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Detect duplicated parameters in function definitions.

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This commit is contained in:
Stephen Chung
2020-03-27 16:46:08 +08:00
parent 337a96394f
commit 796690f506
4 changed files with 48 additions and 9 deletions
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10
src/error.rs
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@@ -82,6 +82,9 @@ pub enum ParseErrorType {
/// A function definition is missing the parameters list. Wrapped value is the function name.
#[cfg(not(feature = "no_function"))]
FnMissingParams(String),
/// A function definition has duplicated parameters. Wrapped values are the function name and parameter name.
#[cfg(not(feature = "no_function"))]
FnDuplicateParam(String, String),
/// A function definition is missing the body. Wrapped value is the function name.
#[cfg(not(feature = "no_function"))]
FnMissingBody(String),
@@ -146,6 +149,8 @@ impl ParseError {
#[cfg(not(feature = "no_function"))]
ParseErrorType::FnMissingParams(_) => "Expecting parameters in function declaration",
#[cfg(not(feature = "no_function"))]
ParseErrorType::FnDuplicateParam(_,_) => "Duplicated parameters in function declaration",
#[cfg(not(feature = "no_function"))]
ParseErrorType::FnMissingBody(_) => "Expecting body statement block for function declaration",
#[cfg(not(feature = "no_function"))]
ParseErrorType::WrongFnDefinition => "Function definitions must be at global level and cannot be inside a block or another function",
@@ -187,6 +192,11 @@ impl fmt::Display for ParseError {
write!(f, "Expecting body statement block for function '{}'", s)?
}
#[cfg(not(feature = "no_function"))]
ParseErrorType::FnDuplicateParam(ref s, ref arg) => {
write!(f, "Duplicated parameter '{}' for function '{}'", arg, s)?
}
ParseErrorType::MissingRightParen(ref s) | ParseErrorType::MissingRightBrace(ref s) => {
write!(f, "{} for {}", self.desc(), s)?
}