Merge branch 'moonbitlang:main' into as-iter

Author: ZnPdCo

json/internal_types.mbt

@@ -0,0 +1,88 @@
+// Copyright 2024 International Digital Economy Academy
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+priv struct ParseContext {
+  mut offset : Int
+  input : String
+  end_offset : Int
+}
+
+fn ParseContext::make(input : String) -> ParseContext {
+  { offset: 0, input, end_offset: input.length() }
+}
+
+priv type CharClass Array[(Char, Char)]
+
+fn CharClass::from_array(array : Array[(Char, Char)]) -> CharClass {
+  CharClass(array)
+}
+
+fn contains(self : CharClass, c : Char) -> Bool {
+  for left = 0, right = self.0.length(); left < right; {
+    let middle = (left + right) / 2
+    let (min, max) = self.0[middle]
+    if c < min {
+      continue left, middle
+    } else if c > max {
+      continue middle + 1, right
+    } else {
+      break true
+    }
+  } else {
+    false
+  }
+}
+
+priv enum Token {
+  Null
+  True
+  False
+  Number(Double)
+  String(String)
+  LBrace
+  RBrace
+  LBracket
+  RBracket
+  Comma
+  Colon
+} derive(Eq, Debug, Show)
+
+priv struct StringBuilder {
+  mut buffer : String
+}
+
+fn StringBuilder::make() -> StringBuilder {
+  { buffer: "" }
+}
+
+fn add_string(self : StringBuilder, s : String) -> Unit {
+  self.buffer = self.buffer + s
+}
+
+fn add_substring(
+  self : StringBuilder,
+  s : String,
+  start : Int,
+  end : Int
+) -> Unit {
+  self.buffer = self.buffer + s.substring(~start, ~end)
+}
+
+fn add_char(self : StringBuilder, c : Char) -> Unit {
+  self.buffer = self.buffer + c.to_string()
+}
+
+fn to_string(self : StringBuilder) -> String {
+  self.buffer
+}