+++ /dev/null
-#include <msp/core/raii.h>
-#include <msp/strings/format.h>
-#include <msp/strings/regex.h>
-#include "programparser.h"
-
-#undef interface
-
-using namespace std;
-
-namespace Msp {
-namespace GL {
-
-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, const string &n, unsigned i)
-{
- source = s;
- source_name = n;
- source_index = i;
- parse_source();
- return *module;
-}
-
-Module &ProgramParser::parse(IO::Base &io, const string &n, unsigned i)
-{
- source = string();
- source_name = n;
- source_index = i;
- while(!io.eof())
- {
- char buffer[4096];
- unsigned len = io.read(buffer, sizeof(buffer));
- source.append(buffer, len);
- }
- parse_source();
- return *module;
-}
-
-void ProgramParser::parse_source()
-{
- while(1)
- {
- string::size_type slashes = source.find("//////");
- if(slashes==string::npos)
- break;
-
- string::size_type newline = source.find('\n', slashes);
- string pragma = format("#pragma MSP stage(%s)", source.substr(slashes+6, newline-slashes-6));
- source.replace(slashes, newline-slashes, pragma);
- }
-
- delete module;
- module = new Module;
- cur_stage = &module->shared;
- iter = source.begin();
- source_end = source.end();
- current_line = 1;
- allow_preprocess = true;
- while(RefPtr<Statement> statement = parse_global_declaration())
- cur_stage->content.body.push_back(statement);
-}
-
-string ProgramParser::format_error(const std::string &message)
-{
- string location = format("%s:%d: ", source_name, current_line);
- return location+message;
-}
-
-string ProgramParser::format_syntax_error(const std::string &expected)
-{
- return format_error(format("Syntax error at '%s': expected %s", last_token, expected));
-}
-
-const string &ProgramParser::peek_token(unsigned index)
-{
- while(next_tokens.size()<=index)
- next_tokens.push_back(parse_token_());
- return (last_token = next_tokens[index]);
-}
-
-const string &ProgramParser::parse_token()
-{
- if(!next_tokens.empty())
- {
- last_token = next_tokens.front();
- next_tokens.pop_front();
- return last_token;
- }
-
- return (last_token = parse_token_());
-}
-
-string ProgramParser::parse_token_()
-{
- while(1)
- {
- skip_comment_and_whitespace();
- if(iter==source_end)
- return string();
- else if(allow_preprocess && *iter=='#')
- {
- allow_preprocess = false;
- SetForScope<deque<string> > clear_tokens(next_tokens, deque<string>());
- preprocess();
- }
- else if(isalpha(*iter) || *iter=='_')
- return parse_identifier();
- else if(isdigit(*iter))
- return parse_number();
- else
- return parse_other();
- }
-}
-
-string ProgramParser::parse_identifier()
-{
- string ident;
- while(iter!=source_end)
- {
- if(isalnum(*iter) || *iter=='_')
- ident += *iter++;
- else
- break;
- }
-
- return ident;
-}
-
-string ProgramParser::parse_number()
-{
- bool accept_sign = false;
- string number;
- while(iter!=source_end)
- {
- if(isdigit(*iter) || *iter=='.')
- number += *iter++;
- else if(*iter=='e' || *iter=='E')
- {
- number += *iter++;
- accept_sign = true;
- }
- else if(accept_sign && (*iter=='+' || *iter=='-'))
- number += *iter++;
- else
- break;
- }
-
- return number;
-}
-
-string ProgramParser::parse_other()
-{
- if(iter==source_end)
- return string();
-
- string token(1, *iter++);
- for(unsigned i=1; (i<3 && iter!=source_end); ++i)
- {
- 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++;
- }
-
- return token;
-}
-
-void ProgramParser::skip_comment_and_whitespace()
-{
- unsigned comment = 0;
- while(iter!=source_end)
- {
- if(comment==0)
- {
- if(*iter=='/')
- comment = 1;
- else if(!isspace(*iter))
- break;
- }
- else if(comment==1)
- {
- if(*iter=='/')
- comment = 2;
- else if(*iter=='*')
- comment = 3;
- else
- {
- comment = 0;
- --iter;
- break;
- }
- }
- else if(comment==2)
- {
- if(*iter=='\n')
- comment = 0;
- }
- else if(comment==3 && *iter=='*')
- comment = 4;
- else if(comment==4)
- {
- if(*iter=='/')
- comment = 0;
- else if(*iter!='*')
- comment = 3;
- }
-
- if(*iter=='\n')
- {
- ++current_line;
- allow_preprocess = (comment<3);
- }
-
- ++iter;
- }
-}
-
-void ProgramParser::expect(const string &token)
-{
- string parsed = parse_token();
- if(parsed!=token)
- throw runtime_error(format_syntax_error(format("'%s'", token)));
-}
-
-string ProgramParser::expect_type()
-{
- string token = parse_token();
- if(!is_type(token))
- throw runtime_error(format_syntax_error("a type"));
- return token;
-}
-
-string ProgramParser::expect_identifier()
