// inverseChain : openInverseChain program inverseChain?
// | inverseAndProgram
func (p *parser) parseInverseChain() *ast.Program {
if p.isInverse() {
// inverseAndProgram
return p.parseInverseAndProgram()
} else {
result := ast.NewProgram(p.lex.Pos(), p.lex.Line())
// openInverseChain
block, blockParams := p.parseOpenBlock()
// program
program := p.parseProgram()
program.BlockParams = blockParams
block.Program = program
// inverseChain?
if p.isInverseChain() {
block.Inverse = p.parseInverseChain()
}
setBlockInverseStrip(block)
result.Chained = true
result.AddStatement(block)
return result
}
}
// program : statement*
func (p *parser) parseProgram() *ast.Program {
result := ast.NewProgram(p.lex.Pos(), p.lex.Line())
for p.isStatement() {
result.AddStatement(p.parseStatement())
}
return result
}
// rawBlock : openRawBlock content endRawBlock
// openRawBlock : OPEN_RAW_BLOCK helperName param* hash? CLOSE_RAW_BLOCK
// endRawBlock : OPEN_END_RAW_BLOCK helperName CLOSE_RAW_BLOCK
func (p *parser) parseRawBlock() *ast.BlockStatement {
// OPEN_RAW_BLOCK
tok := p.shift()
result := ast.NewBlockStatement(tok.Pos, tok.Line)
// helperName param* hash?
result.Expression = p.parseExpression(tok)
openName := result.Expression.Canonical()
// CLOSE_RAW_BLOCK
tok = p.shift()
if tok.Kind != lexer.TokenCloseRawBlock {
errExpected(lexer.TokenCloseRawBlock, tok)
}
// content
// @todo Is content mandatory in a raw block ?
content := p.parseContent()
program := ast.NewProgram(tok.Pos, tok.Line)
program.AddStatement(content)
result.Program = program
// OPEN_END_RAW_BLOCK
tok = p.shift()
if tok.Kind != lexer.TokenOpenEndRawBlock {
// should never happen as it is caught by lexer
errExpected(lexer.TokenOpenEndRawBlock, tok)
}
// helperName
endId := p.parseHelperName()
closeName, ok := ast.HelperNameStr(endId)
if !ok {
errNode(endId, "Erroneous closing expression")
}
if openName != closeName {
errNode(endId, fmt.Sprintf("%s doesn't match %s", openName, closeName))
}
// CLOSE_RAW_BLOCK
tok = p.shift()
if tok.Kind != lexer.TokenCloseRawBlock {
errExpected(lexer.TokenCloseRawBlock, tok)
}
return result
}