Add flag to stop compilation

src/errors.pr

@@ -4,6 +4,7 @@ import compiler
 import map
 import parser
 import progress
+import toolchain
 
 export var error_count = 0
 export var suppress_errors = false
@@ -120,6 +121,10 @@ export def errorn(node: &parser::Node, msg: String...) {
         message = message
     ] !Diagnostic
     error_handler(diagnostic)
+
+    if toolchain::exit_on_first_error {
+        abort("Compilation failure\n")
+    }
 }
 
 export def errort(token: lexer::Token, state: &parser::ParseState, msg: String...) {
@@ -150,5 +155,9 @@ export def errort(token: lexer::Token, state: &parser::ParseState, msg: String..
     ] !Diagnostic
     error_handler(diagnostic)
 
+    if toolchain::exit_on_first_error {
+        abort("Compilation failure\n")
+    }
+
     state.has_error = true
 }

src/main.pr

@@ -90,6 +90,8 @@ let options = [
         .set_help("Compile without importing std")),
     (option(*toolchain::trace_consteval, "--trace-consteval")
         .set_help("Trace code generated for consteval")),
+    (option(*toolchain::exit_on_first_error, "--exit-on-first-error")
+        .set_help("Abort compilation on first error")),
     (option(*filename, "compile")
         .set_help("File to compile")
         .set_metavar("FILE"))

src/toolchain.pr

@@ -121,6 +121,7 @@ export var print_typed_ast = false
 export var emit_only_functions = false
 export var emit_all_modules = false
 export var continue_on_output = false
+export var exit_on_first_error = false
 // This flag controls emitting debug information to llvm
 export var debug_sym = false
 export var main_file_name: Str