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Encapsulate scope into EvalContext;

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Fix bug with custom syntax delta.
This commit is contained in:
Stephen Chung
2020-10-19 19:11:55 +08:00
parent d1f9f4096d
commit a9fd0ff4de
15 changed files with 138 additions and 108 deletions
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12
tests/var_scope.rs
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@@ -62,7 +62,7 @@ fn test_var_resolver() -> Result<(), Box<EvalAltResult>> {
scope.push("chameleon", 123 as INT);
scope.push("DO_NOT_USE", 999 as INT);
engine.on_var(|name, _, scope, _| {
engine.on_var(|name, _, context| {
match name {
"MYSTIC_NUMBER" => Ok(Some((42 as INT).into())),
// Override a variable - make it not found even if it exists!
@@ -70,9 +70,13 @@ fn test_var_resolver() -> Result<(), Box<EvalAltResult>> {
Err(EvalAltResult::ErrorVariableNotFound(name.to_string(), Position::none()).into())
}
// Silently maps 'chameleon' into 'innocent'.
"chameleon" => scope.get_value("innocent").map(Some).ok_or_else(|| {
EvalAltResult::ErrorVariableNotFound(name.to_string(), Position::none()).into()
}),
"chameleon" => context
.scope
.get_value("innocent")
.map(Some)
.ok_or_else(|| {
EvalAltResult::ErrorVariableNotFound(name.to_string(), Position::none()).into()
}),
// Return Ok(None) to continue with the normal variable resolution process.
_ => Ok(None),
}