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|
%{
// Copyright Eran Ifrah(c)
%}
%{
/*************** Includes and Defines *****************************/
#include "string"
#include "vector"
#include "stdio.h"
#include "map"
#include "expression_result.h"
#define YYSTYPE std::string
#define YYDEBUG 0 /* get the pretty debugging code to compile*/
void cl_expr_error(char *string);
static ExpressionResult result;
//---------------------------------------------
// externs defined in the lexer
//---------------------------------------------
extern char *cl_expr_text;
extern int cl_expr_lex();
extern int cl_expr_parse();
extern int cl_expr_lineno;
extern std::vector<std::string> currentScope;
extern bool setExprLexerInput(const std::string &in);
extern void cl_expr_lex_clean();
/*************** Standard ytab.c continues here *********************/
%}
/*************************************************************************/
/* This group is used by the C/C++ language parser */
%token LE_AUTO LE_DOUBLE LE_INT LE_STRUCT
%token LE_BREAK LE_ELSE LE_LONG LE_SWITCH
%token LE_CASE LE_ENUM LE_REGISTER LE_TYPEDEF
%token LE_CHAR LE_EXTERN LE_RETURN LE_UNION
%token LE_CONST LE_FLOAT LE_SHORT LE_UNSIGNED
%token LE_CONTINUE LE_FOR LE_SIGNED LE_VOID
%token LE_DEFAULT LE_GOTO LE_SIZEOF LE_VOLATILE
%token LE_DO LE_IF LE_STATIC LE_WHILE
/* The following are used in C++ only. ANSI C would call these IDENTIFIERs */
%token LE_NEW LE_DELETE
%token LE_THIS
%token LE_OPERATOR
%token LE_CLASS
%token LE_PUBLIC LE_PROTECTED LE_PRIVATE
%token LE_VIRTUAL LE_FRIEND
%token LE_INLINE LE_OVERLOAD
%token LE_TEMPLATE LE_TYPENAME
%token LE_THROW LE_CATCH
/* ANSI C Grammar suggestions */
%token LE_IDENTIFIER LE_STRINGliteral
%token LE_FLOATINGconstant LE_INTEGERconstant LE_CHARACTERconstant
%token LE_OCTALconstant LE_HEXconstant
%token LE_POUNDPOUND LE_CComment LE_CPPComment LE_NAMESPACE LE_USING
/* New Lexical element, whereas ANSI C suggested non-terminal */
%token LE_TYPEDEFname
/* Multi-Character operators */
%token LE_ARROW /* -> */
%token LE_ICR LE_DECR /* ++ -- */
%token LE_LS LE_RS /* << >> */
%token LE_LE LE_GE LE_EQ LE_NE /* <= >= == != */
%token LE_ANDAND LE_OROR /* && || */
%token LE_ELLIPSIS /* ... */
/* Following are used in C++, not ANSI C */
%token LE_CLCL /* :: */
%token LE_DOTstar LE_ARROWstar /* .* ->* */
/* modifying assignment operators */
%token LE_MULTassign LE_DIVassign LE_MODassign /* *= /= %= */
%token LE_PLUSassign LE_MINUSassign /* += -= */
%token LE_LSassign LE_RSassign /* <<= >>= */
%token LE_ANDassign LE_ERassign LE_ORassign /* &= ^= |= */
%token LE_MACRO
%token LE_DYNAMIC_CAST
%token LE_STATIC_CAST
%token LE_CONST_CAST
%token LE_REINTERPRET_CAST
%start translation_unit
%%
/* ========================================================================*/
/* find declarations */
/* ========================================================================*/
translation_unit : /*empty*/
| translation_unit primary_expr
;
primary_expr : {result.Reset();} simple_expr
| error {
yyclearin; //clear lookahead token
yyerrok;
//fprintf(stderr, "CodeLite: syntax error, unexpected token '%s' found at line %d \n", cl_expr_text, cl_expr_lineno);
//fflush(stderr);
expr_syncParser();
}
;
const_spec : /* empty */ {$$ = ""; }
| LE_CONST { $$ = $1; }
;
basic_type_name:
LE_INT { $$ = $1; }
| LE_CHAR { $$ = $1; }
| LE_SHORT { $$ = $1; }
| LE_LONG { $$ = $1; }
| LE_FLOAT { $$ = $1; }
| LE_DOUBLE { $$ = $1; }
| LE_SIGNED { $$ = $1; }
| LE_UNSIGNED { $$ = $1; }
| LE_VOID { $$ = $1; }
;
parameter_list : /* empty */ {$$ = "";}
| template_parameter {$$ = $1;}
| parameter_list ',' template_parameter {$$ = $1 + $2 + $3;}
;
template_parameter : const_spec nested_scope_specifier LE_IDENTIFIER special_star_amp
{$$ = $1 + " " + $2 + " " + $3 +$4;}
| const_spec nested_scope_specifier basic_type_name special_star_amp
{$$ = $1 + " " + $2 + " " + $3 +$4;}
| const_spec nested_scope_specifier LE_IDENTIFIER '<' parameter_list '>' special_star_amp
{$$ = $1 + " " + $2 + " " + $3 +$4 + $5 + $6;}
;
simple_expr : stmnt_starter special_cast '<' cast_type '>' '('
{
expr_FuncArgList();
$$ = $4;
result.m_isaType = true;
result.m_name = $4;
result.m_isFunc = false;
