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check integer const overflow at compilation

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This commit is contained in:
Alexander Medvednikov 2019-07-10 16:05:39 +02:00
parent 69d2db0f1e
commit 3d4cd0bbc0
4 changed files with 45 additions and 2 deletions
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8
compiler/parser.v
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@ -1994,6 +1994,9 @@ fn (p mut Parser) factor() string {
typ = 'f32'
// typ = 'f64' // TODO
}
if p.expected_type != '' && !is_valid_int_const(p.lit, p.expected_type) {
p.error('constant `$p.lit` overflows `$p.expected_type`')
}
p.gen(p.lit)
p.fgen(p.lit)
case Token.minus:
@ -2252,7 +2255,7 @@ fn (p mut Parser) string_expr() {
// '$age'! means the user wants this to be a tmp string (uses global buffer, no allocation,
// won't be used again)
if p.tok == .not {
p.next()
p.check(.not)
p.gen('_STR_TMP($format$args)')
}
else {
@ -2550,7 +2553,9 @@ fn (p mut Parser) cast(typ string) string {
p.next()
}
p.check(.lpar)
p.expected_type = typ
expr_typ := p.bool_expression()
p.expected_type = ''
p.check(.rpar)
// `string(buffer)` => `tos2(buffer)`
if typ == 'string' && (expr_typ == 'byte*' || expr_typ == 'byteptr') {
@ -2562,7 +2567,6 @@ fn (p mut Parser) cast(typ string) string {
}
else {
p.cgen.set_placeholder(pos, '($typ)(')
// p.fgen(typ)
}
p.gen(')')
return typ