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Refactor meta builtins

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This commit is contained in:
ConnorSkees 2020-02-16 18:15:56 -05:00
parent 9626cbc55f
commit f081259b02
1 changed files with 7 additions and 13 deletions
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20
src/builtin/meta.rs
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@ -7,18 +7,14 @@ use crate::value::Value;
pub(crate) fn register(f: &mut BTreeMap<String, Builtin>) { pub(crate) fn register(f: &mut BTreeMap<String, Builtin>) {
decl!(f "if", |args, _| { decl!(f "if", |args, _| {
let cond: &Value = arg!(args, 0, "condition"); if arg!(args, 0, "condition").is_true() {
let if_true = arg!(args, 1, "if-true").clone(); Ok(arg!(args, 1, "if-true").eval())
let if_false = arg!(args, 2, "if-false").clone();
if cond.is_true() {
Ok(if_true)
} else { } else {
Ok(if_false) Ok(arg!(args, 2, "if-false").eval())
} }
}); });
decl!(f "feature-exists", |args, _| { decl!(f "feature-exists", |args, _| {
let feature: &Value = arg!(args, 0, "feature"); match arg!(args, 0, "feature").eval().unquote().to_string().as_str() {
match feature.clone().unquote().to_string().as_str() {
// A local variable will shadow a global variable unless // A local variable will shadow a global variable unless
// `!global` is used. // `!global` is used.
"global-variable-shadowing" => Ok(Value::False), "global-variable-shadowing" => Ok(Value::False),
@ -38,20 +34,18 @@ pub(crate) fn register(f: &mut BTreeMap<String, Builtin>) {
} }
}); });
decl!(f "unit", |args, _| { decl!(f "unit", |args, _| {
let number = arg!(args, 0, "number"); let unit = match arg!(args, 0, "number") {
let unit = match number {
Value::Dimension(_, u) => u.to_string(), Value::Dimension(_, u) => u.to_string(),
_ => String::new() _ => String::new()
}; };
Ok(Value::Ident(unit, QuoteKind::Double)) Ok(Value::Ident(unit, QuoteKind::Double))
}); });
decl!(f "type-of", |args, _| { decl!(f "type-of", |args, _| {
let value = arg!(args, 0, "value"); let value = arg!(args, 0, "value").eval();
Ok(Value::Ident(value.kind().to_owned(), QuoteKind::None)) Ok(Value::Ident(value.kind().to_owned(), QuoteKind::None))
}); });
decl!(f "unitless", |args, _| { decl!(f "unitless", |args, _| {
let number = arg!(args, 0, "number"); match arg!(args, 0, "number") {
match number {
Value::Dimension(_, Unit::None) => Ok(Value::True), Value::Dimension(_, Unit::None) => Ok(Value::True),
Value::Dimension(_, _) => Ok(Value::False), Value::Dimension(_, _) => Ok(Value::False),
_ => Ok(Value::True) _ => Ok(Value::True)