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rf-web/vendor/bundle/gems/sassc-2.2.1/ext/libsass/src/ast.hpp
Benjamin Jones 181282327b initialise repo with jekyll
2019-10-21 10:18:17 +02:00

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#ifndef SASS_AST_H
#define SASS_AST_H
// sass.hpp must go before all system headers to get the
// __EXTENSIONS__ fix on Solaris.
#include "sass.hpp"
#include <set>
#include <deque>
#include <vector>
#include <string>
#include <sstream>
#include <iostream>
#include <typeinfo>
#include <algorithm>
#include "sass/base.h"
#include "ast_fwd_decl.hpp"
#include "util.hpp"
#include "units.hpp"
#include "context.hpp"
#include "position.hpp"
#include "constants.hpp"
#include "operation.hpp"
#include "position.hpp"
#include "inspect.hpp"
#include "source_map.hpp"
#include "environment.hpp"
#include "error_handling.hpp"
#include "ast_def_macros.hpp"
#include "ast_fwd_decl.hpp"
#include "source_map.hpp"
#include "fn_utils.hpp"
#include "sass.h"
namespace Sass {
// easier to search with name
const bool DELAYED = true;
// ToDo: should this really be hardcoded
// Note: most methods follow precision option
const double NUMBER_EPSILON = 1e-12;
// macro to test if numbers are equal within a small error margin
#define NEAR_EQUAL(lhs, rhs) std::fabs(lhs - rhs) < NUMBER_EPSILON
// ToDo: where does this fit best?
// We don't share this with C-API?
class Operand {
public:
Operand(Sass_OP operand, bool ws_before = false, bool ws_after = false)
: operand(operand), ws_before(ws_before), ws_after(ws_after)
{ }
public:
enum Sass_OP operand;
bool ws_before;
bool ws_after;
};
//////////////////////////////////////////////////////////
// `hash_combine` comes from boost (functional/hash):
// http://www.boost.org/doc/libs/1_35_0/doc/html/hash/combine.html
// Boost Software License - Version 1.0
// http://www.boost.org/users/license.html
template <typename T>
void hash_combine (std::size_t& seed, const T& val)
{
seed ^= std::hash<T>()(val) + 0x9e3779b9
+ (seed<<6) + (seed>>2);
}
//////////////////////////////////////////////////////////
const char* sass_op_to_name(enum Sass_OP op);
const char* sass_op_separator(enum Sass_OP op);
//////////////////////////////////////////////////////////
// Abstract base class for all abstract syntax tree nodes.
//////////////////////////////////////////////////////////
class AST_Node : public SharedObj {
ADD_PROPERTY(ParserState, pstate)
public:
AST_Node(ParserState pstate)
: pstate_(pstate)
{ }
AST_Node(const AST_Node* ptr)
: pstate_(ptr->pstate_)
{ }
// allow implicit conversion to string
// needed for by SharedPtr implementation
operator std::string() {
return to_string();
}
// AST_Node(AST_Node& ptr) = delete;
virtual ~AST_Node() = 0;
virtual size_t hash() const { return 0; }
virtual std::string inspect() const { return to_string({ INSPECT, 5 }); }
virtual std::string to_sass() const { return to_string({ TO_SASS, 5 }); }
virtual const std::string to_string(Sass_Inspect_Options opt) const;
virtual const std::string to_string() const;
virtual void cloneChildren() {};
// generic find function (not fully implemented yet)
// ToDo: add specific implementions to all children
virtual bool find ( bool (*f)(AST_Node_Obj) ) { return f(this); };
void update_pstate(const ParserState& pstate);
Offset off() { return pstate(); }
Position pos() { return pstate(); }
ATTACH_ABSTRACT_AST_OPERATIONS(AST_Node);
ATTACH_ABSTRACT_CRTP_PERFORM_METHODS()
};
inline AST_Node::~AST_Node() { }
//////////////////////////////////////////////////////////////////////
// define cast template now (need complete type)
//////////////////////////////////////////////////////////////////////
template<class T>
T* Cast(AST_Node* ptr) {
return ptr && typeid(T) == typeid(*ptr) ?
static_cast<T*>(ptr) : NULL;
};
template<class T>
const T* Cast(const AST_Node* ptr) {
return ptr && typeid(T) == typeid(*ptr) ?
static_cast<const T*>(ptr) : NULL;
};
//////////////////////////////////////////////////////////////////////
// Abstract base class for expressions. This side of the AST hierarchy
// represents elements in value contexts, which exist primarily to be
// evaluated and returned.
