kjuulh/rhai
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Rephrase error messages.

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This commit is contained in:
Stephen Chung
2020-03-06 10:50:20 +08:00
parent c7801e1d7e
commit d8ec7ed141
3 changed files with 20 additions and 18 deletions
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30
src/engine.rs
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@@ -202,7 +202,7 @@ impl Engine<'_> {
Expr::Index(lhs, idx_expr) => {
let idx = self.eval_index_value(scope, idx_expr)?;
let (lhs_value, pos) = match lhs.as_ref() {
let (lhs_value, _) = match lhs.as_ref() {
Expr::Identifier(id, pos) => {
let get_fn_name = format!("get${}", id);
(
@@ -213,7 +213,7 @@ impl Engine<'_> {
expr => return Err(EvalAltResult::ErrorDotExpr(expr.position())),
};
Self::get_indexed_value(lhs_value, idx, pos).map(|(v, _)| v)
Self::get_indexed_value(lhs_value, idx, idx_expr.position()).map(|(v, _)| v)
}
// xxx.lhs.rhs
@@ -229,7 +229,7 @@ impl Engine<'_> {
Expr::Index(lhs, idx_expr) => {
let idx = self.eval_index_value(scope, idx_expr)?;
let (lhs_value, pos) = match lhs.as_ref() {
let (lhs_value, _) = match lhs.as_ref() {
Expr::Identifier(id, pos) => {
let get_fn_name = format!("get${}", id);
(
@@ -240,9 +240,9 @@ impl Engine<'_> {
expr => return Err(EvalAltResult::ErrorDotExpr(expr.position())),
};
Self::get_indexed_value(lhs_value, idx, pos).and_then(|(mut value, _)| {
self.get_dot_val_helper(scope, value.as_mut(), rhs)
})
Self::get_indexed_value(lhs_value, idx, idx_expr.position()).and_then(
|(mut value, _)| self.get_dot_val_helper(scope, value.as_mut(), rhs),
)
}
// Syntax error
_ => Err(EvalAltResult::ErrorDotExpr(lhs.position())),
@@ -285,7 +285,7 @@ impl Engine<'_> {
pos: Position,
) -> Result<(Dynamic, VariableType), EvalAltResult> {
if val.is::<Array>() {
let arr = val.downcast::<Array>().expect("Array expected");
let arr = val.downcast::<Array>().expect("array expected");
if idx >= 0 {
arr.get(idx as usize)
@@ -296,7 +296,7 @@ impl Engine<'_> {
Err(EvalAltResult::ErrorArrayBounds(arr.len(), idx, pos))
}
} else if val.is::<String>() {
let s = val.downcast::<String>().expect("String expected");
let s = val.downcast::<String>().expect("string expected");
if idx >= 0 {
s.chars()
@@ -311,7 +311,7 @@ impl Engine<'_> {
))
}
} else {
Err(EvalAltResult::ErrorIndexing(pos))
Err(EvalAltResult::ErrorIndexingType(pos))
}
}
@@ -325,17 +325,19 @@ impl Engine<'_> {
let idx = self.eval_index_value(scope, idx_expr)?;
match lhs {
// id[idx_expr]
Expr::Identifier(id, _) => Self::search_scope(
scope,
&id,
|val| Self::get_indexed_value(val, idx, lhs.position()),
|val| Self::get_indexed_value(val, idx, idx_expr.position()),
lhs.position(),
)
.map(|(src_idx, (val, source_type))| {
(source_type, Some((id.clone(), src_idx)), idx as usize, val)
}),
expr => Self::get_indexed_value(self.eval_expr(scope, expr)?, idx, lhs.position())
// (expr)[idx_expr]
expr => Self::get_indexed_value(self.eval_expr(scope, expr)?, idx, idx_expr.position())
.map(|(val, _)| (VariableType::Expression, None, idx as usize, val)),
}
}
@@ -377,7 +379,7 @@ impl Engine<'_> {
// Value must be a character
let ch = *val
.downcast::<char>()
.expect("value to update an index position in a string must be a char");
.expect("char value expected to update an index position in a string");
Some(Self::str_replace_char(s, idx as usize, ch).into_dynamic())
}
@@ -422,7 +424,7 @@ impl Engine<'_> {
idx,
target,
)
.expect("source_type must be either Array or String");
.expect("array or string source type expected for indexing");
}
value
@@ -516,7 +518,7 @@ impl Engine<'_> {
idx,
target,
)
.expect("source_type must be either Array or String");
.expect("array or string source_type expected for indexing");
}
value