hlibsass-0.1.5.0: libsass/src/eval.cpp
#include <cstdlib>
#include <cmath>
#include <iostream>
#include <sstream>
#include <iomanip>
#include <typeinfo>
#include "file.hpp"
#include "eval.hpp"
#include "ast.hpp"
#include "bind.hpp"
#include "util.hpp"
#include "to_string.hpp"
#include "inspect.hpp"
#include "environment.hpp"
#include "position.hpp"
#include "sass/values.h"
#include "to_value.hpp"
#include "to_c.hpp"
#include "context.hpp"
#include "backtrace.hpp"
#include "lexer.hpp"
#include "prelexer.hpp"
#include "parser.hpp"
#include "expand.hpp"
#include "color_maps.hpp"
namespace Sass {
inline double add(double x, double y) { return x + y; }
inline double sub(double x, double y) { return x - y; }
inline double mul(double x, double y) { return x * y; }
inline double div(double x, double y) { return x / y; } // x/0 checked by caller
inline double mod(double x, double y) { return std::abs(std::fmod(x, y)); } // x/0 checked by caller
typedef double (*bop)(double, double);
bop ops[Sass_OP::NUM_OPS] = {
0, 0, // and, or
0, 0, 0, 0, 0, 0, // eq, neq, gt, gte, lt, lte
add, sub, mul, div, mod
};
Eval::Eval(Expand& exp)
: exp(exp),
ctx(exp.ctx),
listize(exp.ctx)
{ }
Eval::~Eval() { }
Context& Eval::context()
{
return ctx;
}
Env* Eval::environment()
{
return exp.environment();
}
Selector_List* Eval::selector()
{
return exp.selector();
}
Backtrace* Eval::backtrace()
{
return exp.backtrace();
}
Expression* Eval::operator()(Block* b)
{
Expression* val = 0;
for (size_t i = 0, L = b->length(); i < L; ++i) {
val = (*b)[i]->perform(this);
if (val) return val;
}
return val;
}
Expression* Eval::operator()(Assignment* a)
{
Env* env = exp.environment();
std::string var(a->variable());
if (a->is_global()) {
if (a->is_default()) {
if (env->has_global(var)) {
Expression* e = dynamic_cast<Expression*>(env->get_global(var));
if (!e || e->concrete_type() == Expression::NULL_VAL) {
env->set_global(var, a->value()->perform(this));
}
}
else {
env->set_global(var, a->value()->perform(this));
}
}
else {
env->set_global(var, a->value()->perform(this));
}
}
else if (a->is_default()) {
if (env->has_lexical(var)) {
auto cur = env;
while (cur && cur->is_lexical()) {
if (cur->has_local(var)) {
if (AST_Node* node = cur->get_local(var)) {
Expression* e = dynamic_cast<Expression*>(node);
if (!e || e->concrete_type() == Expression::NULL_VAL) {
cur->set_local(var, a->value()->perform(this));
}
}
else {
throw std::runtime_error("Env not in sync");
}
return 0;
}
cur = cur->parent();
}
throw std::runtime_error("Env not in sync");
}
else if (env->has_global(var)) {
if (AST_Node* node = env->get_global(var)) {
Expression* e = dynamic_cast<Expression*>(node);
if (!e || e->concrete_type() == Expression::NULL_VAL) {
env->set_global(var, a->value()->perform(this));
}
}
}
else if (env->is_lexical()) {
env->set_local(var, a->value()->perform(this));
}
else {
env->set_local(var, a->value()->perform(this));
}
}
else {
env->set_lexical(var, a->value()->perform(this));
}
return 0;
}
Expression* Eval::operator()(If* i)
{
Expression* rv = 0;
Env env(exp.environment());
exp.env_stack.push_back(&env);
if (*i->predicate()->perform(this)) {
rv = i->block()->perform(this);
}
else {
Block* alt = i->alternative();
if (alt) rv = alt->perform(this);
}
exp.env_stack.pop_back();
return rv;
}
// For does not create a new env scope
// But iteration vars are reset afterwards
Expression* Eval::operator()(For* f)
{
std::string variable(f->variable());
Expression* low = f->lower_bound()->perform(this);
if (low->concrete_type() != Expression::NUMBER) {
error("lower bound of `@for` directive must be numeric", low->pstate());
}
Expression* high = f->upper_bound()->perform(this);
if (high->concrete_type() != Expression::NUMBER) {
error("upper bound of `@for` directive must be numeric", high->pstate());
}
Number* sass_start = static_cast<Number*>(low);
Number* sass_end = static_cast<Number*>(high);
// check if units are valid for sequence
if (sass_start->unit() != sass_end->unit()) {
std::stringstream msg; msg << "Incompatible units: '"
<< sass_start->unit() << "' and '"
<< sass_end->unit() << "'.";
error(msg.str(), low->pstate(), backtrace());
}
double start = sass_start->value();
double end = sass_end->value();
// only create iterator once in this environment
Env* env = exp.environment();
Number* it = SASS_MEMORY_NEW(env->mem, Number, low->pstate(), start, sass_end->unit());
AST_Node* old_var = env->has_local(variable) ? env->get_local(variable) : 0;
env->set_local(variable, it);
Block* body = f->block();
Expression* val = 0;
if (start < end) {
if (f->is_inclusive()) ++end;
for (double i = start;
i < end;
++i) {
it->value(i);
env->set_local(variable, it);
val = body->perform(this);
if (val) break;
}
} else {
if (f->is_inclusive()) --end;
for (double i = start;
i > end;
--i) {
it->value(i);
env->set_local(variable, it);
val = body->perform(this);
if (val) break;
}
}
// restore original environment
if (!old_var) env->del_local(variable);
else env->set_local(variable, old_var);
return val;
}
// Eval does not create a new env scope
// But iteration vars are reset afterwards
Expression* Eval::operator()(Each* e)
{
std::vector<std::string> variables(e->variables());
Expression* expr = e->list()->perform(this);
Env* env = exp.environment();
List* list = 0;
Map* map = 0;
if (expr->concrete_type() == Expression::MAP) {
map = static_cast<Map*>(expr);
}
else if (expr->concrete_type() != Expression::LIST) {
list = SASS_MEMORY_NEW(ctx.mem, List, expr->pstate(), 1, SASS_COMMA);
*list << expr;
}
else {
list = static_cast<List*>(expr);
}
// remember variables and then reset them
std::vector<AST_Node*> old_vars(variables.size());
for (size_t i = 0, L = variables.size(); i < L; ++i) {
old_vars[i] = env->has_local(variables[i]) ? env->get_local(variables[i]) : 0;
