53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
#include <tree_sitter/parser.h>
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#include <wctype.h>
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enum TokenType {
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DESCENDANT_OP,
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};
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void *tree_sitter_css_external_scanner_create() { return NULL; }
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void tree_sitter_css_external_scanner_destroy(void *p) {}
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void tree_sitter_css_external_scanner_reset(void *p) {}
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unsigned tree_sitter_css_external_scanner_serialize(void *p, char *buffer) { return 0; }
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void tree_sitter_css_external_scanner_deserialize(void *p, const char *b, unsigned n) {}
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bool tree_sitter_css_external_scanner_scan(void *payload, TSLexer *lexer, const bool *valid_symbols) {
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if (iswspace(lexer->lookahead) && valid_symbols[DESCENDANT_OP]) {
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lexer->result_symbol = DESCENDANT_OP;
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lexer->advance(lexer, true);
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while (iswspace(lexer->lookahead)) {
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lexer->advance(lexer, true);
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}
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lexer->mark_end(lexer);
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if (
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lexer->lookahead == '#' ||
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lexer->lookahead == '.' ||
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lexer->lookahead == '[' ||
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lexer->lookahead == '-' ||
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iswalnum(lexer->lookahead)
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) {
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return true;
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}
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if (lexer->lookahead == ':') {
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lexer->advance(lexer, false);
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if (iswspace(lexer->lookahead)) return false;
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for (;;) {
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if (
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lexer->lookahead == ';' ||
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lexer->lookahead == '}' ||
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lexer->eof(lexer)
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) return false;
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if (lexer->lookahead == '{') {
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return true;
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}
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lexer->advance(lexer, false);
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}
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}
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}
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return false;
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}
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