1 #ifndef SASS_PRELEXER_H
2 #define SASS_PRELEXER_H
8 // using namespace Lexer;
11 //####################################
12 // KEYWORD "REGEX" MATCHERS
13 //####################################
15 // Match Sass boolean keywords.
16 const char* kwd_true(const char* src);
17 const char* kwd_false(const char* src);
18 const char* kwd_only(const char* src);
19 const char* kwd_and(const char* src);
20 const char* kwd_or(const char* src);
21 const char* kwd_not(const char* src);
22 const char* kwd_eq(const char* src);
23 const char* kwd_neq(const char* src);
24 const char* kwd_gt(const char* src);
25 const char* kwd_gte(const char* src);
26 const char* kwd_lt(const char* src);
27 const char* kwd_lte(const char* src);
29 // Match standard control chars
30 const char* kwd_at(const char* src);
31 const char* kwd_dot(const char* src);
32 const char* kwd_comma(const char* src);
33 const char* kwd_colon(const char* src);
34 const char* kwd_slash(const char* src);
35 const char* kwd_star(const char* src);
36 const char* kwd_plus(const char* src);
37 const char* kwd_minus(const char* src);
39 //####################################
40 // SPECIAL "REGEX" CONSTRUCTS
41 //####################################
43 // Match a sequence of characters delimited by the supplied chars.
44 template <char beg, char end, bool esc>
45 const char* delimited_by(const char* src) {
46 src = exactly<beg>(src);
51 stop = exactly<end>(src);
52 if (stop && (!esc || *(src - 1) != '\\')) return stop;
53 src = stop ? stop : src + 1;
57 // skip to delimiter (mx) inside given range
58 // this will savely skip over all quoted strings
59 // recursive skip stuff delimited by start/stop
60 // first start/opener must be consumed already!
61 template<prelexer start, prelexer stop>
62 const char* skip_over_scopes(const char* src, const char* end) {
65 bool in_squote = false;
66 bool in_dquote = false;
67 // bool in_braces = false;
71 // check for abort condition
72 if (end && src >= end) break;
74 // has escaped sequence?
76 ++ src; // skip this (and next)
78 else if (*src == '"') {
79 in_dquote = ! in_dquote;
81 else if (*src == '\'') {
82 in_squote = ! in_squote;
84 else if (in_dquote || in_squote) {
85 // take everything literally
88 // find another opener inside?
89 else if (const char* pos = start(src)) {
90 ++ level; // increase counter
91 src = pos - 1; // advance position
94 // look for the closer (maybe final, maybe not)
95 else if (const char* final = stop(src)) {
96 // only close one level?
97 if (level > 0) -- level;
98 // return position at end of stop
99 // delimiter may be multiple chars
112 // skip to a skip delimited by parentheses
113 // uses smart `skip_over_scopes` internally
114 const char* parenthese_scope(const char* src);
116 // skip to delimiter (mx) inside given range
117 // this will savely skip over all quoted strings
118 // recursive skip stuff delimited by start/stop
119 // first start/opener must be consumed already!
120 template<prelexer start, prelexer stop>
121 const char* skip_over_scopes(const char* src) {
122 return skip_over_scopes<start, stop>(src, 0);
125 // Match a sequence of characters delimited by the supplied chars.
126 template <prelexer start, prelexer stop>
127 const char* recursive_scopes(const char* src) {
130 // abort if not found
132 // parse the rest until final closer
133 return skip_over_scopes<start, stop>(src);
136 // Match a sequence of characters delimited by the supplied strings.
137 template <const char* beg, const char* end, bool esc>
138 const char* delimited_by(const char* src) {
139 src = exactly<beg>(src);
144 stop = exactly<end>(src);
145 if (stop && (!esc || *(src - 1) != '\\')) return stop;
146 src = stop ? stop : src + 1;
150 // Tries to match a certain number of times (between the supplied interval).
151 template<prelexer mx, size_t lo, size_t hi>
152 const char* between(const char* src) {
153 for (size_t i = 0; i < lo; ++i) {
157 for (size_t i = lo; i <= hi; ++i) {
158 const char* new_src = mx(src);
159 if (!new_src) return src;
165 // equivalent of STRING_REGULAR_EXPRESSIONS
166 const char* re_string_double_open(const char* src);
167 const char* re_string_double_close(const char* src);
168 const char* re_string_single_open(const char* src);
169 const char* re_string_single_close(const char* src);
170 const char* re_string_uri_open(const char* src);
171 const char* re_string_uri_close(const char* src);
173 // Match a line comment.
174 const char* line_comment(const char* src);
176 // Match a block comment.