env->set_local(variables[i], 0);
}
Block* body = e->block();
Expression* val = 0;
if (map) {
for (auto key : map->keys()) {
Expression* value = map->at(key);
if (variables.size() == 1) {
List* variable = SASS_MEMORY_NEW(ctx.mem, List, map->pstate(), 2, SASS_SPACE);
*variable << key;
*variable << value;
env->set_local(variables[0], variable);
} else {
env->set_local(variables[0], key);
env->set_local(variables[1], value);
}
val = body->perform(this);
if (val) break;
}
}
else {
for (size_t i = 0, L = list->length(); i < L; ++i) {
Expression* e = (*list)[i];
// unwrap value if the expression is an argument
if (Argument* arg = dynamic_cast<Argument*>(e)) e = arg->value();
// check if we got passed a list of args (investigate)
if (List* scalars = dynamic_cast<List*>(e)) {
if (variables.size() == 1) {
Expression* var = scalars;
env->set_local(variables[0], var);
} else {
for (size_t j = 0, K = variables.size(); j < K; ++j) {
Expression* res = j >= scalars->length()
? SASS_MEMORY_NEW(ctx.mem, Null, expr->pstate())
: (*scalars)[j];
env->set_local(variables[j], res);
}
}
} else {
if (variables.size() > 0) {
env->set_local(variables[0], e);
for (size_t j = 1, K = variables.size(); j < K; ++j) {
Expression* res = SASS_MEMORY_NEW(ctx.mem, Null, expr->pstate());
env->set_local(variables[j], res);
}
}
}
val = body->perform(this);
if (val) break;
}
}
// restore original environment
for (size_t j = 0, K = variables.size(); j < K; ++j) {
if(!old_vars[j]) env->del_local(variables[j]);
else env->set_local(variables[j], old_vars[j]);
}
return val;
}
Expression* Eval::operator()(While* w)
{
Expression* pred = w->predicate();
Block* body = w->block();
while (*pred->perform(this)) {
Expression* val = body->perform(this);
if (val) return val;
}
return 0;
}
Expression* Eval::operator()(Return* r)
{
return r->value()->perform(this);
}
Expression* Eval::operator()(Warning* w)
{
Expression* message = w->message()->perform(this);
To_String to_string(&ctx);
Env* env = exp.environment();
// try to use generic function
if (env->has("@warn[f]")) {
Definition* def = static_cast<Definition*>((*env)["@warn[f]"]);
// Block* body = def->block();
// Native_Function func = def->native_function();
Sass_Function_Entry c_function = def->c_function();
Sass_Function_Fn c_func = sass_function_get_function(c_function);
To_C to_c;
union Sass_Value* c_args = sass_make_list(1, SASS_COMMA);
sass_list_set_value(c_args, 0, message->perform(&to_c));
union Sass_Value* c_val = c_func(c_args, c_function, ctx.c_compiler);
sass_delete_value(c_args);
sass_delete_value(c_val);
return 0;
}
std::string result(unquote(message->perform(&to_string)));
Backtrace top(backtrace(), w->pstate(), "");
std::cerr << "WARNING: " << result;
std::cerr << top.to_string(true);
std::cerr << std::endl << std::endl;
return 0;
}
Expression* Eval::operator()(Error* e)
{
Expression* message = e->message()->perform(this);
To_String to_string(&ctx);
Env* env = exp.environment();
// try to use generic function
if (env->has("@error[f]")) {
Definition* def = static_cast<Definition*>((*env)["@error[f]"]);
// Block* body = def->block();
// Native_Function func = def->native_function();
Sass_Function_Entry c_function = def->c_function();
Sass_Function_Fn c_func = sass_function_get_function(c_function);
To_C to_c;
union Sass_Value* c_args = sass_make_list(1, SASS_COMMA);
sass_list_set_value(c_args, 0, message->perform(&to_c));
union Sass_Value* c_val = c_func(c_args, c_function, ctx.c_compiler);
sass_delete_value(c_args);
sass_delete_value(c_val);
return 0;
}
std::string result(unquote(message->perform(&to_string)));
error(result, e->pstate());
return 0;
}
Expression* Eval::operator()(Debug* d)
{
Expression* message = d->value()->perform(this);
To_String to_string(&ctx, false, true);
Env* env = exp.environment();
// try to use generic function
if (env->has("@debug[f]")) {
Definition* def = static_cast<Definition*>((*env)["@debug[f]"]);
// Block* body = def->block();
// Native_Function func = def->native_function();
Sass_Function_Entry c_function = def->c_function();
Sass_Function_Fn c_func = sass_function_get_function(c_function);
To_C to_c;
union Sass_Value* c_args = sass_make_list(1, SASS_COMMA);
sass_list_set_value(c_args, 0, message->perform(&to_c));
union Sass_Value* c_val = c_func(c_args, c_function, ctx.c_compiler);
sass_delete_value(c_args);
sass_delete_value(c_val);
return 0;
}
std::string cwd(ctx.cwd());
std::string result(unquote(message->perform(&to_string)));
std::string abs_path(Sass::File::rel2abs(d->pstate().path, cwd, cwd));
std::string rel_path(Sass::File::abs2rel(d->pstate().path, cwd, cwd));
std::string output_path(Sass::File::path_for_console(rel_path, abs_path, d->pstate().path));
std::cerr << output_path << ":" << d->pstate().line+1 << " DEBUG: " << result;
std::cerr << std::endl;
return 0;
}
Expression* Eval::operator()(List* l)
{
if (l->is_expanded()) return l;
List* ll = SASS_MEMORY_NEW(ctx.mem, List,
l->pstate(),
l->length(),
l->separator(),
l->is_arglist());
for (size_t i = 0, L = l->length(); i < L; ++i) {
*ll << (*l)[i]->perform(this);
}
ll->is_expanded(true);
return ll;
}
Expression* Eval::operator()(Map* m)
{
if (m->is_expanded()) return m;
// make sure we're not starting with duplicate keys.
// the duplicate key state will have been set in the parser phase.
if (m->has_duplicate_key()) {
To_String to_string(&ctx);
error("Duplicate key \"" + m->get_duplicate_key()->perform(&to_string) + "\" in map " + m->perform(&to_string) + ".", m->pstate());
}
Map* mm = SASS_MEMORY_NEW(ctx.mem, Map,
m->pstate(),
m->length());
for (auto key : m->keys()) {
Expression* ex_key = key->perform(this);
Expression* ex_val = m->at(key)->perform(this);
*mm << std::make_pair(ex_key, ex_val);
}
// check the evaluated keys aren't duplicates.
