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Don't allow escaped surrogated identifiers + introduce ascii_identifiers

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Don't use 2 characters for surrogates in identifiers because there is
support for the \u{} syntax when escaped identifiers were introduced.

Also catch eof errors while reading identifier names

Introduce ascii_identifiers:

By setting ascii_identifiers to undefined (default value),
ascii_identifiers will print identifiers using the same setting as
ascii_only within the limits of the ecmascript 6 grammar.

ascii_identifiers accept true and false, allowing identifiers to be
printed under different settings than strings with the ascii_only setting.
This commit is contained in:
Anthony Van de Gejuchte
2016-07-22 17:33:24 +02:00
committed by Richard van Velzen
parent 110a1ac885
commit 27d3669800
5 changed files with 73 additions and 9 deletions
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26
test/compress/unicode.js
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@@ -43,12 +43,13 @@ unicode_string_literals: {
expect_exact: 'var a="6 length unicode character: \\u{101111}";'
}
// Don't escape identifiers below es6 (or in this case double escaped in expect_exact)
unicode_output_es5_surrogates: {
beautify = {ascii_only: true, ecma: 5}
input: {
var \u{10000} = "6 length unicode character: \u{10FFFF}";
}
expect_exact: 'var \\ud800\\udc00="6 length unicode character: \\udbff\\udfff";'
expect_exact: 'var \u{10000}="6 length unicode character: \\udbff\\udfff";'
}
check_escape_style: {
@@ -64,6 +65,7 @@ check_escape_style: {
expect_exact: 'var a="\\x01";var \\ua0081="\\x10";var \\u0100="\\u0100";var \\u1000="\\u1000";var \\u{10000}="\\u{10000}";var \\u{2f800}="\\u{100000}";'
}
// Don't escape identifiers below es6, no escaped identifiers support and no \u{} syntax
check_escape_style_es5: {
beautify = {ascii_only: true, ecma: 5}
input: {
@@ -71,10 +73,10 @@ check_escape_style_es5: {
var \ua0081 = "\x10"; // \u0081 only in ID_Continue
var \u0100 = "\u0100";
var \u1000 = "\u1000";
var \u{10000} = "\u{10000}";
var \u{2f800} = "\u{100000}";
var \u{10000} = "\u{10000}"; // Identifier won't be escaped in es 5.1
var \u{2f800} = "\u{100000}"; // Same
}
expect_exact: 'var a="\\x01";var \\ua0081="\\x10";var \\u0100="\\u0100";var \\u1000="\\u1000";var \\ud800\\udc00="\\ud800\\udc00";var \\ud87e\\udc00="\\udbc0\\udc00";'
expect_exact: 'var a="\\x01";var \\ua0081="\\x10";var \\u0100="\\u0100";var \\u1000="\\u1000";var \ud800\udc00="\\ud800\\udc00";var \ud87e\udc00="\\udbc0\\udc00";'
}
ID_continue_with_surrogate_pair: {
@@ -99,4 +101,20 @@ non_escape_2_non_escape: {
var µþ = "µþ";
}
expect_exact: 'var µþ="µþ";'
}
non_escape_2_half_escape1: {
beautify = {ascii_only: false, ascii_identifiers: true, ecma: 6}
input: {
var µþ = "µþ";
}
expect_exact: 'var \\u00b5\\u00fe="µþ";'
}
non_escape_2_half_escape2: {
beautify = {ascii_only: true, ascii_identifiers: false, ecma: 6}
input: {
var µþ = "µþ";
}
expect_exact: 'var µþ="\\xb5\\xfe";'
}