Function to parse grammar within an expression rule
(expression: Pair<Rule>)
| 245 | |
| 246 | //Function to parse grammar within an expression rule |
| 247 | fn parse_expression(expression: Pair<Rule>) -> Expr { |
| 248 | let expression = expression.clone().into_inner().next().unwrap(); |
| 249 | match expression.as_rule() { |
| 250 | Rule::literal => { |
| 251 | // Parsing literals need to recurse because it could be a number literal |
| 252 | Expr::Literal(parse_literal(expression)) |
| 253 | } |
| 254 | Rule::number_literal => parse_expression(expression), |
| 255 | Rule::hex_number => { |
| 256 | // TODO: parse hex numbers |
| 257 | let initial = expression.as_str(); |
| 258 | Expr::Literal(ExprLiteral::Number(ExprLiteralNumber { |
| 259 | inferred_type: None, |
| 260 | value: U256::from_str_radix(initial, 16).unwrap(), |
| 261 | })) |
| 262 | } |
| 263 | Rule::hex_literal => { |
| 264 | // TODO: parse hex numbers |
| 265 | let initial = expression.as_str(); |
| 266 | Expr::Literal(ExprLiteral::Number(ExprLiteralNumber { |
| 267 | inferred_type: None, |
| 268 | value: U256::from_str_radix(initial, 16).unwrap(), |
| 269 | })) |
| 270 | } |
| 271 | Rule::decimal_number => { |
| 272 | let i = expression.as_str(); |
| 273 | Expr::Literal(ExprLiteral::Number(ExprLiteralNumber { |
| 274 | inferred_type: None, |
| 275 | value: U256::from_dec_str(i).unwrap(), |
| 276 | })) |
| 277 | } |
| 278 | Rule::string_literal => { |
| 279 | let content = expression.into_inner().next().unwrap(); |
| 280 | Expr::Literal(ExprLiteral::String(content.as_str().to_string())) |
| 281 | } |
| 282 | |
| 283 | // //rule is a false literal |
| 284 | // Rule::false_literal => Expr::Bool(false), |
| 285 | |
| 286 | // //rule is a true literal |
| 287 | // Rule::true_literal => Expr::Bool(true), |
| 288 | |
| 289 | //if the matched rule is an identifier |
| 290 | Rule::identifier => parse_identifier(expression), |
| 291 | |
| 292 | //if the matched rule is a function call |
| 293 | Rule::function_call => { |
| 294 | let mut inners = expression.into_inner(); |
| 295 | let function_name = inners.next().unwrap().as_str(); |
| 296 | let mut exprs: Vec<Expr> = Vec::new(); |
| 297 | // for each argument in the function, parse the expression and add it to exprs |
| 298 | for arg in inners { |
| 299 | exprs.push(parse_expression(arg)); |
| 300 | } |
| 301 | Expr::FunctionCall(ExprFunctionCall { |
| 302 | function_name: function_name.to_string(), |
| 303 | exprs: Box::new(exprs), |
| 304 | inferred_return_types: vec![], |
no test coverage detected