//////////////////////////////////////////////////////////////////////
class Expression : public AST_Node {
public:
enum Type {
NONE,
BOOLEAN,
NUMBER,
COLOR,
STRING,
LIST,
MAP,
SELECTOR,
NULL_VAL,
FUNCTION_VAL,
C_WARNING,
C_ERROR,
FUNCTION,
VARIABLE,
PARENT,
NUM_TYPES
};
private:
// expressions in some contexts shouldn't be evaluated
ADD_PROPERTY(bool, is_delayed)
ADD_PROPERTY(bool, is_expanded)
ADD_PROPERTY(bool, is_interpolant)
ADD_PROPERTY(Type, concrete_type)
public:
Expression(ParserState pstate, bool d = false, bool e = false, bool i = false, Type ct = NONE);
virtual operator bool() { return true; }
virtual ~Expression() { }
virtual bool is_invisible() const { return false; }
virtual std::string type() const { return ""; }
static std::string type_name() { return ""; }
virtual bool is_false() { return false; }
// virtual bool is_true() { return !is_false(); }
virtual bool operator< (const Expression& rhs) const { return false; }
virtual bool operator== (const Expression& rhs) const { return false; }
inline bool operator>(const Expression& rhs) const { return rhs < *this; }
inline bool operator!=(const Expression& rhs) const { return !(rhs == *this); }
virtual bool eq(const Expression& rhs) const { return *this == rhs; };
virtual void set_delayed(bool delayed) { is_delayed(delayed); }
virtual bool has_interpolant() const { return is_interpolant(); }
virtual bool is_left_interpolant() const { return is_interpolant(); }
virtual bool is_right_interpolant() const { return is_interpolant(); }
ATTACH_VIRTUAL_AST_OPERATIONS(Expression);
size_t hash() const override { return 0; }
};
}
/////////////////////////////////////////////////////////////////////////////////////
// Hash method specializations for std::unordered_map to work with Sass::Expression
/////////////////////////////////////////////////////////////////////////////////////
namespace std {
template<>
struct hash<Sass::Expression_Obj>
{
size_t operator()(Sass::Expression_Obj s) const
{
return s->hash();
}
};
template<>
struct equal_to<Sass::Expression_Obj>
{
bool operator()( Sass::Expression_Obj lhs, Sass::Expression_Obj rhs) const
{
return lhs->hash() == rhs->hash();
}
};
}
namespace Sass {
/////////////////////////////////////////////////////////////////////////////
// Mixin class for AST nodes that should behave like vectors. Uses the
// "Template Method" design pattern to allow subclasses to adjust their flags
// when certain objects are pushed.