if (mm->has_duplicate_key()) {
To_String to_string(&ctx);
error("Duplicate key \"" + mm->get_duplicate_key()->perform(&to_string) + "\" in map " + m->perform(&to_string) + ".", mm->pstate());
}
mm->is_expanded(true);
return mm;
}
Expression* Eval::operator()(Binary_Expression* b)
{
enum Sass_OP op_type = b->type();
// don't eval delayed expressions (the '/' when used as a separator)
if (op_type == Sass_OP::DIV && b->is_delayed()) return b;
b->is_delayed(false);
// if one of the operands is a '/' then make sure it's evaluated
Expression* lhs = b->left()->perform(this);
lhs->is_delayed(false);
while (typeid(*lhs) == typeid(Binary_Expression)) {
Binary_Expression* lhs_ex = static_cast<Binary_Expression*>(lhs);
if (lhs_ex->type() == Sass_OP::DIV && lhs_ex->is_delayed()) break;
lhs = Eval::operator()(lhs_ex);
}
switch (op_type) {
case Sass_OP::AND:
return *lhs ? b->right()->perform(this) : lhs;
break;
case Sass_OP::OR:
return *lhs ? lhs : b->right()->perform(this);
break;
default:
break;
}
// not a logical connective, so go ahead and eval the rhs
Expression* rhs = b->right()->perform(this);
// maybe fully evaluate structure
if (op_type == Sass_OP::EQ ||
op_type == Sass_OP::NEQ ||
op_type == Sass_OP::GT ||
op_type == Sass_OP::GTE ||
op_type == Sass_OP::LT ||
op_type == Sass_OP::LTE)
{
rhs->is_expanded(false);
rhs->set_delayed(false);
rhs = rhs->perform(this);
}
else
{
// rhs->set_delayed(false);
// rhs = rhs->perform(this);
}
// upgrade string to number if possible (issue #948)
if (op_type == Sass_OP::DIV || op_type == Sass_OP::MUL) {
if (String_Constant* str = dynamic_cast<String_Constant*>(rhs)) {
std::string value(str->value());
const char* start = value.c_str();
if (Prelexer::sequence < Prelexer::number >(start) != 0) {
rhs = SASS_MEMORY_NEW(ctx.mem, Textual, rhs->pstate(), Textual::DIMENSION, str->value());
rhs->is_delayed(false); rhs = rhs->perform(this);
}
}
}
// see if it's a relational expression
switch(op_type) {
case Sass_OP::EQ: return SASS_MEMORY_NEW(ctx.mem, Boolean, b->pstate(), eq(lhs, rhs));
case Sass_OP::NEQ: return SASS_MEMORY_NEW(ctx.mem, Boolean, b->pstate(), !eq(lhs, rhs));
case Sass_OP::GT: return SASS_MEMORY_NEW(ctx.mem, Boolean, b->pstate(), !lt(lhs, rhs) && !eq(lhs, rhs));
case Sass_OP::GTE: return SASS_MEMORY_NEW(ctx.mem, Boolean, b->pstate(), !lt(lhs, rhs));
case Sass_OP::LT: return SASS_MEMORY_NEW(ctx.mem, Boolean, b->pstate(), lt(lhs, rhs));
case Sass_OP::LTE: return SASS_MEMORY_NEW(ctx.mem, Boolean, b->pstate(), lt(lhs, rhs) || eq(lhs, rhs));
default: break;
}
Expression::Concrete_Type l_type = lhs->concrete_type();
Expression::Concrete_Type r_type = rhs->concrete_type();
// Is one of the operands an interpolant?
String_Schema* s1 = dynamic_cast<String_Schema*>(b->left());
String_Schema* s2 = dynamic_cast<String_Schema*>(b->right());
if ((s1 && s1->has_interpolants()) || (s2 && s2->has_interpolants())) {
std::string sep;
switch (op_type) {
case Sass_OP::SUB: sep = "-"; break;
case Sass_OP::DIV: sep = "/"; break;
case Sass_OP::ADD: sep = "+"; break;
case Sass_OP::MUL: sep = "*"; break;
default: break;
}
// If possible upgrade LHS to a number
if (op_type == Sass_OP::DIV || op_type == Sass_OP::MUL || op_type == Sass_OP::ADD || op_type == Sass_OP::SUB) {
if (String_Constant* str = dynamic_cast<String_Constant*>(lhs)) {
std::string value(str->value());
const char* start = value.c_str();
if (Prelexer::sequence < Prelexer::number >(start) != 0) {
lhs = SASS_MEMORY_NEW(ctx.mem, Textual, lhs->pstate(), Textual::DIMENSION, str->value());
lhs->is_delayed(false); lhs = lhs->perform(this);
}
}
if (String_Constant* str = dynamic_cast<String_Constant*>(rhs)) {
std::string value(str->value());
const char* start = value.c_str();
if (Prelexer::sequence < Prelexer::number >(start) != 0) {
rhs = SASS_MEMORY_NEW(ctx.mem, Textual, rhs->pstate(), Textual::DIMENSION, str->value());
rhs->is_delayed(false); rhs = rhs->perform(this);
}
}
}
To_Value to_value(ctx, ctx.mem);
Value* v_l = dynamic_cast<Value*>(lhs->perform(&to_value));
Value* v_r = dynamic_cast<Value*>(rhs->perform(&to_value));
Expression::Concrete_Type l_type = lhs->concrete_type();
Expression::Concrete_Type r_type = rhs->concrete_type();
if (l_type == Expression::NUMBER && r_type == Expression::NUMBER) {
return SASS_MEMORY_NEW(ctx.mem, String_Constant, lhs->pstate(),
v_l->to_string() + " " + sep + " " + v_r->to_string());
}
}
// ToDo: throw error in op functions
// ToDo: then catch and re-throw them
ParserState pstate(b->pstate());
int precision = (int)ctx.c_options->precision;
bool compressed = ctx.output_style() == SASS_STYLE_COMPRESSED;
if (l_type == Expression::NUMBER && r_type == Expression::NUMBER) {
const Number* l_n = dynamic_cast<const Number*>(lhs);
const Number* r_n = dynamic_cast<const Number*>(rhs);
return op_numbers(ctx.mem, op_type, *l_n, *r_n, compressed, precision, &pstate);
}
if (l_type == Expression::NUMBER && r_type == Expression::COLOR) {
const Number* l_n = dynamic_cast<const Number*>(lhs);
const Color* r_c = dynamic_cast<const Color*>(rhs);
return op_number_color(ctx.mem, op_type, *l_n, *r_c, compressed, precision, &pstate);
}
if (l_type == Expression::COLOR && r_type == Expression::NUMBER) {
const Color* l_c = dynamic_cast<const Color*>(lhs);
const Number* r_n = dynamic_cast<const Number*>(rhs);
return op_color_number(ctx.mem, op_type, *l_c, *r_n, compressed, precision, &pstate);
}
if (l_type == Expression::COLOR && r_type == Expression::COLOR) {
const Color* l_c = dynamic_cast<const Color*>(lhs);
const Color* r_c = dynamic_cast<const Color*>(rhs);
return op_colors(ctx.mem, op_type, *l_c, *r_c, compressed, precision, &pstate);
}
To_Value to_value(ctx, ctx.mem);
Value* v_l = dynamic_cast<Value*>(lhs->perform(&to_value));
Value* v_r = dynamic_cast<Value*>(rhs->perform(&to_value));
Value* ex = op_strings(ctx.mem, op_type, *v_l, *v_r, compressed, precision, &pstate);
if (String_Constant* str = dynamic_cast<String_Constant*>(ex))
{
if (str->concrete_type() != Expression::STRING) return ex;
