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support for [await]...of statements (#4627)

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This commit is contained in:
Alex Lam S.L
2021-02-08 20:28:23 +00:00
committed by GitHub
parent aedc1e7fc9
commit e13d1e9969
11 changed files with 203 additions and 64 deletions
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39
lib/output.js
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@@ -715,9 +715,13 @@ function OutputStream(options) {
|| p instanceof AST_Conditional
// [ a = (1, 2) ] = [] ---> a == 2
|| p instanceof AST_DefaultValue
// { [(1, 2)]: foo } = bar
// { 1: (2, foo) } = bar
|| p instanceof AST_DestructuredKeyVal
// for (foo of (bar, baz));
|| p instanceof AST_ForOf
// { [(1, 2)]: 3 }[2] ---> 3
// { foo: (1, 2) }.foo ---> 2
|| p instanceof AST_DestructuredKeyVal
|| p instanceof AST_ObjectProperty
// (1, {foo:2}).foo or (1, {foo:2})["foo"] ---> 2
|| p instanceof AST_PropAccess && p.expression === this
@@ -978,20 +982,25 @@ function OutputStream(options) {
output.space();
force_statement(self.body, output);
});
DEFPRINT(AST_ForIn, function(output) {
var self = this;
output.print("for");
output.space();
output.with_parens(function() {
self.init.print(output);
function print_for_enum(prefix, infix) {
return function(output) {
var self = this;
output.print(prefix);
output.space();
output.print("in");
output.with_parens(function() {
self.init.print(output);
output.space();
output.print(infix);
output.space();
self.object.print(output);
});
output.space();
self.object.print(output);
});
output.space();
force_statement(self.body, output);
});
force_statement(self.body, output);
};
}
DEFPRINT(AST_ForAwaitOf, print_for_enum("for await", "of"));
DEFPRINT(AST_ForIn, print_for_enum("for", "in"));
DEFPRINT(AST_ForOf, print_for_enum("for", "of"));
DEFPRINT(AST_With, function(output) {
var self = this;
output.print("with");
@@ -1226,7 +1235,7 @@ function OutputStream(options) {
def.print(output);
});
var p = output.parent();
if (p && p.init !== self || !(p instanceof AST_For || p instanceof AST_ForIn)) output.semicolon();
if (!(p instanceof AST_IterationStatement && p.init === self)) output.semicolon();
};
}
DEFPRINT(AST_Const, print_definitinos("const"));
@@ -1253,7 +1262,7 @@ function OutputStream(options) {
output.print("=");
output.space();
var p = output.parent(1);
var noin = p instanceof AST_For || p instanceof AST_ForIn;
var noin = p instanceof AST_For || p instanceof AST_ForEnumeration;
parenthesize_for_noin(self.value, output, noin);
}
});