/////////////////////////////////////////////////////////////////////////////
template <typename T>
class Vectorized {
std::vector<T> elements_;
protected:
mutable size_t hash_;
void reset_hash() { hash_ = 0; }
virtual void adjust_after_pushing(T element) { }
public:
Vectorized(size_t s = 0) : hash_(0)
{ elements_.reserve(s); }
virtual ~Vectorized() = 0;
size_t length() const { return elements_.size(); }
bool empty() const { return elements_.empty(); }
void clear() { return elements_.clear(); }
T last() const { return elements_.back(); }
T first() const { return elements_.front(); }
T& operator[](size_t i) { return elements_[i]; }
virtual const T& at(size_t i) const { return elements_.at(i); }
virtual T& at(size_t i) { return elements_.at(i); }
const T& get(size_t i) const { return elements_[i]; }
const T& operator[](size_t i) const { return elements_[i]; }
virtual void append(T element)
{
if (element) {
reset_hash();
elements_.push_back(element);
adjust_after_pushing(element);
}
}
virtual void concat(Vectorized* v)
{
for (size_t i = 0, L = v->length(); i < L; ++i) this->append((*v)[i]);
}
Vectorized& unshift(T element)
{
elements_.insert(elements_.begin(), element);
return *this;
}
std::vector<T>& elements() { return elements_; }
const std::vector<T>& elements() const { return elements_; }
std::vector<T>& elements(std::vector<T>& e) { elements_ = e; return elements_; }
virtual size_t hash() const
{
if (hash_ == 0) {
for (const T& el : elements_) {
hash_combine(hash_, el->hash());
}
}
return hash_;
}
template <typename P, typename V>
typename std::vector<T>::iterator insert(P position, const V& val) {
reset_hash();
return elements_.insert(position, val);
}
typename std::vector<T>::iterator end() { return elements_.end(); }
typename std::vector<T>::iterator begin() { return elements_.begin(); }
typename std::vector<T>::const_iterator end() const { return elements_.end(); }
typename std::vector<T>::const_iterator begin() const { return elements_.begin(); }
typename std::vector<T>::iterator erase(typename std::vector<T>::iterator el) { return elements_.erase(el); }
typename std::vector<T>::const_iterator erase(typename std::vector<T>::const_iterator el) { return elements_.erase(el); }
};
template <typename T>
inline Vectorized<T>::~Vectorized() { }
/////////////////////////////////////////////////////////////////////////////
// Mixin class for AST nodes that should behave like a hash table. Uses an
// extra <std::vector> internally to maintain insertion order for interation.
/////////////////////////////////////////////////////////////////////////////
class Hashed {
private:
ExpressionMap elements_;
std::vector<Expression_Obj> list_;
protected:
mutable size_t hash_;
Expression_Obj duplicate_key_;
void reset_hash() { hash_ = 0; }
void reset_duplicate_key() { duplicate_key_ = {}; }
virtual void adjust_after_pushing(std::pair<Expression_Obj, Expression_Obj> p) { }
public:
Hashed(size_t s = 0)
: elements_(ExpressionMap(s)),
list_(std::vector<Expression_Obj>()),
hash_(0), duplicate_key_({})
{ elements_.reserve(s); list_.reserve(s); }
virtual ~Hashed();
size_t length() const { return list_.size(); }
bool empty() const { return list_.empty(); }
bool has(Expression_Obj k) const { return elements_.count(k) == 1; }
Expression_Obj at(Expression_Obj k) const;
bool has_duplicate_key() const { return duplicate_key_ != nullptr; }
Expression_Obj get_duplicate_key() const { return duplicate_key_; }
const ExpressionMap elements() { return elements_; }
Hashed& operator<<(std::pair<Expression_Obj, Expression_Obj> p)
{
reset_hash();
if (!has(p.first)) list_.push_back(p.first);
else if (!duplicate_key_) duplicate_key_ = p.first;
elements_[p.first] = p.second;
adjust_after_pushing(p);
return *this;
}
Hashed& operator+=(Hashed* h)
{
if (length() == 0) {
this->elements_ = h->elements_;
this->list_ = h->list_;
return *this;
}
for (auto key : h->keys()) {
*this << std::make_pair(key, h->at(key));
}
reset_duplicate_key();
return *this;
}
const ExpressionMap& pairs() const { return elements_; }
const std::vector<Expression_Obj>& keys() const { return list_; }
// std::unordered_map<Expression_Obj, Expression_Obj>::iterator end() { return elements_.end(); }
// std::unordered_map<Expression_Obj, Expression_Obj>::iterator begin() { return elements_.begin(); }
// std::unordered_map<Expression_Obj, Expression_Obj>::const_iterator end() const { return elements_.end(); }
// std::unordered_map<Expression_Obj, Expression_Obj>::const_iterator begin() const { return elements_.begin(); }
};
inline Hashed::~Hashed() { }
/////////////////////////////////////////////////////////////////////////
// Abstract base class for statements. This side of the AST hierarchy
// represents elements in expansion contexts, which exist primarily to be
// rewritten and macro-expanded.