String_Constant* lstr = dynamic_cast<String_Constant*>(lhs);
String_Constant* rstr = dynamic_cast<String_Constant*>(rhs);
if (String_Constant* org = lstr ? lstr : rstr)
{ str->quote_mark(org->quote_mark()); }
}
return ex;
}
Expression* Eval::operator()(Unary_Expression* u)
{
Expression* operand = u->operand()->perform(this);
if (u->type() == Unary_Expression::NOT) {
Boolean* result = SASS_MEMORY_NEW(ctx.mem, Boolean, u->pstate(), (bool)*operand);
result->value(!result->value());
return result;
}
else if (operand->concrete_type() == Expression::NUMBER) {
Number* result = SASS_MEMORY_NEW(ctx.mem, Number, *static_cast<Number*>(operand));
result->value(u->type() == Unary_Expression::MINUS
? -result->value()
: result->value());
return result;
}
else {
To_String to_string(&ctx);
// Special cases: +/- variables which evaluate to null ouput just +/-,
// but +/- null itself outputs the string
if (operand->concrete_type() == Expression::NULL_VAL && typeid(*(u->operand())) == typeid(Variable)) {
u->operand(SASS_MEMORY_NEW(ctx.mem, String_Quoted, u->pstate(), ""));
}
else u->operand(operand);
String_Constant* result = SASS_MEMORY_NEW(ctx.mem, String_Quoted,
u->pstate(),
u->perform(&to_string));
return result;
}
// unreachable
return u;
}
Expression* Eval::operator()(Function_Call* c)
{
if (backtrace()->parent != NULL && backtrace()->depth() > Constants::MaxCallStack) {
std::ostringstream stm;
stm << "Stack depth exceeded max of " << Constants::MaxCallStack;
error(stm.str(), c->pstate(), backtrace());
}
std::string name(Util::normalize_underscores(c->name()));
std::string full_name(name + "[f]");
Arguments* args = c->arguments();
if (full_name != "if[f]") {
args = static_cast<Arguments*>(args->perform(this));
}
Env* env = environment();
if (!env->has(full_name)) {
if (!env->has("*[f]")) {
// just pass it through as a literal
Function_Call* lit = SASS_MEMORY_NEW(ctx.mem, Function_Call,
c->pstate(),
c->name(),
args);
To_String to_string(&ctx);
if (args->has_named_arguments()) {
error("Function " + c->name() + " doesn't support keyword arguments", c->pstate());
}
return SASS_MEMORY_NEW(ctx.mem, String_Quoted,
c->pstate(),
lit->perform(&to_string));
} else {
// call generic function
full_name = "*[f]";
}
}
Definition* def = static_cast<Definition*>((*env)[full_name]);
if (def->is_overload_stub()) {
std::stringstream ss;
ss << full_name
<< args->length();
full_name = ss.str();
std::string resolved_name(full_name);
if (!env->has(resolved_name)) error("overloaded function `" + std::string(c->name()) + "` given wrong number of arguments", c->pstate());
def = static_cast<Definition*>((*env)[resolved_name]);
}
Expression* result = c;
Block* body = def->block();
Native_Function func = def->native_function();
Sass_Function_Entry c_function = def->c_function();
Parameters* params = def->parameters();
Env fn_env(def->environment());
exp.env_stack.push_back(&fn_env);
if (func || body) {
bind(std::string("Function"), c->name(), params, args, &ctx, &fn_env, this);
Backtrace here(backtrace(), c->pstate(), ", in function `" + c->name() + "`");
exp.backtrace_stack.push_back(&here);
// if it's user-defined, eval the body
if (body) result = body->perform(this);
// if it's native, invoke the underlying CPP function
else result = func(fn_env, *env, ctx, def->signature(), c->pstate(), backtrace());
if (!result) error(std::string("Function ") + c->name() + " did not return a value", c->pstate());
exp.backtrace_stack.pop_back();
}
// else if it's a user-defined c function
// convert call into C-API compatible form
else if (c_function) {
Sass_Function_Fn c_func = sass_function_get_function(c_function);
if (full_name == "*[f]") {
String_Quoted *str = SASS_MEMORY_NEW(ctx.mem, String_Quoted, c->pstate(), c->name());
Arguments* new_args = SASS_MEMORY_NEW(ctx.mem, Arguments, c->pstate());
*new_args << SASS_MEMORY_NEW(ctx.mem, Argument, c->pstate(), str);
*new_args += args;
args = new_args;
}
// populates env with default values for params
std::string ff(c->name());
bind(std::string("Function"), c->name(), params, args, &ctx, &fn_env, this);
Backtrace here(backtrace(), c->pstate(), ", in function `" + c->name() + "`");
exp.backtrace_stack.push_back(&here);
To_C to_c;
union Sass_Value* c_args = sass_make_list(params[0].length(), SASS_COMMA);
for(size_t i = 0; i < params[0].length(); i++) {
std::string key = params[0][i]->name();
AST_Node* node = fn_env.get_local(key);
Expression* arg = static_cast<Expression*>(node);
sass_list_set_value(c_args, i, arg->perform(&to_c));
}
union Sass_Value* c_val = c_func(c_args, c_function, ctx.c_compiler);
if (sass_value_get_tag(c_val) == SASS_ERROR) {
error("error in C function " + c->name() + ": " + sass_error_get_message(c_val), c->pstate(), backtrace());
} else if (sass_value_get_tag(c_val) == SASS_WARNING) {
error("warning in C function " + c->name() + ": " + sass_warning_get_message(c_val), c->pstate(), backtrace());
}
result = cval_to_astnode(ctx.mem, c_val, ctx, backtrace(), c->pstate());
exp.backtrace_stack.pop_back();
sass_delete_value(c_args);
if (c_val != c_args)
sass_delete_value(c_val);
}
// link back to function definition
// only do this for custom functions
if (result->pstate().file == std::string::npos)
result->pstate(c->pstate());
result->is_delayed(result->concrete_type() == Expression::STRING);
if (!result->is_delayed()) result = result->perform(this);
exp.env_stack.pop_back();
return result;
}
Expression* Eval::operator()(Function_Call_Schema* s)
{
Expression* evaluated_name = s->name()->perform(this);
Expression* evaluated_args = s->arguments()->perform(this);
String_Schema* ss = SASS_MEMORY_NEW(ctx.mem, String_Schema, s->pstate(), 2);
(*ss) << evaluated_name << evaluated_args;
return ss->perform(this);
}
Expression* Eval::operator()(Variable* v)
{
To_String to_string(&ctx);
std::string name(v->name());
Expression* value = 0;
Env* env = environment();
if (env->has(name)) value = static_cast<Expression*>((*env)[name]);
