using namespace ProgramSyntax;
+ProgramParser::Operator ProgramParser::operators[] =
+{
+ { "[", 2, BINARY, LEFT_TO_RIGHT },
+ { "(", 2, BINARY, LEFT_TO_RIGHT },
+ { ".", 2, BINARY, LEFT_TO_RIGHT },
+ { "++", 2, POSTFIX, LEFT_TO_RIGHT },
+ { "--", 2, POSTFIX, LEFT_TO_RIGHT },
+ { "++", 3, PREFIX, RIGHT_TO_LEFT },
+ { "--", 3, PREFIX, RIGHT_TO_LEFT },
+ { "+", 3, PREFIX, RIGHT_TO_LEFT },
+ { "-", 3, PREFIX, RIGHT_TO_LEFT },
+ { "~", 3, PREFIX, RIGHT_TO_LEFT },
+ { "!", 3, PREFIX, RIGHT_TO_LEFT },
+ { "*", 4, BINARY, LEFT_TO_RIGHT },
+ { "/", 4, BINARY, LEFT_TO_RIGHT },
+ { "%", 4, BINARY, LEFT_TO_RIGHT },
+ { "+", 5, BINARY, LEFT_TO_RIGHT },
+ { "-", 5, BINARY, LEFT_TO_RIGHT },
+ { "<<", 6, BINARY, LEFT_TO_RIGHT },
+ { ">>", 6, BINARY, LEFT_TO_RIGHT },
+ { "<", 7, BINARY, LEFT_TO_RIGHT },
+ { ">", 7, BINARY, LEFT_TO_RIGHT },
+ { "<=", 7, BINARY, LEFT_TO_RIGHT },
+ { ">=", 7, BINARY, LEFT_TO_RIGHT },
+ { "==", 8, BINARY, LEFT_TO_RIGHT },
+ { "!=", 8, BINARY, LEFT_TO_RIGHT },
+ { "&", 9, BINARY, LEFT_TO_RIGHT },
+ { "^", 10, BINARY, LEFT_TO_RIGHT },
+ { "|", 11, BINARY, LEFT_TO_RIGHT },
+ { "&&", 12, BINARY, LEFT_TO_RIGHT },
+ { "^^", 13, BINARY, LEFT_TO_RIGHT },
+ { "||", 14, BINARY, LEFT_TO_RIGHT },
+ { "?", 15, BINARY, RIGHT_TO_LEFT },
+ { ":", 15, BINARY, RIGHT_TO_LEFT },
+ { "=", 16, BINARY, RIGHT_TO_LEFT },
+ { "+=", 16, BINARY, RIGHT_TO_LEFT },
+ { "-=", 16, BINARY, RIGHT_TO_LEFT },
+ { "*=", 16, BINARY, RIGHT_TO_LEFT },
+ { "/=", 16, BINARY, RIGHT_TO_LEFT },
+ { "%=", 16, BINARY, RIGHT_TO_LEFT },
+ { "<<=", 16, BINARY, RIGHT_TO_LEFT },
+ { ">>=", 16, BINARY, RIGHT_TO_LEFT },
+ { "&=", 16, BINARY, RIGHT_TO_LEFT },
+ { "^=", 16, BINARY, RIGHT_TO_LEFT },
+ { "|=", 16, BINARY, RIGHT_TO_LEFT },
+ { ",", 17, BINARY, LEFT_TO_RIGHT },
+ { { 0 }, 18, NO_OPERATOR, LEFT_TO_RIGHT }
+};
+
+ProgramParser::ProgramParser():
+ module(0)
+{ }
+
+ProgramParser::~ProgramParser()
+{
+ delete module;
+}
+
Module &ProgramParser::parse(const string &s)
{
source = s;
- parse_source(main_module);
- return main_module;
+ parse_source();
+ return *module;
}
Module &ProgramParser::parse(IO::Base &io)
unsigned len = io.read(buffer, sizeof(buffer));
source.append(buffer, len);
}
- parse_source(main_module);
- return main_module;
+ parse_source();
+ return *module;
}
-void ProgramParser::parse_source(Module &module)
+void ProgramParser::parse_source()
{
- cur_module = &module;
+ delete module;
+ module = new Module;
+ cur_stage = &module->shared;
iter = source.begin();
- Context *cur_context = &module.global_context;
while(1)
{
- while(Node *statement = parse_global_declaration())
- cur_context->content.body.push_back(statement);
- cur_context->present = !cur_context->content.body.empty();
+ while(RefPtr<Node> statement = parse_global_declaration())
+ cur_stage->content.body.push_back(statement);
parse_token();
string token = parse_token();
if(token.empty())
break;
- else if(token=="global")
- cur_context = &module.global_context;
else if(token=="vertex")
- cur_context = &module.vertex_context;
+ module->stages.push_back(VERTEX);
else if(token=="geometry")
- cur_context = &module.geometry_context;
+ module->stages.push_back(GEOMETRY);
else if(token=="fragment")
- cur_context = &module.fragment_context;
+ module->stages.push_back(FRAGMENT);
else
- throw runtime_error(format("Parse error at '%s': expected context identifier", token));
+ throw runtime_error(format("Parse error at '%s': expected stage identifier", token));
+
+ if(cur_stage->type!=SHARED)
+ module->stages.back().previous = cur_stage;
+ cur_stage = &module->stages.back();
for(; (iter!=source.end() && *iter!='\n'); ++iter) ;
}
string ProgramParser::parse_other()
{
- string token;
- while(iter!=source.end())
+ if(iter==source.end())
+ return string();
+
+ string token(1, *iter++);
