Compiler/AST interpreter: Difference between revisions

Content added Content deleted
m (J: include an implementation of 'error' (so that an error would display the error message before erroring out))
(J: Putc becomes Prtc (see syntax analyzer talk page))
Line 1,701: Line 1,701:
Implementation:
Implementation:


<lang J>error=: {{echo y throw.}}
<lang J>outbuf=: ''
outbuf=: ''
emit=:{{
emit=:{{
outbuf=: outbuf,y
outbuf=: outbuf,y
Line 1,758: Line 1,757:
case.'If'do.if.interp V do.interp left W else.interp right W end.''
case.'If'do.if.interp V do.interp left W else.interp right W end.''
case.'While'do.while.interp V do.interp W end.''
case.'While'do.while.interp V do.interp W end.''
case.'Putc'do.emit u:interp V
case.'Prtc'do.emit u:interp V
case.'Prti'do.emit rplc&'_-'":interp V
case.'Prti'do.emit rplc&'_-'":interp V
case.'Prts'do.emit interp V
case.'Prts'do.emit interp V
Line 1,766: Line 1,765:
''
''
case.do.error'unknown node type ',typ y
case.do.error'unknown node type ',typ y
end.
}}

ast_interp=: {{
outbuf=:''
interp load_ast y
if.#outbuf do.
echo outbuf
outbuf=:''
end.
end.
}}
}}
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