def glsl_parse_tokenized(source):
"""Parse tokenized source."""
# End of input.
if not source:
return []
# Try default parses for global scope.
(block, remaining) = glsl_parse_inout(source)
if block:
return [block] + glsl_parse_tokenized(remaining)
(block, remaining) = glsl_parse_struct(source)
if block:
return [block] + glsl_parse_tokenized(remaining)
(block, remaining) = glsl_parse_pervertex(source)
if block:
return [block] + glsl_parse_tokenized(remaining)
(block, remaining) = glsl_parse_uniform(source)
if block:
return [block] + glsl_parse_tokenized(remaining)
(block, remaining) = glsl_parse_function(source)
if block:
return [block] + glsl_parse_tokenized(remaining)
# Try parses normally for local scope.
(block, remaining) = glsl_parse_declaration(source)
if block:
return [block] + glsl_parse_tokenized(remaining)
(block, remaining) = glsl_parse_assignment(source)
if block:
return [block] + glsl_parse_tokenized(remaining)
# Fallback, should never happen.
return glsl_parse_default(source)
def glsl_parse_parameter(source):
"""Parse parameter block."""
(inout, typeid, content) = extract_tokens(source, ("?o", "?t"))
if not inout:
(typeid, content) = extract_tokens(source, ("?t"))
if not typeid:
return (None, source)
(assignment, remaining) = glsl_parse_assignment(content, False)
if not assignment:
raise RuntimeError("could not parse assignment from '%s'" % (str(map(str, content))))
if inout and (not inout.format(False) in ("in", "inout", "out")):
raise RuntimeError("invalid inout directive for parameter: '%s'" % (inout.format(False)))
return (GlslBlockParameter(inout, typeid, assignment), remaining)
def glsl_parse_scope(source, explicit=True):
"""Parse scope block."""
(content, remaining) = extract_tokens(source, ("?{",))
if not (content is None):
return (GlslBlockScope(glsl_parse_content(content), explicit), remaining)
# If explicit scope is not expected, try legal one-statement scopes.
elif not explicit:
(block, remaining) = glsl_parse_flow(source)
if block:
return (GlslBlockScope([block], explicit), remaining)
(block, remaining) = glsl_parse_unary(source)
if block:
return (GlslBlockScope([block], explicit), remaining)
(block, remaining) = glsl_parse_assignment(source)
if block:
return (GlslBlockScope([block], explicit), remaining)
# No scope found.
return (None, source)
def glsl_parse_declaration(source):
"""Parse declaration block."""
(typeid, content) = extract_tokens(source, ("?t", ))
if not typeid:
return (None, source)
# Loop until nothing found.
lst = []
while True:
(assignment, remaining) = glsl_parse_assignment(content)
if assignment:
lst += [assignment]
# Might have been last assignement.
if assignment.getTerminator() == ";":
return (GlslBlockDeclaration(typeid, lst), remaining)
# Otherwise keep going.
content = remaining
continue
# Unknown element, not a valid declaration.
return (None, source)
def glsl_parse_scope(source, explicit=True):
"""Parse scope block."""
(content, remaining) = extract_tokens(source, ("?{", ))
if not (content is None):
return (GlslBlockScope(glsl_parse_content(content),
explicit), remaining)
# If explicit scope is not expected, try legal one-statement scopes.
elif not explicit:
(block, remaining) = glsl_parse_flow(source)
if block:
return (GlslBlockScope([block], explicit), remaining)
(block, remaining) = glsl_parse_unary(source)
if block:
return (GlslBlockScope([block], explicit), remaining)
(block, remaining) = glsl_parse_assignment(source)
if block:
return (GlslBlockScope([block], explicit), remaining)
# No scope found.
return (None, source)
def glsl_parse_declaration(source):
"""Parse declaration block."""
(typeid, content) = extract_tokens(source, ("?t",))
if not typeid:
return (None, source)
# Loop until nothing found.
lst = []
while True:
(assignment, remaining) = glsl_parse_assignment(content)
if assignment:
lst += [assignment]
# Might have been last assignement.
if assignment.getTerminator() == ";":
return (GlslBlockDeclaration(typeid, lst), remaining)
# Otherwise keep going.
content = remaining
continue
# Unknown element, not a valid declaration.
return (None, source)