Added eval
This commit is contained in:
Jonathan Turner
3
samples/eval.wes
Normal file
3
samples/eval.wes
Normal file
@@ -0,0 +1,3 @@
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var i = 1
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var j = eval("i + 4")
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print(j)
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265
wesley/main.cpp
265
wesley/main.cpp
@@ -44,6 +44,7 @@ struct EvalError {
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};
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Boxed_Value eval_token(BoxedCPP_System &ss, TokenPtr node);
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Boxed_Value evaluate_string(Lexer &lexer, Rule &parser, BoxedCPP_System &ss, const std::string &input, const char *filename);
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void debug_print(TokenPtr token, std::string prepend) {
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std::cout << prepend << "Token: " << token->text << "(" << tokentype_to_string(token->identifier) << ") @ " << token->filename
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@@ -113,6 +114,125 @@ const Boxed_Value eval_function (BoxedCPP_System &ss, TokenPtr node, const std::
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return eval_token(ss, node);
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}
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Rule build_parser_rules() {
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Rule params;
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Rule block(TokenType::Scoped_Block);
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Rule fundef(TokenType::Function_Def);
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Rule statement;
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Rule return_statement(TokenType::Return);
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Rule equation(TokenType::Equation);
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Rule boolean(TokenType::Boolean);
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Rule comparison(TokenType::Comparison);
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Rule expression(TokenType::Expression);
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Rule term(TokenType::Term);
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Rule factor(TokenType::Factor);
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Rule negate(TokenType::Negate);
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Rule prefix(TokenType::Prefix);
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Rule funcall(TokenType::Fun_Call);
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Rule methodcall(TokenType::Method_Call);
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Rule if_block(TokenType::If_Block);
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Rule while_block(TokenType::While_Block);
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Rule for_block(TokenType::For_Block);
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Rule arraycall(TokenType::Array_Call);
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Rule vardecl(TokenType::Variable_Decl);
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Rule arrayinit(TokenType::Array_Init);
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Rule value;
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Rule statements;
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Rule for_conditions;
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Rule rule = *((fundef | statements) >> *(Ign(Id(TokenType::Semicolon))));
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statements = (statement >> *(Ign(Id(TokenType::Semicolon)) >> statement) >> *(Ign(Id(TokenType::Semicolon))));
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statement = if_block | while_block | for_block | equation;
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if_block = Ign(Str("if")) >> boolean >> block >> *(Str("elseif") >> boolean >> block) >> ~(Str("else") >> block);
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while_block = Ign(Str("while")) >> boolean >> block;
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for_block = Ign(Str("for")) >> for_conditions >> block;
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for_conditions = Ign(Id(TokenType::Parens_Open)) >> ~equation >> Ign(Str(";")) >> boolean >> Ign(Str(";")) >> equation >> Ign(Id(TokenType::Parens_Close));
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fundef = Ign(Str("def")) >> Id(TokenType::Identifier) >> ~(Ign(Id(TokenType::Parens_Open)) >> ~params >> Ign(Id(TokenType::Parens_Close))) >>
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block >> ~Ign(Id(TokenType::Semicolon));
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params = Id(TokenType::Identifier) >> *(Ign(Str(",")) >> Id(TokenType::Identifier));
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block = *(Ign(Id(TokenType::Semicolon))) >> Ign(Id(TokenType::Curly_Open)) >> *(Ign(Id(TokenType::Semicolon))) >> ~statements >> Ign(Id(TokenType::Curly_Close)) >> *(Ign(Id(TokenType::Semicolon)));
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equation = *(((vardecl | arraycall | Id(TokenType::Identifier)) >> Str("=")) |
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((vardecl | arraycall | Id(TokenType::Identifier)) >> Str("+=")) |
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((vardecl | arraycall | Id(TokenType::Identifier)) >> Str("-=")) |
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((vardecl | arraycall | Id(TokenType::Identifier)) >> Str("*=")) |
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((vardecl | arraycall | Id(TokenType::Identifier)) >> Str("/="))) >> boolean;
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boolean = comparison >> *((Str("&&") >> comparison) | (Str("||") >> comparison));
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comparison = expression >> *((Str("==") >> expression) | (Str("!=") >> expression) | (Str("<") >> expression) |
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(Str("<=") >> expression) |(Str(">") >> expression) | (Str(">=") >> expression));
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expression = term >> *((Str("+") >> term) | (Str("-") >> term));
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term = factor >> *((Str("*") >> factor) | (Str("/") >> factor));
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factor = methodcall | arraycall | value | negate | prefix | (Ign(Str("+")) >> value);
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funcall = Id(TokenType::Identifier) >> Ign(Id(TokenType::Parens_Open)) >> ~(boolean >> *(Ign(Str("," )) >> boolean)) >> Ign(Id(TokenType::Parens_Close));
