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Merged
mikesamuel merged 1 commit into from
Mar 2, 2026
Merged

Re-enable backquoted string syntax. #366

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2 changes: 1 addition & 1 deletion astbuild/src/commonMain/kotlin/lang/temper/astbuild/Grammar.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -1811,7 +1811,7 @@ internal abstract class DomainSpecificLanguage {
val wordMatcher = Match(GrammarDoc.NonTerminal("Word"), emit = true) {
it.tokenType == TokenType.Word
}
val delimiterMatcher = patternMatcher("^\"+|'$", emit = false)
val delimiterMatcher = patternMatcher("^\"+|['`]$", emit = false)
val litMatcher = Match(
GrammarDoc.NonTerminal("Number"),
emit = true,
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16 changes: 16 additions & 0 deletions astbuild/src/commonMain/kotlin/lang/temper/astbuild/GrammarDiagrams.kt
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Expand Up @@ -13,6 +13,22 @@ private val quotedStringGrammarDoc = GrammarDoc.Choice(
GrammarDoc.Terminal("\""),
),
),
// `...`
GrammarDoc.Sequence(
listOf(
GrammarDoc.Terminal("`"),
stringContentGrammar(sourceCharacterText = "SourceCharacter - ('\\n', '\\r', '\\', '`')"),
GrammarDoc.Terminal("`"),
),
),
// '...'
GrammarDoc.Sequence(
listOf(
GrammarDoc.Terminal("'"),
stringContentGrammar(sourceCharacterText = "SourceCharacter - ('\\n', '\\r', '\\', '\\'')"),
GrammarDoc.Terminal("'"),
),
),
// """...
GrammarDoc.Sequence(
listOf(
Expand Down
17 changes: 17 additions & 0 deletions astbuild/src/commonTest/kotlin/lang/temper/astbuild/BuildTreeTest.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -1890,6 +1890,23 @@ class BuildTreeTest {
""",
)

@Test
fun taggedTemplateStringWithBackquotes() = assertAst(
input = $$"f`a${ b }`",
startProduction = "Expr",
wantJson = """
[ "Call", [
[ "Value", [ "stringExpr", "Function" ] ],
[ "RightName", "f" ],
[ "Value", [ true, "Boolean" ] ],
[ "Value", [ "a", "String" ] ],
[ "Value", [ "interpolate", "Symbol" ] ],
[ "RightName", "b" ],
]
]
""",
)