-{
- string token = parse_token();
- if(!is_identifier(token))
- throw runtime_error(format_syntax_error("an identifier"));
- return token;
-}
-
-bool ProgramParser::check(const string &token)
-{
- bool result = (peek_token()==token);
- if(result)
- parse_token();
- return result;
-}
-
-bool ProgramParser::is_interface_qualifier(const string &token)
-{
- return (token=="uniform" || token=="in" || token=="out");
-}
-
-bool ProgramParser::is_sampling_qualifier(const string &token)
-{
- return (token=="centroid" || token=="sample");
-}
-
-bool ProgramParser::is_interpolation_qualifier(const string &token)
-{
- return (token=="smooth" || token=="flat" || token=="noperspective");
-}
-
-bool ProgramParser::is_precision_qualifier(const string &token)
-{
- return (token=="highp" || token=="mediump" || token=="lowp");
-}
-
-bool ProgramParser::is_qualifier(const string &token)
-{
- return (token=="const" ||
- is_interface_qualifier(token) ||
- is_sampling_qualifier(token) ||
- is_interpolation_qualifier(token) ||
- is_precision_qualifier(token));
-}
-
-bool ProgramParser::is_builtin_type(const string &token)
-{
- static Regex re("^(void|float|int|bool|[ib]?vec[234]|mat[234](x[234])?|sampler((1D|2D)(Array)?(Shadow)?|Cube(Shadow)?|3D))$");
- return re.match(token);
-}
-
-bool ProgramParser::is_type(const string &token)
-{
- return is_builtin_type(token) || declared_types.count(token);
-}
-
-bool ProgramParser::is_identifier(const string &token)
-{
- static Regex re("^[a-zA-Z_][a-zA-Z0-9_]*$");
- return re.match(token);
-}
-
-void ProgramParser::preprocess()
-{
- expect("#");
-
- string::const_iterator line_end = iter;
- for(; (line_end!=source_end && *line_end!='\n'); ++line_end) ;
- SetForScope<string::const_iterator> stop_at_line_end(source_end, line_end);
-
- string token = peek_token();
- if(token=="pragma")
- preprocess_pragma();
- else if(token=="version")
- preprocess_version();
- else if(token=="define" || token=="undef" || token=="if" || token=="ifdef" || token=="ifndef" || token=="else" ||
- token=="elif" || token=="endif" || token=="error" || token=="extension" || token=="line")
- throw runtime_error(format_error(format("Unsupported preprocessor directive '%s'", token)));
- else if(!token.empty())
- throw runtime_error(format_syntax_error("a preprocessor directive"));
-
- iter = line_end;
-}
-
-void ProgramParser::preprocess_version()
-{
- expect("version");
- string token = parse_token();
- unsigned version = lexical_cast<unsigned>(token);
- cur_stage->required_version = Version(version/100, version%100);
-
- token = parse_token();
- if(!token.empty())
- throw runtime_error(format_syntax_error("end of line"));
-}
-
-void ProgramParser::preprocess_pragma()
-{
- expect("pragma");
- string token = parse_token();
- if(token=="MSP")
- preprocess_pragma_msp();
-}
-
-void ProgramParser::preprocess_pragma_msp()
-{
- string token = peek_token();
- if(token=="stage")
- preprocess_stage();
- else
- throw runtime_error(format_error(format("Unrecognized MSP pragma '%s'", token)));
-
- token = parse_token();
- if(!token.empty())
- throw runtime_error(format_syntax_error("end of line"));
-}
-
-void ProgramParser::preprocess_stage()
-{
- if(!allow_stage_change)
- throw runtime_error(format_error("Changing stage not allowed here"));
-
- expect("stage");
- expect("(");
- string token = expect_identifier();
- StageType stage = SHARED;
- if(token=="vertex")
- stage = VERTEX;
- else if(token=="geometry")
- stage = GEOMETRY;
- else if(token=="fragment")
- stage = FRAGMENT;
- else
- throw runtime_error(format_syntax_error("stage identifier"));
- expect(")");
-
- if(stage<=cur_stage->type)
- throw runtime_error(format_error(format("Stage '%s' not allowed here", token)));
-
- module->stages.push_back(stage);
-
- if(cur_stage->type!=SHARED)
- module->stages.back().previous = cur_stage;
- cur_stage = &module->stages.back();
-}
-
-RefPtr<Statement> ProgramParser::parse_global_declaration()
-{
- allow_stage_change = true;
- string token = peek_token();
- allow_stage_change = false;
-
- if(token=="import")
- return parse_import();
- else if(token=="precision")
- return parse_precision();
- 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->source = source_index;
- iface_lo->line = current_line;
- 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_interface_qualifier(token))
- {
- string next = peek_token(1);