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methodcall = value >> +(Ign(Str(".")) >> funcall);
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negate = Ign(Str("-")) >> boolean;
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prefix = (Str("++") >> (boolean | arraycall)) | (Str("--") >> (boolean | arraycall));
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return_statement = Ign(Str("return")) >> boolean;
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arraycall = value >> +((Ign(Id(TokenType::Square_Open)) >> boolean >> Ign(Id(TokenType::Square_Close))));
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value = vardecl | arrayinit | block | (Ign(Id(TokenType::Parens_Open)) >> boolean >> Ign(Id(TokenType::Parens_Close))) | return_statement |
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funcall | Id(TokenType::Identifier) | Id(TokenType::Real_Number) | Id(TokenType::Integer) | Id(TokenType::Quoted_String) |
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Id(TokenType::Single_Quoted_String) ;
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arrayinit = Ign(Id(TokenType::Square_Open)) >> ~(boolean >> *(Ign(Str(",")) >> boolean)) >> Ign(Id(TokenType::Square_Close));
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vardecl = Ign(Str("var")) >> Id(TokenType::Identifier);
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return rule;
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}
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Lexer build_lexer() {
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Lexer lexer;
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lexer.set_skip(Pattern("[ \\t]+", TokenType::Whitespace));
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lexer.set_line_sep(Pattern("\\n|\\r\\n", TokenType::Carriage_Return));
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lexer.set_command_sep(Pattern(";|\\r\\n|\\n", TokenType::Semicolon));
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lexer.set_multiline_comment(Pattern("/\\*", TokenType::Comment), Pattern("\\*/", TokenType::Comment));
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lexer.set_singleline_comment(Pattern("//", TokenType::Comment));
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lexer << Pattern("[A-Za-z_]+", TokenType::Identifier);
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lexer << Pattern("[0-9]+\\.[0-9]+", TokenType::Real_Number);
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lexer << Pattern("[0-9]+", TokenType::Integer);
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lexer << Pattern("[!@#$%^&*|\\-+=<>.]+|/[!@#$%^&|\\-+=<>]*", TokenType::Operator);
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lexer << Pattern("\\(", TokenType::Parens_Open);
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lexer << Pattern("\\)", TokenType::Parens_Close);
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lexer << Pattern("\\[", TokenType::Square_Open);
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lexer << Pattern("\\]", TokenType::Square_Close);
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lexer << Pattern("\\{", TokenType::Curly_Open);
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lexer << Pattern("\\}", TokenType::Curly_Close);
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lexer << Pattern(",", TokenType::Comma);
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lexer << Pattern("\"(?:[^\"\\\\]|\\\\.)*\"", TokenType::Quoted_String);
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lexer << Pattern("'(?:[^'\\\\]|\\\\.)*'", TokenType::Single_Quoted_String);
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return lexer;
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}
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BoxedCPP_System build_eval_system() {
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BoxedCPP_System ss;
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bootstrap(ss);
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bootstrap_vector<std::vector<int> >(ss, "VectorInt");
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bootstrap_vector<std::vector<Boxed_Value> >(ss, "Vector");
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// dump_system(ss);
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//Register a new function, this one with typing for us, so we don't have to ubox anything
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//right here
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register_function(ss, &print<bool>, "print");
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register_function(ss, &print<std::string>, "print");
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register_function(ss, &print<double>, "print");
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register_function(ss, &print<size_t>, "print");
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register_function(ss, &concat_string, "concat_string");
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register_function(ss, &print<int>, "print");
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ss.register_function(boost::function<void ()>(boost::bind(&dump_system, boost::ref(ss))), "dump_system");
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ss.register_function(boost::function<void (Boxed_Value)>(boost::bind(&dump_object, _1)), "dump_object");
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ss.register_function(boost::shared_ptr<Proxy_Function>(
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new Dynamic_Proxy_Function(boost::bind(&add_two, boost::ref(ss), _1), 2)), "add_two");
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return ss;
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}
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Boxed_Value eval_token(BoxedCPP_System &ss, TokenPtr node) {
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Boxed_Value retval;
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unsigned int i, j;
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@@ -256,15 +376,26 @@ Boxed_Value eval_token(BoxedCPP_System &ss, TokenPtr node) {
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}
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break;
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case (TokenType::Fun_Call) : {
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Param_List_Builder plb;
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for (i = 1; i < node->children.size(); ++i) {
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plb << eval_token(ss, node->children[i]);
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if (node->children[0]->text == "eval") {
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Lexer new_lexer = build_lexer();