/////////////////////////////////////////////////////////////////////////
class Statement : public AST_Node {
public:
enum Type {
NONE,
RULESET,
MEDIA,
DIRECTIVE,
SUPPORTS,
ATROOT,
BUBBLE,
CONTENT,
KEYFRAMERULE,
DECLARATION,
ASSIGNMENT,
IMPORT_STUB,
IMPORT,
COMMENT,
WARNING,
RETURN,
EXTEND,
ERROR,
DEBUGSTMT,
WHILE,
EACH,
FOR,
IF
};
private:
ADD_PROPERTY(Type, statement_type)
ADD_PROPERTY(size_t, tabs)
ADD_PROPERTY(bool, group_end)
public:
Statement(ParserState pstate, Type st = NONE, size_t t = 0);
virtual ~Statement() = 0; // virtual destructor
// needed for rearranging nested rulesets during CSS emission
virtual bool bubbles();
virtual bool has_content();
virtual bool is_invisible() const;
ATTACH_VIRTUAL_AST_OPERATIONS(Statement)
};
inline Statement::~Statement() { }
////////////////////////
// Blocks of statements.
////////////////////////
class Block final : public Statement, public Vectorized<Statement_Obj> {
ADD_PROPERTY(bool, is_root)
// needed for properly formatted CSS emission
protected:
void adjust_after_pushing(Statement_Obj s) override {}
public:
Block(ParserState pstate, size_t s = 0, bool r = false);
bool has_content() override;
ATTACH_AST_OPERATIONS(Block)
ATTACH_CRTP_PERFORM_METHODS()
};
////////////////////////////////////////////////////////////////////////
// Abstract base class for statements that contain blocks of statements.
////////////////////////////////////////////////////////////////////////
class Has_Block : public Statement {
ADD_PROPERTY(Block_Obj, block)
public:
Has_Block(ParserState pstate, Block_Obj b);
Has_Block(const Has_Block* ptr); // copy constructor
virtual ~Has_Block() = 0; // virtual destructor
virtual bool has_content() override;
};
inline Has_Block::~Has_Block() { }
/////////////////////////////////////////////////////////////////////////////
// Rulesets (i.e., sets of styles headed by a selector and containing a block
// of style declarations.
/////////////////////////////////////////////////////////////////////////////
class Ruleset final : public Has_Block {
ADD_PROPERTY(Selector_List_Obj, selector)
ADD_PROPERTY(bool, is_root);
public:
Ruleset(ParserState pstate, Selector_List_Obj s = {}, Block_Obj b = {});
bool is_invisible() const override;
ATTACH_AST_OPERATIONS(Ruleset)
ATTACH_CRTP_PERFORM_METHODS()
};
/////////////////
// Bubble.
/////////////////
class Bubble final : public Statement {
ADD_PROPERTY(Statement_Obj, node)
ADD_PROPERTY(bool, group_end)
public:
Bubble(ParserState pstate, Statement_Obj n, Statement_Obj g = {}, size_t t = 0);
bool bubbles() override;
ATTACH_AST_OPERATIONS(Bubble)
ATTACH_CRTP_PERFORM_METHODS()
};
/////////////////
// Trace.
/////////////////
class Trace final : public Has_Block {
ADD_CONSTREF(char, type)
ADD_CONSTREF(std::string, name)
public:
Trace(ParserState pstate, std::string n, Block_Obj b = {}, char type = 'm');
ATTACH_AST_OPERATIONS(Trace)
ATTACH_CRTP_PERFORM_METHODS()
};
/////////////////
// Media queries.
/////////////////
class Media_Block final : public Has_Block {
ADD_PROPERTY(List_Obj, media_queries)
public:
Media_Block(ParserState pstate, List_Obj mqs, Block_Obj b);
bool bubbles() override;
bool is_invisible() const override;
ATTACH_AST_OPERATIONS(Media_Block)
ATTACH_CRTP_PERFORM_METHODS()
};
///////////////////////////////////////////////////////////////////////
// At-rules -- arbitrary directives beginning with "@" that may have an
// optional statement block.