- if(is_type(next) || is_qualifier(next))
- return parse_variable_declaration();
- else
- return parse_interface_block();
- }
- else if(is_qualifier(token))
- return parse_variable_declaration();
- else if(is_type(token))
- {
- if(peek_token(2)=="(")
- return parse_function_declaration();
- else
- return parse_variable_declaration();
- }
- else if(token.empty())
- return 0;
- else
- throw runtime_error(format_syntax_error("a global declaration"));
-}
-
-RefPtr<Statement> ProgramParser::parse_statement()
-{
- string token = peek_token();
- if(token=="if")
- return parse_conditional();
- else if(token=="for")
- return parse_for();
- else if(token=="while")
- return parse_while();
- else if(token=="passthrough")
- return parse_passthrough();
- else if(token=="return")
- return parse_return();
- else if(token=="break" || token=="continue" || token=="discard")
- {
- RefPtr<Jump> jump = new Jump;
- jump->source = source_index;
- jump->line = current_line;
- jump->keyword = parse_token();
- expect(";");
-
- return jump;
- }
- else if(is_qualifier(token) || is_type(token))
- return parse_variable_declaration();
- else if(!token.empty())
- {
- RefPtr<ExpressionStatement> expr = new ExpressionStatement;
- expr->source = source_index;
- expr->line = current_line;
- expr->expression = parse_expression();
- expect(";");
-
- return expr;
- }
- else
- throw runtime_error(format_syntax_error("a statement"));
-}
-
-RefPtr<Import> ProgramParser::parse_import()
-{
- if(cur_stage->type!=SHARED)
- throw runtime_error(format_error("Imports are only allowed in the shared section"));
-
- expect("import");
- RefPtr<Import> import = new Import;
- import->source = source_index;
- import->line = current_line;
- import->module = expect_identifier();
- expect(";");
- return import;
-}
-
-RefPtr<Precision> ProgramParser::parse_precision()
-{
- expect("precision");
- RefPtr<Precision> precision = new Precision;
- precision->source = source_index;
- precision->line = current_line;
-
- precision->precision = parse_token();
- if(!is_precision_qualifier(precision->precision))
- throw runtime_error(format_syntax_error("a precision qualifier"));
-
- precision->type = parse_token();
- // Not entirely accurate; only float, int and sampler types are allowed
- if(!is_builtin_type(precision->type))
- throw runtime_error(format_syntax_error("a builtin type"));
-
- expect(";");
-
- return precision;
-}
-
-RefPtr<Layout> ProgramParser::parse_layout()
-{
- expect("layout");
- expect("(");
- RefPtr<Layout> layout = new Layout;
- while(1)
- {
- string token = parse_token();
- if(token==")")
- throw runtime_error(format_syntax_error("a layout qualifier name"));
-
- layout->qualifiers.push_back(Layout::Qualifier());
- Layout::Qualifier &qual = layout->qualifiers.back();
- qual.identifier = token;
-
- if(check("="))
- qual.value = parse_token();
-
- if(peek_token()==")")
- break;
-
- expect(",");
- }
- expect(")");
-
- return layout;
-}
-
-void ProgramParser::parse_block(Block &block, bool require_braces)
-{
- bool have_braces = (require_braces || peek_token()=="{");
- if(have_braces)
- expect("{");
-
- if(have_braces)
- {
- 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);
-
- if(have_braces)
- expect("}");
-}
-
-RefPtr<Expression> ProgramParser::parse_expression(unsigned precedence)
-{
- RefPtr<Expression> left;
- VariableReference *left_var = 0;
- while(1)
- {
- string token = peek_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(left)
- return left;
- else
- throw runtime_error(format_syntax_error("an expression"));
- }
- else if(left)
- {
- if(token=="(")
- {
- if(!left_var)
- throw runtime_error(format_error("Syntax error before '(': function name must be an identifier"));
- 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_syntax_error("an operator"));
- 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_syntax_error("an expression"));
- }
- }
-}
-
-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;
-}
-
-RefPtr<StructDeclaration> ProgramParser::parse_struct_declaration()
-{
- expect("struct");
- RefPtr<StructDeclaration> strct = new StructDeclaration;
- strct->source = source_index;
- strct->line = current_line;
-
- strct->name = expect_identifier();
- parse_block(strct->members, true);
- expect(";");
-
- declared_types.insert(strct->name);
- return strct;
-}
-
-RefPtr<VariableDeclaration> ProgramParser::parse_variable_declaration()
-{
