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checker: optimise out needless string interpolations from the most common case in Checker.expr_or_block_err

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Delyan Angelov 2023-08-31 00:34:07 +03:00
parent 803001edaa
commit 55575fd7bd
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1 changed files with 12 additions and 3 deletions
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15
vlib/v/checker/checker.v
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@ -1064,23 +1064,32 @@ fn (mut c Checker) type_implements(typ ast.Type, interface_type ast.Type, pos to
return true
}
fn (mut c Checker) expr_or_block_err(kind ast.OrKind, expr_name string, pos token.Pos, is_field bool) {
obj_does_not_return_or_is_not := if is_field {
// helper for expr_or_block_err
fn is_field_to_description(expr_name string, is_field bool) string {
return if is_field {
'field `${expr_name}` is not'
} else {
'function `${expr_name}` does not return'
}
}
fn (mut c Checker) expr_or_block_err(kind ast.OrKind, expr_name string, pos token.Pos, is_field bool) {
match kind {
.absent {}
.absent {
// do nothing, most common case; do not be tempted to move the call to is_field_to_description above it, since that will slow it down
}
.block {
obj_does_not_return_or_is_not := is_field_to_description(expr_name, is_field)
c.error('unexpected `or` block, the ${obj_does_not_return_or_is_not} an Option or a Result',
pos)
}
.propagate_option {
obj_does_not_return_or_is_not := is_field_to_description(expr_name, is_field)
c.error('unexpected `?`, the ${obj_does_not_return_or_is_not} an Option',
pos)
}
.propagate_result {
obj_does_not_return_or_is_not := is_field_to_description(expr_name, is_field)
c.error('unexpected `!`, the ${obj_does_not_return_or_is_not} a Result', pos)
}
}