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selfhost: add ternary parser and plugin prefix guard

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Selfhosting Dev
2025-09-16 17:38:22 +09:00
parent fce0d2cdef
commit fa1619bf4b
9 changed files with 221 additions and 45 deletions
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32
apps/selfhost-compiler/boxes/parser_box.nyash
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@ -402,7 +402,37 @@ box ParserBox {
parse_term2(src, i) { local lhs = me.parse_unary2(src, i) local j = me.gpos_get() local cont = 1 loop(cont == 1) { j = me.skip_ws(src, j) if j >= src.length() { cont = 0 } else { local op = src.substring(j, j+1) if op != "*" && op != "/" { cont = 0 } else { local rhs = me.parse_unary2(src, j+1) j = me.gpos_get() lhs = "{\"type\":\"Binary\",\"op\":\"" + op + "\",\"lhs\":" + lhs + ",\"rhs\":" + rhs + "}" } } } me.gpos_set(j) return lhs }
parse_sum2(src, i) { local lhs = me.parse_term2(src, i) local j = me.gpos_get() local cont = 1 loop(cont == 1) { j = me.skip_ws(src, j) if j >= src.length() { cont = 0 } else { local op = src.substring(j, j+1) if op != "+" && op != "-" { cont = 0 } else { local rhs = me.parse_term2(src, j+1) j = me.gpos_get() lhs = "{\"type\":\"Binary\",\"op\":\"" + op + "\",\"lhs\":" + lhs + ",\"rhs\":" + rhs + "}" } } } me.gpos_set(j) return lhs }
parse_compare2(src, i) { local lhs = me.parse_sum2(src, i) local j = me.gpos_get() j = me.skip_ws(src, j) local two = src.substring(j, j+2) local one = src.substring(j, j+1) local op = "" if two == "==" || two == "!=" || two == "<=" || two == ">=" { op = two j = j + 2 } else { if one == "<" || one == ">" { op = one j = j + 1 } } if op == "" { me.gpos_set(j) return lhs } local rhs = me.parse_sum2(src, j) j = me.gpos_get() me.gpos_set(j) return "{\"type\":\"Compare\",\"op\":\"" + op + "\",\"lhs\":" + lhs + ",\"rhs\":" + rhs + "}" }
parse_expr2(src, i) { local lhs = me.parse_compare2(src, i) local j = me.gpos_get() local cont = 1 loop(cont == 1) { j = me.skip_ws(src, j) local two = src.substring(j, j+2) if two != "&&" && two != "||" { cont = 0 } else { local rhs = me.parse_compare2(src, j+2) j = me.gpos_get() lhs = "{\"type\":\"Logical\",\"op\":\"" + two + "\",\"lhs\":" + lhs + ",\"rhs\":" + rhs + "}" } } me.gpos_set(j) return lhs }
parse_expr2(src, i) {
local lhs = me.parse_compare2(src, i)
local j = me.gpos_get()
local cont = 1
loop(cont == 1) {
j = me.skip_ws(src, j)
local two = src.substring(j, j+2)
if two != "&&" && two != "||" { cont = 0 } else {
local rhs = me.parse_compare2(src, j+2)
j = me.gpos_get()
lhs = "{\"type\":\"Logical\",\"op\":\"" + two + "\",\"lhs\":" + lhs + ",\"rhs\":" + rhs + "}"
}
}
j = me.skip_ws(src, j)
if src.substring(j, j+1) == "?" {
j = j + 1
j = me.skip_ws(src, j)
local then_expr = me.parse_expr2(src, j)
j = me.gpos_get()
j = me.skip_ws(src, j)
if src.substring(j, j+1) == ":" { j = j + 1 }
j = me.skip_ws(src, j)
local else_expr = me.parse_expr2(src, j)
j = me.gpos_get()
if else_expr.length() == 0 { else_expr = "{\"type\":\"Int\",\"value\":0}" }
me.gpos_set(j)
return "{\"type\":\"Ternary\",\"cond\":" + lhs + ",\"then\":" + then_expr + ",\"else\":" + else_expr + "}"
}
me.gpos_set(j)
return lhs
}
parse_args2(src, i) {
local j = me.skip_ws(src, i)
local n = src.length()