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Rule new_parser = build_parser_rules();
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Boxed_Value arg = eval_token(ss, node->children[1]);
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std::string arg_string = Cast_Helper<std::string &>()(arg);
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retval = evaluate_string(new_lexer, new_parser, ss, arg_string, "__EVAL__");
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}
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try {
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retval = dispatch(ss.get_function(node->children[0]->text), plb);
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}
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catch(std::exception &e){
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throw EvalError("Can not find appropriate '" + node->children[0]->text + "'", node->children[0]);
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else {
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Param_List_Builder plb;
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for (i = 1; i < node->children.size(); ++i) {
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plb << eval_token(ss, node->children[i]);
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}
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try {
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retval = dispatch(ss.get_function(node->children[0]->text), plb);
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}
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catch(std::exception &e){
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throw EvalError("Can not find appropriate '" + node->children[0]->text + "'", node->children[0]);
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}
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}
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}
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break;
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@@ -427,124 +558,6 @@ Boxed_Value eval_token(BoxedCPP_System &ss, TokenPtr node) {
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return retval;
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}
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Rule build_parser_rules() {
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Rule params;
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Rule block(TokenType::Scoped_Block);
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Rule fundef(TokenType::Function_Def);
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Rule statement;
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Rule return_statement(TokenType::Return);
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Rule equation(TokenType::Equation);
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Rule boolean(TokenType::Boolean);
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Rule comparison(TokenType::Comparison);
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Rule expression(TokenType::Expression);
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Rule term(TokenType::Term);
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Rule factor(TokenType::Factor);
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Rule negate(TokenType::Negate);
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Rule prefix(TokenType::Prefix);
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Rule funcall(TokenType::Fun_Call);
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Rule methodcall(TokenType::Method_Call);
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Rule if_block(TokenType::If_Block);
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Rule while_block(TokenType::While_Block);
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Rule for_block(TokenType::For_Block);
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Rule arraycall(TokenType::Array_Call);
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Rule vardecl(TokenType::Variable_Decl);
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Rule arrayinit(TokenType::Array_Init);
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Rule value;
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Rule statements;
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Rule for_conditions;
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Rule rule = *((fundef | statements) >> *(Ign(Id(TokenType::Semicolon))));
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statements = (statement >> *(Ign(Id(TokenType::Semicolon)) >> statement) >> *(Ign(Id(TokenType::Semicolon))));
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statement = if_block | while_block | for_block | equation;
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if_block = Ign(Str("if")) >> boolean >> block >> *(Str("elseif") >> boolean >> block) >> ~(Str("else") >> block);
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while_block = Ign(Str("while")) >> boolean >> block;
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for_block = Ign(Str("for")) >> for_conditions >> block;
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for_conditions = Ign(Id(TokenType::Parens_Open)) >> ~equation >> Ign(Str(";")) >> boolean >> Ign(Str(";")) >> equation >> Ign(Id(TokenType::Parens_Close));
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fundef = Ign(Str("def")) >> Id(TokenType::Identifier) >> ~(Ign(Id(TokenType::Parens_Open)) >> ~params >> Ign(Id(TokenType::Parens_Close))) >>
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block >> ~Ign(Id(TokenType::Semicolon));
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params = Id(TokenType::Identifier) >> *(Ign(Str(",")) >> Id(TokenType::Identifier));
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block = *(Ign(Id(TokenType::Semicolon))) >> Ign(Id(TokenType::Curly_Open)) >> *(Ign(Id(TokenType::Semicolon))) >> ~statements >> Ign(Id(TokenType::Curly_Close)) >> *(Ign(Id(TokenType::Semicolon)));
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equation = *(((vardecl | arraycall | Id(TokenType::Identifier)) >> Str("=")) |
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((vardecl | arraycall | Id(TokenType::Identifier)) >> Str("+=")) |
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((vardecl | arraycall | Id(TokenType::Identifier)) >> Str("-=")) |
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((vardecl | arraycall | Id(TokenType::Identifier)) >> Str("*=")) |
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((vardecl | arraycall | Id(TokenType::Identifier)) >> Str("/="))) >> boolean;
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boolean = comparison >> *((Str("&&") >> comparison) | (Str("||") >> comparison));