///////////////////////////////////////////////////////////////////////
class Directive final : public Has_Block {
ADD_CONSTREF(std::string, keyword)
ADD_PROPERTY(Selector_List_Obj, selector)
ADD_PROPERTY(Expression_Obj, value)
public:
Directive(ParserState pstate, std::string kwd, Selector_List_Obj sel = {}, Block_Obj b = {}, Expression_Obj val = {});
bool bubbles() override;
bool is_media();
bool is_keyframes();
ATTACH_AST_OPERATIONS(Directive)
ATTACH_CRTP_PERFORM_METHODS()
};
///////////////////////////////////////////////////////////////////////
// Keyframe-rules -- the child blocks of "@keyframes" nodes.
///////////////////////////////////////////////////////////////////////
class Keyframe_Rule final : public Has_Block {
// according to css spec, this should be <keyframes-name>
// <keyframes-name> = <custom-ident> | <string>
ADD_PROPERTY(Selector_List_Obj, name)
public:
Keyframe_Rule(ParserState pstate, Block_Obj b);
ATTACH_AST_OPERATIONS(Keyframe_Rule)
ATTACH_CRTP_PERFORM_METHODS()
};
////////////////////////////////////////////////////////////////////////
// Declarations -- style rules consisting of a property name and values.
////////////////////////////////////////////////////////////////////////
class Declaration final : public Has_Block {
ADD_PROPERTY(String_Obj, property)
ADD_PROPERTY(Expression_Obj, value)
ADD_PROPERTY(bool, is_important)
ADD_PROPERTY(bool, is_custom_property)
ADD_PROPERTY(bool, is_indented)
public:
Declaration(ParserState pstate, String_Obj prop, Expression_Obj val, bool i = false, bool c = false, Block_Obj b = {});
bool is_invisible() const override;
ATTACH_AST_OPERATIONS(Declaration)
ATTACH_CRTP_PERFORM_METHODS()
};
/////////////////////////////////////
// Assignments -- variable and value.
/////////////////////////////////////
class Assignment final : public Statement {
ADD_CONSTREF(std::string, variable)
ADD_PROPERTY(Expression_Obj, value)
ADD_PROPERTY(bool, is_default)
ADD_PROPERTY(bool, is_global)
public:
Assignment(ParserState pstate, std::string var, Expression_Obj val, bool is_default = false, bool is_global = false);
ATTACH_AST_OPERATIONS(Assignment)
ATTACH_CRTP_PERFORM_METHODS()
};
////////////////////////////////////////////////////////////////////////////
// Import directives. CSS and Sass import lists can be intermingled, so it's
// necessary to store a list of each in an Import node.
////////////////////////////////////////////////////////////////////////////
class Import final : public Statement {
std::vector<Expression_Obj> urls_;
std::vector<Include> incs_;
ADD_PROPERTY(List_Obj, import_queries);
public:
Import(ParserState pstate);
std::vector<Include>& incs();
std::vector<Expression_Obj>& urls();
ATTACH_AST_OPERATIONS(Import)
ATTACH_CRTP_PERFORM_METHODS()
};
// not yet resolved single import
// so far we only know requested name
class Import_Stub final : public Statement {
Include resource_;
public:
Import_Stub(ParserState pstate, Include res);
Include resource();
std::string imp_path();
std::string abs_path();
ATTACH_AST_OPERATIONS(Import_Stub)
ATTACH_CRTP_PERFORM_METHODS()
};
//////////////////////////////
// The Sass `@warn` directive.
//////////////////////////////
class Warning final : public Statement {
ADD_PROPERTY(Expression_Obj, message)
public:
Warning(ParserState pstate, Expression_Obj msg);
ATTACH_AST_OPERATIONS(Warning)
ATTACH_CRTP_PERFORM_METHODS()
};
///////////////////////////////
// The Sass `@error` directive.
