must
// rely on default functions to reconcile the conflicting AST formats.
def("ModuleSpecifier")
.bases("Specifier")
// This local field is used by Babel/Acorn. It should not technically
// be optional in the Babel/Acorn AST format, but it must be optional
// in the Esprima AST format.
.field("local", or(def("Identifier"), null), defaults["null"])
// The id and name fields are used by Esprima. The id field should not
// technically be optional in the Esprima AST format, but it must be
// optional in the Babel/Acorn AST format.
.field("id", or(def("Identifier"), null), defaults["null"])
.field("name", or(def("Identifier"), null), defaults["null"]);
def("TaggedTemplateExpression")
.bases("Expression")
.build("tag", "quasi")
.field("tag", def("Expression"))
.field("quasi", def("TemplateLiteral"));
def("TemplateLiteral")
.bases("Expression")
.build("quasis", "expressions")
.field("quasis", [def("TemplateElement")])
.field("expressions", [def("Expression")]);
def("TemplateElement")
.bases("Node")
.build("value", "tail")
.field("value", {"cooked": String, "raw": String})
.field("tail", Boolean);
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