@Test
fun taggedTemplateStringWithStatementFragments() = assertAst(
input = $$"""
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12 changes: 6 additions & 6 deletions docs/for-users/.snippet-hashes.json
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Original file line number Diff line number Diff line change
Expand Up @@ -466,14 +466,14 @@
"build-user-docs/build/snippet/syntax/StmtBlock/snippet.js": "209DD7FC91CC53AB58A935DEB40D1B3A8439363E86DDF0EBC5C376619051A69C",
"build-user-docs/build/snippet/syntax/StmtBlock/snippet.md": "F758B71E7E310E302F97CE0C2765A0D71F0EC8DC930F6E2BE00A578D6F238C1B",
"build-user-docs/build/snippet/syntax/StmtBlock/snippet.svg": "FE48B62351417FE4F552AEDE3A742D504FC411FD54F0C6BD38C7D6529B482070",
"build-user-docs/build/snippet/syntax/StringExpr/snippet.js": "F785AC5D9F918AA83A758731646509DD44659B0054E79021B84B38941D6E6189",
"build-user-docs/build/snippet/syntax/StringExpr/snippet.md": "7D15C0D4170FE7BB2E1A5908F618C7B429833AD6469575B754276BB6323EDEE8",
"build-user-docs/build/snippet/syntax/StringExpr/snippet.js": "4770CDAAA87C6C36A07454C66FBBF8E3829E591AEB7AA0DFCFA2FAA17AAC98BF",
"build-user-docs/build/snippet/syntax/StringExpr/snippet.md": "78DF29E9563776F84A5F85FC2A1E38103842C31EAAF8826BFFFD5861D356AA39",
"build-user-docs/build/snippet/syntax/StringExpr/snippet.svg": "3670EC808C1342C3A7508470AA4AB8EAF89EB625446E3FED37F14FB76D074C24",
"build-user-docs/build/snippet/syntax/StringGroup/snippet.js": "987C07471633DE9E46C2382FAD11E7735F98D0F05CA076D0A36AB105ECB94B76",
"build-user-docs/build/snippet/syntax/StringGroup/snippet.md": "EE3A5FCD0275248E2BC93C90E435BD9B22589C10E7CF44D29291BD10CDB29A29",
"build-user-docs/build/snippet/syntax/StringGroup/snippet.js": "F304A1A5A3E01A44A77C3AC0AA61D9BC42E428990D3460AB5C29C9282FD1CBF3",
"build-user-docs/build/snippet/syntax/StringGroup/snippet.md": "F001EEFC8FE52D0406AE204B030F1A57B4DF6DBA64200BBE0C122634B022C70A",
"build-user-docs/build/snippet/syntax/StringGroup/snippet.svg": "23A0A3B8A6D2D84410D7AB46AD95376BC40C997F7DCBC697ABB53EB4B8DD7BCE",
"build-user-docs/build/snippet/syntax/StringGroupTagged/snippet.js": "CD4027EB4CAA1303F07B4006EFC32A5E69188D8F514F95C2596FE459AFFDFB9C",
"build-user-docs/build/snippet/syntax/StringGroupTagged/snippet.md": "4D017E9EA6DF71BA1190FA13433D6D956A540790A3ABF24625E1D69C09C92271",
"build-user-docs/build/snippet/syntax/StringGroupTagged/snippet.js": "751CC60F4215E3ECD44C792B38739A1FCED69529ED53CB353FDEEED19C380376",
"build-user-docs/build/snippet/syntax/StringGroupTagged/snippet.md": "0568E628A52CB9D0E58393FCC06A10625D73E55EA32662C0B8AAAE6FF6C423D8",
"build-user-docs/build/snippet/syntax/StringGroupTagged/snippet.svg": "161D42AAFCF4E830B79DFCABA7F7C00792D4494A313EBB8CCA96E6C10CF98275",
"build-user-docs/build/snippet/syntax/StringHole/snippet.js": "673292D00CD16C6B68A788046922FC86D5F49E6D2D37BA14855FE63DD58A1C85",
"build-user-docs/build/snippet/syntax/StringHole/snippet.md": "78EA49B02A3D91C64342B5E4D99B4217E202EAA7F0FDD033E937A8D11A03F54F",
Expand Down
6 changes: 3 additions & 3 deletions docs/for-users/temper-docs/docs/reference/syntax.md
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Expand Up @@ -452,7 +452,7 @@ Ruby-style block functions (`f { ... }`) and flow-control like