177 const char* block_comment(const char* src);
179 const char* comment(const char* src);
180 // Match double- and single-quoted strings.
181 const char* double_quoted_string(const char* src);
182 const char* single_quoted_string(const char* src);
183 const char* quoted_string(const char* src);
184 // Match interpolants.
185 const char* interpolant(const char* src);
186 // Match number prefix ([\+\-]+)
187 const char* number_prefix(const char* src);
189 // Match zero plus white-space or line_comments
190 const char* optional_css_whitespace(const char* src);
191 const char* css_whitespace(const char* src);
192 // Match optional_css_whitepace plus block_comments
193 const char* optional_css_comments(const char* src);
194 const char* css_comments(const char* src);
196 // Match one backslash escaped char
197 const char* escape_seq(const char* src);
199 // Match CSS css variables.
200 const char* custom_property_name(const char* src);
201 // Match a CSS identifier.
202 const char* identifier(const char* src);
203 const char* identifier_alpha(const char* src);
204 const char* identifier_alnum(const char* src);
205 const char* strict_identifier(const char* src);
206 const char* strict_identifier_alpha(const char* src);
207 const char* strict_identifier_alnum(const char* src);
208 // Match a CSS unit identifier.
209 const char* one_unit(const char* src);
210 const char* multiple_units(const char* src);
211 const char* unit_identifier(const char* src);
212 // const char* strict_identifier_alnums(const char* src);
213 // Match reference selector.
214 const char* re_reference_combinator(const char* src);
215 const char* static_reference_combinator(const char* src);
216 const char* schema_reference_combinator(const char* src);
218 // Match interpolant schemas
219 const char* identifier_schema(const char* src);
220 const char* value_schema(const char* src);
221 const char* sass_value(const char* src);
222 // const char* filename(const char* src);
223 // const char* filename_schema(const char* src);
224 // const char* url_schema(const char* src);
225 // const char* url_value(const char* src);
226 const char* vendor_prefix(const char* src);
228 const char* re_special_directive(const char* src);
229 const char* re_prefixed_directive(const char* src);
230 const char* re_almost_any_value_token(const char* src);
232 // Match CSS '@' keywords.
233 const char* at_keyword(const char* src);
234 const char* kwd_import(const char* src);
235 const char* kwd_at_root(const char* src);
236 const char* kwd_with_directive(const char* src);
237 const char* kwd_without_directive(const char* src);
238 const char* kwd_media(const char* src);
239 const char* kwd_supports_directive(const char* src);
240 // const char* keyframes(const char* src);
241 // const char* keyf(const char* src);
242 const char* kwd_mixin(const char* src);
243 const char* kwd_function(const char* src);
244 const char* kwd_return_directive(const char* src);
245 const char* kwd_include_directive(const char* src);
246 const char* kwd_content_directive(const char* src);
247 const char* kwd_charset_directive(const char* src);
248 const char* kwd_extend(const char* src);
250 const char* unicode_seq(const char* src);
252 const char* kwd_if_directive(const char* src);
253 const char* kwd_else_directive(const char* src);
254 const char* elseif_directive(const char* src);
256 const char* kwd_for_directive(const char* src);
257 const char* kwd_from(const char* src);
258 const char* kwd_to(const char* src);
259 const char* kwd_through(const char* src);
261 const char* kwd_each_directive(const char* src);
262 const char* kwd_in(const char* src);
264 const char* kwd_while_directive(const char* src);
266 const char* re_nothing(const char* src);
267 const char* re_type_selector2(const char* src);
269 const char* re_special_fun(const char* src);
271 const char* kwd_warn(const char* src);
272 const char* kwd_err(const char* src);
273 const char* kwd_dbg(const char* src);
275 const char* kwd_null(const char* src);
277 const char* re_selector_list(const char* src);
278 const char* re_type_selector(const char* src);
279 const char* re_static_expression(const char* src);
281 // identifier that can start with hyphens
282 const char* css_identifier(const char* src);
283 const char* css_ip_identifier(const char* src);
285 // Match CSS type selectors
286 const char* namespace_schema(const char* src);
287 const char* namespace_prefix(const char* src);
288 const char* type_selector(const char* src);
289 const char* hyphens_and_identifier(const char* src);
290 const char* hyphens_and_name(const char* src);
291 const char* universal(const char* src);
292 // Match CSS id names.
293 const char* id_name(const char* src);
294 // Match CSS class names.
295 const char* class_name(const char* src);
296 // Attribute name in an attribute selector
297 const char* attribute_name(const char* src);
298 // Match placeholder selectors.
299 const char* placeholder(const char* src);
300 // Match CSS numeric constants.
