generic-library/ChaiScript
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Adding simple array lookup

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This commit is contained in:
Jonathan Turner
2009-06-06 22:57:11 +00:00
parent e0af874078
commit 90c1b1347d
1 changed files with 19 additions and 4 deletions
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23
wesley/main.cpp
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@@ -16,13 +16,13 @@
class TokenType { public: enum Type { File, Whitespace, Identifier, Integer, Operator, Parens_Open, Parens_Close,
Square_Open, Square_Close, Curly_Open, Curly_Close, Comma, Quoted_String, Single_Quoted_String, Carriage_Return, Semicolon,
Function_Def, Scoped_Block, Statement, Equation, Return, Expression, Term, Factor, Negate, Comment,
Value, Fun_Call, Method_Call, Comparison, If_Block, While_Block, Boolean, Real_Number }; };
Value, Fun_Call, Method_Call, Comparison, If_Block, While_Block, Boolean, Real_Number, Array_Call }; };
const char *tokentype_to_string(int tokentype) {
const char *token_types[] = {"File", "Whitespace", "Identifier", "Integer", "Operator", "Parens_Open", "Parens_Close",
"Square_Open", "Square_Close", "Curly_Open", "Curly_Close", "Comma", "Quoted_String", "Single_Quoted_String", "Carriage_Return", "Semicolon",
"Function_Def", "Scoped_Block", "Statement", "Equation", "Return", "Expression", "Term", "Factor", "Negate", "Comment",
"Value", "Fun_Call", "Method_Call", "Comparison", "If_Block", "While_Block", "Boolean", "Real Number" };
"Value", "Fun_Call", "Method_Call", "Comparison", "If_Block", "While_Block", "Boolean", "Real Number", "Array_Call" };
return token_types[tokentype];
}
@@ -188,6 +188,20 @@ Boxed_Value eval_token(BoxedCPP_System &ss, TokenPtr node) {
}
}
break;
case (TokenType::Array_Call) : {
retval = eval_token(ss, node->children[0]);
Param_List_Builder plb;
plb << retval;
plb << eval_token(ss, node->children[1]);
try {
retval = dispatch(ss.get_function("[]"), plb);
}
catch(std::exception &e){
throw EvalError("Can not find appropriate array lookup '[]'", node->children[0]);
}
}
break;
case (TokenType::Negate) : {
retval = eval_token(ss, node->children[0]);
Param_List_Builder plb;
@@ -353,6 +367,7 @@ Rule build_parser_rules() {
Rule methodcall(TokenType::Method_Call);
Rule if_block(TokenType::If_Block);
Rule while_block(TokenType::While_Block);
Rule array_call(TokenType::Array_Call);
Rule value;
Rule statements;
@@ -378,8 +393,8 @@ Rule build_parser_rules() {
methodcall = value >> +(Ign(Str(".")) >> funcall);
negate = Ign(Str("-")) >> boolean;
return_statement = Ign(Str("return")) >> boolean;
value = block | (Ign(Id(TokenType::Parens_Open)) >> boolean >> Ign(Id(TokenType::Parens_Close))) | return_statement |
array_call = Id(TokenType::Identifier) >> (Ign(Id(TokenType::Square_Open)) >> boolean >> Ign(Id(TokenType::Square_Close)));
value = array_call | block | (Ign(Id(TokenType::Parens_Open)) >> boolean >> Ign(Id(TokenType::Parens_Close))) | return_statement |
funcall | Id(TokenType::Identifier) | Id(TokenType::Real_Number) | Id(TokenType::Integer) | Id(TokenType::Quoted_String) |
Id(TokenType::Single_Quoted_String) ;