- RefPtr<VariableDeclaration> var = new VariableDeclaration;
- var->source = source_index;
- var->line = current_line;
-
- string token = peek_token();
- while(is_qualifier(token))
- {
- parse_token();
- if(is_interface_qualifier(token))
- var->interface = token;
- else if(is_sampling_qualifier(token))
- var->sampling = token;
- else if(is_interpolation_qualifier(token))
- var->interpolation = token;
- else if(is_precision_qualifier(token))
- var->precision = token;
- else if(token=="const")
- var->constant = true;
- token = peek_token();
- }
-
- var->type = expect_type();
- var->name = expect_identifier();
-
- if(check("["))
- {
- var->array = true;
- if(!check("]"))
- {
- var->array_size = parse_expression();
- expect("]");
- }
- }
-
- if(check("="))
- var->init_expression = parse_expression();
-
- expect(";");
- return var;
-}
-
-RefPtr<FunctionDeclaration> ProgramParser::parse_function_declaration()
-{
- RefPtr<FunctionDeclaration> func = new FunctionDeclaration;
- func->source = source_index;
- func->line = current_line;
-
- func->return_type = expect_type();
- func->name = expect_identifier();
- expect("(");
- while(peek_token()!=")")
- {
- if(!func->parameters.empty())
- expect(",");
-
- RefPtr<VariableDeclaration> var = new VariableDeclaration;
- string token = peek_token();
- if(token=="in" || token=="out" || token=="inout")
- var->interface = parse_token();
- var->type = expect_type();
- var->name = expect_identifier();
- func->parameters.push_back(var);
- }
- expect(")");
-
- string token = peek_token();
- if(token=="{")
- {
- func->definition = func.get();
- parse_block(func->body, true);
- }
- else if(token==";")
- parse_token();
- else
- throw runtime_error(format_syntax_error("'{' or ';'"));
-
- return func;
-}
-
-RefPtr<InterfaceBlock> ProgramParser::parse_interface_block()
-{
- RefPtr<InterfaceBlock> iface = new InterfaceBlock;
- iface->source = source_index;
- iface->line = current_line;
-
- iface->interface = parse_token();
- if(!is_interface_qualifier(iface->interface))
- throw runtime_error(format_syntax_error("an interface qualifier"));
-
- iface->name = expect_identifier();
- parse_block(iface->members, true);
- if(!check(";"))
- {
- iface->instance_name = expect_identifier();
- if(check("["))
- {
- iface->array = true;
- expect("]");
- }
- expect(";");
- }
-
- return iface;
-}
-
-RefPtr<Conditional> ProgramParser::parse_conditional()
-{
- expect("if");
- RefPtr<Conditional> cond = new Conditional;
- cond->source = source_index;
- cond->line = current_line;
- expect("(");
- cond->condition = parse_expression();
- expect(")");
-
- parse_block(cond->body, false);
-
- string token = peek_token();
- if(token=="else")
- {
- parse_token();
- parse_block(cond->else_body, false);
- }
-
- return cond;
-}
-
-RefPtr<Iteration> ProgramParser::parse_for()
-{
- expect("for");
- RefPtr<Iteration> loop = new Iteration;
- loop->source = source_index;
- loop->line = current_line;
- expect("(");
- string token = peek_token();
- if(is_type(token))
- loop->init_statement = parse_statement();
- else
- {
- if(token!=";")
- {
- RefPtr<ExpressionStatement> expr = new ExpressionStatement;
- expr->expression = parse_expression();
- loop->init_statement = expr;
- }
- expect(";");
- }
- if(peek_token()!=";")
- loop->condition = parse_expression();
- expect(";");
- if(peek_token()!=")")
- loop->loop_expression = parse_expression();
- expect(")");
-
- parse_block(loop->body, false);
-
- return loop;
-}
-
-RefPtr<Iteration> ProgramParser::parse_while()
-{
- expect("while");
- RefPtr<Iteration> loop = new Iteration;
- loop->source = source_index;
- loop->line = current_line;
- expect("(");
- loop->condition = parse_expression();
- expect(")");
-
- parse_block(loop->body, false);
-
- return loop;
-}
-
-RefPtr<Passthrough> ProgramParser::parse_passthrough()
-{
- expect("passthrough");
- RefPtr<Passthrough> pass = new Passthrough;
- pass->source = source_index;
- pass->line = current_line;
- if(cur_stage->type==GEOMETRY)
- {
- expect("[");
- pass->subscript = parse_expression();
- expect("]");
- }
- expect(";");
- return pass;
-}
-
-RefPtr<Return> ProgramParser::parse_return()
-{
- expect("return");
- RefPtr<Return> ret = new Return;
- ret->source = source_index;
- ret->line = current_line;
- if(peek_token()!=";")
- ret->expression = parse_expression();
- expect(";");
- return ret;
-}
-
-} // namespace GL
-} // namespace Msp
projects / libs / gl.git / blobdiff