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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 = {
/**
* reading a class
* ```ebnf
* class ::= class_scope? T_CLASS T_STRING (T_EXTENDS NAMESPACE_NAME)? (T_IMPLEMENTS (NAMESPACE_NAME ',')* NAMESPACE_NAME)? '{' CLASS_BODY '}'
* ```
*/
read_class: function(flag) {
var result = this.node('class');
this.expect(this.tok.T_CLASS);
this.next().expect(this.tok.T_STRING);
var propName = this.text()
, propExtends = null
, propImplements = null
, body
;
if (this.next().token == this.tok.T_EXTENDS) {
propExtends = this.next().read_namespace_name();
}
if (this.token == this.tok.T_IMPLEMENTS) {
propImplements = this.next().read_name_list();
}
this.expect('{');
body = this.nextWithComments().read_class_body();
return result(
propName
,propExtends
,propImplements
,body
,flag
);
}
/**
* Read the class visibility
* ```ebnf
* class_scope ::= (T_FINAL | T_ABSTRACT)?
* ```
*/
,read_class_scope: function() {
var result = this.token;
if (result == this.tok.T_FINAL) {
this.next();
return [0, 0, 2];
} else Eif (result == this.tok.T_ABSTRACT) {
this.next();
return [0, 0, 1];
}
return [0, 0, 0];
}
/**
* Reads a class body
* ```ebnf
* class_body ::= (member_flags? (T_VAR | T_STRING | T_FUNCTION))*
* ```
*/
,read_class_body: function() {
var result = [];
while(this.token !== this.EOF && this.token !== '}') {
if (this.token === this.tok.T_COMMENT) {
result.push(this.read_comment());
continue;
}
if (this.token === this.tok.T_DOC_COMMENT) {
result.push(this.read_doc_comment());
continue;
}
// check T_USE trait
if (this.token === this.tok.T_USE) {
result = result.concat(
this.next().read_trait_use_statement()
);
continue;
}
// read member flags
var flags = this.read_member_flags(false);
// check constant
if (this.token === this.tok.T_CONST) {
var constants = this.read_constant_list(flags);
this.expect(';');
this.nextWithComments();
result = result.concat(constants);
continue;
}
// jump over T_VAR then land on T_VARIABLE
if (this.token === this.tok.T_VAR) {
this.next().expect(this.tok.T_VARIABLE);
flags[0] = flags[1] = 0; // public & non static var
}
if (this.token === this.tok.T_VARIABLE) {
// reads a variable
var variables = this.read_variable_list(flags);
this.expect(';');
this.nextWithComments();
result = result.concat(variables);
} else if (this.token === this.tok.T_FUNCTION) {
// reads a function
result.push(this.read_function(false, flags));
} else {
// raise an error
this.error([
this.tok.T_CONST,
this.tok.T_VARIABLE,
this.tok.T_FUNCTION
]);
// ignore token
this.next();
}
}
this.expect('}');
this.nextWithComments();
return result;
}
/**
* Reads variable list
* ```ebnf
* variable_list ::= (variable_declaration ',')* variable_declaration
* ```
*/
,read_variable_list: function(flags) {
return this.read_list(
/**
* Reads a variable declaration
*
* ```ebnf
* variable_declaration ::= T_VARIABLE '=' scalar
* ```
*/
function read_variable_declaration() {
var result = this.node('property');
this.expect(this.tok.T_VARIABLE);
var name = this.text().substring(1); // ignore $
this.next();
if (this.token === ';' || this.token === ',') {
return result(name, null, flags);
} else Eif(this.token === '=') {
// https://github.com/php/php-src/blob/master/Zend/zend_language_parser.y#L815
return result(name, this.next().read_expr(), flags);
} else {
this.expect([',', ';', '=']);
return result(name, null, flags);
}
}, ','
);
}
/**
* Reads constant list
* ```ebnf
* constant_list ::= T_CONST (constant_declaration ',')* constant_declaration
* ```
*/
,read_constant_list: function(flags) {
Eif (this.expect(this.tok.T_CONST)) {
this.next();
}
return this.read_list(
/**
* Reads a constant declaration
*
* ```ebnf
* constant_declaration ::= T_STRING '=' expr
* ```
* @return {Constant} [:link:](AST.md#constant)
*/
function read_constant_declaration() {
var result = this.node('classconstant'), name = null, value = null;
Eif (this.expect(this.tok.T_STRING)) {
name = this.text();
this.next();
}
Eif (this.expect('=')) {
value = this.next().read_expr();
}
return result(name, value, flags);
}, ','
)
;
}
/**
* Read member flags
* @return array
* 1st index : 0 => public, 1 => protected, 2 => private
* 2nd index : 0 => instance member, 1 => static member
* 3rd index : 0 => normal, 1 => abstract member, 2 => final member
*/
,read_member_flags: function(asInterface) {
var result = [-1, -1, -1];
if (this.is('T_MEMBER_FLAGS')) {
var idx = 0, val = 0;
do {
switch(this.token) {
case this.tok.T_PUBLIC: idx = 0; val = 0; break;
case this.tok.T_PROTECTED: idx = 0; val = 1; break;
case this.tok.T_PRIVATE: idx = 0; val = 2; break;
case this.tok.T_STATIC: idx = 1; val = 1; break;
case this.tok.T_ABSTRACT: idx = 2; val = 1; break;
case this.tok.T_FINAL: idx = 2; val = 2; break;
}
if (asInterface) {
