add fortran language (#3025)

5 files changed, 224 insertions, 0 deletions

diff --git a/book/src/generated/lang-support.md b/book/src/generated/lang-support.md
index 85e42b15..085d92a8 100644
--- a/book/src/generated/lang-support.md
+++ b/book/src/generated/lang-support.md
@@ -22,6 +22,7 @@
 | erb | ✓ |  |  |  |
 | erlang | ✓ | ✓ |  | `erlang_ls` |
 | fish | ✓ | ✓ | ✓ |  |
+| fortran | ✓ |  | ✓ | `fortls` |
 | gdscript | ✓ |  | ✓ |  |
 | git-attributes | ✓ |  |  |  |
 | git-commit | ✓ |  |  |  |
diff --git a/languages.toml b/languages.toml
index 56abf3f8..3be20ab3 100644
--- a/languages.toml
+++ b/languages.toml
@@ -1514,3 +1514,17 @@ roots = []
 comment-token = "--"
 indent = { tab-width = 2, unit = "  " }
 language-server = { command = "idris2-lsp" }
+
+[[language]]
+name = "fortran"
+scope = "source.fortran"
+injection-regex = "fortran"
+file-types = ["f", "for", "f90", "f95", "f03"]
+roots = ["fpm.toml"]
+comment-token = "!"
+indent = { tab-width = 4, unit = "    "}
+language-server = { command = "fortls", args = ["--lowercase_intrinsics"] }
+
+[[grammar]]
+name = "fortran"
+source = { git = "https://github.com/stadelmanma/tree-sitter-fortran", rev = "f0f2f100952a353e64e26b0fa710b4c296d7af13" }
\ No newline at end of file
diff --git a/runtime/queries/fortran/folds.scm b/runtime/queries/fortran/folds.scm
new file mode 100644
index 00000000..f62d9dd7
--- /dev/null
+++ b/runtime/queries/fortran/folds.scm
@@ -0,0 +1,11 @@
+;; by @oponkork
+[
+ (if_statement)
+ (where_statement)
+ (enum_statement)
+ (do_loop_statement)
+ (derived_type_definition)
+ (function)
+ (subroutine)
+ (interface)
+] @fold
\ No newline at end of file
diff --git a/runtime/queries/fortran/highlights.scm b/runtime/queries/fortran/highlights.scm
new file mode 100644
index 00000000..90f4ecd0
--- /dev/null
+++ b/runtime/queries/fortran/highlights.scm
@@ -0,0 +1,171 @@
+[
+  (intrinsic_type)
+  "dimension"
+  "intent"
+  "in"
+  "out"
+  "inout"
+  "type"
+  "endtype"
+  "attributes"
+  "global"
+  "device"
+  "host"
+  "grid_global"
+  "pointer"
+] @keyword.storage.modifier
+
+[
+  "contains"
+  "public"
+  "private"
+] @keyword.directive
+
+[
+"implicit"
+(none)
+] @attribute
+
+[
+  "function"
+  "endfunction"
+  "endprogram"
+  "subroutine"
+  "endsubroutine"
+] @keyword.storage
+
+[
+  "module"
+  "endmodule"
+  "bind"
+  "call"
+  "class"
+  "continue"
+  "cycle"
+  "enumerator"
+  "equivalence"
+  "exit"
+  "format"
+  "goto"
+  "include"
+  "interface"
+  "endinterface"
+  "only"
+  "parameter"
+  "procedure"
+  "print"
+  "program"
+  "endprogram"
+  "read"
+  "return"
+  "result"
+  "stop"
+  "use"
+  "write"
+  "enum"
+  "endenum"
+  (default)
+  (procedure_qualifier)
+] @keyword
+
+[
+  "if" 
+  "then"
+  "else"
+  "elseif"
+  "endif"
+  "where"
+  "endwhere"
+] @keyword.control.conditional
+
+[
+  "do"
+  "enddo"
+  "while"
+  "forall"
+] @keyword.control.repeat
+
+[
+  "*"
+  "**"
+  "+"
+  "-"
+  "/"
+  "="
+  "<"
+  ">"
+  "<="
+  ">="
+  "=="
+  "/="
+] @operator
+
+[
+  "\\.and\\."
+  "\\.or\\."
+  "\\.lt\\."
+  "\\.gt\\."
+  "\\.ge\\."
+  "\\.le\\."
+  "\\.eq\\."
+  "\\.eqv\\."
+  "\\.neqv\\."
+] @keyword.operator
+
+ ;; Brackets
+ [
+  "("
+  ")"
+  "["
+  "]"
+ ] @punctuation.bracket
+
+ ;; Delimiter
+ [
+  "::"
+  ","
+  "%"
+ ] @punctuation.delimiter
+
+(parameters
+  (identifier) @variable.parameter)
+
+(program_statement
+  (name) @namespace)
+
+(module_statement
+  (name) @namespace)
+
+(function_statement
+  (name) @function)
+
+(subroutine_statement
+  (name) @function)
+
+(end_program_statement
+  (name) @namespace)
+
+(end_module_statement
+  (name) @namespace)
+
+(end_function_statement
+  (name) @function)
+
+(end_subroutine_statement
+  (name) @function)
+
+(subroutine_call
+	(name) @function)
+
+(keyword_argument
+  name: (identifier) @keyword)
+
+(derived_type_member_expression
+  (type_member) @variable.other.member)
+
+(identifier) @variable
+(string_literal) @string
+(number_literal) @constant.numeric
+(boolean_literal) @constant.builtin.boolean
+(comment) @comment
+
diff --git a/runtime/queries/fortran/indents.scm b/runtime/queries/fortran/indents.scm
new file mode 100644
index 00000000..daa8bac1
--- /dev/null
+++ b/runtime/queries/fortran/indents.scm
@@ -0,0 +1,27 @@
+[
+  (module)
+  (program)
+  (subroutine)
+  (function)
+  ; (interface)
+  (if_statement)
+  (do_loop_statement)
+  (where_statement)
+  (derived_type_definition)
+  (enum)
+] @indent
+
+[
+  (end_module_statement)
+  (end_program_statement)
+  (end_subroutine_statement)
+  (end_function_statement)
+  ; (end_interface_statement)
+  (end_if_statement)
+  (end_do_loop_statement)
+  (else_clause)
+  (elseif_clause)
+  (end_type_statement)
+  (end_enum_statement)
+  (end_where_statement)
+] @outdent
\ No newline at end of file