///////////////////////////////
class Error final : public Statement {
ADD_PROPERTY(Expression_Obj, message)
public:
Error(ParserState pstate, Expression_Obj msg);
ATTACH_AST_OPERATIONS(Error)
ATTACH_CRTP_PERFORM_METHODS()
};
///////////////////////////////
// The Sass `@debug` directive.
///////////////////////////////
class Debug final : public Statement {
ADD_PROPERTY(Expression_Obj, value)
public:
Debug(ParserState pstate, Expression_Obj val);
ATTACH_AST_OPERATIONS(Debug)
ATTACH_CRTP_PERFORM_METHODS()
};
///////////////////////////////////////////
// CSS comments. These may be interpolated.
///////////////////////////////////////////
class Comment final : public Statement {
ADD_PROPERTY(String_Obj, text)
ADD_PROPERTY(bool, is_important)
public:
Comment(ParserState pstate, String_Obj txt, bool is_important);
virtual bool is_invisible() const override;
ATTACH_AST_OPERATIONS(Comment)
ATTACH_CRTP_PERFORM_METHODS()
};
////////////////////////////////////
// The Sass `@if` control directive.
////////////////////////////////////
class If final : public Has_Block {
ADD_PROPERTY(Expression_Obj, predicate)
ADD_PROPERTY(Block_Obj, alternative)
public:
If(ParserState pstate, Expression_Obj pred, Block_Obj con, Block_Obj alt = {});
virtual bool has_content() override;
ATTACH_AST_OPERATIONS(If)
ATTACH_CRTP_PERFORM_METHODS()
};
/////////////////////////////////////
// The Sass `@for` control directive.
/////////////////////////////////////
class For final : public Has_Block {
ADD_CONSTREF(std::string, variable)
ADD_PROPERTY(Expression_Obj, lower_bound)
ADD_PROPERTY(Expression_Obj, upper_bound)
ADD_PROPERTY(bool, is_inclusive)
public:
For(ParserState pstate, std::string var, Expression_Obj lo, Expression_Obj hi, Block_Obj b, bool inc);
ATTACH_AST_OPERATIONS(For)
ATTACH_CRTP_PERFORM_METHODS()
};
//////////////////////////////////////
// The Sass `@each` control directive.
//////////////////////////////////////
class Each final : public Has_Block {
ADD_PROPERTY(std::vector<std::string>, variables)
ADD_PROPERTY(Expression_Obj, list)
public:
Each(ParserState pstate, std::vector<std::string> vars, Expression_Obj lst, Block_Obj b);
ATTACH_AST_OPERATIONS(Each)
ATTACH_CRTP_PERFORM_METHODS()
};
///////////////////////////////////////
// The Sass `@while` control directive.
///////////////////////////////////////
class While final : public Has_Block {
ADD_PROPERTY(Expression_Obj, predicate)
public:
While(ParserState pstate, Expression_Obj pred, Block_Obj b);
ATTACH_AST_OPERATIONS(While)
ATTACH_CRTP_PERFORM_METHODS()
};
/////////////////////////////////////////////////////////////
// The @return directive for use inside SassScript functions.
/////////////////////////////////////////////////////////////
class Return final : public Statement {
ADD_PROPERTY(Expression_Obj, value)
public:
Return(ParserState pstate, Expression_Obj val);
ATTACH_AST_OPERATIONS(Return)
ATTACH_CRTP_PERFORM_METHODS()
};
////////////////////////////////
// The Sass `@extend` directive.
////////////////////////////////
class Extension final : public Statement {
ADD_PROPERTY(Selector_List_Obj, selector)
public:
Extension(ParserState pstate, Selector_List_Obj s);
ATTACH_AST_OPERATIONS(Extension)
ATTACH_CRTP_PERFORM_METHODS()
};
/////////////////////////////////////////////////////////////////////////////
// Definitions for both mixins and functions. The two cases are distinguished
// by a type tag.