Iif (idx == 0 && val == 2) {
// an interface can't be private
this.expect([this.tok.T_PUBLIC, this.tok.T_PROTECTED]);
val = -1;
} else if (idx == 2 && val == 1) {
// an interface cant be abstract
this.error();
val = -1;
}
}
Iif (result[idx] !== -1) {
// already defined flag
this.error();
} else if (val !== -1) {
result[idx] = val;
}
} while(this.next().is('T_MEMBER_FLAGS'));
}
if (result[0] == -1) result[0] = 0;
if (result[1] == -1) result[1] = 0;
if (result[2] == -1) result[2] = 0;
return result;
}
/**
* reading an interface
* ```ebnf
* interface ::= T_INTERFACE T_STRING (T_EXTENDS (NAMESPACE_NAME ',')* NAMESPACE_NAME)? '{' INTERFACE_BODY '}'
* ```
*/
,read_interface: function() {
var result = this.node('interface'), name = null, body = null, propExtends = null;
Eif (this.expect(this.tok.T_INTERFACE)) {
this.next();
}
Eif (this.expect(this.tok.T_STRING)) {
name = this.text();
this.next();
}
if (this.token === this.tok.T_EXTENDS) {
propExtends = this.next().read_name_list();
}
Eif (this.expect('{')) {
body = this.next().read_interface_body();
}
return result(name, propExtends, body);
}
/**
* Reads an interface body
* ```ebnf
* interface_body ::= (member_flags? (T_CONST | T_FUNCTION))*
* ```
*/
,read_interface_body: function() {
var result = [];
while(this.token !== this.EOF && this.token !== '}') {
Iif (this.token === this.tok.T_COMMENT) {
result.push(this.read_comment());
continue;
}
if (this.token === this.tok.T_DOC_COMMENT) {
result.push(this.read_doc_comment());
continue;
}
// read member flags
var flags = this.read_member_flags(true);
// check constant
if (this.token == this.tok.T_CONST) {
var constants = this.read_constant_list(flags);
Eif (this.expect(';')) {
this.nextWithComments();
}
result = result.concat(constants);
}
// reads a function
else Eif (this.token === this.tok.T_FUNCTION) {
var method = this.read_function_declaration(2, flags);
method.parseFlags(flags);
result.push(method);
if (this.expect(';')) {
this.nextWithComments();
}
} else {
// raise an error
this.error([
this.tok.T_CONST,
this.tok.T_FUNCTION
]);
this.next();
}
}
if (this.expect('}')) {
this.next();
}
return result;
}
/**
* reading a trait
* ```ebnf
* trait ::= T_TRAIT T_STRING (T_EXTENDS (NAMESPACE_NAME ',')* NAMESPACE_NAME)? '{' FUNCTION* '}'
* ```
*/
,read_trait: function(flag) {
var result = this.node('trait'),
propName = null,
propExtends = null,
propImplements = null,
body = null;
Eif (this.expect(this.tok.T_TRAIT)) {
this.next();
}
Eif (this.expect(this.tok.T_STRING)) {
propName = this.text();
}
if (this.next().token == this.tok.T_EXTENDS) {
propExtends = this.next().read_namespace_name();
}
if (this.token == this.tok.T_IMPLEMENTS) {
propImplements = this.next().read_name_list();
}
Eif (this.expect('{')) {
body = this.next().read_class_body();
}
return result(
propName,
propExtends,
propImplements,
body
);
}
/**
* reading a use statement
* ```ebnf
* trait_use_statement ::= namespace_name (',' namespace_name)* ('{' trait_use_alias '}')?
* ```
*/
,read_trait_use_statement: function() {
// defines use statements
var node = this.node('traituse');
var traits = [this.read_namespace_name()];
var adaptations = null;
while(this.token === ',') {
traits.push(
this.next().read_namespace_name()
);
}
if (this.token === '{') {
adaptations = [];
// defines alias statements
while(this.next().token !== this.EOF) {
if (this.token === '}') break;
adaptations.push(this.read_trait_use_alias());
this.expect(';');
}
Eif (this.expect('}')) {
this.nextWithComments();
}
} else {
if (this.expect(';')) {
this.nextWithComments();
}
}
return node(traits, adaptations);
}
/**
* Reading trait alias
* ```ebnf
* trait_use_alias ::= namespace_name ( T_DOUBLE_COLON T_STRING )? (T_INSTEADOF namespace_name) | (T_AS member_flags? T_STRING)
* ```
*/
,read_trait_use_alias: function() {
var node = this.node();
var trait = null;
var method = this.read_namespace_name();
if (this.token === this.tok.T_DOUBLE_COLON) {
Eif (this.next().expect(this.tok.T_STRING)) {
trait = method;
method = this.text();
this.next();
}
} else {
// convert identifier as string
method = method.name;
}
// handle trait precedence
if (this.token === this.tok.T_INSTEADOF) {
return node(
'traitprecedence',
trait, method,
this.next().read_name_list()
);
}
// handle trait alias
else if (this.token === this.tok.T_AS) {
var flags = false;
var alias = null;
if (this.next().is('T_MEMBER_FLAGS')) {
flags = this.read_member_flags();
}
Eif (this.token === this.tok.T_STRING) {
alias = this.text();
this.next();
} else if (flags === false) {
// no visibility flags and no name => too bad
this.expect(this.tok.T_STRING);
}
return node('traitalias', trait, method, alias, flags)
}
// handle errors
this.expect([this.tok.T_AS, this.tok.T_INSTEADOF]);
return node('traitalias', trait, method, null, null);
}
};
|