### Syntax for *StringExpr*

![StringExpr := "\u0022" (SourceCharacter - (\\n\, \\r\, \\\, \"\) | EscapeSequence | (UTF-16 Code Unit: "\\u" Hex Hex Hex Hex) | (Unicode Scalar Values: "\\u{" HexDigits+(",") "}") | (Interpolation: "\u0024{" Expr "}"))* "\u0022" | "\u0022\u0022\u0022" (Content line starting with `"`: "LineBreak" indentation (Ignored margin quote: "\u0022") ((SourceCharacter - (\\\) | EscapeSequence | (UTF-16 Code Unit: "\\u" Hex Hex Hex Hex) | (Unicode Scalar Values: "\\u{" HexDigits+(",") "}") | (Interpolation: "\u0024{" Expr "}"))* | "{:" StatementFragment ":}"))* "LineBreak"](../snippet/syntax/StringExpr/snippet.svg)
![StringExpr := "\u0022" (SourceCharacter - (\\n\, \\r\, \\\, \"\) | EscapeSequence | (UTF-16 Code Unit: "\\u" Hex Hex Hex Hex) | (Unicode Scalar Values: "\\u{" HexDigits+(",") "}") | (Interpolation: "\u0024{" Expr "}"))* "\u0022" | "`" (SourceCharacter - (\\n\, \\r\, \\\, \`\) | EscapeSequence | (UTF-16 Code Unit: "\\u" Hex Hex Hex Hex) | (Unicode Scalar Values: "\\u{" HexDigits+(",") "}") | (Interpolation: "\u0024{" Expr "}"))* "`" | "\" (SourceCharacter - (\\n\, \\r\, \\\, \\\\) | EscapeSequence | (UTF-16 Code Unit: "\\u" Hex Hex Hex Hex) | (Unicode Scalar Values: "\\u{" HexDigits+(",") "}") | (Interpolation: "\u0024{" Expr "}"))* "\" | "\u0022\u0022\u0022" (Content line starting with `"`: "LineBreak" indentation (Ignored margin quote: "\u0022") ((SourceCharacter - (\\\) | EscapeSequence | (UTF-16 Code Unit: "\\u" Hex Hex Hex Hex) | (Unicode Scalar Values: "\\u{" HexDigits+(",") "}") | (Interpolation: "\u0024{" Expr "}"))* | "{:" StatementFragment ":}"))* "LineBreak"](../snippet/syntax/StringExpr/snippet.svg)

<!-- /snippet: syntax/StringExpr -->

Expand Down Expand Up @@ -1457,7 +1457,7 @@ There are two kinds of match cases: run-time type checks that use keyword `is`,

