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#include "CxxTemplateFunction.h"
#include "CxxScannerTokens.h"
#include <set>
CxxTemplateFunction::CxxTemplateFunction(TagEntryPtr tag)
{
m_scanner = ::LexerNew(tag->GetPatternClean(), kLexerOpt_None);
m_sigScanner = ::LexerNew(tag->GetSignature(), kLexerOpt_None);
}
CxxTemplateFunction::~CxxTemplateFunction()
{
if(m_scanner) {
::LexerDestroy(&m_scanner);
}
if(m_sigScanner) {
::LexerDestroy(&m_sigScanner);
}
}
void CxxTemplateFunction::ParseDefinitionList()
{
m_list.Clear();
int depth(0);
CxxLexerToken token;
// scan until we find 'template' keyword
while(::LexerNext(m_scanner, token)) {
if(token.GetType() == T_TEMPLATE) {
break;
}
}
if(!token.GetType()) return; // EOF
// Loop until we found the open brace '<'
while(::LexerNext(m_scanner, token)) {
if(token.GetType() == '<') {
++depth;
break;
}
}
// could not find it
if(!depth) return;
bool cont = true;
wxString currentToken;
while(cont && ::LexerNext(m_scanner, token)) {
switch(token.GetType()) {
case T_TYPENAME:
case T_CLASS:
// ignore these keywords
break;
case ',':
if(!currentToken.IsEmpty()) {
m_list.Add(currentToken.Trim().Trim(false));
currentToken.Clear();
}
break;
case '>':
--depth;
if(depth == 0) {
// done
if(!currentToken.IsEmpty()) {
m_list.Add(currentToken.Trim().Trim(false));
currentToken.Clear();
}
cont = false;
} else {
currentToken << token.GetWXString() << " ";
}
break;
case '<':
++depth;
currentToken << token.GetWXString() << " ";
break;
default:
currentToken << token.GetWXString() << " ";
break;
}
}
}
bool CxxTemplateFunction::CanTemplateArgsDeduced()
{
ParseDefinitionList(); // Initializes the m_list array
std::set<wxString> words;
CxxLexerToken token;
// Collect all the identifiers and keep them inside a set
while(::LexerNext(m_sigScanner, token)) {
if(token.GetType() == T_IDENTIFIER) {
words.insert(token.GetWXString());
}
}
// Loop over the function arguments list and check that all of them
// exists in the set we created from the function signature
for(size_t i=0; i<m_list.GetCount(); ++i) {
if(words.count(m_list.Item(i)) == 0) {
// this template argument could not be found in the function signature...
return false;
}
}
return true;
}
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