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F#: Improved character literals (#1956)
This adds support for all F# character escapes which should result in all characters being highlighted as such. The problem was that character literals with escape sequences longer than two characters were not recognized.
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4 files changed

+26
-19
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4 files changed

+26
-19
lines changed

‎components/prism-fsharp.js‎

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Original file line numberDiff line numberDiff line change
@@ -10,7 +10,7 @@ Prism.languages.fsharp = Prism.languages.extend('clike', {
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}
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],
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'string': {
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pattern: /(?:"""[\s\S]*?"""|@"(?:""|[^"])*"|"(?:\\[\s\S]|[^\\"])*")B?|'(?:[^\\']|\\.)'B?/,
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pattern: /(?:"""[\s\S]*?"""|@"(?:""|[^"])*"|"(?:\\[\s\S]|[^\\"])*")B?|'(?:[^\\']|\\(?:.|\d{3}|x[a-fA-F\d]{2}|u[a-fA-F\d]{4}|U[a-fA-F\d]{8}))'B?/,
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greedy: true
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},
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'class-name': {

‎components/prism-fsharp.min.js‎

Lines changed: 1 addition & 1 deletion
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‎examples/prism-fsharp.html‎

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Original file line numberDiff line numberDiff line change
@@ -5,7 +5,6 @@ <h2>Comments</h2>
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<h2>Strings</h2>
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<pre><code>"foo \"bar\" baz"
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'foo \'bar\' baz'
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@"Verbatim strings"
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"""Alternate "verbatim" strings"""
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</code></pre>
@@ -58,32 +57,32 @@ <h2>Numbers</h2>
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</code></pre>
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<h2>Full example</h2>
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<pre><code>// The declaration creates a constructor that takes two values, name and age.
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<pre><code>// The declaration creates a constructor that takes two values, name and age.
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type Person(name:string, age:int) =
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// A Person object's age can be changed. The mutable keyword in the
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// declaration makes that possible.
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// A Person object's age can be changed. The mutable keyword in the
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// declaration makes that possible.
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let mutable internalAge = age
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// Declare a second constructor that takes only one argument, a name.
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// This constructor calls the constructor that requires two arguments,
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// sending 0 as the value for age.
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// Declare a second constructor that takes only one argument, a name.
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// This constructor calls the constructor that requires two arguments,
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// sending 0 as the value for age.
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new(name:string) = Person(name, 0)
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// A read-only property.
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// A read-only property.
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member this.Name = name
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// A read/write property.
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// A read/write property.
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member this.Age
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with get() = internalAge
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and set(value) = internalAge &lt;- value
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// Instance methods.
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// Increment the person's age.
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// Instance methods.
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// Increment the person's age.
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member this.HasABirthday () = internalAge &lt;- internalAge + 1
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// Check current age against some threshold.
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// Check current age against some threshold.
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member this.IsOfAge targetAge = internalAge &gt;= targetAge
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// Display the person's name and age.
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override this.ToString () =
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// Display the person's name and age.
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override this.ToString () =
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"Name: " + name + "\n" + "Age: " + (string)internalAge
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</code></pre>
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</code></pre>

‎tests/languages/fsharp/string_feature.test‎

Lines changed: 10 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -18,6 +18,10 @@ bar"""
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'a'B
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'\''
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'\\'
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'\231'
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'\x41'
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'\u0041'
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'\U0001F47D'
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----------------------------------------------------
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@@ -39,9 +43,13 @@ bar"""
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["string", "'a'"],
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["string", "'a'B"],
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["string", "'\\''"],
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["string", "'\\\\'"]
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["string", "'\\\\'"],
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["string", "'\\231'"],
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["string", "'\\x41'"],
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["string", "'\\u0041'"],
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["string", "'\\U0001F47D'"]
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]
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----------------------------------------------------
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Checks for normal strings, verbatim strings, triple-quoted strings and character literals.
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Checks for normal strings, verbatim strings, triple-quoted strings and character literals.

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