+ for(unsigned i=1; (i<3 && iter!=source.end()); ++i)
{
- if(isalnum(*iter) || *iter=='_' || isspace(*iter))
+ bool matched = false;
+ for(const Operator *j=operators; (!matched && j->type); ++j)
+ {
+ matched = (j->token[i]==*iter);
+ for(unsigned k=0; (matched && k<i && j->token[k]); ++k)
+ matched = (j->token[k]==token[k]);
+ }
+
+ if(!matched)
break;
+
token += *iter++;
- if(*iter==';' || *iter=='(' || *iter==')' || *iter=='[' || *iter==']')
- break;
}
return token;
unsigned slashes = 0;
while(iter!=source.end())
{
- //IO::print("%d '%c'\n", comment, *iter);
if(comment==0)
{
if(*iter=='/')
string ProgramParser::expect_identifier()
{
- static Regex re("^[a-zA-Z_][a-zA-Z0-9_]*$");
string token = parse_token();
- if(!re.match(token))
+ if(!is_identifier(token))
throw runtime_error(format("Parse error at '%s': expected an identifier", token));
return token;
}
bool ProgramParser::is_type(const string &token)
{
- return is_builtin_type(token) || cur_module->structs.count(token);
+ return is_builtin_type(token) || declared_types.count(token);
+}
+
+bool ProgramParser::is_identifier(const string &token)
+{
+ static Regex re("^[a-zA-Z_][a-zA-Z0-9_]*$");
+ return re.match(token);
}
-Node *ProgramParser::parse_global_declaration()
+RefPtr<Node> ProgramParser::parse_global_declaration()
{
string token = peek_token();
- if(token=="layout")
- return parse_layout();
+ if(token=="import")
+ return parse_import();
+ else if(token=="layout")
+ {
+ RefPtr<Layout> layout = parse_layout();
+ token = peek_token();
+ if(is_interface_qualifier(token) && peek_token(1)==";")
+ {
+ RefPtr<InterfaceLayout> iface_lo = new InterfaceLayout;
+ iface_lo->layout.qualifiers = layout->qualifiers;
+ iface_lo->interface = parse_token();
+ expect(";");
+ return iface_lo;
+ }
+ else
+ {
+ RefPtr<VariableDeclaration> var = parse_variable_declaration();
+ var->layout = layout;
+ return var;
+ }
+ }
else if(token=="struct")
return parse_struct_declaration();
else if(is_sampling_qualifier(token) || token=="const")
throw runtime_error(format("Syntax error at '%s': expected a global declaration", token));
}
-Node *ProgramParser::parse_statement()
+RefPtr<Node> ProgramParser::parse_statement()
{
string token = peek_token();
if(token=="if")
return parse_conditional();
else if(token=="for")
return parse_iteration();
+ else if(token=="passthrough")
+ return parse_passthrough();
else if(token=="return")
return parse_return();
else if(is_qualifier(token) || is_type(token))
else if(!token.empty())
{
RefPtr<ExpressionStatement> expr = new ExpressionStatement;
- parse_expression(expr->expression);
+ expr->expression = parse_expression();
expect(";");
- return expr.release();
+ return expr;
}
else
throw runtime_error(format("Syntax error at '%s': expected a statement", token));
}
-Layout *ProgramParser::parse_layout()
+RefPtr<Import> ProgramParser::parse_import()
+{
+ if(cur_stage->type!=SHARED)
+ throw runtime_error("Imports are only allowed in the shared section");
+
+ expect("import");
+ RefPtr<Import> import = new Import;
+ import->module = parse_token();
+ expect(";");
+ return import;
+}
+
+RefPtr<Layout> ProgramParser::parse_layout()
{
expect("layout");
expect("(");
expect(",");
}
expect(")");
- layout->interface = parse_token();
- expect(";");
- return layout.release();
+ return layout;
}
void ProgramParser::parse_block(Block &block, bool require_braces)
if(have_braces)
expect("{");
- while(1)
+ if(have_braces)
{
- string token = peek_token();
- if(token=="}")
- break;
-
- block.body.push_back(parse_statement());
- if(!have_braces)
- break;
+ while(peek_token()!="}")
+ block.body.push_back(parse_statement());
}
+ else
+ block.body.push_back(parse_statement());
block.use_braces = (require_braces || block.body.size()!=1);
expect("}");
}
-void ProgramParser::parse_expression(Expression &expr)