else error("Undefined variable: \"" + v->name() + "\".", v->pstate());
// std::cerr << "name: " << v->name() << "; type: " << typeid(*value).name() << "; value: " << value->perform(&to_string) << std::endl;
if (typeid(*value) == typeid(Argument)) value = static_cast<Argument*>(value)->value();
// behave according to as ruby sass (add leading zero)
if (value->concrete_type() == Expression::NUMBER) {
value = SASS_MEMORY_NEW(ctx.mem, Number, *static_cast<Number*>(value));
static_cast<Number*>(value)->zero(true);
}
else if (value->concrete_type() == Expression::STRING) {
if (auto str = dynamic_cast<String_Quoted*>(value)) {
value = SASS_MEMORY_NEW(ctx.mem, String_Quoted, *str);
} else if (auto str = dynamic_cast<String_Constant*>(value)) {
value = SASS_MEMORY_NEW(ctx.mem, String_Quoted, str->pstate(), str->perform(&to_string));
}
}
else if (value->concrete_type() == Expression::LIST) {
value = SASS_MEMORY_NEW(ctx.mem, List, *static_cast<List*>(value));
}
else if (value->concrete_type() == Expression::MAP) {
value = SASS_MEMORY_NEW(ctx.mem, Map, *static_cast<Map*>(value));
}
else if (value->concrete_type() == Expression::BOOLEAN) {
value = SASS_MEMORY_NEW(ctx.mem, Boolean, *static_cast<Boolean*>(value));
}
else if (value->concrete_type() == Expression::COLOR) {
value = SASS_MEMORY_NEW(ctx.mem, Color, *static_cast<Color*>(value));
}
else if (value->concrete_type() == Expression::NULL_VAL) {
value = SASS_MEMORY_NEW(ctx.mem, Null, value->pstate());
}
else if (value->concrete_type() == Expression::SELECTOR) {
value = value->perform(this); // ->perform(&listize);
}
// std::cerr << "\ttype is now: " << typeid(*value).name() << std::endl << std::endl;
return value;
}
Expression* Eval::operator()(Textual* t)
{
using Prelexer::number;
Expression* result = 0;
bool zero = !( t->value().substr(0, 1) == "." ||
t->value().substr(0, 2) == "-." );
const std::string& text = t->value();
size_t num_pos = text.find_first_not_of(" \n\r\t");
if (num_pos == std::string::npos) num_pos = text.length();
size_t unit_pos = text.find_first_not_of("-+0123456789.", num_pos);
if (unit_pos == std::string::npos) unit_pos = text.length();
const std::string& num = text.substr(num_pos, unit_pos - num_pos);
switch (t->type())
{
case Textual::NUMBER:
result = SASS_MEMORY_NEW(ctx.mem, Number,
t->pstate(),
sass_atof(num.c_str()),
"",
zero);
break;
case Textual::PERCENTAGE:
result = SASS_MEMORY_NEW(ctx.mem, Number,
t->pstate(),
sass_atof(num.c_str()),
"%",
zero);
break;
case Textual::DIMENSION:
result = SASS_MEMORY_NEW(ctx.mem, Number,
t->pstate(),
sass_atof(num.c_str()),
Token(number(text.c_str())),
zero);
break;
case Textual::HEX: {
if (t->value().substr(0, 1) != "#") {
result = SASS_MEMORY_NEW(ctx.mem, String_Quoted, t->pstate(), t->value());
break;
}
std::string hext(t->value().substr(1)); // chop off the '#'
if (hext.length() == 6) {
std::string r(hext.substr(0,2));
std::string g(hext.substr(2,2));
std::string b(hext.substr(4,2));
result = SASS_MEMORY_NEW(ctx.mem, Color,
t->pstate(),
static_cast<double>(strtol(r.c_str(), NULL, 16)),
static_cast<double>(strtol(g.c_str(), NULL, 16)),
static_cast<double>(strtol(b.c_str(), NULL, 16)),
1, true,
t->value());
}
else {
result = SASS_MEMORY_NEW(ctx.mem, Color,
t->pstate(),
static_cast<double>(strtol(std::string(2,hext[0]).c_str(), NULL, 16)),
static_cast<double>(strtol(std::string(2,hext[1]).c_str(), NULL, 16)),
static_cast<double>(strtol(std::string(2,hext[2]).c_str(), NULL, 16)),
1, false,
t->value());
}
} break;
}
return result;
}
Expression* Eval::operator()(Number* n)
{
return n;
}
Expression* Eval::operator()(Boolean* b)
{
return b;
}
char is_quoted(std::string str)
{
size_t len = str.length();
if (len < 2) return 0;
if ((str[0] == '"' && str[len-1] == '"') || (str[0] == '\'' && str[len-1] == '\'')) {
return str[0];
}
else {
return 0;
}
}
std::string Eval::interpolation(Expression* s, bool into_quotes) {
Env* env = environment();
if (String_Quoted* str_quoted = dynamic_cast<String_Quoted*>(s)) {
if (str_quoted->quote_mark()) {
if (str_quoted->quote_mark() == '*' || str_quoted->is_delayed()) {
return evacuate_escapes(str_quoted->value());
} else {
return string_escape(quote(str_quoted->value(), str_quoted->quote_mark()));
}
} else {
return evacuate_escapes(str_quoted->value());
}
} else if (String_Constant* str_constant = dynamic_cast<String_Constant*>(s)) {
if (into_quotes && !str_constant->is_interpolant()) return str_constant->value();
return evacuate_escapes(str_constant->value());
} else if (dynamic_cast<Parent_Selector*>(s)) {
To_String to_string(&ctx);
Expression* sel = s->perform(this);
return evacuate_quotes(sel ? sel->perform(&to_string) : "");
} else if (String_Schema* str_schema = dynamic_cast<String_Schema*>(s)) {
// To_String to_string(&ctx);
// return evacuate_quotes(str_schema->perform(&to_string));
std::string res = "";
for(auto i : str_schema->elements())
res += (interpolation(i));
//ToDo: do this in one step
auto esc = evacuate_escapes(res);
auto unq = unquote(esc);
if (unq == esc) {
return string_to_output(res);
} else {
return evacuate_quotes(unq);
}
} else if (List* list = dynamic_cast<List*>(s)) {
std::string acc = ""; // ToDo: different output styles
std::string sep = list->separator() == SASS_COMMA ? "," : " ";
if (ctx.output_style() != SASS_STYLE_COMPRESSED && sep == ",") sep += " ";
bool initial = false;
for(auto item : list->elements()) {
if (item->concrete_type() != Expression::NULL_VAL) {
if (initial) acc += sep;
acc += interpolation(item);
initial = true;
}
}
return evacuate_quotes(acc);
} else if (Variable* var = dynamic_cast<Variable*>(s)) {
std::string name(var->name());
if (!env->has(name)) error("Undefined variable: \"" + var->name() + "\".", var->pstate());
Expression* value = static_cast<Expression*>((*env)[name]);
return evacuate_quotes(interpolation(value));
} else if (dynamic_cast<Binary_Expression*>(s)) {
Expression* ex = s->perform(this);
// avoid recursive calls if same object gets returned
// since we will call interpolate again for the result
