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Implement suggestings from @fitzgen.

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This commit is contained in:
Richard Dodd 2019-01-11 19:23:33 +00:00
parent 72765757ef
commit b60d82a531
1 changed files with 17 additions and 7 deletions
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24
crates/cli-support/src/js/mod.rs
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@ -357,25 +357,31 @@ impl<'a> Context<'a> {
Ok(String::from(
"
function(i, len_ptr) {
const toString = Object.prototype.toString;
const debug_str = val => {
// primitive types
const type = typeof val;
if (type == 'number' || type == 'boolean' || val == null) {
return val + '';
return `${val}`;
}
if (type == 'string') {
return '\"' + val + '\"';
return `\"${val}\"`;
}
if (type == 'symbol') {
const description = val.description;
if (description == null) {
return 'Symbol';
} else {
return 'Symbol(' + description + ')';
return `Symbol(${description})`;
}
}
if (type == 'function') {
return 'Function';
const name = val.name;
if (typeof name == 'string') {
return `Function(${name})`;
} else {
return 'Function';
}
}
// objects
if (Array.isArray(val)) {
@ -391,19 +397,23 @@ impl<'a> Context<'a> {
return debug;
}
// Test for built-in
const builtInMatches = /\\[object ([^])+\\]/.exec(val.toString());
const builtInMatches = /\\[object ([^])+\\]/.exec(toString.call(val));
let className;
if (builtInMatches.len > 0) {
className = builtInMatches[0];
} else {
// Failed to match the standard '[object ClassName]'
return val.toString();
return toString.call(val);
}
if (className == 'Object') {
// we're a user defined class or Object
// JSON.stringify avoids problems with cycles, and is generally much
// easier than looping through ownProperties of `val`.
return 'Object(' + JSON.stringify(val) + ')';
try {
return 'Object(' + JSON.stringify(val) + ')';
} catch (_) {
return 'Object';
}
} else {
return className;
}