#### Syntax for *StringGroup*

![StringGroup &#58;&#61; &#34;&#92;u0022&#34; &#40;SourceCharacter &#45; &#40;&#92;&#92;n&#92;&#44; &#92;&#92;r&#92;&#44; &#92;&#92;&#92;&#44; &#92;&#34;&#92;&#41; &#124; EscapeSequence &#124; &#40;UTF&#45;16 Code Unit&#58; &#34;&#92;&#92;u&#34; Hex Hex Hex Hex&#41; &#124; &#40;Unicode Scalar Values&#58; &#34;&#92;&#92;u&#123;&#34; HexDigits&#43;&#40;&#34;&#44;&#34;&#41; &#34;&#125;&#34;&#41; &#124; &#40;Interpolation&#58; &#34;&#92;u0024&#123;&#34; Expr &#34;&#125;&#34;&#41;&#41;&#42; &#34;&#92;u0022&#34; &#124; &#34;&#92;u0022&#92;u0022&#92;u0022&#34; &#40;Content line starting with &#96;&#34;&#96;&#58; &#34;LineBreak&#34; indentation &#40;Ignored margin quote&#58; &#34;&#92;u0022&#34;&#41; &#40;&#40;SourceCharacter &#45; &#40;&#92;&#92;&#92;&#41; &#124; EscapeSequence &#124; &#40;UTF&#45;16 Code Unit&#58; &#34;&#92;&#92;u&#34; Hex Hex Hex Hex&#41; &#124; &#40;Unicode Scalar Values&#58; &#34;&#92;&#92;u&#123;&#34; HexDigits&#43;&#40;&#34;&#44;&#34;&#41; &#34;&#125;&#34;&#41; &#124; &#40;Interpolation&#58; &#34;&#92;u0024&#123;&#34; Expr &#34;&#125;&#34;&#41;&#41;&#42; &#124; &#34;&#123;&#58;&#34; StatementFragment &#34;&#58;&#125;&#34;&#41;&#41;&#42; &#34;LineBreak&#34;](../snippet/syntax/StringGroup/snippet.svg)
![StringGroup &#58;&#61; &#34;&#92;u0022&#34; &#40;SourceCharacter &#45; &#40;&#92;&#92;n&#92;&#44; &#92;&#92;r&#92;&#44; &#92;&#92;&#92;&#44; &#92;&#34;&#92;&#41; &#124; EscapeSequence &#124; &#40;UTF&#45;16 Code Unit&#58; &#34;&#92;&#92;u&#34; Hex Hex Hex Hex&#41; &#124; &#40;Unicode Scalar Values&#58; &#34;&#92;&#92;u&#123;&#34; HexDigits&#43;&#40;&#34;&#44;&#34;&#41; &#34;&#125;&#34;&#41; &#124; &#40;Interpolation&#58; &#34;&#92;u0024&#123;&#34; Expr &#34;&#125;&#34;&#41;&#41;&#42; &#34;&#92;u0022&#34; &#124; &#34;&#96;&#34; &#40;SourceCharacter &#45; &#40;&#92;&#92;n&#92;&#44; &#92;&#92;r&#92;&#44; &#92;&#92;&#92;&#44; &#92;&#96;&#92;&#41; &#124; EscapeSequence &#124; &#40;UTF&#45;16 Code Unit&#58; &#34;&#92;&#92;u&#34; Hex Hex Hex Hex&#41; &#124; &#40;Unicode Scalar Values&#58; &#34;&#92;&#92;u&#123;&#34; HexDigits&#43;&#40;&#34;&#44;&#34;&#41; &#34;&#125;&#34;&#41; &#124; &#40;Interpolation&#58; &#34;&#92;u0024&#123;&#34; Expr &#34;&#125;&#34;&#41;&#41;&#42; &#34;&#96;&#34; &#124; &#34;&#92;&#34; &#40;SourceCharacter &#45; &#40;&#92;&#92;n&#92;&#44; &#92;&#92;r&#92;&#44; &#92;&#92;&#92;&#44; &#92;&#92;&#92;&#92;&#41; &#124; EscapeSequence &#124; &#40;UTF&#45;16 Code Unit&#58; &#34;&#92;&#92;u&#34; Hex Hex Hex Hex&#41; &#124; &#40;Unicode Scalar Values&#58; &#34;&#92;&#92;u&#123;&#34; HexDigits&#43;&#40;&#34;&#44;&#34;&#41; &#34;&#125;&#34;&#41; &#124; &#40;Interpolation&#58; &#34;&#92;u0024&#123;&#34; Expr &#34;&#125;&#34;&#41;&#41;&#42; &#34;&#92;&#34; &#124; &#34;&#92;u0022&#92;u0022&#92;u0022&#34; &#40;Content line starting with &#96;&#34;&#96;&#58; &#34;LineBreak&#34; indentation &#40;Ignored margin quote&#58; &#34;&#92;u0022&#34;&#41; &#40;&#40;SourceCharacter &#45; &#40;&#92;&#92;&#92;&#41; &#124; EscapeSequence &#124; &#40;UTF&#45;16 Code Unit&#58; &#34;&#92;&#92;u&#34; Hex Hex Hex Hex&#41; &#124; &#40;Unicode Scalar Values&#58; &#34;&#92;&#92;u&#123;&#34; HexDigits&#43;&#40;&#34;&#44;&#34;&#41; &#34;&#125;&#34;&#41; &#124; &#40;Interpolation&#58; &#34;&#92;u0024&#123;&#34; Expr &#34;&#125;&#34;&#41;&#41;&#42; &#124; &#34;&#123;&#58;&#34; StatementFragment &#34;&#58;&#125;&#34;&#41;&#41;&#42; &#34;LineBreak&#34;](../snippet/syntax/StringGroup/snippet.svg)

<!-- /snippet: syntax/StringGroup -->

Expand All @@ -1467,7 +1467,7 @@ There are two kinds of match cases: run-time type checks that use keyword `is`,

