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#define SASS_PRELEXER
namespace Sass {
namespace Prelexer {
typedef int (*ctype_predicate)(int);
typedef const char* (*prelexer)(const char*);
// Match a single character literal.
template <char pre>
const char* exactly(const char* src) {
return *src == pre ? src + 1 : 0;
}
// Match a string constant.
template <const char* prefix>
const char* exactly(const char* src) {
const char* pre = prefix;
while (*pre && *src == *pre) ++src, ++pre;
return *pre ? 0 : src;
}
// Match a single character that satifies the supplied ctype predicate.
template <ctype_predicate pred>
const char* class_char(const char* src) {
return pred(*src) ? src + 1 : 0;
}
// Match a single character that is a member of the supplied class.
template <const char* char_class>
const char* class_char(const char* src) {
const char* cc = char_class;
while (*cc && *src != *cc) ++cc;
return *cc ? src + 1 : 0;
}
// Match a sequence of characters that all satisfy the supplied ctype predicate.
template <ctype_predicate pred>
const char* class_chars(const char* src) {
const char* p = src;
while (pred(*p)) ++p;
return p == src ? 0 : p;
}
// Match a sequence of characters that are all members of the supplied class.
template <const char* char_class>
const char* class_chars(const char* src) {
const char* p = src;
while (class_char<char_class>(p)) ++p;
return p == src ? 0 : p;
}
// Match a sequence of characters up to the next newline.
template <const char* prefix>
const char* to_endl(const char* src) {
if (!(src = exactly<prefix>(src))) return 0;
while (*src && *src != '\n') ++src;
return src;
}
// Match a sequence of characters delimited by the supplied chars.
template <char beg, char end, bool esc>
const char* delimited_by(const char* src) {
src = exactly<beg>(src);
if (!src) return 0;
const char* stop;
while (1) {
if (!*src) return 0;
stop = exactly<end>(src);
if (stop && (!esc || *(src - 1) != '\\')) return stop;
src = stop ? stop : src + 1;
}
}
// Match a sequence of characters delimited by the supplied strings.
template <const char* beg, const char* end, bool esc>
const char* delimited_by(const char* src) {
src = exactly<beg>(src);
if (!src) return 0;
const char* stop;
while (1) {
if (!*src) return 0;
stop = exactly<end>(src);
if (stop && (!esc || *(src - 1) != '\\')) return stop;
src = stop ? stop : src + 1;
}
}
// Match any single character.
const char* any_char(const char* src);
// Match any single character except the supplied one.
template <char c>
const char* any_char_except(const char* src) {
return (*src && *src != c) ? src+1 : 0;
}
// Matches zero characters (always succeeds without consuming input).
const char* epsilon(const char*);
// Matches the empty string.
const char* empty(const char*);
// Succeeds of the supplied matcher fails, and vice versa.
template <prelexer mx>
const char* negate(const char* src) {
return mx(src) ? 0 : src;
}
// Tries the matchers in sequence and returns the first match (or none)
template <prelexer mx1, prelexer mx2>
const char* alternatives(const char* src) {
const char* rslt;
(rslt = mx1(src)) || (rslt = mx2(src));
return rslt;
}
// Same as above, but with 3 arguments.
template <prelexer mx1, prelexer mx2, prelexer mx3>
const char* alternatives(const char* src) {
const char* rslt;
(rslt = mx1(src)) || (rslt = mx2(src)) || (rslt = mx3(src));
return rslt;
}
// Same as above, but with 4 arguments.
template <prelexer mx1, prelexer mx2, prelexer mx3, prelexer mx4>
const char* alternatives(const char* src) {
const char* rslt;
(rslt = mx1(src)) || (rslt = mx2(src)) ||
(rslt = mx3(src)) || (rslt = mx4(src));
return rslt;
}
// Same as above, but with 5 arguments.
template <prelexer mx1, prelexer mx2, prelexer mx3,
prelexer mx4, prelexer mx5>
const char* alternatives(const char* src) {
const char* rslt;
(rslt = mx1(src)) || (rslt = mx2(src)) || (rslt = mx3(src)) ||
(rslt = mx4(src)) || (rslt = mx5(src));
return rslt;
}
// Same as above, but with 6 arguments.
template <prelexer mx1, prelexer mx2, prelexer mx3,
prelexer mx4, prelexer mx5, prelexer mx6>
const char* alternatives(const char* src) {
const char* rslt;
(rslt = mx1(src)) || (rslt = mx2(src)) || (rslt = mx3(src)) ||
(rslt = mx4(src)) || (rslt = mx5(src)) || (rslt = mx6(src));
return rslt;
}
// Same as above, but with 7 arguments.