if (ex == s) {
To_String to_string(&ctx);
return evacuate_quotes(s->perform(&to_string));
}
return evacuate_quotes(interpolation(ex));
} else if (dynamic_cast<Function_Call*>(s)) {
Expression* ex = s->perform(this);
return evacuate_quotes(unquote(interpolation(ex)));
} else if (dynamic_cast<Unary_Expression*>(s)) {
Expression* ex = s->perform(this);
return evacuate_quotes(interpolation(ex));
} else if (dynamic_cast<Map*>(s)) {
To_String to_string(&ctx);
std::string dbg(s->perform(&to_string));
error(dbg + " isn't a valid CSS value.", s->pstate());
return dbg;
} else {
To_String to_string(&ctx);
return evacuate_quotes(s->perform(&to_string));
}
}
Expression* Eval::operator()(String_Schema* s)
{
std::string acc;
bool into_quotes = false;
size_t L = s->length();
if (L > 1) {
if (String_Constant* l = dynamic_cast<String_Constant*>((*s)[0])) {
if (String_Constant* r = dynamic_cast<String_Constant*>((*s)[L - 1])) {
if (l->value()[0] == '"' && r->value()[r->value().size() - 1] == '"') into_quotes = true;
if (l->value()[0] == '\'' && r->value()[r->value().size() - 1] == '\'') into_quotes = true;
}
}
}
for (size_t i = 0; i < L; ++i) {
// really a very special fix, but this is the logic I got from
// analyzing the ruby sass behavior and it actually seems to work
// https://github.com/sass/libsass/issues/1333
if (i == 0 && L > 1 && dynamic_cast<Function_Call*>((*s)[i])) {
Expression* ex = (*s)[i]->perform(this);
if (auto sq = dynamic_cast<String_Quoted*>(ex)) {
if (sq->is_delayed() && ! s->has_interpolants()) {
acc += string_escape(quote(sq->value(), sq->quote_mark()));
} else {
acc += interpolation((*s)[i], into_quotes);
}
} else if (ex) {
acc += interpolation((*s)[i], into_quotes);
}
} else if ((*s)[i]) {
acc += interpolation((*s)[i], into_quotes);
}
}
String_Quoted* str = SASS_MEMORY_NEW(ctx.mem, String_Quoted, s->pstate(), acc);
if (!str->quote_mark()) {
str->value(string_unescape(str->value()));
} else if (str->quote_mark()) {
str->quote_mark('*');
}
str->is_delayed(true);
return str;
}
Expression* Eval::operator()(String_Constant* s)
{
if (!s->is_delayed() && name_to_color(s->value())) {
Color* c = SASS_MEMORY_NEW(ctx.mem, Color, *name_to_color(s->value()));
c->pstate(s->pstate());
c->disp(s->value());
return c;
}
return s;
}
Expression* Eval::operator()(String_Quoted* s)
{
return s;
}
Expression* Eval::operator()(Supports_Operator* c)
{
Expression* left = c->left()->perform(this);
Expression* right = c->right()->perform(this);
Supports_Operator* cc = SASS_MEMORY_NEW(ctx.mem, Supports_Operator,
c->pstate(),
static_cast<Supports_Condition*>(left),
static_cast<Supports_Condition*>(right),
c->operand());
return cc;
}
Expression* Eval::operator()(Supports_Negation* c)
{
Expression* condition = c->condition()->perform(this);
Supports_Negation* cc = SASS_MEMORY_NEW(ctx.mem, Supports_Negation,
c->pstate(),
static_cast<Supports_Condition*>(condition));
return cc;
}
Expression* Eval::operator()(Supports_Declaration* c)
{
Expression* feature = c->feature()->perform(this);
Expression* value = c->value()->perform(this);
Supports_Declaration* cc = SASS_MEMORY_NEW(ctx.mem, Supports_Declaration,
c->pstate(),
feature,
value);
return cc;
}
Expression* Eval::operator()(Supports_Interpolation* c)
{
Expression* value = c->value()->perform(this);
Supports_Interpolation* cc = SASS_MEMORY_NEW(ctx.mem, Supports_Interpolation,
c->pstate(),
value);
return cc;
}
Expression* Eval::operator()(At_Root_Expression* e)
{
Expression* feature = e->feature();
feature = (feature ? feature->perform(this) : 0);
Expression* value = e->value();
value = (value ? value->perform(this) : 0);
Expression* ee = SASS_MEMORY_NEW(ctx.mem, At_Root_Expression,
e->pstate(),
static_cast<String*>(feature),
value,
e->is_interpolated());
return ee;
}
Expression* Eval::operator()(Media_Query* q)
{
To_String to_string(&ctx);
String* t = q->media_type();
t = static_cast<String*>(t ? t->perform(this) : 0);
Media_Query* qq = SASS_MEMORY_NEW(ctx.mem, Media_Query,
q->pstate(),
t,
q->length(),
q->is_negated(),
q->is_restricted());
for (size_t i = 0, L = q->length(); i < L; ++i) {
*qq << static_cast<Media_Query_Expression*>((*q)[i]->perform(this));
}
return qq;
}
Expression* Eval::operator()(Media_Query_Expression* e)
{
Expression* feature = e->feature();
feature = (feature ? feature->perform(this) : 0);
if (feature && dynamic_cast<String_Quoted*>(feature)) {
feature = SASS_MEMORY_NEW(ctx.mem, String_Quoted,
feature->pstate(),
dynamic_cast<String_Quoted*>(feature)->value());
}
Expression* value = e->value();
value = (value ? value->perform(this) : 0);
if (value && dynamic_cast<String_Quoted*>(value)) {
value = SASS_MEMORY_NEW(ctx.mem, String_Quoted,
value->pstate(),
dynamic_cast<String_Quoted*>(value)->value());
}
return SASS_MEMORY_NEW(ctx.mem, Media_Query_Expression,
e->pstate(),
feature,
value,
e->is_interpolated());
}
Expression* Eval::operator()(Null* n)
{
return n;
}
Expression* Eval::operator()(Argument* a)
{
Expression* val = a->value();
val->is_delayed(false);
val = val->perform(this);
val->is_delayed(false);
bool is_rest_argument = a->is_rest_argument();
bool is_keyword_argument = a->is_keyword_argument();
if (a->is_rest_argument()) {
if (val->concrete_type() == Expression::MAP) {
is_rest_argument = false;
is_keyword_argument = true;
}
else if(val->concrete_type() != Expression::LIST) {
List* wrapper = SASS_MEMORY_NEW(ctx.mem, List,
val->pstate(),
0,
SASS_COMMA,
true);
*wrapper << val;
val = wrapper;
}
}
return SASS_MEMORY_NEW(ctx.mem, Argument,
a->pstate(),
val,
a->name(),
is_rest_argument,
is_keyword_argument);
}
Expression* Eval::operator()(Arguments* a)
{
Arguments* aa = SASS_MEMORY_NEW(ctx.mem, Arguments, a->pstate());
for (size_t i = 0, L = a->length(); i < L; ++i) {
*aa << static_cast<Argument*>((*a)[i]->perform(this));
}
return aa;
}
Expression* Eval::operator()(Comment* c)
{
return 0;
}
inline Expression* Eval::fallback_impl(AST_Node* n)
{
return static_cast<Expression*>(n);
}
// All the binary helpers.