#### Syntax for *StringGroupTagged*

![StringGroupTagged &#58;&#61; &#40;Whether escape sequences are expanded is up to the tag&#58; &#34;&#92;u0022&#34; &#40;SourceCharacter &#45; &#40;&#92;&#92;n&#92;&#44; &#92;&#92;r&#92;&#44; &#92;&#92;&#92;&#44; &#92;&#34;&#92;&#41; &#124; EscapeSequence &#124; &#40;UTF&#45;16 Code Unit&#58; &#34;&#92;&#92;u&#34; Hex Hex Hex Hex&#41; &#124; &#40;Unicode Scalar Values&#58; &#34;&#92;&#92;u&#123;&#34; HexDigits&#43;&#40;&#34;&#44;&#34;&#41; &#34;&#125;&#34;&#41; &#124; &#40;Interpolation&#58; &#34;&#92;u0024&#123;&#34; Expr &#34;&#125;&#34;&#41;&#41;&#42; &#34;&#92;u0022&#34; &#124; &#34;&#92;u0022&#92;u0022&#92;u0022&#34; &#40;Content line starting with &#96;&#34;&#96;&#58; &#34;LineBreak&#34; indentation &#40;Ignored margin quote&#58; &#34;&#92;u0022&#34;&#41; &#40;&#40;SourceCharacter &#45; &#40;&#92;&#92;&#92;&#41; &#124; EscapeSequence &#124; &#40;UTF&#45;16 Code Unit&#58; &#34;&#92;&#92;u&#34; Hex Hex Hex Hex&#41; &#124; &#40;Unicode Scalar Values&#58; &#34;&#92;&#92;u&#123;&#34; HexDigits&#43;&#40;&#34;&#44;&#34;&#41; &#34;&#125;&#34;&#41; &#124; &#40;Interpolation&#58; &#34;&#92;u0024&#123;&#34; Expr &#34;&#125;&#34;&#41;&#41;&#42; &#124; &#34;&#123;&#58;&#34; StatementFragment &#34;&#58;&#125;&#34;&#41;&#41;&#42; &#34;LineBreak&#34;&#41;](../snippet/syntax/StringGroupTagged/snippet.svg)
![StringGroupTagged &#58;&#61; &#40;Whether escape sequences are expanded is up to the tag&#58; &#34;&#92;u0022&#34; &#40;SourceCharacter &#45; &#40;&#92;&#92;n&#92;&#44; &#92;&#92;r&#92;&#44; &#92;&#92;&#92;&#44; &#92;&#34;&#92;&#41; &#124; EscapeSequence &#124; &#40;UTF&#45;16 Code Unit&#58; &#34;&#92;&#92;u&#34; Hex Hex Hex Hex&#41; &#124; &#40;Unicode Scalar Values&#58; &#34;&#92;&#92;u&#123;&#34; HexDigits&#43;&#40;&#34;&#44;&#34;&#41; &#34;&#125;&#34;&#41; &#124; &#40;Interpolation&#58; &#34;&#92;u0024&#123;&#34; Expr &#34;&#125;&#34;&#41;&#41;&#42; &#34;&#92;u0022&#34; &#124; &#34;&#96;&#34; &#40;SourceCharacter &#45; &#40;&#92;&#92;n&#92;&#44; &#92;&#92;r&#92;&#44; &#92;&#92;&#92;&#44; &#92;&#96;&#92;&#41; &#124; EscapeSequence &#124; &#40;UTF&#45;16 Code Unit&#58; &#34;&#92;&#92;u&#34; Hex Hex Hex Hex&#41; &#124; &#40;Unicode Scalar Values&#58; &#34;&#92;&#92;u&#123;&#34; HexDigits&#43;&#40;&#34;&#44;&#34;&#41; &#34;&#125;&#34;&#41; &#124; &#40;Interpolation&#58; &#34;&#92;u0024&#123;&#34; Expr &#34;&#125;&#34;&#41;&#41;&#42; &#34;&#96;&#34; &#124; &#34;&#92;&#34; &#40;SourceCharacter &#45; &#40;&#92;&#92;n&#92;&#44; &#92;&#92;r&#92;&#44; &#92;&#92;&#92;&#44; &#92;&#92;&#92;&#92;&#41; &#124; EscapeSequence &#124; &#40;UTF&#45;16 Code Unit&#58; &#34;&#92;&#92;u&#34; Hex Hex Hex Hex&#41; &#124; &#40;Unicode Scalar Values&#58; &#34;&#92;&#92;u&#123;&#34; HexDigits&#43;&#40;&#34;&#44;&#34;&#41; &#34;&#125;&#34;&#41; &#124; &#40;Interpolation&#58; &#34;&#92;u0024&#123;&#34; Expr &#34;&#125;&#34;&#41;&#41;&#42; &#34;&#92;&#34; &#124; &#34;&#92;u0022&#92;u0022&#92;u0022&#34; &#40;Content line starting with &#96;&#34;&#96;&#58; &#34;LineBreak&#34; indentation &#40;Ignored margin quote&#58; &#34;&#92;u0022&#34;&#41; &#40;&#40;SourceCharacter &#45; &#40;&#92;&#92;&#92;&#41; &#124; EscapeSequence &#124; &#40;UTF&#45;16 Code Unit&#58; &#34;&#92;&#92;u&#34; Hex Hex Hex Hex&#41; &#124; &#40;Unicode Scalar Values&#58; &#34;&#92;&#92;u&#123;&#34; HexDigits&#43;&#40;&#34;&#44;&#34;&#41; &#34;&#125;&#34;&#41; &#124; &#40;Interpolation&#58; &#34;&#92;u0024&#123;&#34; Expr &#34;&#125;&#34;&#41;&#41;&#42; &#124; &#34;&#123;&#58;&#34; StatementFragment &#34;&#58;&#125;&#34;&#41;&#41;&#42; &#34;LineBreak&#34;&#41;](../snippet/syntax/StringGroupTagged/snippet.svg)

