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remove AST_ArrowParametersOrSeq (#1997)

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This commit is contained in:
Alex Lam S.L
2017-05-24 17:45:18 +08:00
committed by GitHub
parent 075b648bb1
commit c988e5f4d6
2 changed files with 73 additions and 113 deletions
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73
lib/ast.js
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@@ -355,79 +355,6 @@ var AST_Expansion = DEFNODE("Expansion", "expression", {
}
});
var AST_ArrowParametersOrSeq = DEFNODE("ArrowParametersOrSeq", "expressions", {
$documentation: "A set of arrow function parameters or a sequence expression. This is used because when the parser sees a \"(\" it could be the start of a seq, or the start of a parameter list of an arrow function.",
$propdoc: {
expressions: "[AST_Expression|AST_Destructuring|AST_Expansion*] array of expressions or argument names or destructurings."
},
as_params: function (croak) {
// We don't want anything which doesn't belong in a destructuring
var root = this;
return this.expressions.map(function to_fun_args(ex, _, __, default_seen_above) {
var insert_default = function(ex, default_value) {
if (default_value) {
return new AST_DefaultAssign({
start: ex.start,
left: ex,
operator: "=",
right: default_value,
end: default_value.end
});
}
return ex;
}
if (ex instanceof AST_Object) {
return insert_default(new AST_Destructuring({
start: ex.start,
end: ex.end,
is_array: false,
names: ex.properties.map(to_fun_args)
}), default_seen_above);
} else if (ex instanceof AST_ObjectKeyVal) {
if (ex.key instanceof AST_SymbolRef) {
ex.key = to_fun_args(ex.key, 0, [ex.key]);
}
ex.value = to_fun_args(ex.value, 0, [ex.key]);
return insert_default(ex, default_seen_above);
} else if (ex instanceof AST_Hole) {
return ex;
} else if (ex instanceof AST_Destructuring) {
ex.names = ex.names.map(to_fun_args);
return insert_default(ex, default_seen_above);
} else if (ex instanceof AST_SymbolRef) {
return insert_default(new AST_SymbolFunarg({
name: ex.name,
start: ex.start,
end: ex.end
}), default_seen_above);
} else if (ex instanceof AST_Expansion) {
ex.expression = to_fun_args(ex.expression);
return insert_default(ex, default_seen_above);
} else if (ex instanceof AST_Array) {
return insert_default(new AST_Destructuring({
start: ex.start,
end: ex.end,
is_array: true,
names: ex.elements.map(to_fun_args)
}), default_seen_above);
} else if (ex instanceof AST_Assign) {
return insert_default(to_fun_args(ex.left, undefined, undefined, ex.right), default_seen_above);
} else if (ex instanceof AST_DefaultAssign) {
ex.left = to_fun_args(ex.left, 0, [ex.left]);
return ex;
} else {
croak("Invalid function parameter", ex.start.line, ex.start.col);
}
});
},
as_expr: function() {
var exprs = this.expressions;
return exprs.length == 1 ? exprs[0] : new AST_Sequence({
expressions: exprs
});
}
});
var AST_Lambda = DEFNODE("Lambda", "name argnames uses_arguments is_generator", {
$documentation: "Base class for functions",
$propdoc: {