forked from mirrors/gecko-dev
cdb4fe1fcb
This is another incremental update of wgpu and WebGPU APIs. It increases stability and makes us run most of the Austin's samples (again). Likely fixes https://bugzilla.mozilla.org/show_bug.cgi?id=1704148 Differential Revision: https://phabricator.services.mozilla.com/D112828
59 lines
1.4 KiB
Python
Executable file
59 lines
1.4 KiB
Python
Executable file
#!/usr/bin/env python
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"""js.py - Repl-like toy to explore parsing of lines of JS.
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See README.md for instructions.
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"""
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import argparse
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import traceback
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from .lexer import JSLexer
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from .parser import JSParser
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from jsparagus.lexer import SyntaxError
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def interactive_input(lexer, prompt="js> "):
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while True:
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line = input(prompt)
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lexer.write(line + "\n")
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if lexer.can_close():
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return lexer.close()
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prompt = "..> "
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def rpl():
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"""Read-print loop."""
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while True:
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parser = JSLexer(JSParser(), filename="<stdin>")
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try:
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result = interactive_input(parser)
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except EOFError:
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print()
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break
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except SyntaxError:
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traceback.print_exc(limit=0)
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continue
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print(result)
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def main():
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parser = argparse.ArgumentParser(description="Try out the JS parser.")
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parser.add_argument('input_file', metavar='FILE', nargs='?',
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help=".js file to parse")
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options = parser.parse_args()
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if options.input_file is not None:
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with open(options.input_file) as f:
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source = f.readlines()
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lexer = JSLexer(JSParser())
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for line in source:
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print(line.rstrip())
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lexer.write(line)
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ast = lexer.close()
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print(ast)
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else:
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rpl()
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if __name__ == '__main__':
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main()
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