/////////////////////////////////////////////////////////////////////////////
class Definition final : public Has_Block {
public:
enum Type { MIXIN, FUNCTION };
ADD_CONSTREF(std::string, name)
ADD_PROPERTY(Parameters_Obj, parameters)
ADD_PROPERTY(Env*, environment)
ADD_PROPERTY(Type, type)
ADD_PROPERTY(Native_Function, native_function)
ADD_PROPERTY(Sass_Function_Entry, c_function)
ADD_PROPERTY(void*, cookie)
ADD_PROPERTY(bool, is_overload_stub)
ADD_PROPERTY(Signature, signature)
public:
Definition(ParserState pstate,
std::string n,
Parameters_Obj params,
Block_Obj b,
Type t);
Definition(ParserState pstate,
Signature sig,
std::string n,
Parameters_Obj params,
Native_Function func_ptr,
bool overload_stub = false);
Definition(ParserState pstate,
Signature sig,
std::string n,
Parameters_Obj params,
Sass_Function_Entry c_func);
ATTACH_AST_OPERATIONS(Definition)
ATTACH_CRTP_PERFORM_METHODS()
};
//////////////////////////////////////
// Mixin calls (i.e., `@include ...`).
//////////////////////////////////////
class Mixin_Call final : public Has_Block {
ADD_CONSTREF(std::string, name)
ADD_PROPERTY(Arguments_Obj, arguments)
ADD_PROPERTY(Parameters_Obj, block_parameters)
public:
Mixin_Call(ParserState pstate, std::string n, Arguments_Obj args, Parameters_Obj b_params = {}, Block_Obj b = {});
ATTACH_AST_OPERATIONS(Mixin_Call)
ATTACH_CRTP_PERFORM_METHODS()
};
///////////////////////////////////////////////////
// The @content directive for mixin content blocks.
///////////////////////////////////////////////////
class Content final : public Statement {
ADD_PROPERTY(Arguments_Obj, arguments)
public:
Content(ParserState pstate, Arguments_Obj args);
ATTACH_AST_OPERATIONS(Content)
ATTACH_CRTP_PERFORM_METHODS()
};
////////////////////////////////////////////////////////////////////////////
// Arithmetic negation (logical negation is just an ordinary function call).
////////////////////////////////////////////////////////////////////////////
class Unary_Expression final : public Expression {
public:
enum Type { PLUS, MINUS, NOT, SLASH };
private:
HASH_PROPERTY(Type, optype)
HASH_PROPERTY(Expression_Obj, operand)
mutable size_t hash_;
public:
Unary_Expression(ParserState pstate, Type t, Expression_Obj o);
const std::string type_name();
virtual bool operator==(const Expression& rhs) const override;
size_t hash() const override;
ATTACH_AST_OPERATIONS(Unary_Expression)
ATTACH_CRTP_PERFORM_METHODS()
};
////////////////////////////////////////////////////////////
// Individual argument objects for mixin and function calls.
////////////////////////////////////////////////////////////
class Argument final : public Expression {
HASH_PROPERTY(Expression_Obj, value)
HASH_CONSTREF(std::string, name)
ADD_PROPERTY(bool, is_rest_argument)
ADD_PROPERTY(bool, is_keyword_argument)
mutable size_t hash_;
public:
Argument(ParserState pstate, Expression_Obj val, std::string n = "", bool rest = false, bool keyword = false);
void set_delayed(bool delayed) override;
bool operator==(const Expression& rhs) const override;
size_t hash() const override;
ATTACH_AST_OPERATIONS(Argument)
ATTACH_CRTP_PERFORM_METHODS()
};
////////////////////////////////////////////////////////////////////////
// Argument lists -- in their own class to facilitate context-sensitive
// error checking (e.g., ensuring that all ordinal arguments precede all
// named arguments).