template <prelexer mx1, prelexer mx2,
prelexer mx3, prelexer mx4,
prelexer mx5, prelexer mx6,
prelexer mx7>
const char* alternatives(const char* src) {
const char* rslt = src;
(rslt = mx1(rslt)) || (rslt = mx2(rslt)) ||
(rslt = mx3(rslt)) || (rslt = mx4(rslt)) ||
(rslt = mx5(rslt)) || (rslt = mx6(rslt)) ||
(rslt = mx7(rslt));
return rslt;
}
// Same as above, but with 8 arguments.
template <prelexer mx1, prelexer mx2,
prelexer mx3, prelexer mx4,
prelexer mx5, prelexer mx6,
prelexer mx7, prelexer mx8>
const char* alternatives(const char* src) {
const char* rslt = src;
(rslt = mx1(rslt)) || (rslt = mx2(rslt)) ||
(rslt = mx3(rslt)) || (rslt = mx4(rslt)) ||
(rslt = mx5(rslt)) || (rslt = mx6(rslt)) ||
(rslt = mx7(rslt)) || (rslt = mx8(rslt));
return rslt;
}
// Tries the matchers in sequence and succeeds if they all succeed.
template <prelexer mx1, prelexer mx2>
const char* sequence(const char* src) {
const char* rslt = src;
(rslt = mx1(rslt)) && (rslt = mx2(rslt));
return rslt;
}
// Same as above, but with 3 arguments.
template <prelexer mx1, prelexer mx2, prelexer mx3>
const char* sequence(const char* src) {
const char* rslt = src;
(rslt = mx1(rslt)) && (rslt = mx2(rslt)) && (rslt = mx3(rslt));
return rslt;
}
// Same as above, but with 4 arguments.
template <prelexer mx1, prelexer mx2, prelexer mx3, prelexer mx4>
const char* sequence(const char* src) {
const char* rslt = src;
(rslt = mx1(rslt)) && (rslt = mx2(rslt)) &&
(rslt = mx3(rslt)) && (rslt = mx4(rslt));
return rslt;
}
// Same as above, but with 5 arguments.
template <prelexer mx1, prelexer mx2,
prelexer mx3, prelexer mx4,
prelexer mx5>
const char* sequence(const char* src) {
const char* rslt = src;
(rslt = mx1(rslt)) && (rslt = mx2(rslt)) &&
(rslt = mx3(rslt)) && (rslt = mx4(rslt)) &&
(rslt = mx5(rslt));
return rslt;
}
// Same as above, but with 6 arguments.
template <prelexer mx1, prelexer mx2,
prelexer mx3, prelexer mx4,
prelexer mx5, prelexer mx6>
const char* sequence(const char* src) {
const char* rslt = src;
(rslt = mx1(rslt)) && (rslt = mx2(rslt)) &&
(rslt = mx3(rslt)) && (rslt = mx4(rslt)) &&
(rslt = mx5(rslt)) && (rslt = mx6(rslt));
return rslt;
}
// Same as above, but with 7 arguments.
template <prelexer mx1, prelexer mx2,
prelexer mx3, prelexer mx4,
prelexer mx5, prelexer mx6,
prelexer mx7>
const char* sequence(const char* src) {
const char* rslt = src;
(rslt = mx1(rslt)) && (rslt = mx2(rslt)) &&
(rslt = mx3(rslt)) && (rslt = mx4(rslt)) &&
(rslt = mx5(rslt)) && (rslt = mx6(rslt)) &&
(rslt = mx7(rslt));
return rslt;
}
// Match a pattern or not. Always succeeds.
template <prelexer mx>
const char* optional(const char* src) {
const char* p = mx(src);
return p ? p : src;
}
// Match zero or more of the supplied pattern
template <prelexer mx>
const char* zero_plus(const char* src) {
const char* p = mx(src);
while (p) src = p, p = mx(src);
return src;
}
// Match one or more of the supplied pattern
template <prelexer mx>
const char* one_plus(const char* src) {
const char* p = mx(src);
if (!p) return 0;
while (p) src = p, p = mx(src);
return src;
}
// Match a single character satisfying the ctype predicates.
const char* space(const char* src);
const char* alpha(const char* src);
const char* digit(const char* src);
const char* xdigit(const char* src);
const char* alnum(const char* src);
const char* punct(const char* src);
// Match multiple ctype characters.
const char* spaces(const char* src);
const char* alphas(const char* src);
const char* digits(const char* src);
const char* xdigits(const char* src);
const char* alnums(const char* src);
const char* puncts(const char* src);
// Match a line comment.
const char* line_comment(const char* src);
// Match a block comment.
