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81 lines
5.6 KiB
JavaScript
81 lines
5.6 KiB
JavaScript
// Copyright 2023 Ron Buckton. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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author: Ron Buckton
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description: >
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dotAll (`s`) modifier can be added via `(?s:)` or `(?s-:)`.
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info: |
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Runtime Semantics: CompileAtom
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The syntax-directed operation CompileAtom takes arguments direction (forward or backward) and modifiers (a Modifiers Record) and returns a Matcher.
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Atom :: `(` `?` RegularExpressionFlags `-` RegularExpressionFlags `:` Disjunction `)`
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1. Let addModifiers be the source text matched by the first RegularExpressionFlags.
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2. Let removeModifiers be the source text matched by the second RegularExpressionFlags.
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3. Let newModifiers be UpdateModifiers(modifiers, CodePointsToString(addModifiers), CodePointsToString(removeModifiers)).
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4. Return CompileSubpattern of Disjunction with arguments direction and newModifiers.
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UpdateModifiers ( modifiers, add, remove )
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The abstract operation UpdateModifiers takes arguments modifiers (a Modifiers Record), add (a String), and remove (a String) and returns a Modifiers. It performs the following steps when called:
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1. Let dotAll be modifiers.[[DotAll]].
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2. Let ignoreCase be modifiers.[[IgnoreCase]].
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3. Let multiline be modifiers.[[Multiline]].
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4. If add contains "s", set dotAll to true.
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5. If add contains "i", set ignoreCase to true.
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6. If add contains "m", set multiline to true.
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7. If remove contains "s", set dotAll to false.
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8. If remove contains "i", set ignoreCase to false.
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9. If remove contains "m", set multiline to false.
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10. Return the Modifiers Record { [[DotAll]]: dotAll, [[IgnoreCase]]: ignoreCase, [[Multiline]]: multiline }.
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esid: sec-compileatom
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features: [regexp-modifiers]
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---*/
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var re1 = /(?-s:^.$)/s;
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assert(re1.test("a"), "Pattern character '.' should match non-line terminators in modified group");
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assert(re1.test("3"), "Pattern character '.' should match non-line terminators in modified group");
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assert(re1.test("π"), "Pattern character '.' should match non-line terminators in modified group");
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assert(re1.test("\u2027"), "Pattern character '.' should match non-line terminators in modified group");
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assert(re1.test("\u0085"), "Pattern character '.' should match non-line terminators in modified group");
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assert(re1.test("\v"), "Pattern character '.' should match mon-line terminators in modified group");
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assert(re1.test("\f"), "Pattern character '.' should match mon-line terminators in modified group");
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assert(re1.test("\u180E"), "Pattern character '.' should match non-line terminators in modified group");
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assert(!re1.test("\u{10300}"), "Supplementary plane not matched by a single .");
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assert(!re1.test("\n"), "Pattern character '.' should not match '\\n' in modified group");
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assert(!re1.test("\r"), "Pattern character '.' should not match '\\r' in modified group");
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assert(!re1.test("\u2028"), "Pattern character '.' should not match '\\u2028' in modified group");
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assert(!re1.test("\u2029"), "Pattern character '.' should not match '\\u2029' in modified group");
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assert(re1.test("\uD800"), "Pattern character '.' should match non-line terminators in modified group");
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assert(re1.test("\uDFFF"), "Pattern character '.' should match non-line terminators in modified group");
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var re2 = new RegExp("(?-s:^.$)", "s");
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assert(re2.test("a"), "Pattern character '.' should match non-line terminators in modified group");
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assert(re2.test("3"), "Pattern character '.' should match non-line terminators in modified group");
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assert(re2.test("π"), "Pattern character '.' should match non-line terminators in modified group");
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assert(re2.test("\u2027"), "Pattern character '.' should match non-line terminators in modified group");
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assert(re2.test("\u0085"), "Pattern character '.' should match non-line terminators in modified group");
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assert(re2.test("\v"), "Pattern character '.' should match mon-line terminators in modified group");
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assert(re2.test("\f"), "Pattern character '.' should match mon-line terminators in modified group");
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assert(re2.test("\u180E"), "Pattern character '.' should match non-line terminators in modified group");
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assert(!re2.test("\u{10300}"), "Supplementary plane not matched by a single .");
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assert(!re2.test("\n"), "Pattern character '.' should not match '\\n' in modified group");
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assert(!re2.test("\r"), "Pattern character '.' should not match '\\r' in modified group");
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assert(!re2.test("\u2028"), "Pattern character '.' should not match '\\u2028' in modified group");
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assert(!re2.test("\u2029"), "Pattern character '.' should not match '\\u2029' in modified group");
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assert(re2.test("\uD800"), "Pattern character '.' should match non-line terminators in modified group");
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assert(re2.test("\uDFFF"), "Pattern character '.' should match non-line terminators in modified group");
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var re3 = /a.(?-s:b.b).c/s;
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assert(re3.test("a,b,b,c"), "Pattern character '.' should match non-line terminators in modified group");
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assert(re3.test("a\nb,b\nc"), "Pattern character '.' should match line terminators outside modified group");
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assert(!re3.test("a,b\nb,c"), "Pattern character '.' should not match line terminators in modified group");
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assert(!re3.test("a\nb\nb\nc"), "Pattern character '.' should not match line terminators in modified group");
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var re4 = new RegExp("a.(?-s:b.b).c", "s");
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assert(re4.test("a,b,b,c"), "Pattern character '.' should match non-line terminators in modified group");
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assert(re4.test("a\nb,b\nc"), "Pattern character '.' should match line terminators outside modified group");
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assert(!re4.test("a,b\nb,c"), "Pattern character '.' should not match line terminators in modified group");
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assert(!re4.test("a\nb\nb\nc"), "Pattern character '.' should not match line terminators in modified group");
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