+RefPtr<Expression> ProgramParser::parse_expression(unsigned precedence)
{
- unsigned nesting_level = 0;
- while(iter!=source.end())
+ RefPtr<Expression> left;
+ VariableReference *left_var = 0;
+ while(1)
{
string token = peek_token();
- if(token=="(" || token=="[")
- ++nesting_level;
- else if(token==")" || token=="]")
+
+ const Operator *oper = 0;
+ for(Operator *i=operators; (!oper && i->type); ++i)
+ if(token==i->token && (!left || i->type!=PREFIX) && (left || i->type!=POSTFIX))
+ oper = i;
+
+ if(token==";" || token==")" || token=="]" || token=="," || (oper && precedence && oper->precedence>=precedence))
{
- if(!nesting_level)
- break;
- --nesting_level;
+ if(left)
+ return left;
+ else
+ throw runtime_error(format("Parse error at '%s': expected an expression", token));
}
- else if(token==";")
- break;
+ else if(left)
+ {
+ if(token=="(")
+ {
+ if(!left_var)
+ throw runtime_error(format("Parse error at '%s': function name must be an identifier", token));
+ left = parse_function_call(*left_var);
+ }
+ else if(token==".")
+ {
+ RefPtr<MemberAccess> memacc = new MemberAccess;
+ memacc->left = left;
+ parse_token();
+ memacc->member = expect_identifier();
+ left = memacc;
+ }
+ else if(oper && oper->type==POSTFIX)
+ {
+ RefPtr<UnaryExpression> unary = new UnaryExpression;
+ unary->oper = parse_token();
+ unary->prefix = false;
+ unary->expression = left;
+ left = unary;
+ }
+ else if(oper && oper->type==BINARY)
+ left = parse_binary(left, oper);
+ else
+ throw runtime_error(format("Parse error at '%s': expected an operator", token));
+ left_var = 0;
+ }
+ else
+ {
+ if(token=="(")
+ {
+ parse_token();
+ RefPtr<ParenthesizedExpression> parexpr = new ParenthesizedExpression;
+ parexpr->expression = parse_expression();
+ expect(")");
+ left = parexpr;
+ }
+ else if(isdigit(token[0]) || token=="true" || token=="false")
+ {
+ RefPtr<Literal> literal = new Literal;
+ literal->token = parse_token();
+ left = literal;
+ }
+ else if(is_identifier(token))
+ {
+ RefPtr<VariableReference> var = new VariableReference;
+ var->name = expect_identifier();
+ left = var;
+ left_var = var.get();
+ }
+ else if(oper && oper->type==PREFIX)
+ {
+ RefPtr<UnaryExpression> unary = new UnaryExpression;
+ unary->oper = parse_token();
+ unary->prefix = true;
+ unary->expression = parse_expression(oper->precedence);
+ left = unary;
+ }
+ else
+ throw runtime_error(format("Parse error at '%s': expected an expression", token));
+ }
+ }
+}
- parse_token();
- expr.tokens.push_back(token);
+RefPtr<BinaryExpression> ProgramParser::parse_binary(const RefPtr<Expression> &left, const Operator *oper)
+{
+ RefPtr<BinaryExpression> binary = (oper->precedence==16 ? new Assignment : new BinaryExpression);
+ binary->left = left;
+ binary->oper = parse_token();
+ if(binary->oper=="[")
+ {
+ binary->right = parse_expression();
+ expect("]");
+ binary->after = "]";
+ }
+ else
+ binary->right = parse_expression(oper->precedence+(oper->assoc==RIGHT_TO_LEFT));
+ return binary;
+}
+
+RefPtr<FunctionCall> ProgramParser::parse_function_call(const VariableReference &var)
+{
+ RefPtr<FunctionCall> call = new FunctionCall;
+ call->name = var.name;
+ call->constructor = is_type(call->name);
+ expect("(");
+ while(peek_token()!=")")
+ {
+ if(!call->arguments.empty())
+ expect(",");
+ call->arguments.push_back(parse_expression());
}
+ expect(")");
+ return call;
}
-StructDeclaration *ProgramParser::parse_struct_declaration()
+RefPtr<StructDeclaration> ProgramParser::parse_struct_declaration()
{
expect("struct");
RefPtr<StructDeclaration> strct = new StructDeclaration;
parse_block(strct->members, true);
expect(";");
- cur_module->structs[strct->name] = strct.get();
- return strct.release();
+ declared_types.insert(strct->name);
+ return strct;
}
-VariableDeclaration *ProgramParser::parse_variable_declaration()
