Added untested interface section parsing

pull/7/head
Sasha Koshka 5 months ago
parent 441b036a1c
commit 4eac5c67aa

@ -0,0 +1,130 @@
package parser
import "git.tebibyte.media/sashakoshka/arf/types"
import "git.tebibyte.media/sashakoshka/arf/lexer"
import "git.tebibyte.media/sashakoshka/arf/infoerr"
// parseFaceSection parses an interface section.
func (parser *ParsingOperation) parseFaceSection () (
section *FaceSection,
err error,
) {
err = parser.expect(lexer.TokenKindName)
if err != nil { return }
section = &FaceSection {
location: parser.token.Location(),
behaviors: make(map[string] FaceBehavior),
}
// get permission
err = parser.nextToken(lexer.TokenKindPermission)
if err != nil { return }
section.permission = parser.token.Value().(types.Permission)
// get name
err = parser.nextToken(lexer.TokenKindName)
if err != nil { return }
section.name = parser.token.Value().(string)
// parse inherited interface
err = parser.nextToken(lexer.TokenKindColon)
if err != nil { return }
err = parser.nextToken(lexer.TokenKindName)
if err != nil { return }
section.inherits = parser.token.Value().(string)
if err != nil { return }
err = parser.expect(lexer.TokenKindNewline)
if err != nil { return }
err = parser.nextToken()
if err != nil { return }
// parse members
for {
// if we've left the block, stop parsing
if !parser.token.Is(lexer.TokenKindIndent) { return }
if parser.token.Value().(int) != 1 { return }
// parse behavior
err = parser.nextToken(lexer.TokenKindName)
if err != nil { return }
behaviorBeginning := parser.token.Location()
var behavior FaceBehavior
behavior, err = parser.parseFaceBehavior()
// add to section
_, exists := section.behaviors[behavior.name]
if exists {
err = infoerr.NewError (
behaviorBeginning,
"multiple behaviors named " + behavior.name +
" in this interface",
infoerr.ErrorKindError)
return
}
if err != nil { return }
}
return
}
// parseFaceBehavior parses a single interface behavior. Indentation level is
// assumed.
func (parser *ParsingOperation) parseFaceBehavior () (
behavior FaceBehavior,
err error,
) {
// get name
err = parser.nextToken(lexer.TokenKindName)
if err != nil { return }
behavior.name = parser.token.Value().(string)
for {
err = parser.nextToken(lexer.TokenKindNewline)
if err != nil { return }
// if we've left the block, stop parsing
err = parser.nextToken()
if err != nil { return }
if !parser.token.Is(lexer.TokenKindIndent) { return }
if parser.token.Value().(int) != 2 { return }
// get preceding symbol
err = parser.nextToken (
lexer.TokenKindGreaterThan,
lexer.TokenKindLessThan)
if err != nil { return }
kind := parser.token.Kind()
var declaration Declaration
// get name
err = parser.nextToken(lexer.TokenKindName)
if err != nil { return }
declaration.name = parser.token.Value().(string)
// parse inherited type
err = parser.nextToken(lexer.TokenKindColon)
if err != nil { return }
err = parser.nextToken()
if err != nil { return }
declaration.what, err = parser.parseType()
if err != nil { return }
err = parser.expect(lexer.TokenKindNewline)
if err != nil { return }
err = parser.nextToken()
if err != nil { return }
if kind == lexer.TokenKindGreaterThan {
behavior.inputs = append (
behavior.inputs,
declaration)
} else {
behavior.inputs = append (
behavior.inputs,
declaration)
}
}
return
}