bool Eval::eq(Expression* lhs, Expression* rhs)
{
// use compare operator from ast node
return lhs && rhs && *lhs == *rhs;
}
bool Eval::lt(Expression* lhs, Expression* rhs)
{
Number* l = dynamic_cast<Number*>(lhs);
Number* r = dynamic_cast<Number*>(rhs);
if (!l) error("may only compare numbers", lhs->pstate());
if (!r) error("may only compare numbers", rhs->pstate());
// use compare operator from ast node
return *l < *r;
}
Value* Eval::op_numbers(Memory_Manager& mem, enum Sass_OP op, const Number& l, const Number& r, bool compressed, int precision, ParserState* pstate)
{
double lv = l.value();
double rv = r.value();
if (op == Sass_OP::DIV && !rv) {
return SASS_MEMORY_NEW(mem, String_Quoted, pstate ? *pstate : l.pstate(), "Infinity");
}
if (op == Sass_OP::MOD && !rv) {
error("division by zero", pstate ? *pstate : r.pstate());
}
Number tmp(r);
bool strict = op != Sass_OP::MUL && op != Sass_OP::DIV;
tmp.normalize(l.find_convertible_unit(), strict);
std::string l_unit(l.unit());
std::string r_unit(tmp.unit());
if (l_unit != r_unit && !l_unit.empty() && !r_unit.empty() &&
(op == Sass_OP::ADD || op == Sass_OP::SUB)) {
error("Incompatible units: '"+r_unit+"' and '"+l_unit+"'.", pstate ? *pstate : r.pstate());
}
Number* v = SASS_MEMORY_NEW(mem, Number, l);
v->pstate(pstate ? *pstate : l.pstate());
if (l_unit.empty() && (op == Sass_OP::ADD || op == Sass_OP::SUB || op == Sass_OP::MOD)) {
v->numerator_units() = r.numerator_units();
v->denominator_units() = r.denominator_units();
}
if (op == Sass_OP::MUL) {
v->value(ops[op](lv, rv));
for (size_t i = 0, S = r.numerator_units().size(); i < S; ++i) {
v->numerator_units().push_back(r.numerator_units()[i]);
}
for (size_t i = 0, S = r.denominator_units().size(); i < S; ++i) {
v->denominator_units().push_back(r.denominator_units()[i]);
}
}
else if (op == Sass_OP::DIV) {
v->value(ops[op](lv, rv));
for (size_t i = 0, S = r.numerator_units().size(); i < S; ++i) {
v->denominator_units().push_back(r.numerator_units()[i]);
}
for (size_t i = 0, S = r.denominator_units().size(); i < S; ++i) {
v->numerator_units().push_back(r.denominator_units()[i]);
}
} else {
v->value(ops[op](lv, tmp.value()));
}
v->normalize();
return v;
}
Value* Eval::op_number_color(Memory_Manager& mem, enum Sass_OP op, const Number& l, const Color& rh, bool compressed, int precision, ParserState* pstate)
{
Color r(rh);
r.disp("");
double lv = l.value();
switch (op) {
case Sass_OP::ADD:
case Sass_OP::MUL: {
return SASS_MEMORY_NEW(mem, Color,
pstate ? *pstate : l.pstate(),
ops[op](lv, r.r()),
ops[op](lv, r.g()),
ops[op](lv, r.b()),
r.a());
} break;
case Sass_OP::SUB:
case Sass_OP::DIV: {
std::string sep(op == Sass_OP::SUB ? "-" : "/");
std::string color(r.to_string(compressed||!r.sixtuplet(), precision));
return SASS_MEMORY_NEW(mem, String_Quoted,
pstate ? *pstate : l.pstate(),
l.to_string(compressed, precision)
+ sep
+ color);
} break;
case Sass_OP::MOD: {
error("cannot divide a number by a color", pstate ? *pstate : r.pstate());
} break;
default: break; // caller should ensure that we don't get here
}
// unreachable
return SASS_MEMORY_NEW(mem, Color, rh);
}
Value* Eval::op_color_number(Memory_Manager& mem, enum Sass_OP op, const Color& l, const Number& r, bool compressed, int precision, ParserState* pstate)
{
double rv = r.value();
if (op == Sass_OP::DIV && !rv) error("division by zero", pstate ? *pstate : r.pstate());
return SASS_MEMORY_NEW(mem, Color,
pstate ? *pstate : l.pstate(),
ops[op](l.r(), rv),
ops[op](l.g(), rv),
ops[op](l.b(), rv),
l.a());
}
Value* Eval::op_colors(Memory_Manager& mem, enum Sass_OP op, const Color& l, const Color& r, bool compressed, int precision, ParserState* pstate)
{
if (l.a() != r.a()) {
error("alpha channels must be equal when combining colors", pstate ? *pstate : r.pstate());
}
if (op == Sass_OP::DIV && (!r.r() || !r.g() ||!r.b())) {
error("division by zero", pstate ? *pstate : r.pstate());
}
return SASS_MEMORY_NEW(mem, Color,
pstate ? *pstate : l.pstate(),
ops[op](l.r(), r.r()),
ops[op](l.g(), r.g()),
ops[op](l.b(), r.b()),
l.a());
}
Value* Eval::op_strings(Memory_Manager& mem, enum Sass_OP op, Value& lhs, Value& rhs, bool compressed, int precision, ParserState* pstate)
{
Expression::Concrete_Type ltype = lhs.concrete_type();
Expression::Concrete_Type rtype = rhs.concrete_type();
String_Quoted* lqstr = dynamic_cast<String_Quoted*>(&lhs);
String_Quoted* rqstr = dynamic_cast<String_Quoted*>(&rhs);
std::string lstr(lqstr ? lqstr->value() : lhs.to_string(compressed, precision));
std::string rstr(rqstr ? rqstr->value() : rhs.to_string(compressed, precision));
bool l_str_quoted = ((Sass::String*)&lhs) && ((Sass::String*)&lhs)->sass_fix_1291();
bool r_str_quoted = ((Sass::String*)&rhs) && ((Sass::String*)&rhs)->sass_fix_1291();
bool l_str_color = ltype == Expression::STRING && name_to_color(lstr) && !l_str_quoted;
bool r_str_color = rtype == Expression::STRING && name_to_color(rstr) && !r_str_quoted;
if (l_str_color && r_str_color) {
const Color* c_l = name_to_color(lstr);
const Color* c_r = name_to_color(rstr);
return op_colors(mem, op,*c_l, *c_r, compressed, precision);
}
else if (l_str_color && rtype == Expression::COLOR) {
const Color* c_l = name_to_color(lstr);
const Color* c_r = dynamic_cast<const Color*>(&rhs);
return op_colors(mem, op, *c_l, *c_r, compressed, precision);