<!-- /snippet: syntax/StringGroupTagged -->

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2 changes: 1 addition & 1 deletion docs/for-users/temper-docs/docs/reference/types.md
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Expand Up @@ -1590,7 +1590,7 @@ A *String* is a chunk of textual content.

<a name="syntax&#45;StringExpr" class="snippet-anchor-name"></a>

![StringExpr &#58;&#61; &#34;&#92;u0022&#34; &#40;SourceCharacter &#45; &#40;&#92;&#92;n&#92;&#44; &#92;&#92;r&#92;&#44; &#92;&#92;&#92;&#44; &#92;&#34;&#92;&#41; &#124; EscapeSequence &#124; &#40;UTF&#45;16 Code Unit&#58; &#34;&#92;&#92;u&#34; Hex Hex Hex Hex&#41; &#124; &#40;Unicode Scalar Values&#58; &#34;&#92;&#92;u&#123;&#34; HexDigits&#43;&#40;&#34;&#44;&#34;&#41; &#34;&#125;&#34;&#41; &#124; &#40;Interpolation&#58; &#34;&#92;u0024&#123;&#34; Expr &#34;&#125;&#34;&#41;&#41;&#42; &#34;&#92;u0022&#34; &#124; &#34;&#92;u0022&#92;u0022&#92;u0022&#34; &#40;Content line starting with &#96;&#34;&#96;&#58; &#34;LineBreak&#34; indentation &#40;Ignored margin quote&#58; &#34;&#92;u0022&#34;&#41; &#40;&#40;SourceCharacter &#45; &#40;&#92;&#92;&#92;&#41; &#124; EscapeSequence &#124; &#40;UTF&#45;16 Code Unit&#58; &#34;&#92;&#92;u&#34; Hex Hex Hex Hex&#41; &#124; &#40;Unicode Scalar Values&#58; &#34;&#92;&#92;u&#123;&#34; HexDigits&#43;&#40;&#34;&#44;&#34;&#41; &#34;&#125;&#34;&#41; &#124; &#40;Interpolation&#58; &#34;&#92;u0024&#123;&#34; Expr &#34;&#125;&#34;&#41;&#41;&#42; &#124; &#34;&#123;&#58;&#34; StatementFragment &#34;&#58;&#125;&#34;&#41;&#41;&#42; &#34;LineBreak&#34;](../snippet/syntax/StringExpr/snippet.svg)
![StringExpr &#58;&#61; &#34;&#92;u0022&#34; &#40;SourceCharacter &#45; &#40;&#92;&#92;n&#92;&#44; &#92;&#92;r&#92;&#44; &#92;&#92;&#92;&#44; &#92;&#34;&#92;&#41; &#124; EscapeSequence &#124; &#40;UTF&#45;16 Code Unit&#58; &#34;&#92;&#92;u&#34; Hex Hex Hex Hex&#41; &#124; &#40;Unicode Scalar