parser: allow for variable name using keyword 'type'

[yuyi98]

This PR allow for variable name using keyword 'type'.

• Allow for variable name using keyword 'type'.
• Add test.

fn info(type int) int {
	return type
}

fn print_info() {
	for type in [1, 2, 3] {
		println(type)
	}
}

fn main() {
	ret := info(22)
	println(ret)
	assert ret == 22

	type := 33
	println(type)
	assert type == 33

	print_info()
	assert true
}

PS D:\Test\v\tt1> v run .    
22
33
1
2
3

[StunxFS]

Why not just use .v?

ident := p.ident(.v)

[yuyi98]

It is currently only used in v.

[medvednikov]

he meant using p.ident(.v) instead of p.ident(ast.Language.v)

indeed that's simpler and I thought vfmt simplified it already

[yuyi98]

I see.
Yes, it can. Thank you!