////////////////////////////////////////////////////////////////////////
class Arguments final : public Expression, public Vectorized<Argument_Obj> {
ADD_PROPERTY(bool, has_named_arguments)
ADD_PROPERTY(bool, has_rest_argument)
ADD_PROPERTY(bool, has_keyword_argument)
protected:
void adjust_after_pushing(Argument_Obj a) override;
public:
Arguments(ParserState pstate);
void set_delayed(bool delayed) override;
Argument_Obj get_rest_argument();
Argument_Obj get_keyword_argument();
ATTACH_AST_OPERATIONS(Arguments)
ATTACH_CRTP_PERFORM_METHODS()
};
/////////////////
// Media queries.
/////////////////
class Media_Query final : public Expression,
public Vectorized<Media_Query_Expression_Obj> {
ADD_PROPERTY(String_Obj, media_type)
ADD_PROPERTY(bool, is_negated)
ADD_PROPERTY(bool, is_restricted)
public:
Media_Query(ParserState pstate, String_Obj t = {}, size_t s = 0, bool n = false, bool r = false);
ATTACH_AST_OPERATIONS(Media_Query)
ATTACH_CRTP_PERFORM_METHODS()
};
////////////////////////////////////////////////////
// Media expressions (for use inside media queries).
////////////////////////////////////////////////////
class Media_Query_Expression final : public Expression {
ADD_PROPERTY(Expression_Obj, feature)
ADD_PROPERTY(Expression_Obj, value)
ADD_PROPERTY(bool, is_interpolated)
public:
Media_Query_Expression(ParserState pstate, Expression_Obj f, Expression_Obj v, bool i = false);
ATTACH_AST_OPERATIONS(Media_Query_Expression)
ATTACH_CRTP_PERFORM_METHODS()
};
/////////////////////////////////////////////////
// At root expressions (for use inside @at-root).
/////////////////////////////////////////////////
class At_Root_Query final : public Expression {
private:
ADD_PROPERTY(Expression_Obj, feature)
ADD_PROPERTY(Expression_Obj, value)
public:
At_Root_Query(ParserState pstate, Expression_Obj f = {}, Expression_Obj v = {}, bool i = false);
bool exclude(std::string str);
ATTACH_AST_OPERATIONS(At_Root_Query)
ATTACH_CRTP_PERFORM_METHODS()
};
///////////
// At-root.
///////////
class At_Root_Block final : public Has_Block {
ADD_PROPERTY(At_Root_Query_Obj, expression)
public:
At_Root_Block(ParserState pstate, Block_Obj b = {}, At_Root_Query_Obj e = {});
bool bubbles() override;
bool exclude_node(Statement_Obj s);
ATTACH_AST_OPERATIONS(At_Root_Block)
ATTACH_CRTP_PERFORM_METHODS()
};
/////////////////////////////////////////////////////////
// Individual parameter objects for mixins and functions.
/////////////////////////////////////////////////////////
class Parameter final : public AST_Node {
ADD_CONSTREF(std::string, name)
ADD_PROPERTY(Expression_Obj, default_value)
ADD_PROPERTY(bool, is_rest_parameter)
public:
Parameter(ParserState pstate, std::string n, Expression_Obj def = {}, bool rest = false);
ATTACH_AST_OPERATIONS(Parameter)
ATTACH_CRTP_PERFORM_METHODS()
};
/////////////////////////////////////////////////////////////////////////
// Parameter lists -- in their own class to facilitate context-sensitive
// error checking (e.g., ensuring that all optional parameters follow all
// required parameters).
/////////////////////////////////////////////////////////////////////////
class Parameters final : public AST_Node, public Vectorized<Parameter_Obj> {
ADD_PROPERTY(bool, has_optional_parameters)
ADD_PROPERTY(bool, has_rest_parameter)
protected:
void adjust_after_pushing(Parameter_Obj p) override;
public:
Parameters(ParserState pstate);
ATTACH_AST_OPERATIONS(Parameters)
ATTACH_CRTP_PERFORM_METHODS()
};
}
#include "ast_values.hpp"
#include "ast_supports.hpp"
#include "ast_selectors.hpp"
#ifdef __clang__
// #pragma clang diagnostic pop
// #pragma clang diagnostic push
#endif
#endif
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