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parser: clean up submodule implementation a bit

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This commit is contained in:
Alexander Medvednikov 2019-07-10 09:02:04 +02:00
parent 87762d6cf3
commit 68228f9977
1 changed files with 11 additions and 10 deletions
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25
compiler/parser.v
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@ -71,6 +71,10 @@ const (
MainFn= &Fn{name:'main'} MainFn= &Fn{name:'main'}
) )
const (
MaxModuleDepth = 4
)
fn (c mut V) new_parser(path string, run Pass) Parser { fn (c mut V) new_parser(path string, run Pass) Parser {
c.log('new_parser("$path")') c.log('new_parser("$path")')
c.cgen.run = run c.cgen.run = run
@ -296,20 +300,17 @@ fn (p mut Parser) import_statement() {
} }
mut pkg := p.lit.trim_space() mut pkg := p.lit.trim_space()
// submodule support // submodule support
// limit depth to 4 for now
max_module_depth := 4
mut depth := 1 mut depth := 1
for p.peek() == .dot {
p.next() // SKIP DOT
p.next() // SUBMODULE
submodule := p.lit.trim_space()
pkg = pkg + '.' + submodule
depth++
if depth > max_module_depth {
panic('Sorry. Module depth of $max_module_depth exceeded: $pkg ($submodule is too deep).')
}
}
p.next() p.next()
for p.tok == .dot {
p.check(.dot)
submodule := p.check_name()
pkg += '.' + submodule
depth++
if depth > MaxModuleDepth {
p.error('module depth of $MaxModuleDepth exceeded: $pkg')
}
}
p.fgenln(' ' + pkg) p.fgenln(' ' + pkg)
// Make sure there are no duplicate imports // Make sure there are no duplicate imports
if p.table.imports.contains(pkg) { if p.table.imports.contains(pkg) {