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|
%option batch
%option c++
%option noyywrap
%option 8bit
%option stack
%option yylineno
%option yyclass="json::jsonParser"
%option prefix="jsonBase"
%{
#include <string>
#include <utility>
class jsonBaseFlexLexer;
#include "jsonParse.h"
#pragma GCC diagnostic ignored "-Wsign-compare"
#pragma GCC diagnostic ignored "-Wimplicit-fallthrough"
#ifdef __clang__
#pragma clang diagnostic ignored "-Wnull-conversion"
#endif
[[maybe_unused]]static constexpr auto x=getpid;
%}
beginobj "{"
endobj "}"
beginarray "["
endarray "]"
beginstr "\""
endstr "\""
true "true"
false "false"
null "null"
number [-+]?[0-9]+(\.[0-9]+)?
colon ":"
separator ","
escape "\\"
text [^\\\"]*
%x OBJECT_ITEM
%x OBJECT_ITEM_OR_END
%x OBJECT_NEXT
%x ARRAY_ITEM
%x ARRAY_NEXT
%x COLON
%x TEXT
%x STRING
%x ESCAPE
%%
<ARRAY_ITEM,INITIAL>{true} {
pushBoolean(true);
yy_pop_state();
}
<ARRAY_ITEM,INITIAL>{false} {
pushBoolean(false);
yy_pop_state();
}
<ARRAY_ITEM,INITIAL>{number} {
pushNumber(std::strtof(YYText(), NULL));
yy_pop_state();
}
<ARRAY_ITEM,INITIAL>{null} {
pushNull();
yy_pop_state();
}
<ARRAY_ITEM,INITIAL,OBJECT_ITEM,OBJECT_ITEM_OR_END>{beginstr} {
yy_push_state(STRING);
}
<ARRAY_ITEM,INITIAL>{beginobj} {
beginObject();
BEGIN(OBJECT_ITEM_OR_END);
}
<ARRAY_ITEM,INITIAL>{beginarray} {
beginArray();
BEGIN(ARRAY_NEXT);
yy_push_state(ARRAY_ITEM);
}
<STRING>{endstr} {
yy_pop_state();
switch (YY_START) {
case ARRAY_ITEM:
case INITIAL:
pushText(std::move(buf));
yy_pop_state();
break;
case OBJECT_ITEM:
case OBJECT_ITEM_OR_END:
pushKey(std::move(buf));
BEGIN(COLON);
break;
}
buf.clear();
}
<OBJECT_NEXT,OBJECT_ITEM_OR_END>{endobj} {
endObject();
yy_pop_state();
}
<ARRAY_ITEM>{endarray} {
endArray();
yy_pop_state();
yy_pop_state();
}
<ARRAY_NEXT>{endarray} {
endArray();
yy_pop_state();
}
<COLON>{colon} {
BEGIN(OBJECT_NEXT);
yy_push_state(INITIAL);
}
<OBJECT_NEXT>{separator} {
BEGIN(OBJECT_ITEM);
}
<ARRAY_NEXT>{separator} {
yy_push_state(INITIAL);
}
<STRING>{escape} {
yy_push_state(ESCAPE);
}
<ESCAPE>"\"" { buf += "\""; yy_pop_state(); }
<ESCAPE>"\\" { buf += "\\"; yy_pop_state(); }
<ESCAPE>"/" { buf += "/"; yy_pop_state(); }
<ESCAPE>"b" { buf += "\b"; yy_pop_state(); }
<ESCAPE>"f" { buf += "\f"; yy_pop_state(); }
<ESCAPE>"n" { buf += "\n"; yy_pop_state(); }
<ESCAPE>"r" { buf += "\r"; yy_pop_state(); }
<ESCAPE>"t" { buf += "\t"; yy_pop_state(); }
<ESCAPE>"u"[0-9a-fA-Z]{4} {
appendEscape(YYText(), buf);
yy_pop_state();
}
<STRING>{text} {
buf += YYText();
}
<*>[ \t\r\n\f] {
}
<*>. {
LexerError("Unexpected input");
}
|