301 const char* op(const char* src);
302 const char* sign(const char* src);
303 const char* unsigned_number(const char* src);
304 const char* number(const char* src);
305 const char* coefficient(const char* src);
306 const char* binomial(const char* src);
307 const char* percentage(const char* src);
308 const char* ampersand(const char* src);
309 const char* dimension(const char* src);
310 const char* hex(const char* src);
311 const char* hexa(const char* src);
312 const char* hex0(const char* src);
313 // const char* rgb_prefix(const char* src);
314 // Match CSS uri specifiers.
315 const char* uri_prefix(const char* src);
316 // Match CSS "!important" keyword.
317 const char* kwd_important(const char* src);
318 // Match CSS "!optional" keyword.
319 const char* kwd_optional(const char* src);
320 // Match Sass "!default" keyword.
321 const char* default_flag(const char* src);
322 const char* global_flag(const char* src);
323 // Match CSS pseudo-class/element prefixes
324 const char* pseudo_prefix(const char* src);
325 // Match CSS function call openers.
326 const char* re_functional(const char* src);
327 const char* re_pseudo_selector(const char* src);
328 const char* functional_schema(const char* src);
329 const char* pseudo_not(const char* src);
330 // Match CSS 'odd' and 'even' keywords for functional pseudo-classes.
331 const char* even(const char* src);
332 const char* odd(const char* src);
333 // Match CSS attribute-matching operators.
334 const char* exact_match(const char* src);
335 const char* class_match(const char* src);
336 const char* dash_match(const char* src);
337 const char* prefix_match(const char* src);
338 const char* suffix_match(const char* src);
339 const char* substring_match(const char* src);
340 // Match CSS combinators.
341 // const char* adjacent_to(const char* src);
342 // const char* precedes(const char* src);
343 // const char* parent_of(const char* src);
344 // const char* ancestor_of(const char* src);
346 // Match SCSS variable names.
347 const char* variable(const char* src);
348 const char* calc_fn_call(const char* src);
351 const char* ie_progid(const char* src);
352 const char* ie_expression(const char* src);
353 const char* ie_property(const char* src);
354 const char* ie_keyword_arg(const char* src);
355 const char* ie_keyword_arg_value(const char* src);
356 const char* ie_keyword_arg_property(const char* src);
358 // characters that terminate parsing of a list
359 const char* list_terminator(const char* src);
360 const char* space_list_terminator(const char* src);
363 const char* H(const char* src);
364 const char* W(const char* src);
365 // `UNICODE` makes VS sad
366 const char* UUNICODE(const char* src);
367 const char* NONASCII(const char* src);
368 const char* ESCAPE(const char* src);
369 const char* real_uri_suffix(const char* src);
370 // const char* real_uri_prefix(const char* src);
371 const char* real_uri_value(const char* src);
373 // Path matching functions.
374 // const char* folder(const char* src);
375 // const char* folders(const char* src);
378 const char* static_string(const char* src);
379 const char* static_component(const char* src);
380 const char* static_property(const char* src);
381 const char* static_value(const char* src);
383 // Utility functions for finding and counting characters in a string.
385 const char* find_first(const char* src) {
386 while (*src && *src != c) ++src;
387 return *src ? src : 0;
389 template<prelexer mx>
390 const char* find_first(const char* src) {
391 while (*src && !mx(src)) ++src;
392 return *src ? src : 0;
394 template<prelexer mx>
395 const char* find_first_in_interval(const char* beg, const char* end) {
397 while ((beg < end) && *beg) {
398 if (esc) esc = false;
399 else if (*beg == '\\') esc = true;
400 else if (mx(beg)) return beg;
405 template<prelexer mx, prelexer skip>
406 const char* find_first_in_interval(const char* beg, const char* end) {
408 while ((beg < end) && *beg) {
409 if (esc) esc = false;
410 else if (*beg == '\\') esc = true;
411 else if (const char* pos = skip(beg)) beg = pos;
412 else if (mx(beg)) return beg;
417 template <prelexer mx>
418 unsigned int count_interval(const char* beg, const char* end) {
419 unsigned int counter = 0;
421 while (beg < end && *beg) {
426 } else if (*beg == '\\') {
429 } else if ((p = mx(beg))) {
440 template <size_t size, prelexer mx, prelexer pad>
441 const char* padded_token(const char* src)
444 const char* pos = src;
450 if (!pad(pos)) break;
453 return got ? pos : 0;
456 template <size_t min, size_t max, prelexer mx>
457 const char* minmax_range(const char* src)
460 const char* pos = src;
465 if (got < min) return 0;
466 if (got > max) return 0;
470 template <char min, char max>
471 const char* char_range(const char* src)
473 if (*src < min) return 0;
474 if (*src > max) return 0;