Sha256: 0220048f26cd2b060ec78b9e3968098c3f60adec166b306ff1b00b4ed6e397e9
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Versions: 3
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Contents
/**
@module ember
*/
/**
A Glimmer2 AST transformation that replaces all instances of
```handlebars
{{#each-in iterableThing as |key value|}}
```
with
```handlebars
{{#each (-each-in iterableThing) as |value key|}}
```
@private
@class TransformHasBlockSyntax
*/
export default function transformEachInIntoEach(env) {
let { builders: b } = env.syntax;
return {
name: 'transform-each-in-into-each',
visitor: {
BlockStatement(node) {
if (node.path.original === 'each-in') {
node.params[0] = b.sexpr(b.path('-each-in'), [node.params[0]]);
let blockParams = node.program.blockParams;
if (!blockParams || blockParams.length === 0) {
// who uses {{#each-in}} without block params?!
}
else if (blockParams.length === 1) {
// insert a dummy variable for the first slot
// pick a name that won't parse so it won't shadow any real variables
blockParams = ['( unused value )', blockParams[0]];
}
else {
let key = blockParams.shift();
let value = blockParams.shift();
blockParams = [value, key, ...blockParams];
}
node.program.blockParams = blockParams;
return b.block(b.path('each'), node.params, node.hash, node.program, node.inverse, node.loc);
}
},
},
};
}
Version data entries
3 entries across 3 versions & 1 rubygems