using pest

src/wyst.pest

@@ -0,0 +1,58 @@
+WHITESPACE = _{ " " | "\t" | "\n" }
+
+// [literals]
+round = { "(" ~ (expr)* ~ ")" }
+curly = { "{" ~ (code_expr)* ~ "}" }
+escape = { "\\" ~ ANY }
+raw_string = { (!("\\" | "\"") ~ ANY)+ }
+string = { "\"" ~ (raw_string | escape )* ~ "\"" }
+char = { "'" ~ (escape | ANY) ~ "'" }
+bool = @{"true" | "false"}
+semicolon = {";"}
+
+// [numbers]
+hex = @{ "0" ~ ("x"|"X") ~ ('0'..'9' | 'a'..'f' | 'A'..'F')*}
+float = @{ ('0'..'9')* ~ "." ~ ('0'..'9')+ }
+int = @{ '0'..'9'+ }
+
+// [identifiers]
+identifier = @{ !(hex|float|int) ~ ("_" | 'a'..'z' | 'a'..'z') ~ ( "_" | 'a'..'z' | 'a'..'z' | int )* }
+
+// [definitions]
+var_def = { identifier ~ identifier }
+var_def_set = { var_def ~ "=" ~ expr ~ semicolon }
+func_def = { identifier ~ identifier ~ round ~ curly }
+
+expr = {(
+    round |
+    curly |
+    char |
+    hex |
+    float |
+    int |
+    bool |
+    identifier |
+    string |
+    semicolon
+)+}
+
+code_expr = {(
+    round |
+    curly |
+    char |
+    var_def_set |
+    (var_def ~ semicolon) |
+    hex |
+    float |
+    int |
+    bool |
+    // identifier |
+    string |
+    semicolon
+)+}
+
+top_expr = {
+    (
+        func_def
+    )+
+}