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| /*!
* Copyright (C) 2017 Glayzzle (BSD3 License)
* @authors https://github.com/glayzzle/php-parser/graphs/contributors
* @url http://glayzzle.com
*/
module.exports = {
/**
* checks if current token is a reference keyword
*/
is_reference: function() {
if (this.token == '&') {
this.next();
return true;
}
return false;
}
/**
* checks if current token is a variadic keyword
*/
,is_variadic: function() {
if (this.token === this.tok.T_ELLIPSIS) {
this.next();
return true;
}
return false;
}
/**
* reading a function
* ```ebnf
* function ::= function_declaration code_block
* ```
*/
,read_function: function(closure, flag) {
var result = this.read_function_declaration(
closure ? 1 : (flag ? 2 : 0)
);
if (flag && flag[2] == 1) {
// abstract function :
result.parseFlags(flag);
Eif (this.expect(';')) {
this.nextWithComments();
}
} else {
Eif (this.expect('{')) {
result.body = this.read_code_block(false);
Iif (result.loc && result.body.loc) {
result.loc.end = result.body.loc.end;
}
}
if (flag) {
result.parseFlags(flag);
}
}
return result;
}
/**
* reads a function declaration (without his body)
* ```ebnf
* function_declaration ::= T_FUNCTION '&'? T_STRING '(' parameter_list ')'
* ```
*/
,read_function_declaration: function(type) {
var nodeName = 'function';
if (type === 1) {
nodeName = 'closure';
} else if (type === 2) {
nodeName = 'method';
}
var result = this.node(nodeName);
Eif (this.expect(this.tok.T_FUNCTION)) {
this.next();
}
var isRef = this.is_reference();
var name = false, use = [], returnType = null, nullable = false;
if (type !== 1) {
Eif (this.expect(this.tok.T_STRING)) {
name = this.text();
this.next();
}
}
Eif (this.expect('(')) this.next();
var params = this.read_parameter_list();
Eif (this.expect(')')) this.next();
if (type === 1 && this.token === this.tok.T_USE) {
Eif (this.next().expect('(')) this.next();
use = this.read_list(this.read_lexical_var, ',');
Eif (this.expect(')')) this.next();
}
if (this.token === ':') {
if (this.next().token === '?') {
nullable = true;
this.next();
}
returnType = this.read_type();
}
if (type === 1) {
// closure
return result(params, isRef, use, returnType, nullable);
}
return result(name, params, isRef, returnType, nullable);
}
/**
* ```ebnf
* lexical_var ::= '&'? T_VARIABLE
* ```
*/
,read_lexical_var: function() {
var result = this.node('variable');
var isRef = false;
if (this.token === '&') {
isRef = true;
this.next();
}
this.expect(this.tok.T_VARIABLE);
var name = this.text().substring(1);
this.next();
return result(name, isRef);
}
/**
* reads a list of parameters
* ```ebnf
* parameter_list ::= (parameter ',')* parameter?
* ```
*/
,read_parameter_list: function() {
var result = [];
if (this.token != ')') {
while(this.token != this.EOF) {
result.push(this.read_parameter());
if (this.token == ',') {
this.next();
} else Eif (this.token == ')') {
break;
} else {
this.error([',', ')']);
break;
}
}
}
return result;
}
/**
* ```ebnf
* parameter ::= type? '&'? T_ELLIPSIS? T_VARIABLE ('=' expr)?
* ```
* @see https://github.com/php/php-src/blob/493524454d66adde84e00d249d607ecd540de99f/Zend/zend_language_parser.y#L640
*/
,read_parameter: function() {
var node = this.node('parameter'),
name = null,
value = null,
type = null,
nullable = false;
if (this.token === '?') {
this.next();
nullable = true;
}
type = this.read_type();
Iif (nullable && !type) {
this.raiseError('Expecting a type definition combined with nullable operator');
}
var isRef = this.is_reference();
var isVariadic = this.is_variadic();
Eif (this.expect(this.tok.T_VARIABLE)) {
name = this.text().substring(1);
this.next();
}
if (this.token == '=') {
value = this.next().read_expr();
}
return node(name, type, value, isRef, isVariadic, nullable);
}
/**
* Reads a list of arguments
* ```ebnf
* function_argument_list ::= '(' (argument_list (',' argument_list)*)? ')'
* ```
*/
,read_function_argument_list: function() {
var result = [];
var wasVariadic = false;
this.expect('(') && this.next();
if (this.token !== ')') {
while(this.token != this.EOF) {
var argument = this.read_argument_list();
if (argument) {
result.push(argument);
if (argument.kind === 'variadic') {
wasVariadic = true;
} else if (wasVariadic) {
this.raiseError('Unexpected argument after a variadic argument');
}
}
if (this.token === ',') {
this.next();
} else break;
}
}
this.expect(')') && this.next();
return result;
}
/**
* ```ebnf
* argument_list ::= T_ELLIPSIS? expr
* ```
*/
,read_argument_list: function() {
if (this.token === this.tok.T_ELLIPSIS ) {
return this.node('variadic')(this.next().read_expr());
}
return this.read_expr();
}
/**
* read type hinting
* ```ebnf
* type ::= T_ARRAY | T_CALLABLE | namespace_name
* ```
*/
,read_type: function() {
var result = this.node('identifier');
switch(this.token) {
case this.tok.T_ARRAY:
this.next();
return result(['', 'array'], false);
case this.tok.T_NAMESPACE:
case this.tok.T_NS_SEPARATOR:
case this.tok.T_STRING:
return this.read_namespace_name();
case this.tok.T_CALLABLE:
this.next();
return result(['', 'callable'], false);
default:
return null;
}
}
};
|