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Add namespacing syntax.

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Stephen Chung
2020-05-04 17:43:54 +08:00
parent 4bf07182dc
commit ead9716f6d
8 changed files with 271 additions and 125 deletions
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12
src/result.rs
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@@ -61,6 +61,8 @@ pub enum EvalAltResult {
ErrorFor(Position),
/// Usage of an unknown variable. Wrapped value is the name of the variable.
ErrorVariableNotFound(String, Position),
/// Usage of an unknown namespace. Wrapped value is the name of the namespace.
ErrorNamespaceNotFound(String, Position),
/// Assignment to an inappropriate LHS (left-hand-side) expression.
ErrorAssignmentToUnknownLHS(Position),
/// Assignment to a constant variable.
@@ -119,6 +121,7 @@ impl EvalAltResult {
Self::ErrorLogicGuard(_) => "Boolean value expected",
Self::ErrorFor(_) => "For loop expects an array, object map, or range",
Self::ErrorVariableNotFound(_, _) => "Variable not found",
Self::ErrorNamespaceNotFound(_, _) => "Namespace not found",
Self::ErrorAssignmentToUnknownLHS(_) => {
"Assignment to an unsupported left-hand side expression"
}
@@ -150,9 +153,10 @@ impl fmt::Display for EvalAltResult {
Self::ErrorParsing(p) => write!(f, "Syntax error: {}", p),
Self::ErrorFunctionNotFound(s, pos) | Self::ErrorVariableNotFound(s, pos) => {
write!(f, "{}: '{}' ({})", desc, s, pos)
}
Self::ErrorFunctionNotFound(s, pos)
| Self::ErrorVariableNotFound(s, pos)
| Self::ErrorNamespaceNotFound(s, pos) => write!(f, "{}: '{}' ({})", desc, s, pos),
Self::ErrorDotExpr(s, pos) if !s.is_empty() => write!(f, "{} {} ({})", desc, s, pos),
Self::ErrorIndexingType(_, pos)
@@ -269,6 +273,7 @@ impl EvalAltResult {
| Self::ErrorLogicGuard(pos)
| Self::ErrorFor(pos)
| Self::ErrorVariableNotFound(_, pos)
| Self::ErrorNamespaceNotFound(_, pos)
| Self::ErrorAssignmentToUnknownLHS(pos)
| Self::ErrorAssignmentToConstant(_, pos)
| Self::ErrorMismatchOutputType(_, pos)
@@ -303,6 +308,7 @@ impl EvalAltResult {
| Self::ErrorLogicGuard(pos)
| Self::ErrorFor(pos)
| Self::ErrorVariableNotFound(_, pos)
| Self::ErrorNamespaceNotFound(_, pos)
| Self::ErrorAssignmentToUnknownLHS(pos)
| Self::ErrorAssignmentToConstant(_, pos)
| Self::ErrorMismatchOutputType(_, pos)