Values&#58; &#34;&#92;&#92;u&#123;&#34; HexDigits&#43;&#40;&#34;&#44;&#34;&#41; &#34;&#125;&#34;&#41; &#124; &#40;Interpolation&#58; &#34;&#92;u0024&#123;&#34; Expr &#34;&#125;&#34;&#41;&#41;&#42; &#34;&#92;u0022&#34; &#124; &#34;&#96;&#34; &#40;SourceCharacter &#45; &#40;&#92;&#92;n&#92;&#44; &#92;&#92;r&#92;&#44; &#92;&#92;&#92;&#44; &#92;&#96;&#92;&#41; &#124; EscapeSequence &#124; &#40;UTF&#45;16 Code Unit&#58; &#34;&#92;&#92;u&#34; Hex Hex Hex Hex&#41; &#124; &#40;Unicode Scalar Values&#58; &#34;&#92;&#92;u&#123;&#34; HexDigits&#43;&#40;&#34;&#44;&#34;&#41; &#34;&#125;&#34;&#41; &#124; &#40;Interpolation&#58; &#34;&#92;u0024&#123;&#34; Expr &#34;&#125;&#34;&#41;&#41;&#42; &#34;&#96;&#34; &#124; &#34;&#92;&#34; &#40;SourceCharacter &#45; &#40;&#92;&#92;n&#92;&#44; &#92;&#92;r&#92;&#44; &#92;&#92;&#92;&#44; &#92;&#92;&#92;&#92;&#41; &#124; EscapeSequence &#124; &#40;UTF&#45;16 Code Unit&#58; &#34;&#92;&#92;u&#34; Hex Hex Hex Hex&#41; &#124; &#40;Unicode Scalar Values&#58; &#34;&#92;&#92;u&#123;&#34; HexDigits&#43;&#40;&#34;&#44;&#34;&#41; &#34;&#125;&#34;&#41; &#124; &#40;Interpolation&#58; &#34;&#92;u0024&#123;&#34; Expr &#34;&#125;&#34;&#41;&#41;&#42; &#34;&#92;&#34; &#124; &#34;&#92;u0022&#92;u0022&#92;u0022&#34; &#40;Content line starting with &#96;&#34;&#96;&#58; &#34;LineBreak&#34; indentation &#40;Ignored margin quote&#58; &#34;&#92;u0022&#34;&#41; &#40;&#40;SourceCharacter &#45; &#40;&#92;&#92;&#92;&#41; &#124; EscapeSequence &#124; &#40;UTF&#45;16 Code Unit&#58; &#34;&#92;&#92;u&#34; Hex Hex Hex Hex&#41; &#124; &#40;Unicode Scalar Values&#58; &#34;&#92;&#92;u&#123;&#34; HexDigits&#43;&#40;&#34;&#44;&#34;&#41; &#34;&#125;&#34;&#41; &#124; &#40;Interpolation&#58; &#34;&#92;u0024&#123;&#34; Expr &#34;&#125;&#34;&#41;&#41;&#42; &#124; &#34;&#123;&#58;&#34; StatementFragment &#34;&#58;&#125;&#34;&#41;&#41;&#42; &#34;LineBreak&#34;](../snippet/syntax/StringExpr/snippet.svg)

<!-- /snippet: syntax/StringExpr -->

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