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some more cases

This commit is contained in:
Kartik K. Agaram 2021-05-06 21:41:03 -07:00
parent a1cfadc749
commit 57fd40d500
1 changed files with 60 additions and 11 deletions
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71
shell/macroexpand.mu
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@ -112,6 +112,52 @@ fn macroexpand-iter _expr-ah: (addr handle cell), globals: (addr global-table),
trace-higher trace
return result
}
# builtins with "special" evaluation rules
macroexpand-iter:quote: {
# trees starting with single quote create literals
var quote?/eax: boolean <- symbol-equal? first, "'"
compare quote?, 0/false
break-if-=
#
trace-text trace, "mac", "quote"
trace-higher trace
return 0/false
}
# TODO: expand within backquotes
macroexpand-iter:def: {
# trees starting with "def" define globals
var def?/eax: boolean <- symbol-equal? first, "def"
compare def?, 0/false
break-if-=
#
trace-text trace, "mac", "def"
var rest/eax: (addr cell) <- lookup *rest-ah
rest-ah <- get rest, right # skip name
rest <- lookup *rest-ah
var val-ah/edx: (addr handle cell) <- get rest, left
var macro-found?/eax: boolean <- macroexpand-iter val-ah, globals, trace
trace-higher trace
return macro-found?
}
macroexpand-iter:set: {
# trees starting with "set" mutate bindings
var set?/eax: boolean <- symbol-equal? first, "set"
compare set?, 0/false
break-if-=
#
trace-text trace, "mac", "set"
var rest/eax: (addr cell) <- lookup *rest-ah
rest-ah <- get rest, right # skip name
rest <- lookup *rest-ah
var val-ah/edx: (addr handle cell) <- get rest, left
var macro-found?/eax: boolean <- macroexpand-iter val-ah, globals, trace
trace-higher trace
return macro-found?
}
# 'and' is like a function for macroexpansion purposes
# 'or' is like a function for macroexpansion purposes
# 'if' is like a function for macroexpansion purposes
# 'while' is like a function for macroexpansion purposes
# if car(expr) is a symbol defined as a macro, expand it
var definition-h: (handle cell)
var definition-ah/ebx: (addr handle cell) <- address definition-h
@ -131,18 +177,21 @@ fn macroexpand-iter _expr-ah: (addr handle cell), globals: (addr global-table),
return 0/false
}
{
var definition-car-ah/eax: (addr handle cell) <- get definition, left
var definition-car/eax: (addr cell) <- lookup *definition-car-ah
var macro?/eax: boolean <- litmac? definition-car
compare macro?, 0/false
break-if-!=
# definition not a macro
return 0/false
{
var definition-car-ah/eax: (addr handle cell) <- get definition, left
var definition-car/eax: (addr cell) <- lookup *definition-car-ah
var macro?/eax: boolean <- litmac? definition-car
compare macro?, 0/false
}
break-if-=
# definition is a macro
var macro-definition-ah/eax: (addr handle cell) <- get definition, right
# TODO: check car(macro-definition) is litfn
apply macro-definition-ah, rest-ah, expr-ah, globals, trace, 0/no-screen, 0/no-keyboard, 0/call-number
result <- copy 1/true
}
var macro-definition-ah/eax: (addr handle cell) <- get definition, right
# TODO: check car(macro-definition) is litfn
apply macro-definition-ah, rest-ah, expr-ah, globals, trace, 0/no-screen, 0/no-keyboard, 0/call-number
return 1/true
# TODO: process arbitrary function calls
return result
}
fn test-macroexpand {