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checker: set expected_type in several places

pull/3884/head
Alexander Medvednikov 2020-02-29 18:25:38 +01:00
parent 27ce38937c
commit a15dcbfb2d
2 changed files with 22 additions and 16 deletions
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21
vlib/v/checker/checker.v
View File

@ -16,12 +16,13 @@ const (
)
pub struct Checker {
table &table.Table
table &table.Table
mut:
file ast.File
nr_errors int
errors []string
expected_type table.Type
file ast.File
nr_errors int
errors []string
expected_type table.Type
fn_return_type table.Type // current function's return type
}
pub fn new_checker(table &table.Table) Checker {
@ -108,6 +109,7 @@ pub fn (c mut Checker) check_struct_init(struct_init ast.StructInit) table.Type
if !found_field {
c.error('struct init: no such field `$field_name` for struct `$typ_sym.name`', struct_init.pos)
}
c.expected_type = field.typ
expr_type := c.expr(expr)
expr_type_sym := c.table.get_type_symbol(expr_type)
field_type_sym := c.table.get_type_symbol(field.typ)
@ -124,6 +126,7 @@ pub fn (c mut Checker) check_struct_init(struct_init ast.StructInit) table.Type
pub fn (c mut Checker) infix_expr(infix_expr ast.InfixExpr) table.Type {
// println('checker: infix expr(op $infix_expr.op.str())')
left_type := c.expr(infix_expr.left)
c.expected_type = left_type
right_type := c.expr(infix_expr.right)
if !c.table.check(right_type, left_type) {
left := c.table.get_type_symbol(left_type)
@ -279,6 +282,7 @@ pub fn (c mut Checker) selector_expr(selector_expr ast.SelectorExpr) table.Type
// TODO: non deferred
pub fn (c mut Checker) return_stmt(return_stmt ast.Return) {
mut got_types := []table.Type
c.expected_type = c.fn_return_type
if return_stmt.exprs.len == 0 {
return
}
@ -367,6 +371,7 @@ fn (c mut Checker) stmt(node ast.Stmt) {
// c.expected_type = table.void_type
match mut node {
ast.FnDecl {
c.fn_return_type = it.typ
for stmt in it.stmts {
c.stmt(stmt)
}
@ -605,6 +610,7 @@ pub fn (c mut Checker) match_expr(node mut ast.MatchExpr) table.Type {
for i, block in node.blocks {
if i < node.match_exprs.len {
match_expr := node.match_exprs[i]
c.expected_type = node.typ
c.expr(match_expr)
}
for stmt in block.stmts {
@ -738,10 +744,13 @@ pub fn (c mut Checker) index_expr(node ast.IndexExpr) table.Type {
// If a short form is used, `expected_type` needs to be an enum
// with this value.
pub fn (c mut Checker) enum_val(node ast.EnumVal) table.Type {
// println('checker: enum: $node.enum_name')
typ_idx := if node.enum_name == '' { c.expected_type } else { //
c.table.find_type_idx(node.enum_name) }
typ := c.table.get_type_symbol(table.Type(typ_idx))
// println('checker: enum_val: $node.enum_name typeidx=$typ_idx tname=$typ.name')
if typ.kind != .enum_ {
c.error('not an enum', node.pos)
}
// info := typ.info as table.Enum
info := typ.enum_info()
// rintln('checker: x = $info.x enum val $c.expected_type $typ.name')

15
vlib/v/scanner/scanner_test.v
View File

@ -9,7 +9,7 @@ import (
fn test_scan() {
text := 'println(2 + 3)'
mut scanner := new_scanner(text)
mut scanner := new_scanner(text, .skip_comments)
mut token_kinds := []token.Kind
for {
tok := scanner.scan()
@ -25,17 +25,15 @@ fn test_scan() {
assert token_kinds[3] == .plus
assert token_kinds[4] == .number
assert token_kinds[5] == .rpar
// test number costants input format
mut c := 0xa_0
mut c := 0xa0
assert c == 0xa0
c = 0b10_01
c = 0b1001
assert c == 9
c = 1_000_000
c = 1000000
assert c == 1000000
// test float conversion and reading
d := f64(23_000_000e-3)
d := f64(23000000e-3)
assert int(d) == 23000
mut e := f64(1.2E3) * f64(-1e-1)
assert e == -120.0
@ -43,6 +41,5 @@ fn test_scan() {
assert e == 120.0
assert 1.23e+10 == 1.23e10
assert 1.23e+10 == 1.23e0010
assert -1.23e+10 == 1.23e0010*-1.0
assert -1.23e+10 == 1.23e0010 * -1.0
}