}
else if (ltype == Expression::COLOR && r_str_color) {
const Color* c_l = dynamic_cast<const Color*>(&lhs);
const Color* c_r = name_to_color(rstr);
return op_colors(mem, op, *c_l, *c_r, compressed, precision);
}
else if (l_str_color && rtype == Expression::NUMBER) {
const Color* c_l = name_to_color(lstr);
const Number* n_r = dynamic_cast<const Number*>(&rhs);
return op_color_number(mem, op, *c_l, *n_r, compressed, precision);
}
else if (ltype == Expression::NUMBER && r_str_color) {
const Number* n_l = dynamic_cast<const Number*>(&lhs);
const Color* c_r = name_to_color(rstr);
return op_number_color(mem, op, *n_l, *c_r, compressed, precision);
}
if (op == Sass_OP::MUL) error("invalid operands for multiplication", lhs.pstate());
if (op == Sass_OP::MOD) error("invalid operands for modulo", lhs.pstate());
std::string sep;
switch (op) {
case Sass_OP::SUB: sep = "-"; break;
case Sass_OP::DIV: sep = "/"; break;
default: break;
}
if (ltype == Expression::NULL_VAL) error("Invalid null operation: \"null plus "+quote(unquote(rstr), '"')+"\".", lhs.pstate());
if (rtype == Expression::NULL_VAL) error("Invalid null operation: \""+quote(unquote(lstr), '"')+" plus null\".", rhs.pstate());
if (ltype == Expression::NUMBER && sep == "/" && rtype == Expression::STRING)
{
return SASS_MEMORY_NEW(mem, String_Constant, lhs.pstate(),
lhs.to_string() + sep + rhs.to_string());
}
if ( (ltype == Expression::STRING || sep == "") &&
(sep != "/" || !rqstr || !rqstr->quote_mark())
) {
char quote_mark = 0;
std::string unq(unquote(lstr + sep + rstr, "e_mark, true));
if (quote_mark && quote_mark != '*') {
return SASS_MEMORY_NEW(mem, String_Constant, lhs.pstate(), quote_mark + unq + quote_mark);
}
return SASS_MEMORY_NEW(mem, String_Quoted, lhs.pstate(), lstr + sep + rstr);
}
return SASS_MEMORY_NEW(mem, String_Constant, lhs.pstate(), (lstr) + sep + quote(rstr));
}
Expression* cval_to_astnode(Memory_Manager& mem, union Sass_Value* v, Context& ctx, Backtrace* backtrace, ParserState pstate)
{
using std::strlen;
using std::strcpy;
Expression* e = 0;
switch (sass_value_get_tag(v)) {
case SASS_BOOLEAN: {
e = SASS_MEMORY_NEW(mem, Boolean, pstate, !!sass_boolean_get_value(v));
} break;
case SASS_NUMBER: {
e = SASS_MEMORY_NEW(mem, Number, pstate, sass_number_get_value(v), sass_number_get_unit(v));
} break;
case SASS_COLOR: {
e = SASS_MEMORY_NEW(mem, Color, pstate, sass_color_get_r(v), sass_color_get_g(v), sass_color_get_b(v), sass_color_get_a(v));
} break;
case SASS_STRING: {
if (sass_string_is_quoted(v))
e = SASS_MEMORY_NEW(mem, String_Quoted, pstate, sass_string_get_value(v));
else {
e = SASS_MEMORY_NEW(mem, String_Constant, pstate, sass_string_get_value(v));
}
} break;
case SASS_LIST: {
List* l = SASS_MEMORY_NEW(mem, List, pstate, sass_list_get_length(v), sass_list_get_separator(v));
for (size_t i = 0, L = sass_list_get_length(v); i < L; ++i) {
*l << cval_to_astnode(mem, sass_list_get_value(v, i), ctx, backtrace, pstate);
}
e = l;
} break;
case SASS_MAP: {
Map* m = SASS_MEMORY_NEW(mem, Map, pstate);
for (size_t i = 0, L = sass_map_get_length(v); i < L; ++i) {
*m << std::make_pair(
cval_to_astnode(mem, sass_map_get_key(v, i), ctx, backtrace, pstate),
cval_to_astnode(mem, sass_map_get_value(v, i), ctx, backtrace, pstate));
}
e = m;
} break;
case SASS_NULL: {
e = SASS_MEMORY_NEW(mem, Null, pstate);
} break;
case SASS_ERROR: {
error("Error in C function: " + std::string(sass_error_get_message(v)), pstate, backtrace);
} break;
case SASS_WARNING: {
error("Warning in C function: " + std::string(sass_warning_get_message(v)), pstate, backtrace);
} break;
}
return e;
}
Selector_List* Eval::operator()(Selector_List* s)
{
std::vector<Selector_List*> rv;
Selector_List* sl = SASS_MEMORY_NEW(ctx.mem, Selector_List, s->pstate());
sl->media_block(s->media_block());
for (size_t i = 0, iL = s->length(); i < iL; ++i) {
rv.push_back(operator()((*s)[i]));
}
// we should actually permutate parent first
// but here we have permutated the selector first
size_t round = 0;
while (round != std::string::npos) {
bool abort = true;
for (size_t i = 0, iL = rv.size(); i < iL; ++i) {
if (rv[i]->length() > round) {
*sl << (*rv[i])[round];
abort = false;
}
}
if (abort) {
round = std::string::npos;
} else {
++ round;
}
}
return sl;
}
Selector_List* Eval::operator()(Complex_Selector* s)
{
return s->parentize(selector(), ctx);
}
Attribute_Selector* Eval::operator()(Attribute_Selector* s)
{
String* attr = s->value();
if (attr) { attr = static_cast<String*>(attr->perform(this)); }
Attribute_Selector* ss = SASS_MEMORY_NEW(ctx.mem, Attribute_Selector, *s);
ss->value(attr);
return ss;
}
Selector_List* Eval::operator()(Selector_Schema* s)
{
To_String to_string;
// the parser will look for a brace to end the selector
std::string result_str(s->contents()->perform(this)->perform(&to_string));
result_str = unquote(Util::rtrim(result_str)) + "{";
Parser p = Parser::from_c_str(result_str.c_str(), ctx, s->pstate());
return operator()(p.parse_selector_list(exp.block_stack.back()->is_root()));
}
Expression* Eval::operator()(Parent_Selector* p)
{
Selector_List* pr = selector();
if (pr) {
exp.selector_stack.pop_back();
pr = operator()(pr);
exp.selector_stack.push_back(pr);
return pr;
} else {
return SASS_MEMORY_NEW(ctx.mem, Null, p->pstate());
}
}
}