const char* block_comment(const char* src);
// Match either.
const char* comment(const char* src);
// Match double- and single-quoted strings.
const char* double_quoted_string(const char* src);
const char* single_quoted_string(const char* src);
const char* string_constant(const char* src);
// Match interpolants.
const char* interpolant(const char* src);
// Whitespace handling.
const char* optional_spaces(const char* src);
const char* optional_comment(const char* src);
const char* spaces_and_comments(const char* src);
const char* no_spaces(const char* src);
// Match a CSS identifier.
const char* identifier(const char* src);
// Match interpolant schemas
const char* identifier_schema(const char* src);
const char* value_schema(const char* src);
const char* filename(const char* src);
const char* filename_schema(const char* src);
const char* url_schema(const char* src);
const char* url_value(const char* src);
// Match CSS '@' keywords.
const char* at_keyword(const char* src);
const char* import(const char* src);
const char* media(const char* src);
const char* mixin(const char* src);
const char* function(const char* src);
const char* return_directive(const char* src);
const char* include(const char* src);
const char* extend(const char* src);
const char* if_directive(const char* src);
const char* else_directive(const char* src);
const char* elseif_directive(const char* src);
const char* for_directive(const char* src);
const char* from(const char* src);
const char* to(const char* src);
const char* through(const char* src);
const char* each_directive(const char* src);
const char* in(const char* src);
const char* while_directive(const char* src);
const char* warn(const char* src);
const char* directive(const char* src);
// Match CSS type selectors
const char* namespace_prefix(const char* src);
const char* type_selector(const char* src);
const char* universal(const char* src);
// Match CSS id names.
const char* id_name(const char* src);
// Match CSS class names.
const char* class_name(const char* src);
// Match CSS numeric constants.
const char* sign(const char* src);
const char* unsigned_number(const char* src);
const char* number(const char* src);
const char* coefficient(const char* src);
const char* binomial(const char* src);
const char* percentage(const char* src);
const char* dimension(const char* src);
const char* hex(const char* src);
const char* rgb_prefix(const char* src);
// Match CSS uri specifiers.
const char* uri_prefix(const char* src);
const char* uri(const char* src);
const char* url(const char* src);
// Match CSS "!important" keyword.
const char* important(const char* src);
// Match Sass "!default" keyword.
const char* default_flag(const char* src);
// Match CSS pseudo-class/element prefixes
const char* pseudo_prefix(const char* src);
// Match CSS function call openers.
const char* functional(const char* src);
const char* pseudo_not(const char* src);
// Match CSS 'odd' and 'even' keywords for functional pseudo-classes.
const char* even(const char* src);
const char* odd(const char* src);
// Match CSS attribute-matching operators.
const char* exact_match(const char* src);
const char* class_match(const char* src);
const char* dash_match(const char* src);
const char* prefix_match(const char* src);
const char* suffix_match(const char* src);
const char* substring_match(const char* src);
// Match CSS combinators.
const char* adjacent_to(const char* src);
const char* precedes(const char* src);
const char* parent_of(const char* src);
const char* ancestor_of(const char* src);
// Match SCSS variable names.
const char* variable(const char* src);
// Match Sass boolean keywords.
const char* true_val(const char* src);
const char* false_val(const char* src);
const char* and_op(const char* src);
const char* or_op(const char* src);
const char* not_op(const char* src);
const char* eq_op(const char* src);
const char* neq_op(const char* src);
const char* gt_op(const char* src);
const char* gte_op(const char* src);
const char* lt_op(const char* src);
const char* lte_op(const char* src);
// Path matching functions.
const char* folder(const char* src);
const char* folders(const char* src);
// Utility functions for finding and counting characters in a string.
template<char c>
const char* find_first(const char* src) {
while (*src && *src != c) ++src;
return *src ? src : 0;
}
template<prelexer mx>
const char* find_first(const char* src) {
while (*src && !mx(src)) ++src;
return *src ? src : 0;
}
template<prelexer mx>
const char* find_first_in_interval(const char* beg, const char* end) {
while ((beg < end) && *beg) {
if (mx(beg)) return beg;
++beg;
}
return 0;
}
template <char c>
unsigned int count_interval(const char* beg, const char* end) {
unsigned int counter = 0;
while (beg < end && *beg) {
if (*beg == c) ++counter;
++beg;
}
return counter;
}
template <prelexer mx>
unsigned int count_interval(const char* beg, const char* end) {
unsigned int counter = 0;
while (beg < end && *beg) {
const char* p;
if (p = mx(beg)) {
++counter;
beg = p;
}
else {
++beg;
}
}
return counter;
}
}
}
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