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v.eval: support panic function (#14972)

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StunxFS 2022-07-07 13:00:59 -04:00 committed by GitHub
parent 6b597a4b58
commit 9376009c39
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 27 additions and 6 deletions
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33
vlib/v/eval/eval.v
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@ -3,6 +3,7 @@
// that can be found in the LICENSE file.
module eval
import os
import v.ast
import v.pref
import v.util
@ -66,7 +67,7 @@ pub fn (mut e Eval) run_func(func ast.FnDecl, _args ...Object) {
e.error('mismatched parameter length for $func.name: got `$args.len`, expected `$func.params.len`')
}
if func.name in ['print', 'println', 'eprint', 'eprintln'] {
if func.name in ['print', 'println', 'eprint', 'eprintln', 'panic'] {
s := args[0].string() // stringify because println accepts anything as argument
match func.name {
'print' {
@ -81,6 +82,9 @@ pub fn (mut e Eval) run_func(func ast.FnDecl, _args ...Object) {
'eprintln' {
eprintln(s)
}
'panic' {
e.panic(s)
}
else {}
}
} else {
@ -222,10 +226,27 @@ pub fn (mut e Eval) register_symbol(stmt ast.Stmt, mod string, file string) {
fn (e Eval) error(msg string) {
eprintln('> V interpeter backtrace:')
for t in e.back_trace {
file_path := e.trace_file_paths[t.file_idx] or { t.file_idx.str() }
fn_name := e.trace_function_names[t.fn_idx] or { t.fn_idx.str() }
eprintln(' $file_path:${t.line + 1}:$fn_name}')
}
e.print_backtrace()
util.verror('interpreter', msg)
}
fn (e Eval) panic(s string) {
eprintln('V panic: $s')
eprintln('V hash: ${@VHASH}')
e.print_backtrace()
exit(1)
}
fn (e Eval) print_backtrace() {
for i := e.back_trace.len - 1; i >= 0; i-- {
t := e.back_trace[i]
file_path := if path := e.trace_file_paths[t.file_idx] {
os.real_path(path)
} else {
t.file_idx.str()
}
fn_name := e.trace_function_names[t.fn_idx] or { t.fn_idx.str() }
word := if i == e.back_trace.len - 1 { 'at' } else { 'by' }
eprintln('$file_path:${t.line + 1}: $word $fn_name')
}
}