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comparison = expression >> *((Str("==") >> expression) | (Str("!=") >> expression) | (Str("<") >> expression) |
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(Str("<=") >> expression) |(Str(">") >> expression) | (Str(">=") >> expression));
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expression = term >> *((Str("+") >> term) | (Str("-") >> term));
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term = factor >> *((Str("*") >> factor) | (Str("/") >> factor));
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factor = methodcall | arraycall | value | negate | prefix | (Ign(Str("+")) >> value);
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funcall = Id(TokenType::Identifier) >> Ign(Id(TokenType::Parens_Open)) >> ~(boolean >> *(Ign(Str("," )) >> boolean)) >> Ign(Id(TokenType::Parens_Close));
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methodcall = value >> +(Ign(Str(".")) >> funcall);
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negate = Ign(Str("-")) >> boolean;
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prefix = (Str("++") >> (boolean | arraycall)) | (Str("--") >> (boolean | arraycall));
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return_statement = Ign(Str("return")) >> boolean;
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arraycall = value >> +((Ign(Id(TokenType::Square_Open)) >> boolean >> Ign(Id(TokenType::Square_Close))));
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value = vardecl | arrayinit | block | (Ign(Id(TokenType::Parens_Open)) >> boolean >> Ign(Id(TokenType::Parens_Close))) | return_statement |
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funcall | Id(TokenType::Identifier) | Id(TokenType::Real_Number) | Id(TokenType::Integer) | Id(TokenType::Quoted_String) |
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Id(TokenType::Single_Quoted_String) ;
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arrayinit = Ign(Id(TokenType::Square_Open)) >> ~(boolean >> *(Ign(Str(",")) >> boolean)) >> Ign(Id(TokenType::Square_Close));
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vardecl = Ign(Str("var")) >> Id(TokenType::Identifier);
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return rule;
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}
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Lexer build_lexer() {
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Lexer lexer;
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lexer.set_skip(Pattern("[ \\t]+", TokenType::Whitespace));
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lexer.set_line_sep(Pattern("\\n|\\r\\n", TokenType::Carriage_Return));
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lexer.set_command_sep(Pattern(";|\\r\\n|\\n", TokenType::Semicolon));
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lexer.set_multiline_comment(Pattern("/\\*", TokenType::Comment), Pattern("\\*/", TokenType::Comment));
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lexer.set_singleline_comment(Pattern("//", TokenType::Comment));
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lexer << Pattern("[A-Za-z_]+", TokenType::Identifier);
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lexer << Pattern("[0-9]+\\.[0-9]+", TokenType::Real_Number);
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lexer << Pattern("[0-9]+", TokenType::Integer);
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lexer << Pattern("[!@#$%^&*|\\-+=<>.]+|/[!@#$%^&|\\-+=<>]*", TokenType::Operator);
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lexer << Pattern("\\(", TokenType::Parens_Open);
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lexer << Pattern("\\)", TokenType::Parens_Close);
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lexer << Pattern("\\[", TokenType::Square_Open);
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lexer << Pattern("\\]", TokenType::Square_Close);
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lexer << Pattern("\\{", TokenType::Curly_Open);
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lexer << Pattern("\\}", TokenType::Curly_Close);
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lexer << Pattern(",", TokenType::Comma);
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lexer << Pattern("\"(?:[^\"\\\\]|\\\\.)*\"", TokenType::Quoted_String);
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lexer << Pattern("'(?:[^'\\\\]|\\\\.)*'", TokenType::Single_Quoted_String);
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return lexer;
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}
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BoxedCPP_System build_eval_system() {
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BoxedCPP_System ss;
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bootstrap(ss);
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bootstrap_vector<std::vector<int> >(ss, "VectorInt");
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bootstrap_vector<std::vector<Boxed_Value> >(ss, "Vector");
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// dump_system(ss);
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//Register a new function, this one with typing for us, so we don't have to ubox anything
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//right here
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register_function(ss, &print<bool>, "print");
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register_function(ss, &print<std::string>, "print");
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register_function(ss, &print<double>, "print");
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register_function(ss, &print<size_t>, "print");
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register_function(ss, &concat_string, "concat_string");
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register_function(ss, &print<int>, "print");
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ss.register_function(boost::function<void ()>(boost::bind(&dump_system, boost::ref(ss))), "dump_system");
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ss.register_function(boost::function<void (Boxed_Value)>(boost::bind(&dump_object, _1)), "dump_object");
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ss.register_function(boost::shared_ptr<Proxy_Function>(
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new Dynamic_Proxy_Function(boost::bind(&add_two, boost::ref(ss), _1), 2)), "add_two");
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return ss;
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}
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TokenPtr parse(Rule &rule, std::vector<TokenPtr> &tokens, const char *filename) {
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