feat(pkl): add parser and queries (#8011)

3 files changed, 215 insertions, 0 deletions

diff --git a/runtime/queries/pkl/folds.scm b/runtime/queries/pkl/folds.scm
new file mode 100644
index 000000000..385c4ceb9
--- /dev/null
+++ b/runtime/queries/pkl/folds.scm
@@ -0,0 +1,6 @@
+[
+  (clazz)
+  (objectBody)
+] @fold
+
+(importClause)+ @fold
diff --git a/runtime/queries/pkl/highlights.scm b/runtime/queries/pkl/highlights.scm
new file mode 100644
index 000000000..bc7e72757
--- /dev/null
+++ b/runtime/queries/pkl/highlights.scm
@@ -0,0 +1,203 @@
+(identifier) @variable
+
+(qualifiedAccessExpr
+  (identifier) @function.method.call
+  .
+  (argumentList))
+
+(qualifiedAccessExpr
+  (identifier) @variable.member .)
+
+; Operators
+[
+  "??"
+  "@"
+  "="
+  "<"
+  ">"
+  "!"
+  "=="
+  "!="
+  "<="
+  ">="
+  "&&"
+  "||"
+  "+"
+  "-"
+  "**"
+  "*"
+  "/"
+  "~/"
+  "%"
+  "|>"
+  "..."
+  "|"
+  "->"
+] @operator
+
+[
+  ","
+  ":"
+  "."
+  "?."
+] @punctuation.delimiter
+
+[
+  "("
+  ")"
+  "["
+  "]"
+  "{"
+  "}"
+] @punctuation.bracket
+
+; Types
+(clazz
+  (identifier) @type.definition)
+
+(typeAlias
+  (identifier) @type.definition)
+
+((identifier) @type
+  (#lua-match? @type "^[A-Z]"))
+
+(typeArgumentList
+  [
+    "<"
+    ">"
+  ] @punctuation.bracket)
+
+; Method definitions
+(classMethod
+  (methodHeader
+    (identifier) @function.method))
+
+(objectMethod
+  (methodHeader
+    (identifier) @function.method))
+
+; Identifiers
+(classProperty
+  (identifier) @property)
+
+(objectProperty
+  (identifier) @property)
+
+(parameterList
+  (typedIdentifier
+    (identifier) @variable.parameter))
+
+(objectBodyParameters
+  (typedIdentifier
+    (identifier) @variable.parameter))
+
+; Literals
+[
+  (stringConstant)
+  (slStringLiteralExpr)
+  (mlStringLiteralExpr)
+] @string
+
+(escapeSequence) @string.escape
+
+(intLiteralExpr) @number
+
+(floatLiteralExpr) @number.float
+
+(stringInterpolation
+  [
+    "\\("
+    "\\#("
+    "\\##("
+    "\\###("
+    "\\####("
+    "\\#####("
+    "\\######("
+  ] @punctuation.special
+  ")" @punctuation.special)
+
+(nullableType
+  "?" @punctuation.special)
+
+[
+  (lineComment)
+  (blockComment)
+] @comment @spell
+
+(docComment) @comment.documentation @spell
+
+(shebangComment) @keyword.directive
+
+; Keywords
+[
+  "abstract"
+  "external"
+  "for"
+  "is"
+  "let"
+  "new"
+  "out"
+] @keyword
+
+"function" @keyword.function
+
+[
+  "as"
+  "in"
+] @keyword.operator
+
+[
+  "typealias"
+  "class"
+  "module"
+] @keyword.type
+
+[
+  "import"
+  "import*"
+  "amends"
+  "extends"
+] @keyword.import
+
+[
+  "when"
+  "if"
+  "else"
+] @keyword.conditional
+
+(modifier) @keyword.modifier
+
+(importExpr
+  [
+    "import"
+    "import*"
+  ] @function.builtin)
+
+(moduleExpr
+  "module" @type.builtin)
+
+[
+  (outerExpr)
+  "super"
+  (thisExpr)
+] @variable.builtin
+
+[
+  "read"
+  "read?"
+  "read*"
+  "throw"
+  "trace"
+] @function.builtin
+
+(nullLiteralExpr) @constant.builtin
+
+[
+  (falseLiteralExpr)
+  (trueLiteralExpr)
+] @boolean
+
+(newExpr
+  (declaredType
+    (qualifiedIdentifier
+      (identifier) @constructor .)))
diff --git a/runtime/queries/pkl/injections.scm b/runtime/queries/pkl/injections.scm
new file mode 100644
index 000000000..9d563b440
--- /dev/null
+++ b/runtime/queries/pkl/injections.scm
@@ -0,0 +1,6 @@
+([
+  (lineComment)
+  (blockComment)
+  (docComment)
+] @injection.content
+  (#set! injection.language "comment"))