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#include <common.hpp>
#include "../parse/common.hpp"
#include "../parse/parseerror.hpp"
#include "../macros.hpp"
MacroRules Parse_MacroRules(TokenStream& lex);
::std::vector<MacroPatEnt> Parse_MacroRules_Pat(TokenStream& lex, bool allow_sub, enum eTokenType open, enum eTokenType close)
{
TRACE_FUNCTION;
Token tok;
::std::vector<MacroPatEnt> ret;
int depth = 0;
while( GET_TOK(tok, lex) != close || depth > 0 )
{
if( tok.type() == open )
{
depth ++;
}
else if( tok.type() == close )
{
if(depth == 0)
throw ParseError::Generic(FMT("Unmatched " << Token(close) << " in macro pattern"));
depth --;
}
switch(tok.type())
{
case TOK_DOLLAR:
switch( GET_TOK(tok, lex) )
{
case TOK_IDENT: {
::std::string name = tok.str();
GET_CHECK_TOK(tok, lex, TOK_COLON);
GET_CHECK_TOK(tok, lex, TOK_IDENT);
::std::string type = tok.str();
if(0)
;
else if( type == "tt" )
ret.push_back( MacroPatEnt(name, MacroPatEnt::PAT_TT) );
else if( type == "pat" )
ret.push_back( MacroPatEnt(name, MacroPatEnt::PAT_PAT) );
else if( type == "ident" )
ret.push_back( MacroPatEnt(name, MacroPatEnt::PAT_IDENT) );
else if( type == "path" )
ret.push_back( MacroPatEnt(name, MacroPatEnt::PAT_PATH) );
else if( type == "expr" )
ret.push_back( MacroPatEnt(name, MacroPatEnt::PAT_EXPR) );
else if( type == "ty" )
ret.push_back( MacroPatEnt(name, MacroPatEnt::PAT_TYPE) );
else if( type == "meta" )
ret.push_back( MacroPatEnt(name, MacroPatEnt::PAT_META) );
else if( type == "block" )
ret.push_back( MacroPatEnt(name, MacroPatEnt::PAT_BLOCK) );
else
throw ParseError::Generic(lex, FMT("Unknown fragment type '" << type << "'"));
break; }
case TOK_PAREN_OPEN:
if( allow_sub )
{
auto subpat = Parse_MacroRules_Pat(lex, true, TOK_PAREN_OPEN, TOK_PAREN_CLOSE);
enum eTokenType joiner = TOK_NULL;
GET_TOK(tok, lex);
if( tok.type() != TOK_PLUS && tok.type() != TOK_STAR )
{
DEBUG("Joiner = " << tok);
joiner = tok.type();
GET_TOK(tok, lex);
}
DEBUG("tok = " << tok);
switch(tok.type())
{
case TOK_PLUS:
DEBUG("$()+ " << subpat);
ret.push_back( MacroPatEnt(Token(joiner), true, ::std::move(subpat)) );
break;
case TOK_STAR:
DEBUG("$()* " << subpat);
ret.push_back( MacroPatEnt(Token(joiner), false, ::std::move(subpat)) );
break;
default:
throw ParseError::Unexpected(lex, tok);
}
}
else
{
throw ParseError::Generic(lex, FMT("Nested repetitions in macro"));
}
break;
default:
throw ParseError::Unexpected(lex, tok);
}
break;
case TOK_EOF:
throw ParseError::Unexpected(lex, tok);
default:
ret.push_back( MacroPatEnt(tok) );
break;
}
}
return ret;
}
::std::vector<MacroRuleEnt> Parse_MacroRules_Cont(TokenStream& lex, bool allow_sub, enum eTokenType open, enum eTokenType close)
{
TRACE_FUNCTION;
Token tok;
::std::vector<MacroRuleEnt> ret;
int depth = 0;
while( GET_TOK(tok, lex) != close || depth > 0 )
{
if( tok.type() == TOK_EOF ) {
throw ParseError::Unexpected(lex, tok);
}
if( tok.type() == TOK_NULL ) continue ;
if( tok.type() == open )
{
DEBUG("depth++");
depth ++;
}
else if( tok.type() == close )
{
DEBUG("depth--");
if(depth == 0)
throw ParseError::Generic(FMT("Unmatched " << Token(close) << " in macro content"));
depth --;
}
if( tok.type() == TOK_DOLLAR )
{
GET_TOK(tok, lex);
if( tok.type() == TOK_PAREN_OPEN )
{
if( !allow_sub )
throw ParseError::Unexpected(lex, tok);
auto content = Parse_MacroRules_Cont(lex, true, TOK_PAREN_OPEN, TOK_PAREN_CLOSE);
GET_TOK(tok, lex);
enum eTokenType joiner = TOK_NULL;
if( tok.type() != TOK_PLUS && tok.type() != TOK_STAR )
{
joiner = tok.type();
GET_TOK(tok, lex);
}
DEBUG("joiner = " << Token(joiner) << ", content = " << content);
switch(tok.type())
{
case TOK_STAR:
ret.push_back( MacroRuleEnt(joiner, ::std::move(content)) );
break;
case TOK_PLUS:
// TODO: Ensure that the plusses match
ret.push_back( MacroRuleEnt(joiner, ::std::move(content)) );
break;
default:
throw ParseError::Unexpected(lex, tok);
}
}
else if( tok.type() == TOK_IDENT )
{
ret.push_back( MacroRuleEnt(tok.str()) );
}
else if( tok.type() == TOK_RWORD_CRATE )
{
ret.push_back( MacroRuleEnt("*crate") );
}
else
{
throw ParseError::Unexpected(lex, tok);
}
}
else
{
ret.push_back( MacroRuleEnt(tok) );
}
}
return ret;
}
MacroRule Parse_MacroRules_Var(TokenStream& lex)
{
TRACE_FUNCTION;
Token tok;
MacroRule rule;
// Pattern
enum eTokenType close;
switch(GET_TOK(tok, lex))
{
case TOK_BRACE_OPEN: close = TOK_BRACE_CLOSE; break;
case TOK_PAREN_OPEN: close = TOK_PAREN_CLOSE; break;
default:
throw ParseError::Unexpected(lex, tok);
}
// - Pattern entries
rule.m_pattern = Parse_MacroRules_Pat(lex, true, tok.type(), close);
GET_CHECK_TOK(tok, lex, TOK_FATARROW);
// Replacement
switch(GET_TOK(tok, lex))
{
case TOK_BRACE_OPEN: close = TOK_BRACE_CLOSE; break;
case TOK_PAREN_OPEN: close = TOK_PAREN_CLOSE; break;
default:
throw ParseError::Unexpected(lex, tok);
}
rule.m_contents = Parse_MacroRules_Cont(lex, true, tok.type(), close);
DEBUG("Rule - ["<<rule.m_pattern<<"] => "<<rule.m_contents<<"");
return rule;
}
MacroRules Parse_MacroRules(TokenStream& lex)
{
TRACE_FUNCTION_F("");
Token tok;
::std::vector<MacroRule> rules;
while( GET_TOK(tok, lex) != TOK_EOF )
{
lex.putback(tok);
rules.push_back( Parse_MacroRules_Var(lex) );
if(GET_TOK(tok, lex) != TOK_SEMICOLON) {
CHECK_TOK(tok, TOK_EOF);
break;
}
}
return MacroRules( mv$(rules) );
}
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