+RefPtr<VariableDeclaration> ProgramParser::parse_variable_declaration()
{
RefPtr<VariableDeclaration> var = new VariableDeclaration;
var->array = true;
if(!check("]"))
{
- parse_expression(var->array_size);
+ var->array_size = parse_expression();
expect("]");
}
}
if(check("="))
- parse_expression(var->init_expression);
+ var->init_expression = parse_expression();
expect(";");
- return var.release();
+ return var;
}
-FunctionDeclaration *ProgramParser::parse_function_declaration()
+RefPtr<FunctionDeclaration> ProgramParser::parse_function_declaration()
{
RefPtr<FunctionDeclaration> func = new FunctionDeclaration;
func->return_type = expect_type();
func->name = expect_identifier();
- parse_function_parameter_list(*func);
+ expect("(");
+ while(peek_token()!=")")
+ {
+ if(!func->parameters.empty())
+ expect(",");
+
+ RefPtr<VariableDeclaration> var = new VariableDeclaration;
+ var->type = expect_type();
+ var->name = expect_identifier();
+ func->parameters.push_back(var);
+ }
+ expect(")");
string token = peek_token();
if(token=="{")
{
- func->definition = true;
+ func->definition = func.get();
parse_block(func->body, true);
}
else if(token==";")
else
throw runtime_error(format("Parse error at '%s': expected '{' or ';'", token));
- return func.release();
-}
-
-void ProgramParser::parse_function_parameter_list(FunctionDeclaration &func)
-{
- expect("(");
- while(1)
- {
- string token = peek_token();
- if(token==")")
- break;
- else if(!func.parameters.empty())
- expect(",");
-
- RefPtr<VariableDeclaration> var = new VariableDeclaration;
- var->type = expect_type();
- var->name = expect_identifier();
- func.parameters.push_back(var.release());
- }
- expect(")");
+ return func;
}
-InterfaceBlock *ProgramParser::parse_interface_block()
+RefPtr<InterfaceBlock> ProgramParser::parse_interface_block()
{
RefPtr<InterfaceBlock> iface = new InterfaceBlock;
iface->name = expect_identifier();
parse_block(iface->members, true);
- expect(";");
+ if(!check(";"))
+ {
+ iface->instance_name = expect_identifier();
+ if(check("["))
+ {
+ iface->array = true;
+ expect("]");
+ }
+ expect(";");
+ }
- return iface.release();
+ return iface;
}
-Conditional *ProgramParser::parse_conditional()
+RefPtr<Conditional> ProgramParser::parse_conditional()
{
expect("if");
expect("(");
RefPtr<Conditional> cond = new Conditional;
- parse_expression(cond->condition);
+ cond->condition = parse_expression();
expect(")");
parse_block(cond->body, false);
parse_block(cond->else_body, false);
}
- return cond.release();
+ return cond;
}
-Iteration *ProgramParser::parse_iteration()
+RefPtr<Iteration> ProgramParser::parse_iteration()
{
expect("for");
expect("(");
else
{
RefPtr<ExpressionStatement> expr = new ExpressionStatement;
- parse_expression(expr->expression);
+ expr->expression = parse_expression();
expect(";");
- loop->init_statement = expr.release();
+ loop->init_statement = expr;
}
- parse_expression(loop->condition);
+ loop->condition = parse_expression();
expect(";");
- parse_expression(loop->loop_expression);
+ loop->loop_expression = parse_expression();
expect(")");
parse_block(loop->body, false);
- return loop.release();
+ return loop;
+}
+
+RefPtr<Passthrough> ProgramParser::parse_passthrough()
+{
+ expect("passthrough");
+ RefPtr<Passthrough> pass = new Passthrough;
+ if(cur_stage->type==GEOMETRY)
+ {
+ expect("[");
+ pass->subscript = parse_expression();
+ expect("]");
+ }
+ expect(";");
+ return pass;
}
-Return *ProgramParser::parse_return()
+RefPtr<Return> ProgramParser::parse_return()
{
expect("return");
RefPtr<Return> ret = new Return;
- parse_expression(ret->expression);
+ if(peek_token()!=";")
+ ret->expression = parse_expression();
expect(";");
- return ret.release();
+ return ret;
}
} // namespace GL
projects / libs / gl.git / blobdiff