printf("Rule 1\n");
//result.Print();
}
| stmnt_starter LE_THIS
{
$$ = $2;
result.m_isaType = false;
result.m_name = $$;
result.m_isFunc = false;
result.m_isThis = true;
result.m_isPtr = true;
//result.Print();
}
| stmnt_starter '*' LE_THIS
{
$$ = $3;
result.m_isaType = false;
result.m_name = $$;
result.m_isFunc = false;
result.m_isThis = true;
//result.Print();
}
| stmnt_starter '*' identifier_name
{
$$ = $3;
result.m_isaType = false;
result.m_name = $$;
result.m_isFunc = false;
result.m_isThis = false;
result.m_isPtr = false;
//result.Print();
}
| stmnt_starter '(' cast_type ')' special_star_amp identifier_name
{
$$ = $3;
result.m_isaType = true;
result.m_name = $$;
result.m_isFunc = false;
result.m_isThis = false;
//result.Print();
}
| stmnt_starter nested_scope_specifier identifier_name optional_template_init_list optinal_postifx
{
result.m_isaType = false;
result.m_name = $3;
result.m_isThis = false;
$2.erase($2.find_last_not_of(":")+1);
result.m_scope = $2;
result.m_isTemplate = $4.empty() ? false : true;
result.m_templateInitList = $4;
//result.Print();
}
| stmnt_starter '(' '(' cast_type ')' special_star_amp identifier_name ')'
{
$$ = $4;
result.m_isaType = true;
result.m_name = $$;
result.m_isFunc = false;
result.m_isThis = false;
//result.Print();
}
;
identifier_name : LE_IDENTIFIER array_brackets {$$ = $1;}
;
optional_template_init_list: /*empty*/ {$$ = "";}
| '<' parameter_list '>' {$$ = $1 + $2 + $3;}
;
optinal_postifx: /*empty*/ {$$ = "";}
| '('
{
$$ = $1;
expr_FuncArgList();
result.m_isFunc = true;
}
;
special_cast : LE_DYNAMIC_CAST {$$ = $1;}
| LE_STATIC_CAST {$$ = $1;}
| LE_CONST_CAST {$$ = $1;}
| LE_REINTERPRET_CAST {$$ = $1;}
;
amp_item : /*empty*/ {$$ = ""; }
| '&' { $$ = $1; }
;
star_list : /*empty*/ {$$ = ""; }
| star_list '*' {$$ = $1 + $2;}
;
special_star_amp : star_list amp_item { $$ = $1 + $2; }
;
stmnt_starter : /*empty*/ {$$ = "";}
| ';' { $$ = ";";}
| ':' { $$ = ":";} //e.g. private: std::string m_name;
;
cast_type: nested_scope_specifier LE_IDENTIFIER '<' parameter_list '>' special_star_amp
{
$$ = $1 + $2;
$1.erase($1.find_last_not_of(":")+1);
result.m_scope = $1;
result.m_name = $2;
result.m_isPtr = ($6.find("*") != (size_t)-1);;
result.m_isTemplate = true;
result.m_templateInitList = $3 + $4 + $5;
}
| nested_scope_specifier LE_IDENTIFIER special_star_amp
{
$$ = $1 + $2;
$1.erase($1.find_last_not_of(":")+1);
result.m_scope = $1;
result.m_name = $2;
result.m_isPtr = ($3.find("*") != (size_t)-1);;
}
;
nested_scope_specifier : /*empty*/ {$$ = "";}
| nested_scope_specifier scope_specifier { $$ = $1 + $2;}
;
scope_specifier : LE_IDENTIFIER LE_CLCL {$$ = $1+ $2;}
;
array_brackets : /* empty */ { $$ = ""; }
| '[' { expr_consumBracketsContent('['); $$ = "[]";}
;
%%
void yyerror(char *s) {}
void expr_consumBracketsContent(char openBrace)
{
char closeBrace;
switch(openBrace) {
case '(': closeBrace = ')'; break;
case '[': closeBrace = ']'; break;
case '<': closeBrace = '>'; break;
case '{': closeBrace = '}'; break;
default:
openBrace = '(';
closeBrace = ')';
break;
}
int depth = 1;
while(depth > 0)
{
int ch = cl_expr_lex();
//printf("ch=%d\n", ch);
//fflush(stdout);
if(ch == 0){
break;
}
if(ch == closeBrace)
{
depth--;
continue;
}
else if(ch == openBrace)
{
depth ++ ;
continue;
}
}
}
void expr_FuncArgList()
{
int depth = 1;
while(depth > 0)
{
int ch = cl_expr_lex();
//printf("ch=%d\n", ch);
//fflush(stdout);
if(ch ==0){
break;
}
if(ch == ')')
{
depth--;
continue;
}
else if(ch == '(')
{
depth ++ ;
continue;
}
}
}
void expr_consumeTemplateDecl()
{
int depth = 1;
while(depth > 0)
{
int ch = cl_expr_lex();
//printf("ch=%d\n", ch);
fflush(stdout);
if(ch ==0){
break;
}
if(ch == '>')
{
depth--;
continue;
}
else if(ch == '<')
{
depth ++ ;
continue;
}
}
}
void expr_syncParser(){
//dont do anything, a hook to allow us to implement some
//nice error recovery if needed
}
// return the scope name at the end of the input string
ExpressionResult &parse_expression(const std::string &in)
{
result.Reset();
//provide the lexer with new input
if( !setExprLexerInput(in) ){
return result;
}
//printf("parsing...\n");
cl_expr_parse();
//do the lexer cleanup
cl_expr_lex_clean();
return result;
}
|