vrepl: fix array_filter (#9104)

cmd/tools/vrepl.v

@@ -29,6 +29,7 @@ mut:
 const is_stdin_a_pipe = (is_atty(0) == 0)
 
 const vexe = os.getenv('VEXE')
+
 const vstartup = os.getenv('VSTARTUP')
 
 fn new_repl() Repl {
@@ -118,7 +119,11 @@ fn run_repl(workdir string, vrepl_prefix string) {
 	}
 
 	if vstartup != '' {
-		result := repl_run_vfile(vstartup) or { os.Result{output: '$vstartup file not found'} }
+		result := repl_run_vfile(vstartup) or {
+			os.Result{
+				output: '$vstartup file not found'
+			}
+		}
 		print('\n')
 		print_output(result)
 	}
@@ -214,7 +219,6 @@ fn run_repl(workdir string, vrepl_prefix string) {
 			filter_line := r.line.replace(r.line.find_between("'", "'"), '').replace(r.line.find_between('"',
 				'"'), '')
 			possible_statement_patterns := [
-				'=',
 				'++',
 				'--',
 				'<<',
@@ -229,7 +233,6 @@ fn run_repl(workdir string, vrepl_prefix string) {
 				'interface ',
 				'import ',
 				'#include ',
-				':=',
 				'for ',
 				'or ',
 				'insert',
@@ -240,12 +243,16 @@ fn run_repl(workdir string, vrepl_prefix string) {
 				'trim',
 			]
 			mut is_statement := false
+			if filter_line.count('=') % 2 == 1 {
+				is_statement = true
+			} else {
 				for pattern in possible_statement_patterns {
 					if filter_line.contains(pattern) {
 						is_statement = true
 						break
 					}
 				}
+			}
 			// NB: starting a line with 2 spaces escapes the println heuristic
 			if oline.starts_with('  ') {
 				is_statement = true

vlib/v/tests/repl/array_filter.repl

@@ -0,0 +1,3 @@
+[1, 2, 3, 4].filter(it%2 == 0).map(it * 2)
+===output===
+[4, 8]