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feat(frontends/lean/notation_cmd): relax restriction on user defined tokens

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Before this commit, Lean would forbid new tokens containing '(' or ')'.
We relax this restriction. Now, we just forbid new tokens starting with '(' or ending with ')'.
This commit is contained in:
Leonardo de Moura 2016-01-02 13:58:46 -08:00
parent 4eb2690c32
commit 5feef27c2b
3 changed files with 19 additions and 12 deletions
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10
library/algebra/interval.lean
View file

@ -32,14 +32,14 @@ definition Icu (a : A) : set A := {x | a ≤ x}
definition Iuo (b : A) : set A := {x | x < b}
definition Iuc (b : A) : set A := {x | x ≤ b}
notation `'` `(` a `, ` b `)` := Ioo a b
notation `'` `(` a `, ` b `]` := Ioc a b
notation `'(` a `, ` b `)` := Ioo a b
notation `'(` a `, ` b `]` := Ioc a b
notation `'[` a `, ` b `)` := Ico a b
notation `'[` a `, ` b `]` := Icc a b
notation `'` `(` a `, ` `∞` `)` := Iou a
notation `'(` a `, ` `∞` `)` := Iou a
notation `'[` a `, ` `∞` `)` := Icu a
notation `'` `(` `-∞` `, ` b `)` := Iuo b
notation `'` `(` `-∞` `, ` b `]` := Iuc b
notation `'(` `-∞` `, ` b `)` := Iuo b
notation `'(` `-∞` `, ` b `]` := Iuc b
variables a b : A

9
src/frontends/lean/notation_cmd.cpp
View file

@ -662,9 +662,16 @@ notation_entry parse_notation(parser & p, bool overload, buffer<token_entry> & n
return parse_notation(p, overload, grp, new_tokens, allow_local);
}
static char g_reserved_chars[] = {'(', ')', ',', 0};
static char g_reserved_chars[] = {',', 0};
static void check_token(char const * tk) {
if (!tk || !*tk)
throw exception("invalid null token");
if (tk[0] == '(')
throw exception(sstream() << "invalid token `" << tk << "`, it starts with '('");
unsigned sz = strlen(tk);
if (tk[sz-1] == ')')
throw exception(sstream() << "invalid token `" << tk << "`, it ends with ')'");
while (tk && *tk) {
unsigned sz = get_utf8_size(*tk);
if (sz == 0) {

6
tests/lean/notation5.lean.expected.out
View file

@ -1,5 +1,5 @@
notation5.lean:3:0: error: invalid token `((`, it contains reserved character `(`
notation5.lean:5:0: error: invalid token `(`, it contains reserved character `(`
notation5.lean:7:0: error: invalid token `))`, it contains reserved character `)`
notation5.lean:3:0: error: invalid token `((`, it starts with '('
notation5.lean:5:0: error: invalid token `(`, it starts with '('
notation5.lean:7:0: error: invalid token `))`, it ends with ')'
notation5.lean:9:0: error: invalid token `,,`, it contains reserved character `,`
notation5.lean:11:0: error: invalid token `,`, it contains reserved character `,`